v0.0.481

.idea/.gitignore

@@ -6,3 +6,5 @@
 # Datasource local storage ignored files
 /dataSources/
 /dataSources.local.xml
+# GitHub Copilot persisted chat sessions
+/copilot/chatSessions

.idea/sqldialects.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="SqlDialectMappings">
+    <file url="file://$PROJECT_DIR$/sq/sq_test.go" dialect="SQLite" />
+  </component>
+</project>

README.md

@@ -30,7 +30,7 @@ Potentially needs `export GOPRIVATE="gogs.mikescher.com"`
 | confext     | Mike       | Parses environment configuration into structs                                                                 |
 | cmdext      | Mike       | Runner for external commands/processes                                                                        |
 |             |            |                                                                                                               |
-| sq          | Mike       | Utility functions for sql based databases                                                                     |
+| sq          | Mike       | Utility functions for sql based databases (primarily sqlite)                                                  |
 | tst         | Mike       | Utility functions for unit tests                                                                              |
 |             |            |                                                                                                               |
 | rfctime     | Mike       | Classes for time seriallization, with different marshallign method for mongo and json                         |
@@ -40,4 +40,6 @@ Potentially needs `export GOPRIVATE="gogs.mikescher.com"`
 |             |            |                                                                                                               |
 | rext        | Mike       | Regex Wrapper, wraps regexp with a better interface                                                           |
 | wmo         | Mike       | Mongo Wrapper, wraps mongodb with a better interface                                                          |
+|             |            |                                                                                                               |
+| scn         | Mike       | SimpleCloudNotifier                                                                                           |
 |             |            |                                                                                                               |

TODO.md

@@ -2,6 +2,8 @@
 
  - cronext
 
- - rfctime.DateOnly
  - rfctime.HMSTimeOnly
- - rfctime.NanoTimeOnly
+ - rfctime.NanoTimeOnly
+
+ - remove sqlx dependency from sq  (unmaintained, and mostly superseeded by our own stuff?)
+ - Move DBLogger and DBPreprocessor to sq

bfcodegen/csid-generate.go

@@ -26,6 +26,10 @@ type CSIDDef struct {
 	Prefix       string
 }
 
+type CSIDGenOptions struct {
+	DebugOutput *bool
+}
+
 var rexCSIDPackage = rext.W(regexp.MustCompile(`^package\s+(?P<name>[A-Za-z0-9_]+)\s*$`))
 
 var rexCSIDDef = rext.W(regexp.MustCompile(`^\s*type\s+(?P<name>[A-Za-z0-9_]+)\s+string\s*//\s*(@csid:type)\s+\[(?P<prefix>[A-Z0-9]{3})].*$`))
@@ -35,7 +39,9 @@ var rexCSIDChecksumConst = rext.W(regexp.MustCompile(`const ChecksumCharsetIDGen
 //go:embed csid-generate.template
 var templateCSIDGenerateText string
 
-func GenerateCharsetIDSpecs(sourceDir string, destFile string) error {
+func GenerateCharsetIDSpecs(sourceDir string, destFile string, opt CSIDGenOptions) error {
+
+	debugOutput := langext.Coalesce(opt.DebugOutput, false)
 
 	files, err := os.ReadDir(sourceDir)
 	if err != nil {
@@ -70,9 +76,9 @@ func GenerateCharsetIDSpecs(sourceDir string, destFile string) error {
 	newChecksum := cryptext.BytesSha256([]byte(newChecksumStr))
 
 	if newChecksum != oldChecksum {
-		fmt.Printf("[IDGenerate] Checksum has changed ( %s -> %s ), will generate new file\n\n", oldChecksum, newChecksum)
+		fmt.Printf("[CSIDGenerate] Checksum has changed ( %s -> %s ), will generate new file\n\n", oldChecksum, newChecksum)
 	} else {
-		fmt.Printf("[IDGenerate] Checksum unchanged ( %s ), nothing to do\n", oldChecksum)
+		fmt.Printf("[CSIDGenerate] Checksum unchanged ( %s ), nothing to do\n", oldChecksum)
 		return nil
 	}
 
@@ -81,13 +87,18 @@ func GenerateCharsetIDSpecs(sourceDir string, destFile string) error {
 	pkgname := ""
 
 	for _, f := range files {
-		fmt.Printf("========= %s =========\n\n", f.Name())
+		if debugOutput {
-		fileIDs, pn, err := processCSIDFile(sourceDir, path.Join(sourceDir, f.Name()))
+			fmt.Printf("========= %s =========\n\n", f.Name())
+		}
+
+		fileIDs, pn, err := processCSIDFile(sourceDir, path.Join(sourceDir, f.Name()), debugOutput)
 		if err != nil {
 			return err
 		}
 
-		fmt.Printf("\n")
+		if debugOutput {
+			fmt.Printf("\n")
+		}
 
 		allIDs = append(allIDs, fileIDs...)
 
@@ -113,7 +124,7 @@ func GenerateCharsetIDSpecs(sourceDir string, destFile string) error {
 	return nil
 }
 
-func processCSIDFile(basedir string, fn string) ([]CSIDDef, string, error) {
+func processCSIDFile(basedir string, fn string, debugOutput bool) ([]CSIDDef, string, error) {
 	file, err := os.Open(fn)
 	if err != nil {
 		return nil, "", err
@@ -155,7 +166,11 @@ func processCSIDFile(basedir string, fn string) ([]CSIDDef, string, error) {
 				Name:         match.GroupByName("name").Value(),
 				Prefix:       match.GroupByName("prefix").Value(),
 			}
-			fmt.Printf("Found ID definition { '%s' }\n", def.Name)
+
+			if debugOutput {
+				fmt.Printf("Found ID definition { '%s' }\n", def.Name)
+			}
+
 			ids = append(ids, def)
 		}
 	}

bfcodegen/csid-generate_test.go

@@ -12,8 +12,8 @@ import (
 	"time"
 )
 
-//go:embed _test_example.tgz
+//go:embed _test_example_1.tgz
-var CSIDExampleModels []byte
+var CSIDExampleModels1 []byte
 
 func TestGenerateCSIDSpecs(t *testing.T) {
 
@@ -21,7 +21,7 @@ func TestGenerateCSIDSpecs(t *testing.T) {
 
 	tmpDir := filepath.Join(t.TempDir(), langext.MustHexUUID())
 
-	err := os.WriteFile(tmpFile, CSIDExampleModels, 0o777)
+	err := os.WriteFile(tmpFile, CSIDExampleModels1, 0o777)
 	tst.AssertNoErr(t, err)
 
 	t.Cleanup(func() { _ = os.Remove(tmpFile) })
@@ -34,10 +34,10 @@ func TestGenerateCSIDSpecs(t *testing.T) {
 	_, err = cmdext.Runner("tar").Arg("-xvzf").Arg(tmpFile).Arg("-C").Arg(tmpDir).FailOnExitCode().FailOnTimeout().Timeout(time.Minute).Run()
 	tst.AssertNoErr(t, err)
 
-	err = GenerateCharsetIDSpecs(tmpDir, tmpDir+"/csid_gen.go")
+	err = GenerateCharsetIDSpecs(tmpDir, tmpDir+"/csid_gen.go", CSIDGenOptions{DebugOutput: langext.PTrue})
 	tst.AssertNoErr(t, err)
 
-	err = GenerateCharsetIDSpecs(tmpDir, tmpDir+"/csid_gen.go")
+	err = GenerateCharsetIDSpecs(tmpDir, tmpDir+"/csid_gen.go", CSIDGenOptions{DebugOutput: langext.PTrue})
 	tst.AssertNoErr(t, err)
 
 	fmt.Println()

bfcodegen/enum-generate.go

@@ -3,6 +3,7 @@ package bfcodegen
 import (
 	"bytes"
 	_ "embed"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"go/format"
@@ -14,6 +15,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"reflect"
 	"regexp"
 	"strings"
 	"text/template"
@@ -23,6 +25,8 @@ type EnumDefVal struct {
 	VarName     string
 	Value       string
 	Description *string
+	Data        *map[string]any
+	RawComment  *string
 }
 
 type EnumDef struct {
@@ -33,23 +37,23 @@ type EnumDef struct {
 	Values       []EnumDefVal
 }
 
+type EnumGenOptions struct {
+	DebugOutput *bool
+	GoFormat    *bool
+}
+
 var rexEnumPackage = rext.W(regexp.MustCompile(`^package\s+(?P<name>[A-Za-z0-9_]+)\s*$`))
 
 var rexEnumDef = rext.W(regexp.MustCompile(`^\s*type\s+(?P<name>[A-Za-z0-9_]+)\s+(?P<type>[A-Za-z0-9_]+)\s*//\s*(@enum:type).*$`))
 
-var rexEnumValueDef = rext.W(regexp.MustCompile(`^\s*(?P<name>[A-Za-z0-9_]+)\s+(?P<type>[A-Za-z0-9_]+)\s*=\s*(?P<value>("[A-Za-z0-9_:\s\-.]+"|[0-9]+))\s*(//(?P<descr>.*))?.*$`))
+var rexEnumValueDef = rext.W(regexp.MustCompile(`^\s*(?P<name>[A-Za-z0-9_]+)\s+(?P<type>[A-Za-z0-9_]+)\s*=\s*(?P<value>("[A-Za-z0-9_:\s\-.]+"|[0-9]+))\s*(//(?P<comm>.*))?.*$`))
 
 var rexEnumChecksumConst = rext.W(regexp.MustCompile(`const ChecksumEnumGenerator = "(?P<cs>[A-Za-z0-9_]*)"`))
 
 //go:embed enum-generate.template
 var templateEnumGenerateText string
 
-func GenerateEnumSpecs(sourceDir string, destFile string) error {
+func GenerateEnumSpecs(sourceDir string, destFile string, opt EnumGenOptions) error {
-
-	files, err := os.ReadDir(sourceDir)
-	if err != nil {
-		return err
-	}
 
 	oldChecksum := "N/A"
 	if _, err := os.Stat(destFile); !os.IsNotExist(err) {
@@ -62,6 +66,30 @@ func GenerateEnumSpecs(sourceDir string, destFile string) error {
 		}
 	}
 
+	gocode, _, changed, err := _generateEnumSpecs(sourceDir, destFile, oldChecksum, langext.Coalesce(opt.GoFormat, true), langext.Coalesce(opt.DebugOutput, false))
+	if err != nil {
+		return err
+	}
+
+	if !changed {
+		return nil
+	}
+
+	err = os.WriteFile(destFile, []byte(gocode), 0o755)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func _generateEnumSpecs(sourceDir string, destFile string, oldChecksum string, gofmt bool, debugOutput bool) (string, string, bool, error) {
+
+	files, err := os.ReadDir(sourceDir)
+	if err != nil {
+		return "", "", false, err
+	}
+
 	files = langext.ArrFilter(files, func(v os.DirEntry) bool { return v.Name() != path.Base(destFile) })
 	files = langext.ArrFilter(files, func(v os.DirEntry) bool { return strings.HasSuffix(v.Name(), ".go") })
 	files = langext.ArrFilter(files, func(v os.DirEntry) bool { return !strings.HasSuffix(v.Name(), "_gen.go") })
@@ -71,7 +99,7 @@ func GenerateEnumSpecs(sourceDir string, destFile string) error {
 	for _, f := range files {
 		content, err := os.ReadFile(path.Join(sourceDir, f.Name()))
 		if err != nil {
-			return err
+			return "", "", false, err
 		}
 		newChecksumStr += "\n" + f.Name() + "\t" + cryptext.BytesSha256(content)
 	}
@@ -82,7 +110,7 @@ func GenerateEnumSpecs(sourceDir string, destFile string) error {
 		fmt.Printf("[EnumGenerate] Checksum has changed ( %s -> %s ), will generate new file\n\n", oldChecksum, newChecksum)
 	} else {
 		fmt.Printf("[EnumGenerate] Checksum unchanged ( %s ), nothing to do\n", oldChecksum)
-		return nil
+		return "", oldChecksum, false, nil
 	}
 
 	allEnums := make([]EnumDef, 0)
@@ -90,13 +118,18 @@ func GenerateEnumSpecs(sourceDir string, destFile string) error {
 	pkgname := ""
 
 	for _, f := range files {
-		fmt.Printf("========= %s =========\n\n", f.Name())
+		if debugOutput {
-		fileEnums, pn, err := processEnumFile(sourceDir, path.Join(sourceDir, f.Name()))
+			fmt.Printf("========= %s =========\n\n", f.Name())
-		if err != nil {
-			return err
 		}
 
-		fmt.Printf("\n")
+		fileEnums, pn, err := processEnumFile(sourceDir, path.Join(sourceDir, f.Name()), debugOutput)
+		if err != nil {
+			return "", "", false, err
+		}
+
+		if debugOutput {
+			fmt.Printf("\n")
+		}
 
 		allEnums = append(allEnums, fileEnums...)
 
@@ -106,23 +139,24 @@ func GenerateEnumSpecs(sourceDir string, destFile string) error {
 	}
 
 	if pkgname == "" {
-		return errors.New("no package name found in any file")
+		return "", "", false, errors.New("no package name found in any file")
 	}
 
-	fdata, err := format.Source([]byte(fmtEnumOutput(newChecksum, allEnums, pkgname)))
+	rdata := fmtEnumOutput(newChecksum, allEnums, pkgname)
+
+	if !gofmt {
+		return rdata, newChecksum, true, nil
+	}
+
+	fdata, err := format.Source([]byte(rdata))
 	if err != nil {
-		return err
+		return "", "", false, err
 	}
 
-	err = os.WriteFile(destFile, fdata, 0o755)
+	return string(fdata), newChecksum, true, nil
-	if err != nil {
-		return err
-	}
-
-	return nil
 }
 
-func processEnumFile(basedir string, fn string) ([]EnumDef, string, error) {
+func processEnumFile(basedir string, fn string, debugOutput bool) ([]EnumDef, string, error) {
 	file, err := os.Open(fn)
 	if err != nil {
 		return nil, "", err
@@ -166,15 +200,42 @@ func processEnumFile(basedir string, fn string) ([]EnumDef, string, error) {
 				Values:       make([]EnumDefVal, 0),
 			}
 			enums = append(enums, def)
-			fmt.Printf("Found enum definition { '%s' -> '%s' }\n", def.EnumTypeName, def.Type)
+
+			if debugOutput {
+				fmt.Printf("Found enum definition { '%s' -> '%s' }\n", def.EnumTypeName, def.Type)
+			}
 		}
 
 		if match, ok := rexEnumValueDef.MatchFirst(line); ok {
 			typename := match.GroupByName("type").Value()
+
+			comment := match.GroupByNameOrEmpty("comm").ValueOrNil()
+			var descr *string = nil
+			var data *map[string]any = nil
+			if comment != nil {
+				comment = langext.Ptr(strings.TrimSpace(*comment))
+				if strings.HasPrefix(*comment, "{") {
+					if v, ok := tryParseDataComment(*comment); ok {
+						data = &v
+						if anyDataDescr, ok := v["description"]; ok {
+							if dataDescr, ok := anyDataDescr.(string); ok {
+								descr = &dataDescr
+							}
+						}
+					} else {
+						descr = comment
+					}
+				} else {
+					descr = comment
+				}
+			}
+
 			def := EnumDefVal{
 				VarName:     match.GroupByName("name").Value(),
 				Value:       match.GroupByName("value").Value(),
-				Description: match.GroupByNameOrEmpty("descr").ValueOrNil(),
+				RawComment:  comment,
+				Description: descr,
+				Data:        data,
 			}
 
 			found := false
@@ -182,16 +243,21 @@ func processEnumFile(basedir string, fn string) ([]EnumDef, string, error) {
 				if v.EnumTypeName == typename {
 					enums[i].Values = append(enums[i].Values, def)
 					found = true
-					if def.Description != nil {
+
-						fmt.Printf("Found enum value [%s] for '%s'  ('%s')\n", def.Value, def.VarName, *def.Description)
+					if debugOutput {
-					} else {
+						if def.Description != nil {
-						fmt.Printf("Found enum value [%s] for '%s'\n", def.Value, def.VarName)
+							fmt.Printf("Found enum value [%s] for '%s'  ('%s')\n", def.Value, def.VarName, *def.Description)
+						} else {
+							fmt.Printf("Found enum value [%s] for '%s'\n", def.Value, def.VarName)
+						}
 					}
 					break
 				}
 			}
 			if !found {
-				fmt.Printf("Found non-enum value [%s] for '%s' ( looks like enum value, but no matching @enum:type )\n", def.Value, def.VarName)
+				if debugOutput {
+					fmt.Printf("Found non-enum value [%s] for '%s' ( looks like enum value, but no matching @enum:type )\n", def.Value, def.VarName)
+				}
 			}
 		}
 	}
@@ -199,6 +265,41 @@ func processEnumFile(basedir string, fn string) ([]EnumDef, string, error) {
 	return enums, pkgname, nil
 }
 
+func tryParseDataComment(s string) (map[string]any, bool) {
+
+	r := make(map[string]any)
+
+	err := json.Unmarshal([]byte(s), &r)
+	if err != nil {
+		return nil, false
+	}
+
+	for _, v := range r {
+
+		rv := reflect.ValueOf(v)
+
+		if rv.Kind() == reflect.Ptr && rv.IsNil() {
+			continue
+		}
+		if rv.Kind() == reflect.Bool {
+			continue
+		}
+		if rv.Kind() == reflect.String {
+			continue
+		}
+		if rv.Kind() == reflect.Int64 {
+			continue
+		}
+		if rv.Kind() == reflect.Float64 {
+			continue
+		}
+
+		return nil, false
+	}
+
+	return r, true
+}
+
 func fmtEnumOutput(cs string, enums []EnumDef, pkgname string) string {
 
 	templ := template.New("enum-generate")
@@ -211,6 +312,47 @@ func fmtEnumOutput(cs string, enums []EnumDef, pkgname string) string {
 		"hasDescr": func(v EnumDef) bool {
 			return langext.ArrAll(v.Values, func(val EnumDefVal) bool { return val.Description != nil })
 		},
+		"hasData": func(v EnumDef) bool {
+			return len(v.Values) > 0 && langext.ArrAll(v.Values, func(val EnumDefVal) bool { return val.Data != nil })
+		},
+		"gostr": func(v any) string {
+			return fmt.Sprintf("%#+v", v)
+		},
+		"goobj": func(name string, v any) string {
+			return fmt.Sprintf("%#+v", v)
+		},
+		"godatakey": func(v string) string {
+			return strings.ToUpper(v[0:1]) + v[1:]
+		},
+		"godatavalue": func(v any) string {
+			return fmt.Sprintf("%#+v", v)
+		},
+		"godatatype": func(v any) string {
+			return fmt.Sprintf("%T", v)
+		},
+		"mapindex": func(v map[string]any, k string) any {
+			return v[k]
+		},
+		"generalDataKeys": func(v EnumDef) map[string]string {
+			r0 := make(map[string]int)
+
+			for _, eval := range v.Values {
+				for k := range *eval.Data {
+					if ctr, ok := r0[k]; ok {
+						r0[k] = ctr + 1
+					} else {
+						r0[k] = 1
+					}
+				}
+			}
+
+			r1 := langext.MapToArr(r0)
+			r2 := langext.ArrFilter(r1, func(p langext.MapEntry[string, int]) bool { return p.Value == len(v.Values) })
+			r3 := langext.ArrMap(r2, func(p langext.MapEntry[string, int]) string { return p.Key })
+			r4 := langext.ArrToKVMap(r3, func(p string) string { return p }, func(p string) string { return fmt.Sprintf("%T", (*v.Values[0].Data)[p]) })
+
+			return r4
+		},
 	})
 
 	templ = template.Must(templ.Parse(templateEnumGenerateText))

bfcodegen/enum-generate.template

@@ -7,25 +7,44 @@ import "gogs.mikescher.com/BlackForestBytes/goext/enums"
 
 const ChecksumEnumGenerator = "{{.Checksum}}" // GoExtVersion: {{.GoextVersion}}
 
+{{ $pkgname  := .PkgName }}
+
 {{range .Enums}}
 
 {{ $hasStr   := ( . | hasStr   ) }}
 {{ $hasDescr := ( . | hasDescr ) }}
+{{ $hasData  := ( . | hasData  ) }}
 
 // ================================ {{.EnumTypeName}} ================================
 //
 // File:       {{.FileRelative}}
 // StringEnum: {{$hasStr   | boolToStr}}
 // DescrEnum:  {{$hasDescr | boolToStr}}
+// DataEnum:   {{$hasData  | boolToStr}}
 //
 
+{{ $typename := .EnumTypeName }}
+{{ $enumdef  := . }}
+
 var __{{.EnumTypeName}}Values = []{{.EnumTypeName}}{ {{range .Values}}
 	{{.VarName}}, {{end}}
 }
 
 {{if $hasDescr}}
 var __{{.EnumTypeName}}Descriptions = map[{{.EnumTypeName}}]string{ {{range .Values}}
-	{{.VarName}}: "{{.Description | deref | trimSpace}}", {{end}}
+	{{.VarName}}: {{.Description | deref | trimSpace | gostr}}, {{end}}
+}
+{{end}}
+
+{{if $hasData}}
+type {{ .EnumTypeName }}Data struct { {{ range $datakey, $datatype := ($enumdef | generalDataKeys)  }}
+    {{ $datakey | godatakey }} {{ $datatype }} `json:"{{ $datakey }}"` {{ end }}
+}
+
+var __{{.EnumTypeName}}Data = map[{{.EnumTypeName}}]{{.EnumTypeName}}Data{ {{range .Values}} {{ $enumvalue := . }}
+	{{.VarName}}: {{ $typename }}Data{ {{ range $datakey, $datatype := $enumdef | generalDataKeys  }}
+	    {{ $datakey | godatakey }}: {{ (mapindex $enumvalue.Data $datakey) | godatavalue }}, {{ end }}
+	}, {{end}}
 }
 {{end}}
 
@@ -64,6 +83,15 @@ func (e {{.EnumTypeName}}) Description() string {
 }
 {{end}}
 
+{{if $hasData}}
+func (e {{.EnumTypeName}}) Data() {{.EnumTypeName}}Data {
+	if d, ok := __{{.EnumTypeName}}Data[e]; ok {
+		return d
+	}
+	return {{.EnumTypeName}}Data{}
+}
+{{end}}
+
 func (e {{.EnumTypeName}}) VarName() string {
 	if d, ok := __{{.EnumTypeName}}Varnames[e]; ok {
 		return d
@@ -71,6 +99,14 @@ func (e {{.EnumTypeName}}) VarName() string {
 	return ""
 }
 
+func (e {{.EnumTypeName}}) TypeName() string {
+	return "{{$typename}}"
+}
+
+func (e {{.EnumTypeName}}) PackageName() string {
+	return "{{$pkgname }}"
+}
+
 func (e {{.EnumTypeName}}) Meta() enums.EnumMetaValue {
     {{if $hasDescr}} return enums.EnumMetaValue{VarName: e.VarName(), Value: e, Description: langext.Ptr(e.Description())} {{else}} return enums.EnumMetaValue{VarName: e.VarName(), Value: e, Description: nil} {{end}}
 }
@@ -108,4 +144,12 @@ func {{.EnumTypeName}}ValuesDescriptionMeta() []enums.EnumDescriptionMetaValue {
 }
 {{end}}
 
-{{end}}
+{{end}}
+
+// ================================ ================= ================================
+
+func AllPackageEnums() []enums.Enum {
+    return []enums.Enum{ {{range .Enums}}
+        {{ if gt (len .Values) 0 }} {{  $v := index .Values 0 }} {{ $v.VarName}}, {{end}} // {{ .EnumTypeName }} {{end}}
+    }
+}

bfcodegen/enum-generate_test.go

@@ -12,8 +12,11 @@ import (
 	"time"
 )
 
-//go:embed _test_example.tgz
+//go:embed _test_example_1.tgz
-var EnumExampleModels []byte
+var EnumExampleModels1 []byte
+
+//go:embed _test_example_2.tgz
+var EnumExampleModels2 []byte
 
 func TestGenerateEnumSpecs(t *testing.T) {
 
@@ -21,7 +24,7 @@ func TestGenerateEnumSpecs(t *testing.T) {
 
 	tmpDir := filepath.Join(t.TempDir(), langext.MustHexUUID())
 
-	err := os.WriteFile(tmpFile, EnumExampleModels, 0o777)
+	err := os.WriteFile(tmpFile, EnumExampleModels1, 0o777)
 	tst.AssertNoErr(t, err)
 
 	t.Cleanup(func() { _ = os.Remove(tmpFile) })
@@ -34,17 +37,53 @@ func TestGenerateEnumSpecs(t *testing.T) {
 	_, err = cmdext.Runner("tar").Arg("-xvzf").Arg(tmpFile).Arg("-C").Arg(tmpDir).FailOnExitCode().FailOnTimeout().Timeout(time.Minute).Run()
 	tst.AssertNoErr(t, err)
 
-	err = GenerateEnumSpecs(tmpDir, tmpDir+"/enums_gen.go")
+	s1, cs1, _, err := _generateEnumSpecs(tmpDir, "", "N/A", true, true)
 	tst.AssertNoErr(t, err)
 
-	err = GenerateEnumSpecs(tmpDir, tmpDir+"/enums_gen.go")
+	s2, cs2, _, err := _generateEnumSpecs(tmpDir, "", "N/A", true, true)
 	tst.AssertNoErr(t, err)
 
+	tst.AssertEqual(t, cs1, cs2)
+	tst.AssertEqual(t, s1, s2)
+
 	fmt.Println()
 	fmt.Println()
 	fmt.Println()
 	fmt.Println("=====================================================================================================")
-	fmt.Println(string(tst.Must(os.ReadFile(tmpDir + "/enums_gen.go"))(t)))
+	fmt.Println(s1)
+	fmt.Println("=====================================================================================================")
+	fmt.Println()
+	fmt.Println()
+	fmt.Println()
+}
+
+func TestGenerateEnumSpecsData(t *testing.T) {
+
+	tmpFile := filepath.Join(t.TempDir(), langext.MustHexUUID()+".tgz")
+
+	tmpDir := filepath.Join(t.TempDir(), langext.MustHexUUID())
+
+	err := os.WriteFile(tmpFile, EnumExampleModels2, 0o777)
+	tst.AssertNoErr(t, err)
+
+	t.Cleanup(func() { _ = os.Remove(tmpFile) })
+
+	err = os.Mkdir(tmpDir, 0o777)
+	tst.AssertNoErr(t, err)
+
+	t.Cleanup(func() { _ = os.RemoveAll(tmpFile) })
+
+	_, err = cmdext.Runner("tar").Arg("-xvzf").Arg(tmpFile).Arg("-C").Arg(tmpDir).FailOnExitCode().FailOnTimeout().Timeout(time.Minute).Run()
+	tst.AssertNoErr(t, err)
+
+	s1, _, _, err := _generateEnumSpecs(tmpDir, "", "", true, true)
+	tst.AssertNoErr(t, err)
+
+	fmt.Println()
+	fmt.Println()
+	fmt.Println()
+	fmt.Println("=====================================================================================================")
+	fmt.Println(s1)
 	fmt.Println("=====================================================================================================")
 	fmt.Println()
 	fmt.Println()

bfcodegen/id-generate.go

@@ -25,6 +25,10 @@ type IDDef struct {
 	Name         string
 }
 
+type IDGenOptions struct {
+	DebugOutput *bool
+}
+
 var rexIDPackage = rext.W(regexp.MustCompile(`^package\s+(?P<name>[A-Za-z0-9_]+)\s*$`))
 
 var rexIDDef = rext.W(regexp.MustCompile(`^\s*type\s+(?P<name>[A-Za-z0-9_]+)\s+string\s*//\s*(@id:type).*$`))
@@ -34,7 +38,9 @@ var rexIDChecksumConst = rext.W(regexp.MustCompile(`const ChecksumIDGenerator =
 //go:embed id-generate.template
 var templateIDGenerateText string
 
-func GenerateIDSpecs(sourceDir string, destFile string) error {
+func GenerateIDSpecs(sourceDir string, destFile string, opt IDGenOptions) error {
+
+	debugOutput := langext.Coalesce(opt.DebugOutput, false)
 
 	files, err := os.ReadDir(sourceDir)
 	if err != nil {
@@ -80,13 +86,18 @@ func GenerateIDSpecs(sourceDir string, destFile string) error {
 	pkgname := ""
 
 	for _, f := range files {
-		fmt.Printf("========= %s =========\n\n", f.Name())
+		if debugOutput {
-		fileIDs, pn, err := processIDFile(sourceDir, path.Join(sourceDir, f.Name()))
+			fmt.Printf("========= %s =========\n\n", f.Name())
+		}
+
+		fileIDs, pn, err := processIDFile(sourceDir, path.Join(sourceDir, f.Name()), debugOutput)
 		if err != nil {
 			return err
 		}
 
-		fmt.Printf("\n")
+		if debugOutput {
+			fmt.Printf("\n")
+		}
 
 		allIDs = append(allIDs, fileIDs...)
 
@@ -112,7 +123,7 @@ func GenerateIDSpecs(sourceDir string, destFile string) error {
 	return nil
 }
 
-func processIDFile(basedir string, fn string) ([]IDDef, string, error) {
+func processIDFile(basedir string, fn string, debugOutput bool) ([]IDDef, string, error) {
 	file, err := os.Open(fn)
 	if err != nil {
 		return nil, "", err
@@ -153,7 +164,11 @@ func processIDFile(basedir string, fn string) ([]IDDef, string, error) {
 				FileRelative: rfp,
 				Name:         match.GroupByName("name").Value(),
 			}
-			fmt.Printf("Found ID definition { '%s' }\n", def.Name)
+
+			if debugOutput {
+				fmt.Printf("Found ID definition { '%s' }\n", def.Name)
+			}
+
 			ids = append(ids, def)
 		}
 	}

bfcodegen/id-generate_test.go

@@ -12,8 +12,8 @@ import (
 	"time"
 )
 
-//go:embed _test_example.tgz
+//go:embed _test_example_1.tgz
-var IDExampleModels []byte
+var IDExampleModels1 []byte
 
 func TestGenerateIDSpecs(t *testing.T) {
 
@@ -21,7 +21,7 @@ func TestGenerateIDSpecs(t *testing.T) {
 
 	tmpDir := filepath.Join(t.TempDir(), langext.MustHexUUID())
 
-	err := os.WriteFile(tmpFile, IDExampleModels, 0o777)
+	err := os.WriteFile(tmpFile, IDExampleModels1, 0o777)
 	tst.AssertNoErr(t, err)
 
 	t.Cleanup(func() { _ = os.Remove(tmpFile) })
@@ -34,10 +34,10 @@ func TestGenerateIDSpecs(t *testing.T) {
 	_, err = cmdext.Runner("tar").Arg("-xvzf").Arg(tmpFile).Arg("-C").Arg(tmpDir).FailOnExitCode().FailOnTimeout().Timeout(time.Minute).Run()
 	tst.AssertNoErr(t, err)
 
-	err = GenerateIDSpecs(tmpDir, tmpDir+"/id_gen.go")
+	err = GenerateIDSpecs(tmpDir, tmpDir+"/id_gen.go", IDGenOptions{DebugOutput: langext.PTrue})
 	tst.AssertNoErr(t, err)
 
-	err = GenerateIDSpecs(tmpDir, tmpDir+"/id_gen.go")
+	err = GenerateIDSpecs(tmpDir, tmpDir+"/id_gen.go", IDGenOptions{DebugOutput: langext.PTrue})
 	tst.AssertNoErr(t, err)
 
 	fmt.Println()

cryptext/pronouncablePassword.go

@@ -0,0 +1,263 @@
+package cryptext
+
+import (
+	"crypto/rand"
+	"io"
+	"math/big"
+	mathrand "math/rand"
+	"strings"
+)
+
+const (
+	ppStartChar            = "BCDFGHJKLMNPQRSTVWXZ"
+	ppEndChar              = "ABDEFIKMNORSTUXYZ"
+	ppVowel                = "AEIOUY"
+	ppConsonant            = "BCDFGHJKLMNPQRSTVWXZ"
+	ppSegmentLenMin        = 3
+	ppSegmentLenMax        = 7
+	ppMaxRepeatedVowel     = 2
+	ppMaxRepeatedConsonant = 2
+)
+
+var ppContinuation = map[uint8]string{
+	'A': "BCDFGHJKLMNPRSTVWXYZ",
+	'B': "ADFIKLMNORSTUY",
+	'C': "AEIKOUY",
+	'D': "AEILORSUYZ",
+	'E': "BCDFGHJKLMNPRSTVWXYZ",
+	'F': "ADEGIKLOPRTUY",
+	'G': "ABDEFHILMNORSTUY",
+	'H': "AEIOUY",
+	'I': "BCDFGHJKLMNPRSTVWXZ",
+	'J': "AEIOUY",
+	'K': "ADEFHILMNORSTUY",
+	'L': "ADEFGIJKMNOPSTUVWYZ",
+	'M': "ABEFIKOPSTUY",
+	'N': "ABEFIKOPSTUY",
+	'O': "BCDFGHJKLMNPRSTVWXYZ",
+	'P': "AEFIJLORSTUY",
+	'Q': "AEIOUY",
+	'R': "ADEFGHIJKLMNOPSTUVYZ",
+	'S': "ACDEIKLOPTUYZ",
+	'T': "AEHIJOPRSUWY",
+	'U': "BCDFGHJKLMNPRSTVWXZ",
+	'V': "AEIOUY",
+	'W': "AEIOUY",
+	'X': "AEIOUY",
+	'Y': "ABCDFGHKLMNPRSTVXZ",
+	'Z': "AEILOTUY",
+}
+
+var ppLog2Map = map[int]float64{
+	1:  0.00000000,
+	2:  1.00000000,
+	3:  1.58496250,
+	4:  2.00000000,
+	5:  2.32192809,
+	6:  2.58496250,
+	7:  2.80735492,
+	8:  3.00000000,
+	9:  3.16992500,
+	10: 3.32192809,
+	11: 3.45943162,
+	12: 3.58496250,
+	13: 3.70043972,
+	14: 3.80735492,
+	15: 3.90689060,
+	16: 4.00000000,
+	17: 4.08746284,
+	18: 4.16992500,
+	19: 4.24792751,
+	20: 4.32192809,
+	21: 4.39231742,
+	22: 4.45943162,
+	23: 4.52356196,
+	24: 4.58496250,
+	25: 4.64385619,
+	26: 4.70043972,
+	27: 4.75488750,
+	28: 4.80735492,
+	29: 4.85798100,
+	30: 4.90689060,
+	31: 4.95419631,
+	32: 5.00000000,
+}
+
+var (
+	ppVowelMap     = ppMakeSet(ppVowel)
+	ppConsonantMap = ppMakeSet(ppConsonant)
+	ppEndCharMap   = ppMakeSet(ppEndChar)
+)
+
+func ppMakeSet(v string) map[uint8]bool {
+	mp := make(map[uint8]bool, len(v))
+	for _, chr := range v {
+		mp[uint8(chr)] = true
+	}
+	return mp
+}
+
+func ppRandInt(rng io.Reader, max int) int {
+	v, err := rand.Int(rng, big.NewInt(int64(max)))
+	if err != nil {
+		panic(err)
+	}
+	return int(v.Int64())
+}
+
+func ppRand(rng io.Reader, chars string, entropy *float64) uint8 {
+	chr := chars[ppRandInt(rng, len(chars))]
+
+	*entropy = *entropy + ppLog2Map[len(chars)]
+
+	return chr
+}
+
+func ppCharType(chr uint8) (bool, bool) {
+	_, ok1 := ppVowelMap[chr]
+	_, ok2 := ppConsonantMap[chr]
+
+	return ok1, ok2
+}
+
+func ppCharsetRemove(cs string, set map[uint8]bool, allowEmpty bool) string {
+	result := ""
+	for _, chr := range cs {
+		if _, ok := set[uint8(chr)]; !ok {
+			result += string(chr)
+		}
+	}
+	if result == "" && !allowEmpty {
+		return cs
+	}
+	return result
+}
+
+func ppCharsetFilter(cs string, set map[uint8]bool, allowEmpty bool) string {
+	result := ""
+	for _, chr := range cs {
+		if _, ok := set[uint8(chr)]; ok {
+			result += string(chr)
+		}
+	}
+	if result == "" && !allowEmpty {
+		return cs
+	}
+	return result
+}
+
+func PronouncablePasswordExt(rng io.Reader, pwlen int) (string, float64) {
+
+	// kinda pseudo markov-chain - with a few extra rules and no weights...
+
+	if pwlen <= 0 {
+		return "", 0
+	}
+
+	vowelCount := 0
+	consoCount := 0
+	entropy := float64(0)
+
+	startChar := ppRand(rng, ppStartChar, &entropy)
+
+	result := string(startChar)
+	currentChar := startChar
+
+	isVowel, isConsonant := ppCharType(currentChar)
+	if isVowel {
+		vowelCount = 1
+	}
+	if isConsonant {
+		consoCount = ppMaxRepeatedConsonant
+	}
+
+	segmentLen := 1
+
+	segmentLenTarget := ppSegmentLenMin + ppRandInt(rng, ppSegmentLenMax-ppSegmentLenMin)
+
+	for len(result) < pwlen {
+
+		charset := ppContinuation[currentChar]
+		if vowelCount >= ppMaxRepeatedVowel {
+			charset = ppCharsetRemove(charset, ppVowelMap, false)
+		}
+		if consoCount >= ppMaxRepeatedConsonant {
+			charset = ppCharsetRemove(charset, ppConsonantMap, false)
+		}
+
+		lastOfSegment := false
+		newSegment := false
+
+		if len(result)+1 == pwlen {
+			// last of result
+			charset = ppCharsetFilter(charset, ppEndCharMap, false)
+		} else if segmentLen+1 == segmentLenTarget {
+			// last of segment
+			charsetNew := ppCharsetFilter(charset, ppEndCharMap, true)
+			if charsetNew != "" {
+				charset = charsetNew
+				lastOfSegment = true
+			}
+		} else if segmentLen >= segmentLenTarget {
+			// (perhaps) start of new segment
+			if _, ok := ppEndCharMap[currentChar]; ok {
+				charset = ppStartChar
+				newSegment = true
+			} else {
+				// continue segment for one more char to (hopefully) find an end-char
+				charsetNew := ppCharsetFilter(charset, ppEndCharMap, true)
+				if charsetNew != "" {
+					charset = charsetNew
+					lastOfSegment = true
+				}
+			}
+		} else {
+			// normal continuation
+		}
+
+		newChar := ppRand(rng, charset, &entropy)
+		if lastOfSegment {
+			currentChar = newChar
+			segmentLen++
+			result += strings.ToLower(string(newChar))
+		} else if newSegment {
+			currentChar = newChar
+			segmentLen = 1
+			result += strings.ToUpper(string(newChar))
+			segmentLenTarget = ppSegmentLenMin + ppRandInt(rng, ppSegmentLenMax-ppSegmentLenMin)
+			vowelCount = 0
+			consoCount = 0
+		} else {
+			currentChar = newChar
+			segmentLen++
+			result += strings.ToLower(string(newChar))
+		}
+
+		isVowel, isConsonant := ppCharType(currentChar)
+		if isVowel {
+			vowelCount++
+			consoCount = 0
+		}
+		if isConsonant {
+			vowelCount = 0
+			if newSegment {
+				consoCount = ppMaxRepeatedConsonant
+			} else {
+				consoCount++
+			}
+		}
+	}
+
+	return result, entropy
+}
+
+func PronouncablePassword(len int) string {
+	v, _ := PronouncablePasswordExt(rand.Reader, len)
+	return v
+}
+
+func PronouncablePasswordSeeded(seed int64, len int) string {
+
+	v, _ := PronouncablePasswordExt(mathrand.New(mathrand.NewSource(seed)), len)
+	return v
+}

cryptext/pronouncablePassword_test.go

@@ -0,0 +1,35 @@
+package cryptext
+
+import (
+	"fmt"
+	"math/rand"
+	"testing"
+)
+
+func TestPronouncablePasswordExt(t *testing.T) {
+	for i := 0; i < 20; i++ {
+		pw, entropy := PronouncablePasswordExt(rand.New(rand.NewSource(int64(i))), 16)
+		fmt.Printf("[%.2f] => %s\n", entropy, pw)
+	}
+}
+
+func TestPronouncablePasswordSeeded(t *testing.T) {
+	for i := 0; i < 20; i++ {
+		pw := PronouncablePasswordSeeded(int64(i), 8)
+		fmt.Printf("%s\n", pw)
+	}
+}
+
+func TestPronouncablePassword(t *testing.T) {
+	for i := 0; i < 20; i++ {
+		pw := PronouncablePassword(i + 1)
+		fmt.Printf("%s\n", pw)
+	}
+}
+
+func TestPronouncablePasswordWrongLen(t *testing.T) {
+	PronouncablePassword(0)
+	PronouncablePassword(-1)
+	PronouncablePassword(-2)
+	PronouncablePassword(-3)
+}

cursortoken/filter.go

@@ -1,14 +1,15 @@
 package cursortoken
 
 import (
+	"context"
 	"go.mongodb.org/mongo-driver/mongo"
 )
 
 type RawFilter interface {
-	FilterQuery() mongo.Pipeline
+	FilterQuery(ctx context.Context) mongo.Pipeline
 }
 
 type Filter interface {
-	FilterQuery() mongo.Pipeline
+	FilterQuery(ctx context.Context) mongo.Pipeline
-	Pagination() (string, SortDirection, string, SortDirection)
+	Pagination(ctx context.Context) (string, SortDirection, string, SortDirection)
 }

dataext/casMutex.go

@@ -0,0 +1,254 @@
+package dataext
+
+import (
+	"context"
+	"golang.org/x/sync/semaphore"
+	"runtime"
+	"sync"
+	"sync/atomic"
+	"time"
+	"unsafe"
+)
+
+// from https://github.com/viney-shih/go-lock/blob/2f19fd8ce335e33e0ab9dccb1ff2ce820c3da332/cas.go
+
+// CASMutex is the struct implementing RWMutex with CAS mechanism.
+type CASMutex struct {
+	state     casState
+	turnstile *semaphore.Weighted
+
+	broadcastChan chan struct{}
+	broadcastMut  sync.RWMutex
+}
+
+func NewCASMutex() *CASMutex {
+	return &CASMutex{
+		state:         casStateNoLock,
+		turnstile:     semaphore.NewWeighted(1),
+		broadcastChan: make(chan struct{}),
+	}
+}
+
+type casState int32
+
+const (
+	casStateUndefined casState = iota - 2 // -2
+	casStateWriteLock                     // -1
+	casStateNoLock                        // 0
+	casStateReadLock                      // >= 1
+)
+
+func (m *CASMutex) getState(n int32) casState {
+	switch st := casState(n); {
+	case st == casStateWriteLock:
+		fallthrough
+	case st == casStateNoLock:
+		return st
+	case st >= casStateReadLock:
+		return casStateReadLock
+	default:
+		// actually, it should not happened.
+		return casStateUndefined
+	}
+}
+
+func (m *CASMutex) listen() <-chan struct{} {
+	m.broadcastMut.RLock()
+	defer m.broadcastMut.RUnlock()
+
+	return m.broadcastChan
+}
+
+func (m *CASMutex) broadcast() {
+	newCh := make(chan struct{})
+
+	m.broadcastMut.Lock()
+	ch := m.broadcastChan
+	m.broadcastChan = newCh
+	m.broadcastMut.Unlock()
+
+	close(ch)
+}
+
+func (m *CASMutex) tryLock(ctx context.Context) bool {
+	for {
+		broker := m.listen()
+		if atomic.CompareAndSwapInt32(
+			(*int32)(unsafe.Pointer(&m.state)),
+			int32(casStateNoLock),
+			int32(casStateWriteLock),
+		) {
+			return true
+		}
+
+		if ctx == nil {
+			return false
+		}
+
+		select {
+		case <-ctx.Done():
+			// timeout or cancellation
+			return false
+		case <-broker:
+			// waiting for signal triggered by m.broadcast() and trying again.
+		}
+	}
+}
+
+// TryLockWithContext attempts to acquire the lock, blocking until resources
+// are available or ctx is done (timeout or cancellation).
+func (m *CASMutex) TryLockWithContext(ctx context.Context) bool {
+	if err := m.turnstile.Acquire(ctx, 1); err != nil {
+		// Acquire failed due to timeout or cancellation
+		return false
+	}
+
+	defer m.turnstile.Release(1)
+
+	return m.tryLock(ctx)
+}
+
+// Lock acquires the lock.
+// If it is currently held by others, Lock will wait until it has a chance to acquire it.
+func (m *CASMutex) Lock() {
+	ctx := context.Background()
+
+	m.TryLockWithContext(ctx)
+}
+
+// TryLock attempts to acquire the lock without blocking.
+// Return false if someone is holding it now.
+func (m *CASMutex) TryLock() bool {
+	if !m.turnstile.TryAcquire(1) {
+		return false
+	}
+
+	defer m.turnstile.Release(1)
+
+	return m.tryLock(nil)
+}
+
+// TryLockWithTimeout attempts to acquire the lock within a period of time.
+// Return false if spending time is more than duration and no chance to acquire it.
+func (m *CASMutex) TryLockWithTimeout(duration time.Duration) bool {
+	ctx, cancel := context.WithTimeout(context.Background(), duration)
+	defer cancel()
+
+	return m.TryLockWithContext(ctx)
+}
+
+// Unlock releases the lock.
+func (m *CASMutex) Unlock() {
+	if ok := atomic.CompareAndSwapInt32(
+		(*int32)(unsafe.Pointer(&m.state)),
+		int32(casStateWriteLock),
+		int32(casStateNoLock),
+	); !ok {
+		panic("Unlock failed")
+	}
+
+	m.broadcast()
+}
+
+func (m *CASMutex) rTryLock(ctx context.Context) bool {
+	for {
+		broker := m.listen()
+		n := atomic.LoadInt32((*int32)(unsafe.Pointer(&m.state)))
+		st := m.getState(n)
+		switch st {
+		case casStateNoLock, casStateReadLock:
+			if atomic.CompareAndSwapInt32((*int32)(unsafe.Pointer(&m.state)), n, n+1) {
+				return true
+			}
+		}
+
+		if ctx == nil {
+			return false
+		}
+
+		select {
+		case <-ctx.Done():
+			// timeout or cancellation
+			return false
+		default:
+			switch st {
+			// read-lock failed due to concurrence issue, try again immediately
+			case casStateNoLock, casStateReadLock:
+				runtime.Gosched() // allow other goroutines to do stuff.
+				continue
+			}
+		}
+
+		select {
+		case <-ctx.Done():
+			// timeout or cancellation
+			return false
+		case <-broker:
+			// waiting for signal triggered by m.broadcast() and trying again.
+		}
+	}
+}
+
+// RTryLockWithContext attempts to acquire the read lock, blocking until resources
+// are available or ctx is done (timeout or cancellation).
+func (m *CASMutex) RTryLockWithContext(ctx context.Context) bool {
+	if err := m.turnstile.Acquire(ctx, 1); err != nil {
+		// Acquire failed due to timeout or cancellation
+		return false
+	}
+
+	m.turnstile.Release(1)
+
+	return m.rTryLock(ctx)
+}
+
+// RLock acquires the read lock.
+// If it is currently held by others writing, RLock will wait until it has a chance to acquire it.
+func (m *CASMutex) RLock() {
+	ctx := context.Background()
+
+	m.RTryLockWithContext(ctx)
+}
+
+// RTryLock attempts to acquire the read lock without blocking.
+// Return false if someone is writing it now.
+func (m *CASMutex) RTryLock() bool {
+	if !m.turnstile.TryAcquire(1) {
+		return false
+	}
+
+	m.turnstile.Release(1)
+
+	return m.rTryLock(nil)
+}
+
+// RTryLockWithTimeout attempts to acquire the read lock within a period of time.
+// Return false if spending time is more than duration and no chance to acquire it.
+func (m *CASMutex) RTryLockWithTimeout(duration time.Duration) bool {
+	ctx, cancel := context.WithTimeout(context.Background(), duration)
+	defer cancel()
+
+	return m.RTryLockWithContext(ctx)
+}
+
+// RUnlock releases the read lock.
+func (m *CASMutex) RUnlock() {
+	n := atomic.AddInt32((*int32)(unsafe.Pointer(&m.state)), -1)
+	switch m.getState(n) {
+	case casStateUndefined, casStateWriteLock:
+		panic("RUnlock failed")
+	case casStateNoLock:
+		m.broadcast()
+	}
+}
+
+// RLocker returns a Locker interface that implements the Lock and Unlock methods
+// by calling CASMutex.RLock and CASMutex.RUnlock.
+func (m *CASMutex) RLocker() sync.Locker {
+	return (*rlocker)(m)
+}
+
+type rlocker CASMutex
+
+func (r *rlocker) Lock()   { (*CASMutex)(r).RLock() }
+func (r *rlocker) Unlock() { (*CASMutex)(r).RUnlock() }

dataext/optional.go

@@ -0,0 +1,59 @@
+package dataext
+
+import (
+	"encoding/json"
+	"errors"
+)
+
+type JsonOpt[T any] struct {
+	isSet bool
+	value T
+}
+
+// MarshalJSON returns m as the JSON encoding of m.
+func (m JsonOpt[T]) MarshalJSON() ([]byte, error) {
+	if !m.isSet {
+		return []byte("null"), nil // actually this would be undefined - but undefined is not valid JSON
+	}
+
+	return json.Marshal(m.value)
+}
+
+// UnmarshalJSON sets *m to a copy of data.
+func (m *JsonOpt[T]) UnmarshalJSON(data []byte) error {
+	if m == nil {
+		return errors.New("JsonOpt: UnmarshalJSON on nil pointer")
+	}
+
+	m.isSet = true
+	return json.Unmarshal(data, &m.value)
+}
+
+func (m JsonOpt[T]) IsSet() bool {
+	return m.isSet
+}
+
+func (m JsonOpt[T]) IsUnset() bool {
+	return !m.isSet
+}
+
+func (m JsonOpt[T]) Value() (T, bool) {
+	if !m.isSet {
+		return *new(T), false
+	}
+	return m.value, true
+}
+
+func (m JsonOpt[T]) ValueOrNil() *T {
+	if !m.isSet {
+		return nil
+	}
+	return &m.value
+}
+
+func (m JsonOpt[T]) MustValue() T {
+	if !m.isSet {
+		panic("value not set")
+	}
+	return m.value
+}

dataext/syncMap.go

@@ -0,0 +1,163 @@
+package dataext
+
+import "sync"
+
+type SyncMap[TKey comparable, TData any] struct {
+	data map[TKey]TData
+	lock sync.Mutex
+}
+
+func (s *SyncMap[TKey, TData]) Set(key TKey, data TData) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if s.data == nil {
+		s.data = make(map[TKey]TData)
+	}
+
+	s.data[key] = data
+}
+
+func (s *SyncMap[TKey, TData]) SetIfNotContains(key TKey, data TData) bool {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if s.data == nil {
+		s.data = make(map[TKey]TData)
+	}
+
+	if _, existsInPreState := s.data[key]; existsInPreState {
+		return false
+	}
+
+	s.data[key] = data
+
+	return true
+}
+
+func (s *SyncMap[TKey, TData]) SetIfNotContainsFunc(key TKey, data func() TData) bool {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if s.data == nil {
+		s.data = make(map[TKey]TData)
+	}
+
+	if _, existsInPreState := s.data[key]; existsInPreState {
+		return false
+	}
+
+	s.data[key] = data()
+
+	return true
+}
+
+func (s *SyncMap[TKey, TData]) Get(key TKey) (TData, bool) {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if s.data == nil {
+		s.data = make(map[TKey]TData)
+	}
+
+	if v, ok := s.data[key]; ok {
+		return v, true
+	} else {
+		return *new(TData), false
+	}
+}
+
+func (s *SyncMap[TKey, TData]) GetAndSetIfNotContains(key TKey, data TData) TData {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if s.data == nil {
+		s.data = make(map[TKey]TData)
+	}
+
+	if v, ok := s.data[key]; ok {
+		return v
+	} else {
+		s.data[key] = data
+		return data
+	}
+}
+
+func (s *SyncMap[TKey, TData]) GetAndSetIfNotContainsFunc(key TKey, data func() TData) TData {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if s.data == nil {
+		s.data = make(map[TKey]TData)
+	}
+
+	if v, ok := s.data[key]; ok {
+		return v
+	} else {
+		dataObj := data()
+		s.data[key] = dataObj
+		return dataObj
+	}
+}
+
+func (s *SyncMap[TKey, TData]) Delete(key TKey) bool {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if s.data == nil {
+		s.data = make(map[TKey]TData)
+	}
+
+	_, ok := s.data[key]
+
+	delete(s.data, key)
+
+	return ok
+}
+
+func (s *SyncMap[TKey, TData]) Contains(key TKey) bool {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if s.data == nil {
+		s.data = make(map[TKey]TData)
+	}
+
+	_, ok := s.data[key]
+
+	return ok
+}
+
+func (s *SyncMap[TKey, TData]) GetAllKeys() []TKey {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if s.data == nil {
+		s.data = make(map[TKey]TData)
+	}
+
+	r := make([]TKey, 0, len(s.data))
+
+	for k := range s.data {
+		r = append(r, k)
+	}
+
+	return r
+}
+
+func (s *SyncMap[TKey, TData]) GetAllValues() []TData {
+	s.lock.Lock()
+	defer s.lock.Unlock()
+
+	if s.data == nil {
+		s.data = make(map[TKey]TData)
+	}
+
+	r := make([]TData, 0, len(s.data))
+
+	for _, v := range s.data {
+		r = append(r, v)
+	}
+
+	return r
+}

enums/enum.go

@@ -5,6 +5,8 @@ type Enum interface {
 	ValuesAny() []any
 	ValuesMeta() []EnumMetaValue
 	VarName() string
+	TypeName() string
+	PackageName() string
 }
 
 type StringEnum interface {

exerr/builder.go

@@ -55,22 +55,12 @@ import (
 //     => Wrap/New + Fatal
 //
 
-var stackSkipLogger zerolog.Logger
-
-func init() {
-	cw := zerolog.ConsoleWriter{
-		Out:        os.Stdout,
-		TimeFormat: "2006-01-02 15:04:05 Z07:00",
-	}
-
-	multi := zerolog.MultiLevelWriter(cw)
-	stackSkipLogger = zerolog.New(multi).With().Timestamp().CallerWithSkipFrameCount(4).Logger()
-}
-
 type Builder struct {
-	errorData       *ExErr
+	wrappedErr          error
-	containsGinData bool
+	errorData           *ExErr
-	noLog           bool
+	containsGinData     bool
+	containsContextData bool
+	noLog               bool
 }
 
 func Get(err error) *Builder {
@@ -89,9 +79,9 @@ func Wrap(err error, msg string) *Builder {
 	if !pkgconfig.RecursiveErrors {
 		v := FromError(err)
 		v.Message = msg
-		return &Builder{errorData: v}
+		return &Builder{wrappedErr: err, errorData: v}
 	}
-	return &Builder{errorData: wrapExErr(FromError(err), msg, CatWrap, 1)}
+	return &Builder{wrappedErr: err, errorData: wrapExErr(FromError(err), msg, CatWrap, 1)}
 }
 
 // ----------------------------------------------------------------------------
@@ -308,27 +298,27 @@ func (b *Builder) Errs(key string, val []error) *Builder {
 func (b *Builder) GinReq(ctx context.Context, g *gin.Context, req *http.Request) *Builder {
 	if v := ctx.Value("start_timestamp"); v != nil {
 		if t, ok := v.(time.Time); ok {
-			b.Time("ctx.startTimestamp", t)
+			b.Time("ctx_startTimestamp", t)
-			b.Time("ctx.endTimestamp", time.Now())
+			b.Time("ctx_endTimestamp", time.Now())
 		}
 	}
-	b.Str("gin.method", req.Method)
+	b.Str("gin_method", req.Method)
-	b.Str("gin.path", g.FullPath())
+	b.Str("gin_path", g.FullPath())
-	b.Strs("gin.header", extractHeader(g.Request.Header))
+	b.Strs("gin_header", extractHeader(g.Request.Header))
 	if req.URL != nil {
-		b.Str("gin.url", req.URL.String())
+		b.Str("gin_url", req.URL.String())
 	}
 	if ctxVal := g.GetString("apiversion"); ctxVal != "" {
-		b.Str("gin.context.apiversion", ctxVal)
+		b.Str("gin_context_apiversion", ctxVal)
 	}
 	if ctxVal := g.GetString("uid"); ctxVal != "" {
-		b.Str("gin.context.uid", ctxVal)
+		b.Str("gin_context_uid", ctxVal)
 	}
 	if ctxVal := g.GetString("fcmId"); ctxVal != "" {
-		b.Str("gin.context.fcmid", ctxVal)
+		b.Str("gin_context_fcmid", ctxVal)
 	}
 	if ctxVal := g.GetString("reqid"); ctxVal != "" {
-		b.Str("gin.context.reqid", ctxVal)
+		b.Str("gin_context_reqid", ctxVal)
 	}
 	if req.Method != "GET" && req.Body != nil {
 
@@ -339,12 +329,12 @@ func (b *Builder) GinReq(ctx context.Context, g *gin.Context, req *http.Request)
 						var prettyJSON bytes.Buffer
 						err = json.Indent(&prettyJSON, bin, "", "  ")
 						if err == nil {
-							b.Str("gin.body", string(prettyJSON.Bytes()))
+							b.Str("gin_body", string(prettyJSON.Bytes()))
 						} else {
-							b.Bytes("gin.body", bin)
+							b.Bytes("gin_body", bin)
 						}
 					} else {
-						b.Str("gin.body", fmt.Sprintf("[[%v bytes | %s]]", len(bin), req.Header.Get("Content-Type")))
+						b.Str("gin_body", fmt.Sprintf("[[%v bytes | %s]]", len(bin), req.Header.Get("Content-Type")))
 					}
 				}
 			}
@@ -354,9 +344,9 @@ func (b *Builder) GinReq(ctx context.Context, g *gin.Context, req *http.Request)
 			if brc, ok := req.Body.(dataext.BufferedReadCloser); ok {
 				if bin, err := brc.BufferedAll(); err == nil {
 					if len(bin) < 16*1024 {
-						b.Bytes("gin.body", bin)
+						b.Bytes("gin_body", bin)
 					} else {
-						b.Str("gin.body", fmt.Sprintf("[[%v bytes | %s]]", len(bin), req.Header.Get("Content-Type")))
+						b.Str("gin_body", fmt.Sprintf("[[%v bytes | %s]]", len(bin), req.Header.Get("Content-Type")))
 					}
 				}
 			}
@@ -364,10 +354,20 @@ func (b *Builder) GinReq(ctx context.Context, g *gin.Context, req *http.Request)
 
 	}
 
+	pkgconfig.ExtendGinMeta(ctx, b, g, req)
+
 	b.containsGinData = true
 	return b
 }
 
+func (b *Builder) CtxData(method Method, ctx context.Context) *Builder {
+	pkgconfig.ExtendContextMeta(b, method, ctx)
+
+	b.containsContextData = true
+
+	return b
+}
+
 func formatHeader(header map[string][]string) string {
 	ml := 1
 	for k, _ := range header {
@@ -411,16 +411,24 @@ func extractHeader(header map[string][]string) []string {
 // If the errors is not SevWarn or SevInfo it gets also logged (in short form, without stacktrace) onto stdout
 // Can be gloablly configured with ZeroLogErrTraces and ZeroLogAllTraces
 // Can be locally suppressed with Builder.NoLog()
-func (b *Builder) Build() error {
+func (b *Builder) Build(ctxs ...context.Context) error {
 	warnOnPkgConfigNotInitialized()
 
-	if pkgconfig.ZeroLogErrTraces && !b.noLog && (b.errorData.Severity == SevErr || b.errorData.Severity == SevFatal) {
+	for _, dctx := range ctxs {
-		b.errorData.ShortLog(stackSkipLogger.Error())
+		b.CtxData(MethodBuild, dctx)
-	} else if pkgconfig.ZeroLogAllTraces && !b.noLog {
-		b.errorData.ShortLog(stackSkipLogger.Error())
 	}
 
-	b.CallListener(MethodBuild)
+	if pkgconfig.DisableErrorWrapping && b.wrappedErr != nil {
+		return b.wrappedErr
+	}
+
+	if pkgconfig.ZeroLogErrTraces && !b.noLog && (b.errorData.Severity == SevErr || b.errorData.Severity == SevFatal) {
+		b.errorData.ShortLog(pkgconfig.ZeroLogger.Error())
+	} else if pkgconfig.ZeroLogAllTraces && !b.noLog {
+		b.errorData.ShortLog(pkgconfig.ZeroLogger.Error())
+	}
+
+	b.errorData.CallListener(MethodBuild)
 
 	return b.errorData
 }
@@ -434,27 +442,35 @@ func (b *Builder) Output(ctx context.Context, g *gin.Context) {
 		b.GinReq(ctx, g, g.Request)
 	}
 
+	b.CtxData(MethodOutput, ctx)
+
 	b.errorData.Output(g)
 
-	if b.errorData.Severity == SevErr || b.errorData.Severity == SevFatal {
+	if (b.errorData.Severity == SevErr || b.errorData.Severity == SevFatal) && (pkgconfig.ZeroLogErrGinOutput || pkgconfig.ZeroLogAllGinOutput) {
-		b.errorData.Log(stackSkipLogger.Error())
+		b.errorData.Log(pkgconfig.ZeroLogger.Error())
-	} else if b.errorData.Severity == SevWarn {
+	} else if (b.errorData.Severity == SevWarn) && (pkgconfig.ZeroLogAllGinOutput) {
-		b.errorData.Log(stackSkipLogger.Warn())
+		b.errorData.Log(pkgconfig.ZeroLogger.Warn())
 	}
 
-	b.CallListener(MethodOutput)
+	b.errorData.CallListener(MethodOutput)
 }
 
 // Print prints the error
 // If the error is SevErr we also send it to the error-service
-func (b *Builder) Print() {
+func (b *Builder) Print(ctxs ...context.Context) {
-	if b.errorData.Severity == SevErr || b.errorData.Severity == SevFatal {
+	warnOnPkgConfigNotInitialized()
-		b.errorData.Log(stackSkipLogger.Error())
+
-	} else if b.errorData.Severity == SevWarn {
+	for _, dctx := range ctxs {
-		b.errorData.ShortLog(stackSkipLogger.Warn())
+		b.CtxData(MethodPrint, dctx)
 	}
 
-	b.CallListener(MethodPrint)
+	if b.errorData.Severity == SevErr || b.errorData.Severity == SevFatal {
+		b.errorData.Log(pkgconfig.ZeroLogger.Error())
+	} else if b.errorData.Severity == SevWarn {
+		b.errorData.ShortLog(pkgconfig.ZeroLogger.Warn())
+	}
+
+	b.errorData.CallListener(MethodPrint)
 }
 
 func (b *Builder) Format(level LogPrintLevel) string {
@@ -463,11 +479,17 @@ func (b *Builder) Format(level LogPrintLevel) string {
 
 // Fatal prints the error and terminates the program
 // If the error is SevErr we also send it to the error-service
-func (b *Builder) Fatal() {
+func (b *Builder) Fatal(ctxs ...context.Context) {
-	b.errorData.Severity = SevFatal
-	b.errorData.Log(stackSkipLogger.WithLevel(zerolog.FatalLevel))
 
-	b.CallListener(MethodFatal)
+	b.errorData.Severity = SevFatal
+
+	for _, dctx := range ctxs {
+		b.CtxData(MethodFatal, dctx)
+	}
+
+	b.errorData.Log(pkgconfig.ZeroLogger.WithLevel(zerolog.FatalLevel))
+
+	b.errorData.CallListener(MethodFatal)
 
 	os.Exit(1)
 }

exerr/constructor.go

@@ -56,7 +56,7 @@ func wrapExErr(e *ExErr, msg string, cat ErrorCategory, stacktraceskip int) *ExE
 		UniqueID:       newID(),
 		Category:       cat,
 		Type:           TypeWrap,
-		Severity:       SevErr,
+		Severity:       e.Severity,
 		Timestamp:      time.Now(),
 		StatusCode:     e.StatusCode,
 		Message:        msg,
@@ -181,7 +181,7 @@ func getReflectedMetaValues(value interface{}, remainingDepth int) map[string]Me
 
 	jsonval, err := json.Marshal(value)
 	if err != nil {
-		panic(err) // gets recovered later up
+		return map[string]MetaValue{"": {DataType: MDTString, Value: fmt.Sprintf("Failed to Marshal %T:\n%+v", value, value)}}
 	}
 
 	return map[string]MetaValue{"": {DataType: MDTString, Value: string(jsonval)}}

exerr/data.go

@@ -1,84 +1,14 @@
 package exerr
 
-import (
+type Method string
-	"gogs.mikescher.com/BlackForestBytes/goext/dataext"
+
-	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+const (
+	MethodOutput Method = "OUTPUT"
+	MethodPrint  Method = "PRINT"
+	MethodBuild  Method = "BUILD"
+	MethodFatal  Method = "FATAL"
 )
 
-type ErrorCategory struct{ Category string }
-
-var (
-	CatWrap    = ErrorCategory{"Wrap"}    // The error is simply wrapping another error (e.g. when a grpc call returns an error)
-	CatSystem  = ErrorCategory{"System"}  // An internal system error (e.g. connection to db failed)
-	CatUser    = ErrorCategory{"User"}    // The user (the API caller) did something wrong (e.g. he has no permissions to do this)
-	CatForeign = ErrorCategory{"Foreign"} // A foreign error that some component threw (e.g. an unknown mongodb error), happens if we call Wrap(..) on an non-bmerror value
-)
-
-//goland:noinspection GoUnusedGlobalVariable
-var AllCategories = []ErrorCategory{CatWrap, CatSystem, CatUser, CatForeign}
-
-type ErrorSeverity struct{ Severity string }
-
-var (
-	SevTrace = ErrorSeverity{"Trace"}
-	SevDebug = ErrorSeverity{"Debug"}
-	SevInfo  = ErrorSeverity{"Info"}
-	SevWarn  = ErrorSeverity{"Warn"}
-	SevErr   = ErrorSeverity{"Err"}
-	SevFatal = ErrorSeverity{"Fatal"}
-)
-
-//goland:noinspection GoUnusedGlobalVariable
-var AllSeverities = []ErrorSeverity{SevTrace, SevDebug, SevInfo, SevWarn, SevErr, SevFatal}
-
-type ErrorType struct {
-	Key               string
-	DefaultStatusCode *int
-}
-
-//goland:noinspection GoUnusedGlobalVariable
-var (
-	TypeInternal       = NewType("INTERNAL_ERROR", langext.Ptr(500))
-	TypePanic          = NewType("PANIC", langext.Ptr(500))
-	TypeNotImplemented = NewType("NOT_IMPLEMENTED", langext.Ptr(500))
-
-	TypeMongoQuery        = NewType("MONGO_QUERY", langext.Ptr(500))
-	TypeCursorTokenDecode = NewType("CURSOR_TOKEN_DECODE", langext.Ptr(500))
-	TypeMongoFilter       = NewType("MONGO_FILTER", langext.Ptr(500))
-	TypeMongoReflection   = NewType("MONGO_REFLECTION", langext.Ptr(500))
-	TypeMongoInvalidOpt   = NewType("MONGO_INVALIDOPT", langext.Ptr(500))
-
-	TypeWrap = NewType("Wrap", nil)
-
-	TypeBindFailURI      = NewType("BINDFAIL_URI", langext.Ptr(400))
-	TypeBindFailQuery    = NewType("BINDFAIL_QUERY", langext.Ptr(400))
-	TypeBindFailJSON     = NewType("BINDFAIL_JSON", langext.Ptr(400))
-	TypeBindFailFormData = NewType("BINDFAIL_FORMDATA", langext.Ptr(400))
-	TypeBindFailHeader   = NewType("BINDFAIL_HEADER", langext.Ptr(400))
-
-	TypeMarshalEntityID = NewType("MARSHAL_ENTITY_ID", langext.Ptr(400))
-	TypeInvalidCSID     = NewType("INVALID_CSID", langext.Ptr(400))
-
-	TypeGoogleStatuscode = NewType("GOOGLE_STATUSCODE", langext.Ptr(400))
-	TypeGoogleResponse   = NewType("GOOGLE_RESPONSE", langext.Ptr(400))
-
-	TypeUnauthorized = NewType("UNAUTHORIZED", langext.Ptr(401))
-	TypeAuthFailed   = NewType("AUTH_FAILED", langext.Ptr(401))
-
-	// other values come the used package
-)
-
-var registeredTypes = dataext.SyncSet[string]{}
-
-func NewType(key string, defStatusCode *int) ErrorType {
-	insertOkay := registeredTypes.Add(key)
-	if !insertOkay {
-		panic("Cannot register same ErrType ('" + key + "') more than once")
-	}
-
-	return ErrorType{key, defStatusCode}
-}
-
 type LogPrintLevel string
 
 const (

exerr/dataCategory.go

@@ -0,0 +1,89 @@
+package exerr
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/bson/bsoncodec"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"reflect"
+)
+
+type ErrorCategory struct{ Category string }
+
+var (
+	CatWrap    = ErrorCategory{"Wrap"}    // The error is simply wrapping another error (e.g. when a grpc call returns an error)
+	CatSystem  = ErrorCategory{"System"}  // An internal system error (e.g. connection to db failed)
+	CatUser    = ErrorCategory{"User"}    // The user (the API caller) did something wrong (e.g. he has no permissions to do this)
+	CatForeign = ErrorCategory{"Foreign"} // A foreign error that some component threw (e.g. an unknown mongodb error), happens if we call Wrap(..) on an non-bmerror value
+)
+
+func (e *ErrorCategory) UnmarshalJSON(bytes []byte) error {
+	return json.Unmarshal(bytes, &e.Category)
+}
+
+func (e ErrorCategory) MarshalJSON() ([]byte, error) {
+	return json.Marshal(e.Category)
+}
+
+func (e *ErrorCategory) UnmarshalBSONValue(bt bsontype.Type, data []byte) error {
+	if bt == bson.TypeNull {
+		// we can't set nil in UnmarshalBSONValue (so we use default(struct))
+		// Use mongoext.CreateGoExtBsonRegistry if you need to unmarsh pointer values
+		// https://stackoverflow.com/questions/75167597
+		// https://jira.mongodb.org/browse/GODRIVER-2252
+		*e = ErrorCategory{}
+		return nil
+	}
+	if bt != bson.TypeString {
+		return errors.New(fmt.Sprintf("cannot unmarshal %v into String", bt))
+	}
+	var tt string
+	err := bson.RawValue{Type: bt, Value: data}.Unmarshal(&tt)
+	if err != nil {
+		return err
+	}
+	*e = ErrorCategory{tt}
+	return nil
+}
+
+func (e ErrorCategory) MarshalBSONValue() (bsontype.Type, []byte, error) {
+	return bson.MarshalValue(e.Category)
+}
+
+func (e ErrorCategory) DecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if val.Kind() == reflect.Ptr && val.IsNil() {
+		if !val.CanSet() {
+			return errors.New("ValueUnmarshalerDecodeValue")
+		}
+		val.Set(reflect.New(val.Type().Elem()))
+	}
+
+	tp, src, err := bsonrw.Copier{}.CopyValueToBytes(vr)
+	if err != nil {
+		return err
+	}
+
+	if val.Kind() == reflect.Ptr && len(src) == 0 {
+		val.Set(reflect.Zero(val.Type()))
+		return nil
+	}
+
+	err = e.UnmarshalBSONValue(tp, src)
+	if err != nil {
+		return err
+	}
+
+	if val.Kind() == reflect.Ptr {
+		val.Set(reflect.ValueOf(&e))
+	} else {
+		val.Set(reflect.ValueOf(e))
+	}
+
+	return nil
+}
+
+//goland:noinspection GoUnusedGlobalVariable
+var AllCategories = []ErrorCategory{CatWrap, CatSystem, CatUser, CatForeign}

exerr/dataSeverity.go

@@ -0,0 +1,91 @@
+package exerr
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/bson/bsoncodec"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"reflect"
+)
+
+type ErrorSeverity struct{ Severity string }
+
+var (
+	SevTrace = ErrorSeverity{"Trace"}
+	SevDebug = ErrorSeverity{"Debug"}
+	SevInfo  = ErrorSeverity{"Info"}
+	SevWarn  = ErrorSeverity{"Warn"}
+	SevErr   = ErrorSeverity{"Err"}
+	SevFatal = ErrorSeverity{"Fatal"}
+)
+
+func (e *ErrorSeverity) UnmarshalJSON(bytes []byte) error {
+	return json.Unmarshal(bytes, &e.Severity)
+}
+
+func (e ErrorSeverity) MarshalJSON() ([]byte, error) {
+	return json.Marshal(e.Severity)
+}
+
+func (e *ErrorSeverity) UnmarshalBSONValue(bt bsontype.Type, data []byte) error {
+	if bt == bson.TypeNull {
+		// we can't set nil in UnmarshalBSONValue (so we use default(struct))
+		// Use mongoext.CreateGoExtBsonRegistry if you need to unmarsh pointer values
+		// https://stackoverflow.com/questions/75167597
+		// https://jira.mongodb.org/browse/GODRIVER-2252
+		*e = ErrorSeverity{}
+		return nil
+	}
+	if bt != bson.TypeString {
+		return errors.New(fmt.Sprintf("cannot unmarshal %v into String", bt))
+	}
+	var tt string
+	err := bson.RawValue{Type: bt, Value: data}.Unmarshal(&tt)
+	if err != nil {
+		return err
+	}
+	*e = ErrorSeverity{tt}
+	return nil
+}
+
+func (e ErrorSeverity) MarshalBSONValue() (bsontype.Type, []byte, error) {
+	return bson.MarshalValue(e.Severity)
+}
+
+func (e ErrorSeverity) DecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if val.Kind() == reflect.Ptr && val.IsNil() {
+		if !val.CanSet() {
+			return errors.New("ValueUnmarshalerDecodeValue")
+		}
+		val.Set(reflect.New(val.Type().Elem()))
+	}
+
+	tp, src, err := bsonrw.Copier{}.CopyValueToBytes(vr)
+	if err != nil {
+		return err
+	}
+
+	if val.Kind() == reflect.Ptr && len(src) == 0 {
+		val.Set(reflect.Zero(val.Type()))
+		return nil
+	}
+
+	err = e.UnmarshalBSONValue(tp, src)
+	if err != nil {
+		return err
+	}
+
+	if val.Kind() == reflect.Ptr {
+		val.Set(reflect.ValueOf(&e))
+	} else {
+		val.Set(reflect.ValueOf(e))
+	}
+
+	return nil
+}
+
+//goland:noinspection GoUnusedGlobalVariable
+var AllSeverities = []ErrorSeverity{SevTrace, SevDebug, SevInfo, SevWarn, SevErr, SevFatal}

exerr/dataType.go

@@ -0,0 +1,155 @@
+package exerr
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/bson/bsoncodec"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"gogs.mikescher.com/BlackForestBytes/goext/dataext"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"reflect"
+)
+
+type ErrorType struct {
+	Key               string
+	DefaultStatusCode *int
+}
+
+//goland:noinspection GoUnusedGlobalVariable
+var (
+	TypeInternal       = NewType("INTERNAL_ERROR", langext.Ptr(500))
+	TypePanic          = NewType("PANIC", langext.Ptr(500))
+	TypeNotImplemented = NewType("NOT_IMPLEMENTED", langext.Ptr(500))
+
+	TypeMongoQuery        = NewType("MONGO_QUERY", langext.Ptr(500))
+	TypeCursorTokenDecode = NewType("CURSOR_TOKEN_DECODE", langext.Ptr(500))
+	TypeMongoFilter       = NewType("MONGO_FILTER", langext.Ptr(500))
+	TypeMongoReflection   = NewType("MONGO_REFLECTION", langext.Ptr(500))
+	TypeMongoInvalidOpt   = NewType("MONGO_INVALIDOPT", langext.Ptr(500))
+
+	TypeSQLQuery  = NewType("SQL_QUERY", langext.Ptr(500))
+	TypeSQLBuild  = NewType("SQL_BUILD", langext.Ptr(500))
+	TypeSQLDecode = NewType("SQL_DECODE", langext.Ptr(500))
+
+	TypeWrap = NewType("Wrap", nil)
+
+	TypeBindFailURI      = NewType("BINDFAIL_URI", langext.Ptr(400))
+	TypeBindFailQuery    = NewType("BINDFAIL_QUERY", langext.Ptr(400))
+	TypeBindFailJSON     = NewType("BINDFAIL_JSON", langext.Ptr(400))
+	TypeBindFailFormData = NewType("BINDFAIL_FORMDATA", langext.Ptr(400))
+	TypeBindFailHeader   = NewType("BINDFAIL_HEADER", langext.Ptr(400))
+
+	TypeMarshalEntityID = NewType("MARSHAL_ENTITY_ID", langext.Ptr(400))
+	TypeInvalidCSID     = NewType("INVALID_CSID", langext.Ptr(400))
+
+	TypeGoogleStatuscode = NewType("GOOGLE_STATUSCODE", langext.Ptr(400))
+	TypeGoogleResponse   = NewType("GOOGLE_RESPONSE", langext.Ptr(400))
+
+	TypeUnauthorized = NewType("UNAUTHORIZED", langext.Ptr(401))
+	TypeAuthFailed   = NewType("AUTH_FAILED", langext.Ptr(401))
+
+	TypeInvalidImage    = NewType("IMAGEEXT_INVALID_IMAGE", langext.Ptr(400))
+	TypeInvalidMimeType = NewType("IMAGEEXT_INVALID_MIMETYPE", langext.Ptr(400))
+
+	// other values come from the downstream application that uses goext
+)
+
+func (e *ErrorType) UnmarshalJSON(bytes []byte) error {
+	var k string
+	err := json.Unmarshal(bytes, &k)
+	if err != nil {
+		return err
+	}
+
+	if d, ok := registeredTypes.Get(k); ok {
+		*e = d
+		return nil
+	} else {
+		*e = ErrorType{k, nil}
+		return nil
+	}
+}
+
+func (e ErrorType) MarshalJSON() ([]byte, error) {
+	return json.Marshal(e.Key)
+}
+
+func (e *ErrorType) UnmarshalBSONValue(bt bsontype.Type, data []byte) error {
+	if bt == bson.TypeNull {
+		// we can't set nil in UnmarshalBSONValue (so we use default(struct))
+		// Use mongoext.CreateGoExtBsonRegistry if you need to unmarsh pointer values
+		// https://stackoverflow.com/questions/75167597
+		// https://jira.mongodb.org/browse/GODRIVER-2252
+		*e = ErrorType{}
+		return nil
+	}
+	if bt != bson.TypeString {
+		return errors.New(fmt.Sprintf("cannot unmarshal %v into String", bt))
+	}
+	var tt string
+	err := bson.RawValue{Type: bt, Value: data}.Unmarshal(&tt)
+	if err != nil {
+		return err
+	}
+
+	if d, ok := registeredTypes.Get(tt); ok {
+		*e = d
+		return nil
+	} else {
+		*e = ErrorType{tt, nil}
+		return nil
+	}
+}
+
+func (e ErrorType) MarshalBSONValue() (bsontype.Type, []byte, error) {
+	return bson.MarshalValue(e.Key)
+}
+
+func (e ErrorType) DecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
+	if val.Kind() == reflect.Ptr && val.IsNil() {
+		if !val.CanSet() {
+			return errors.New("ValueUnmarshalerDecodeValue")
+		}
+		val.Set(reflect.New(val.Type().Elem()))
+	}
+
+	tp, src, err := bsonrw.Copier{}.CopyValueToBytes(vr)
+	if err != nil {
+		return err
+	}
+
+	if val.Kind() == reflect.Ptr && len(src) == 0 {
+		val.Set(reflect.Zero(val.Type()))
+		return nil
+	}
+
+	err = e.UnmarshalBSONValue(tp, src)
+	if err != nil {
+		return err
+	}
+
+	if val.Kind() == reflect.Ptr {
+		val.Set(reflect.ValueOf(&e))
+	} else {
+		val.Set(reflect.ValueOf(e))
+	}
+
+	return nil
+}
+
+var registeredTypes = dataext.SyncMap[string, ErrorType]{}
+
+func NewType(key string, defStatusCode *int) ErrorType {
+	et := ErrorType{key, defStatusCode}
+
+	registeredTypes.Set(key, et)
+
+	return et
+}
+
+func ListRegisteredTypes() []ErrorType {
+	return registeredTypes.GetAllValues()
+}

exerr/data_test.go

@@ -0,0 +1,153 @@
+package exerr
+
+import (
+	"context"
+	"encoding/json"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"go.mongodb.org/mongo-driver/mongo"
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
+	"testing"
+	"time"
+)
+
+func TestJSONMarshalErrorCategory(t *testing.T) {
+
+	c1 := CatSystem
+
+	jsonbin := tst.Must(json.Marshal(c1))(t)
+
+	var c2 ErrorCategory
+	tst.AssertNoErr(t, json.Unmarshal(jsonbin, &c2))
+
+	tst.AssertEqual(t, c1, c2)
+
+	tst.AssertEqual(t, string(jsonbin), "\"System\"")
+}
+
+func TestJSONMarshalErrorSeverity(t *testing.T) {
+
+	c1 := SevErr
+
+	jsonbin := tst.Must(json.Marshal(c1))(t)
+
+	var c2 ErrorSeverity
+	tst.AssertNoErr(t, json.Unmarshal(jsonbin, &c2))
+
+	tst.AssertEqual(t, c1, c2)
+
+	tst.AssertEqual(t, string(jsonbin), "\"Err\"")
+}
+
+func TestJSONMarshalErrorType(t *testing.T) {
+
+	c1 := TypeNotImplemented
+
+	jsonbin := tst.Must(json.Marshal(c1))(t)
+
+	var c2 ErrorType
+	tst.AssertNoErr(t, json.Unmarshal(jsonbin, &c2))
+
+	tst.AssertEqual(t, c1, c2)
+
+	tst.AssertEqual(t, string(jsonbin), "\"NOT_IMPLEMENTED\"")
+}
+
+func TestBSONMarshalErrorCategory(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), 350*time.Millisecond)
+	defer cancel()
+
+	client, err := mongo.Connect(ctx)
+	if err != nil {
+		t.Skip("Skip test - no local mongo found")
+		return
+	}
+	err = client.Ping(ctx, nil)
+	if err != nil {
+		t.Skip("Skip test - no local mongo found")
+		return
+	}
+
+	primimd := primitive.NewObjectID()
+
+	_, err = client.Database("_test").Collection("goext-cicd").InsertOne(ctx, bson.M{"_id": primimd, "val": CatSystem})
+	tst.AssertNoErr(t, err)
+
+	cursor := client.Database("_test").Collection("goext-cicd").FindOne(ctx, bson.M{"_id": primimd, "val": bson.M{"$type": "string"}})
+
+	var c1 struct {
+		ID  primitive.ObjectID `bson:"_id"`
+		Val ErrorCategory      `bson:"val"`
+	}
+
+	err = cursor.Decode(&c1)
+	tst.AssertNoErr(t, err)
+
+	tst.AssertEqual(t, c1.Val, CatSystem)
+}
+
+func TestBSONMarshalErrorSeverity(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), 350*time.Millisecond)
+	defer cancel()
+
+	client, err := mongo.Connect(ctx)
+	if err != nil {
+		t.Skip("Skip test - no local mongo found")
+		return
+	}
+	err = client.Ping(ctx, nil)
+	if err != nil {
+		t.Skip("Skip test - no local mongo found")
+		return
+	}
+
+	primimd := primitive.NewObjectID()
+
+	_, err = client.Database("_test").Collection("goext-cicd").InsertOne(ctx, bson.M{"_id": primimd, "val": SevErr})
+	tst.AssertNoErr(t, err)
+
+	cursor := client.Database("_test").Collection("goext-cicd").FindOne(ctx, bson.M{"_id": primimd, "val": bson.M{"$type": "string"}})
+
+	var c1 struct {
+		ID  primitive.ObjectID `bson:"_id"`
+		Val ErrorSeverity      `bson:"val"`
+	}
+
+	err = cursor.Decode(&c1)
+	tst.AssertNoErr(t, err)
+
+	tst.AssertEqual(t, c1.Val, SevErr)
+}
+
+func TestBSONMarshalErrorType(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), 350*time.Millisecond)
+	defer cancel()
+
+	client, err := mongo.Connect(ctx)
+	if err != nil {
+		t.Skip("Skip test - no local mongo found")
+		return
+	}
+	err = client.Ping(ctx, nil)
+	if err != nil {
+		t.Skip("Skip test - no local mongo found")
+		return
+	}
+
+	primimd := primitive.NewObjectID()
+
+	_, err = client.Database("_test").Collection("goext-cicd").InsertOne(ctx, bson.M{"_id": primimd, "val": TypeNotImplemented})
+	tst.AssertNoErr(t, err)
+
+	cursor := client.Database("_test").Collection("goext-cicd").FindOne(ctx, bson.M{"_id": primimd, "val": bson.M{"$type": "string"}})
+
+	var c1 struct {
+		ID  primitive.ObjectID `bson:"_id"`
+		Val ErrorType          `bson:"val"`
+	}
+
+	err = cursor.Decode(&c1)
+	tst.AssertNoErr(t, err)
+
+	tst.AssertEqual(t, c1.Val, TypeNotImplemented)
+}

exerr/errinit.go

@@ -1,18 +1,29 @@
 package exerr
 
 import (
+	"context"
 	"fmt"
+	"github.com/gin-gonic/gin"
+	"github.com/rs/zerolog"
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"net/http"
+	"os"
 )
 
 type ErrorPackageConfig struct {
-	ZeroLogErrTraces       bool                                             // autom print zerolog logs on .Build()  (for SevErr and SevFatal)
+	ZeroLogErrTraces       bool                                                                     // autom print zerolog logs on .Build()  (for SevErr and SevFatal)
-	ZeroLogAllTraces       bool                                             // autom print zerolog logs on .Build()  (for all Severities)
+	ZeroLogAllTraces       bool                                                                     // autom print zerolog logs on .Build()  (for all Severities)
-	RecursiveErrors        bool                                             // errors contains their Origin-Error
+	RecursiveErrors        bool                                                                     // errors contains their Origin-Error
-	ExtendedGinOutput      bool                                             // Log extended data (trace, meta, ...) to gin in err.Output()
+	ExtendedGinOutput      bool                                                                     // Log extended data (trace, meta, ...) to gin in err.Output()
-	IncludeMetaInGinOutput bool                                             // Log meta fields ( from e.g. `.Str(key, val).Build()` ) to gin in err.Output()
+	IncludeMetaInGinOutput bool                                                                     // Log meta fields ( from e.g. `.Str(key, val).Build()` ) to gin in err.Output()
-	ExtendGinOutput        func(err *ExErr, json map[string]any)            // (Optionally) extend the gin output with more fields
+	ExtendGinOutput        func(err *ExErr, json map[string]any)                                    // (Optionally) extend the gin output with more fields
-	ExtendGinDataOutput    func(err *ExErr, depth int, json map[string]any) // (Optionally) extend the gin `__data` output with more fields
+	ExtendGinDataOutput    func(err *ExErr, depth int, json map[string]any)                         // (Optionally) extend the gin `__data` output with more fields
+	DisableErrorWrapping   bool                                                                     // Disables the exerr.Wrap()...Build() function - will always return the original error
+	ZeroLogErrGinOutput    bool                                                                     // autom print zerolog logs on ginext.Error() / .Output(gin)  (for SevErr and SevFatal)
+	ZeroLogAllGinOutput    bool                                                                     // autom print zerolog logs on ginext.Error() / .Output(gin)  (for all Severities)
+	ExtendGinMeta          func(ctx context.Context, b *Builder, g *gin.Context, req *http.Request) // (Optionally) extend the final error meta values with additional data from the gin context (a few are automatically added, here more can be included)
+	ExtendContextMeta      func(b *Builder, method Method, dctx context.Context)                    // (Optionally) extend the final error meta values with additional data from the context (a few are automatically added, here more can be included)
+	ZeroLogger             zerolog.Logger                                                           // The logger used to print exerr log messages
 }
 
 type ErrorPackageConfigInit struct {
@@ -23,6 +34,12 @@ type ErrorPackageConfigInit struct {
 	IncludeMetaInGinOutput *bool
 	ExtendGinOutput        func(err *ExErr, json map[string]any)
 	ExtendGinDataOutput    func(err *ExErr, depth int, json map[string]any)
+	DisableErrorWrapping   *bool
+	ZeroLogErrGinOutput    *bool
+	ZeroLogAllGinOutput    *bool
+	ExtendGinMeta          func(ctx context.Context, b *Builder, g *gin.Context, req *http.Request)
+	ExtendContextMeta      func(b *Builder, method Method, dctx context.Context)
+	ZeroLogger             *zerolog.Logger
 }
 
 var initialized = false
@@ -35,6 +52,11 @@ var pkgconfig = ErrorPackageConfig{
 	IncludeMetaInGinOutput: true,
 	ExtendGinOutput:        func(err *ExErr, json map[string]any) {},
 	ExtendGinDataOutput:    func(err *ExErr, depth int, json map[string]any) {},
+	DisableErrorWrapping:   false,
+	ZeroLogErrGinOutput:    true,
+	ZeroLogAllGinOutput:    false,
+	ExtendGinMeta:          func(ctx context.Context, b *Builder, g *gin.Context, req *http.Request) {},
+	ExtendContextMeta:      func(b *Builder, method Method, dctx context.Context) {},
 }
 
 // Init initializes the exerr packages
@@ -47,6 +69,8 @@ func Init(cfg ErrorPackageConfigInit) {
 
 	ego := func(err *ExErr, json map[string]any) {}
 	egdo := func(err *ExErr, depth int, json map[string]any) {}
+	egm := func(ctx context.Context, b *Builder, g *gin.Context, req *http.Request) {}
+	egcm := func(b *Builder, method Method, dctx context.Context) {}
 
 	if cfg.ExtendGinOutput != nil {
 		ego = cfg.ExtendGinOutput
@@ -54,6 +78,19 @@ func Init(cfg ErrorPackageConfigInit) {
 	if cfg.ExtendGinDataOutput != nil {
 		egdo = cfg.ExtendGinDataOutput
 	}
+	if cfg.ExtendGinMeta != nil {
+		egm = cfg.ExtendGinMeta
+	}
+	if cfg.ExtendContextMeta != nil {
+		egcm = cfg.ExtendContextMeta
+	}
+
+	var logger zerolog.Logger
+	if cfg.ZeroLogger != nil {
+		logger = *cfg.ZeroLogger
+	} else {
+		logger = newDefaultLogger()
+	}
 
 	pkgconfig = ErrorPackageConfig{
 		ZeroLogErrTraces:       langext.Coalesce(cfg.ZeroLogErrTraces, pkgconfig.ZeroLogErrTraces),
@@ -63,11 +100,28 @@ func Init(cfg ErrorPackageConfigInit) {
 		IncludeMetaInGinOutput: langext.Coalesce(cfg.IncludeMetaInGinOutput, pkgconfig.IncludeMetaInGinOutput),
 		ExtendGinOutput:        ego,
 		ExtendGinDataOutput:    egdo,
+		DisableErrorWrapping:   langext.Coalesce(cfg.DisableErrorWrapping, pkgconfig.DisableErrorWrapping),
+		ZeroLogAllGinOutput:    langext.Coalesce(cfg.ZeroLogAllGinOutput, pkgconfig.ZeroLogAllGinOutput),
+		ZeroLogErrGinOutput:    langext.Coalesce(cfg.ZeroLogErrGinOutput, pkgconfig.ZeroLogErrGinOutput),
+		ExtendGinMeta:          egm,
+		ExtendContextMeta:      egcm,
+		ZeroLogger:             logger,
 	}
 
 	initialized = true
 }
 
+func newDefaultLogger() zerolog.Logger {
+	cw := zerolog.ConsoleWriter{
+		Out:        os.Stdout,
+		TimeFormat: "2006-01-02 15:04:05 Z07:00",
+	}
+
+	multi := zerolog.MultiLevelWriter(cw)
+
+	return zerolog.New(multi).With().Timestamp().CallerWithSkipFrameCount(4).Logger()
+}
+
 func Initialized() bool {
 	return initialized
 }

exerr/exerr.go

@@ -84,6 +84,9 @@ func (ee *ExErr) FormatLog(lvl LogPrintLevel) string {
 	if lvl == LogPrintShort {
 
 		msg := ee.Message
+		if msg == "" {
+			msg = ee.RecursiveMessage()
+		}
 		if ee.OriginalError != nil && ee.OriginalError.Category == CatForeign {
 			msg = msg + " (" + strings.ReplaceAll(ee.OriginalError.Message, "\n", " ") + ")"
 		}
@@ -258,6 +261,73 @@ func (ee *ExErr) Depth() int {
 	}
 }
 
+// GetMeta returns the meta value with the specified key
+// this method recurses through all wrapped errors and returns the first matching meta value
+func (ee *ExErr) GetMeta(key string) (any, bool) {
+	for curr := ee; curr != nil; curr = curr.OriginalError {
+		if v, ok := curr.Meta[key]; ok {
+			return v.Value, true
+		}
+	}
+
+	return nil, false
+}
+
+// GetMetaString functions the same as GetMeta, but returns false if the type does not match
+func (ee *ExErr) GetMetaString(key string) (string, bool) {
+	if v1, ok := ee.GetMeta(key); ok {
+		if v2, ok := v1.(string); ok {
+			return v2, true
+		}
+	}
+	return "", false
+}
+
+func (ee *ExErr) GetMetaBool(key string) (bool, bool) {
+	if v1, ok := ee.GetMeta(key); ok {
+		if v2, ok := v1.(bool); ok {
+			return v2, true
+		}
+	}
+	return false, false
+}
+
+func (ee *ExErr) GetMetaInt(key string) (int, bool) {
+	if v1, ok := ee.GetMeta(key); ok {
+		if v2, ok := v1.(int); ok {
+			return v2, true
+		}
+	}
+	return 0, false
+}
+
+func (ee *ExErr) GetMetaFloat32(key string) (float32, bool) {
+	if v1, ok := ee.GetMeta(key); ok {
+		if v2, ok := v1.(float32); ok {
+			return v2, true
+		}
+	}
+	return 0, false
+}
+
+func (ee *ExErr) GetMetaFloat64(key string) (float64, bool) {
+	if v1, ok := ee.GetMeta(key); ok {
+		if v2, ok := v1.(float64); ok {
+			return v2, true
+		}
+	}
+	return 0, false
+}
+
+func (ee *ExErr) GetMetaTime(key string) (time.Time, bool) {
+	if v1, ok := ee.GetMeta(key); ok {
+		if v2, ok := v1.(time.Time); ok {
+			return v2, true
+		}
+	}
+	return time.Time{}, false
+}
+
 // contains test if the supplied error is contained in this error (anywhere in the chain)
 func (ee *ExErr) contains(original *ExErr) (*ExErr, bool) {
 	if original == nil {

exerr/exerr_test.go

@@ -2,10 +2,19 @@ package exerr
 
 import (
 	"errors"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"gogs.mikescher.com/BlackForestBytes/goext/tst"
+	"os"
 	"testing"
 )
 
+func TestMain(m *testing.M) {
+	if !Initialized() {
+		Init(ErrorPackageConfigInit{ZeroLogErrTraces: langext.PFalse, ZeroLogAllTraces: langext.PFalse})
+	}
+	os.Exit(m.Run())
+}
+
 type golangErr struct {
 	Message string
 }

exerr/gin.go

@@ -15,10 +15,10 @@ func (ee *ExErr) toJson(depth int, applyExtendListener bool, outputMeta bool) la
 		ginJson["id"] = ee.UniqueID
 	}
 	if ee.Category != CatWrap {
-		ginJson["category"] = ee.Category
+		ginJson["category"] = ee.Category.Category
 	}
 	if ee.Type != TypeWrap {
-		ginJson["type"] = ee.Type
+		ginJson["type"] = ee.Type.Key
 	}
 	if ee.StatusCode != nil {
 		ginJson["statuscode"] = ee.StatusCode
@@ -30,7 +30,7 @@ func (ee *ExErr) toJson(depth int, applyExtendListener bool, outputMeta bool) la
 		ginJson["caller"] = ee.Caller
 	}
 	if ee.Severity != SevErr {
-		ginJson["severity"] = ee.Severity
+		ginJson["severity"] = ee.Severity.Severity
 	}
 	if ee.Timestamp != (time.Time{}) {
 		ginJson["time"] = ee.Timestamp.Format(time.RFC3339)
@@ -57,6 +57,19 @@ func (ee *ExErr) toJson(depth int, applyExtendListener bool, outputMeta bool) la
 	return ginJson
 }
 
+func (ee *ExErr) ToDefaultAPIJson() (string, error) {
+
+	gjr := json.GoJsonRender{Data: ee.ToAPIJson(true, pkgconfig.ExtendedGinOutput, pkgconfig.IncludeMetaInGinOutput), NilSafeSlices: true, NilSafeMaps: true}
+
+	r, err := gjr.RenderString()
+
+	if err != nil {
+		return "", err
+	}
+
+	return r, nil
+}
+
 // ToAPIJson converts the ExError to a json object
 // (the same object as used in the Output(gin) method)
 //

exerr/listener.go

@@ -4,15 +4,6 @@ import (
 	"sync"
 )
 
-type Method string
-
-const (
-	MethodOutput Method = "OUTPUT"
-	MethodPrint  Method = "PRINT"
-	MethodBuild  Method = "BUILD"
-	MethodFatal  Method = "FATAL"
-)
-
 type Listener = func(method Method, v *ExErr)
 
 var listenerLock = sync.Mutex{}
@@ -25,13 +16,11 @@ func RegisterListener(l Listener) {
 	listener = append(listener, l)
 }
 
-func (b *Builder) CallListener(m Method) {
+func (ee *ExErr) CallListener(m Method) {
-	valErr := b.errorData
-
 	listenerLock.Lock()
 	defer listenerLock.Unlock()
 
 	for _, v := range listener {
-		v(m, valErr)
+		v(m, ee)
 	}
 }

exerr/meta.go

@@ -9,6 +9,7 @@ import (
 	"go.mongodb.org/mongo-driver/bson"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"math"
 	"strconv"
 	"strings"
 	"time"
@@ -667,6 +668,28 @@ func (v MetaValue) rawValueForJson() any {
 		}
 		return v.Value.(EnumWrap).ValueString
 	}
+	if v.DataType == MDTFloat32 {
+		if math.IsNaN(float64(v.Value.(float32))) {
+			return "float64::NaN"
+		} else if math.IsInf(float64(v.Value.(float32)), +1) {
+			return "float64::+inf"
+		} else if math.IsInf(float64(v.Value.(float32)), -1) {
+			return "float64::-inf"
+		} else {
+			return v.Value
+		}
+	}
+	if v.DataType == MDTFloat64 {
+		if math.IsNaN(v.Value.(float64)) {
+			return "float64::NaN"
+		} else if math.IsInf(v.Value.(float64), +1) {
+			return "float64::+inf"
+		} else if math.IsInf(v.Value.(float64), -1) {
+			return "float64::-inf"
+		} else {
+			return v.Value
+		}
+	}
 	return v.Value
 }
 

ginext/engine.go

@@ -9,6 +9,7 @@ import (
 	"gogs.mikescher.com/BlackForestBytes/goext/rext"
 	"net"
 	"net/http"
+	"net/http/httptest"
 	"regexp"
 	"strings"
 	"time"
@@ -16,12 +17,15 @@ import (
 
 type GinWrapper struct {
 	engine          *gin.Engine
-	SuppressGinLogs bool
+	suppressGinLogs bool
 
-	allowCors      bool
+	opt                   Options
-	ginDebug       bool
+	allowCors             bool
-	bufferBody     bool
+	ginDebug              bool
-	requestTimeout time.Duration
+	bufferBody            bool
+	requestTimeout        time.Duration
+	listenerBeforeRequest []func(g *gin.Context)
+	listenerAfterRequest  []func(g *gin.Context, resp HTTPResponse)
 
 	routeSpecs []ginRouteSpec
 }
@@ -33,47 +37,59 @@ type ginRouteSpec struct {
 	Handler     string
 }
 
+type Options struct {
+	AllowCors                *bool                                     // Add cors handler to allow all CORS requests on the default http methods
+	GinDebug                 *bool                                     // Set gin.debug to true (adds more logs)
+	SuppressGinLogs          *bool                                     // Suppress our custom gin logs (even if GinDebug == true)
+	BufferBody               *bool                                     // Buffers the input body stream, this way the ginext error handler can later include the whole request body
+	Timeout                  *time.Duration                            // The default handler timeout
+	ListenerBeforeRequest    []func(g *gin.Context)                    // Register listener that are called before the handler method
+	ListenerAfterRequest     []func(g *gin.Context, resp HTTPResponse) // Register listener that are called after the handler method
+	DebugTrimHandlerPrefixes []string                                  // Trim these prefixes from the handler names in the debug print
+	DebugReplaceHandlerNames map[string]string                         // Replace handler names in debug output
+}
+
 // NewEngine creates a new (wrapped) ginEngine
-// Parameters are:
+func NewEngine(opt Options) *GinWrapper {
-// - [allowCors]    Add cors handler to allow all CORS requests on the default http methods
+	ginDebug := langext.Coalesce(opt.GinDebug, true)
-// - [ginDebug]     Set gin.debug to true (adds more logs)
+	if ginDebug {
-// - [bufferBody]   Buffers the input body stream, this way the ginext error handler can later include the whole request body
+		gin.SetMode(gin.DebugMode)
-// - [timeout]      The default handler timeout
+
-func NewEngine(allowCors bool, ginDebug bool, bufferBody bool, timeout time.Duration) *GinWrapper {
+		// do not debug-print routes
+		gin.DebugPrintRouteFunc = func(_, _, _ string, _ int) {}
+
+	} else {
+		gin.SetMode(gin.ReleaseMode)
+
+		// do not debug-print routes
+		gin.DebugPrintRouteFunc = func(_, _, _ string, _ int) {}
+	}
+
 	engine := gin.New()
 
 	wrapper := &GinWrapper{
-		engine:          engine,
+		engine:                engine,
-		SuppressGinLogs: false,
+		opt:                   opt,
-		allowCors:       allowCors,
+		suppressGinLogs:       langext.Coalesce(opt.SuppressGinLogs, false),
-		ginDebug:        ginDebug,
+		allowCors:             langext.Coalesce(opt.AllowCors, false),
-		bufferBody:      bufferBody,
+		ginDebug:              ginDebug,
-		requestTimeout:  timeout,
+		bufferBody:            langext.Coalesce(opt.BufferBody, false),
+		requestTimeout:        langext.Coalesce(opt.Timeout, 24*time.Hour),
+		listenerBeforeRequest: opt.ListenerBeforeRequest,
+		listenerAfterRequest:  opt.ListenerAfterRequest,
 	}
 
 	engine.RedirectFixedPath = false
 	engine.RedirectTrailingSlash = false
 
-	if allowCors {
+	if wrapper.allowCors {
 		engine.Use(CorsMiddleware())
 	}
 
-	// do not debug-print routes
+	if ginDebug && !wrapper.suppressGinLogs {
-	gin.DebugPrintRouteFunc = func(_, _, _ string, _ int) {}
-
-	if !ginDebug {
-		gin.SetMode(gin.ReleaseMode)
-
 		ginlogger := gin.Logger()
-		engine.Use(func(context *gin.Context) {
+		engine.Use(func(context *gin.Context) { ginlogger(context) })
-			if !wrapper.SuppressGinLogs {
-				ginlogger(context)
-			}
-		})
-	} else {
-		gin.SetMode(gin.DebugMode)
 	}
-
 	return wrapper
 }
 
@@ -175,5 +191,34 @@ func (w *GinWrapper) cleanMiddlewareName(fname string) string {
 		}
 	}
 
+	for _, pfx := range w.opt.DebugTrimHandlerPrefixes {
+		if strings.HasPrefix(fname, pfx) {
+			fname = fname[len(pfx):]
+		}
+	}
+
+	for k, v := range langext.ForceMap(w.opt.DebugReplaceHandlerNames) {
+		if strings.EqualFold(fname, k) {
+			fname = v
+		}
+	}
+
 	return fname
 }
+
+// ServeHTTP only used for unit tests
+func (w *GinWrapper) ServeHTTP(req *http.Request) *httptest.ResponseRecorder {
+	respRec := httptest.NewRecorder()
+	w.engine.ServeHTTP(respRec, req)
+	return respRec
+}
+
+// ForwardRequest manually inserts a request into this router
+// = behaves as if the request came from the outside (and writes the response to `writer`)
+func (w *GinWrapper) ForwardRequest(writer http.ResponseWriter, req *http.Request) {
+	w.engine.ServeHTTP(writer, req)
+}
+
+func (w *GinWrapper) ListRoutes() []gin.RouteInfo {
+	return w.engine.Routes()
+}

ginext/funcWrapper.go

@@ -20,6 +20,10 @@ func Wrap(w *GinWrapper, fn WHandlerFunc) gin.HandlerFunc {
 			persistantData: &preContextData{},
 		}
 
+		for _, lstr := range w.listenerBeforeRequest {
+			lstr(g)
+		}
+
 		wrap, stackTrace, panicObj := callPanicSafe(fn, pctx)
 		if panicObj != nil {
 
@@ -45,6 +49,10 @@ func Wrap(w *GinWrapper, fn WHandlerFunc) gin.HandlerFunc {
 			}
 		}
 
+		for _, lstr := range w.listenerAfterRequest {
+			lstr(g, wrap)
+		}
+
 		if reqctx.Err() == nil {
 			wrap.Write(g)
 		}

ginext/preContext.go

@@ -163,16 +163,16 @@ func (pctx PreContext) Start() (*AppContext, *gin.Context, *HTTPResponse) {
 
 	ictx, cancel := context.WithTimeout(context.Background(), langext.Coalesce(pctx.timeout, pctx.wrapper.requestTimeout))
 
+	actx := CreateAppContext(pctx.ginCtx, ictx, cancel)
+
 	if pctx.persistantData.sessionObj != nil {
-		err := pctx.persistantData.sessionObj.Init(pctx.ginCtx, ictx)
+		err := pctx.persistantData.sessionObj.Init(pctx.ginCtx, actx)
 		if err != nil {
-			cancel()
+			actx.Cancel()
 			return nil, nil, langext.Ptr(Error(exerr.Wrap(err, "Failed to init session").Build()))
 		}
 	}
 
-	actx := CreateAppContext(pctx.ginCtx, ictx, cancel)
-
 	return actx, pctx.ginCtx, nil
 }
 

ginext/response.go

@@ -1,12 +1,20 @@
 package ginext
 
 import (
-	"fmt"
 	"github.com/gin-gonic/gin"
 	"gogs.mikescher.com/BlackForestBytes/goext/exerr"
-	json "gogs.mikescher.com/BlackForestBytes/goext/gojson"
 )
 
+type cookieval struct {
+	name     string
+	value    string
+	maxAge   int
+	path     string
+	domain   string
+	secure   bool
+	httpOnly bool
+}
+
 type headerval struct {
 	Key string
 	Val string
@@ -15,237 +23,17 @@ type headerval struct {
 type HTTPResponse interface {
 	Write(g *gin.Context)
 	WithHeader(k string, v string) HTTPResponse
+	WithCookie(name string, value string, maxAge int, path string, domain string, secure bool, httpOnly bool) HTTPResponse
 	IsSuccess() bool
 }
 
-type jsonHTTPResponse struct {
+type InspectableHTTPResponse interface {
-	statusCode int
+	HTTPResponse
-	data       any
-	headers    []headerval
-}
 
-func (j jsonHTTPResponse) Write(g *gin.Context) {
+	Statuscode() int
-	for _, v := range j.headers {
+	BodyString(g *gin.Context) *string
-		g.Header(v.Key, v.Val)
+	ContentType() string
-	}
+	Headers() []string
-	var f *string
-	if jsonfilter := g.GetString("goext.jsonfilter"); jsonfilter != "" {
-		f = &jsonfilter
-	}
-	g.Render(j.statusCode, json.GoJsonRender{Data: j.data, NilSafeSlices: true, NilSafeMaps: true, Filter: f})
-}
-
-func (j jsonHTTPResponse) WithHeader(k string, v string) HTTPResponse {
-	j.headers = append(j.headers, headerval{k, v})
-	return j
-}
-
-func (j jsonHTTPResponse) IsSuccess() bool {
-	return j.statusCode >= 200 && j.statusCode <= 399
-}
-
-type emptyHTTPResponse struct {
-	statusCode int
-	headers    []headerval
-}
-
-func (j emptyHTTPResponse) Write(g *gin.Context) {
-	for _, v := range j.headers {
-		g.Header(v.Key, v.Val)
-	}
-	g.Status(j.statusCode)
-}
-
-func (j emptyHTTPResponse) WithHeader(k string, v string) HTTPResponse {
-	j.headers = append(j.headers, headerval{k, v})
-	return j
-}
-
-func (j emptyHTTPResponse) IsSuccess() bool {
-	return j.statusCode >= 200 && j.statusCode <= 399
-}
-
-type textHTTPResponse struct {
-	statusCode int
-	data       string
-	headers    []headerval
-}
-
-func (j textHTTPResponse) Write(g *gin.Context) {
-	for _, v := range j.headers {
-		g.Header(v.Key, v.Val)
-	}
-	g.String(j.statusCode, "%s", j.data)
-}
-
-func (j textHTTPResponse) WithHeader(k string, v string) HTTPResponse {
-	j.headers = append(j.headers, headerval{k, v})
-	return j
-}
-
-func (j textHTTPResponse) IsSuccess() bool {
-	return j.statusCode >= 200 && j.statusCode <= 399
-}
-
-type dataHTTPResponse struct {
-	statusCode  int
-	data        []byte
-	contentType string
-	headers     []headerval
-}
-
-func (j dataHTTPResponse) Write(g *gin.Context) {
-	for _, v := range j.headers {
-		g.Header(v.Key, v.Val)
-	}
-	g.Data(j.statusCode, j.contentType, j.data)
-}
-
-func (j dataHTTPResponse) WithHeader(k string, v string) HTTPResponse {
-	j.headers = append(j.headers, headerval{k, v})
-	return j
-}
-
-func (j dataHTTPResponse) IsSuccess() bool {
-	return j.statusCode >= 200 && j.statusCode <= 399
-}
-
-type fileHTTPResponse struct {
-	mimetype string
-	filepath string
-	filename *string
-	headers  []headerval
-}
-
-func (j fileHTTPResponse) Write(g *gin.Context) {
-	g.Header("Content-Type", j.mimetype) // if we don't set it here gin does weird file-sniffing later...
-	if j.filename != nil {
-		g.Header("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", *j.filename))
-
-	}
-	for _, v := range j.headers {
-		g.Header(v.Key, v.Val)
-	}
-	g.File(j.filepath)
-}
-
-func (j fileHTTPResponse) WithHeader(k string, v string) HTTPResponse {
-	j.headers = append(j.headers, headerval{k, v})
-	return j
-}
-
-func (j fileHTTPResponse) IsSuccess() bool {
-	return true
-}
-
-type downloadDataHTTPResponse struct {
-	statusCode int
-	mimetype   string
-	data       []byte
-	filename   *string
-	headers    []headerval
-}
-
-func (j downloadDataHTTPResponse) Write(g *gin.Context) {
-	g.Header("Content-Type", j.mimetype) // if we don't set it here gin does weird file-sniffing later...
-	if j.filename != nil {
-		g.Header("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", *j.filename))
-
-	}
-	for _, v := range j.headers {
-		g.Header(v.Key, v.Val)
-	}
-	g.Data(j.statusCode, j.mimetype, j.data)
-}
-
-func (j downloadDataHTTPResponse) WithHeader(k string, v string) HTTPResponse {
-	j.headers = append(j.headers, headerval{k, v})
-	return j
-}
-
-func (j downloadDataHTTPResponse) IsSuccess() bool {
-	return j.statusCode >= 200 && j.statusCode <= 399
-}
-
-type redirectHTTPResponse struct {
-	statusCode int
-	url        string
-	headers    []headerval
-}
-
-func (j redirectHTTPResponse) Write(g *gin.Context) {
-	g.Redirect(j.statusCode, j.url)
-}
-
-func (j redirectHTTPResponse) WithHeader(k string, v string) HTTPResponse {
-	j.headers = append(j.headers, headerval{k, v})
-	return j
-}
-
-func (j redirectHTTPResponse) IsSuccess() bool {
-	return j.statusCode >= 200 && j.statusCode <= 399
-}
-
-type jsonAPIErrResponse struct {
-	err     *exerr.ExErr
-	headers []headerval
-}
-
-func (j jsonAPIErrResponse) Write(g *gin.Context) {
-	j.err.Output(g)
-}
-
-func (j jsonAPIErrResponse) WithHeader(k string, v string) HTTPResponse {
-	j.headers = append(j.headers, headerval{k, v})
-	return j
-}
-
-func (j jsonAPIErrResponse) IsSuccess() bool {
-	return false
-}
-
-func Status(sc int) HTTPResponse {
-	return &emptyHTTPResponse{statusCode: sc}
-}
-
-func JSON(sc int, data any) HTTPResponse {
-	return &jsonHTTPResponse{statusCode: sc, data: data}
-}
-
-func Data(sc int, contentType string, data []byte) HTTPResponse {
-	return &dataHTTPResponse{statusCode: sc, contentType: contentType, data: data}
-}
-
-func Text(sc int, data string) HTTPResponse {
-	return &textHTTPResponse{statusCode: sc, data: data}
-}
-
-func File(mimetype string, filepath string) HTTPResponse {
-	return &fileHTTPResponse{mimetype: mimetype, filepath: filepath}
-}
-
-func Download(mimetype string, filepath string, filename string) HTTPResponse {
-	return &fileHTTPResponse{mimetype: mimetype, filepath: filepath, filename: &filename}
-}
-
-func DownloadData(status int, mimetype string, filename string, data []byte) HTTPResponse {
-	return &downloadDataHTTPResponse{statusCode: status, mimetype: mimetype, data: data, filename: &filename}
-}
-
-func Redirect(sc int, newURL string) HTTPResponse {
-	return &redirectHTTPResponse{statusCode: sc, url: newURL}
-}
-
-func Error(e error) HTTPResponse {
-	return &jsonAPIErrResponse{
-		err: exerr.FromError(e),
-	}
-}
-
-func ErrWrap(e error, errorType exerr.ErrorType, msg string) HTTPResponse {
-	return &jsonAPIErrResponse{
-		err: exerr.FromError(exerr.Wrap(e, msg).WithType(errorType).Build()),
-	}
 }
 
 func NotImplemented() HTTPResponse {

ginext/responseData.go

@@ -0,0 +1,58 @@
+package ginext
+
+import (
+	"github.com/gin-gonic/gin"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+)
+
+type dataHTTPResponse struct {
+	statusCode  int
+	data        []byte
+	contentType string
+	headers     []headerval
+	cookies     []cookieval
+}
+
+func (j dataHTTPResponse) Write(g *gin.Context) {
+	for _, v := range j.headers {
+		g.Header(v.Key, v.Val)
+	}
+	for _, v := range j.cookies {
+		g.SetCookie(v.name, v.value, v.maxAge, v.path, v.domain, v.secure, v.httpOnly)
+	}
+	g.Data(j.statusCode, j.contentType, j.data)
+}
+
+func (j dataHTTPResponse) WithHeader(k string, v string) HTTPResponse {
+	j.headers = append(j.headers, headerval{k, v})
+	return j
+}
+
+func (j dataHTTPResponse) WithCookie(name string, value string, maxAge int, path string, domain string, secure bool, httpOnly bool) HTTPResponse {
+	j.cookies = append(j.cookies, cookieval{name, value, maxAge, path, domain, secure, httpOnly})
+	return j
+}
+
+func (j dataHTTPResponse) IsSuccess() bool {
+	return j.statusCode >= 200 && j.statusCode <= 399
+}
+
+func (j dataHTTPResponse) Statuscode() int {
+	return j.statusCode
+}
+
+func (j dataHTTPResponse) BodyString(*gin.Context) *string {
+	return langext.Ptr(string(j.data))
+}
+
+func (j dataHTTPResponse) ContentType() string {
+	return j.contentType
+}
+
+func (j dataHTTPResponse) Headers() []string {
+	return langext.ArrMap(j.headers, func(v headerval) string { return v.Key + "=" + v.Val })
+}
+
+func Data(sc int, contentType string, data []byte) HTTPResponse {
+	return &dataHTTPResponse{statusCode: sc, contentType: contentType, data: data}
+}

ginext/responseDownload.go

@@ -0,0 +1,64 @@
+package ginext
+
+import (
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+)
+
+type downloadDataHTTPResponse struct {
+	statusCode int
+	mimetype   string
+	data       []byte
+	filename   *string
+	headers    []headerval
+	cookies    []cookieval
+}
+
+func (j downloadDataHTTPResponse) Write(g *gin.Context) {
+	g.Header("Content-Type", j.mimetype) // if we don't set it here gin does weird file-sniffing later...
+	if j.filename != nil {
+		g.Header("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", *j.filename))
+	}
+	for _, v := range j.headers {
+		g.Header(v.Key, v.Val)
+	}
+	for _, v := range j.cookies {
+		g.SetCookie(v.name, v.value, v.maxAge, v.path, v.domain, v.secure, v.httpOnly)
+	}
+	g.Data(j.statusCode, j.mimetype, j.data)
+}
+
+func (j downloadDataHTTPResponse) WithHeader(k string, v string) HTTPResponse {
+	j.headers = append(j.headers, headerval{k, v})
+	return j
+}
+
+func (j downloadDataHTTPResponse) WithCookie(name string, value string, maxAge int, path string, domain string, secure bool, httpOnly bool) HTTPResponse {
+	j.cookies = append(j.cookies, cookieval{name, value, maxAge, path, domain, secure, httpOnly})
+	return j
+}
+
+func (j downloadDataHTTPResponse) IsSuccess() bool {
+	return j.statusCode >= 200 && j.statusCode <= 399
+}
+
+func (j downloadDataHTTPResponse) Statuscode() int {
+	return j.statusCode
+}
+
+func (j downloadDataHTTPResponse) BodyString(*gin.Context) *string {
+	return langext.Ptr(string(j.data))
+}
+
+func (j downloadDataHTTPResponse) ContentType() string {
+	return j.mimetype
+}
+
+func (j downloadDataHTTPResponse) Headers() []string {
+	return langext.ArrMap(j.headers, func(v headerval) string { return v.Key + "=" + v.Val })
+}
+
+func DownloadData(status int, mimetype string, filename string, data []byte) HTTPResponse {
+	return &downloadDataHTTPResponse{statusCode: status, mimetype: mimetype, data: data, filename: &filename}
+}

ginext/responseEmpty.go

@@ -0,0 +1,56 @@
+package ginext
+
+import (
+	"github.com/gin-gonic/gin"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+)
+
+type emptyHTTPResponse struct {
+	statusCode int
+	headers    []headerval
+	cookies    []cookieval
+}
+
+func (j emptyHTTPResponse) Write(g *gin.Context) {
+	for _, v := range j.headers {
+		g.Header(v.Key, v.Val)
+	}
+	for _, v := range j.cookies {
+		g.SetCookie(v.name, v.value, v.maxAge, v.path, v.domain, v.secure, v.httpOnly)
+	}
+	g.Status(j.statusCode)
+}
+
+func (j emptyHTTPResponse) WithHeader(k string, v string) HTTPResponse {
+	j.headers = append(j.headers, headerval{k, v})
+	return j
+}
+
+func (j emptyHTTPResponse) WithCookie(name string, value string, maxAge int, path string, domain string, secure bool, httpOnly bool) HTTPResponse {
+	j.cookies = append(j.cookies, cookieval{name, value, maxAge, path, domain, secure, httpOnly})
+	return j
+}
+
+func (j emptyHTTPResponse) IsSuccess() bool {
+	return j.statusCode >= 200 && j.statusCode <= 399
+}
+
+func (j emptyHTTPResponse) Statuscode() int {
+	return j.statusCode
+}
+
+func (j emptyHTTPResponse) BodyString(*gin.Context) *string {
+	return nil
+}
+
+func (j emptyHTTPResponse) ContentType() string {
+	return ""
+}
+
+func (j emptyHTTPResponse) Headers() []string {
+	return langext.ArrMap(j.headers, func(v headerval) string { return v.Key + "=" + v.Val })
+}
+
+func Status(sc int) HTTPResponse {
+	return &emptyHTTPResponse{statusCode: sc}
+}

ginext/responseFile.go

@@ -0,0 +1,73 @@
+package ginext
+
+import (
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"os"
+)
+
+type fileHTTPResponse struct {
+	mimetype string
+	filepath string
+	filename *string
+	headers  []headerval
+	cookies  []cookieval
+}
+
+func (j fileHTTPResponse) Write(g *gin.Context) {
+	g.Header("Content-Type", j.mimetype) // if we don't set it here gin does weird file-sniffing later...
+	if j.filename != nil {
+		g.Header("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", *j.filename))
+
+	}
+	for _, v := range j.headers {
+		g.Header(v.Key, v.Val)
+	}
+	for _, v := range j.cookies {
+		g.SetCookie(v.name, v.value, v.maxAge, v.path, v.domain, v.secure, v.httpOnly)
+	}
+	g.File(j.filepath)
+}
+
+func (j fileHTTPResponse) WithHeader(k string, v string) HTTPResponse {
+	j.headers = append(j.headers, headerval{k, v})
+	return j
+}
+
+func (j fileHTTPResponse) WithCookie(name string, value string, maxAge int, path string, domain string, secure bool, httpOnly bool) HTTPResponse {
+	j.cookies = append(j.cookies, cookieval{name, value, maxAge, path, domain, secure, httpOnly})
+	return j
+}
+
+func (j fileHTTPResponse) IsSuccess() bool {
+	return true
+}
+
+func (j fileHTTPResponse) Statuscode() int {
+	return 200
+}
+
+func (j fileHTTPResponse) BodyString(*gin.Context) *string {
+	data, err := os.ReadFile(j.filepath)
+	if err != nil {
+		return nil
+	}
+	return langext.Ptr(string(data))
+}
+
+func (j fileHTTPResponse) ContentType() string {
+	return j.mimetype
+}
+
+func (j fileHTTPResponse) Headers() []string {
+	return langext.ArrMap(j.headers, func(v headerval) string { return v.Key + "=" + v.Val })
+}
+
+func File(mimetype string, filepath string) HTTPResponse {
+	return &fileHTTPResponse{mimetype: mimetype, filepath: filepath}
+}
+
+func Download(mimetype string, filepath string, filename string) HTTPResponse {
+	return &fileHTTPResponse{mimetype: mimetype, filepath: filepath, filename: &filename}
+}

ginext/responseJson.go

@@ -0,0 +1,70 @@
+package ginext
+
+import (
+	"github.com/gin-gonic/gin"
+	json "gogs.mikescher.com/BlackForestBytes/goext/gojson"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+)
+
+type jsonHTTPResponse struct {
+	statusCode int
+	data       any
+	headers    []headerval
+	cookies    []cookieval
+}
+
+func (j jsonHTTPResponse) jsonRenderer(g *gin.Context) json.GoJsonRender {
+	var f *string
+	if jsonfilter := g.GetString("goext.jsonfilter"); jsonfilter != "" {
+		f = &jsonfilter
+	}
+	return json.GoJsonRender{Data: j.data, NilSafeSlices: true, NilSafeMaps: true, Filter: f}
+}
+
+func (j jsonHTTPResponse) Write(g *gin.Context) {
+	for _, v := range j.headers {
+		g.Header(v.Key, v.Val)
+	}
+	for _, v := range j.cookies {
+		g.SetCookie(v.name, v.value, v.maxAge, v.path, v.domain, v.secure, v.httpOnly)
+	}
+	g.Render(j.statusCode, j.jsonRenderer(g))
+}
+
+func (j jsonHTTPResponse) WithHeader(k string, v string) HTTPResponse {
+	j.headers = append(j.headers, headerval{k, v})
+	return j
+}
+
+func (j jsonHTTPResponse) WithCookie(name string, value string, maxAge int, path string, domain string, secure bool, httpOnly bool) HTTPResponse {
+	j.cookies = append(j.cookies, cookieval{name, value, maxAge, path, domain, secure, httpOnly})
+	return j
+}
+
+func (j jsonHTTPResponse) IsSuccess() bool {
+	return j.statusCode >= 200 && j.statusCode <= 399
+}
+
+func (j jsonHTTPResponse) Statuscode() int {
+	return j.statusCode
+}
+
+func (j jsonHTTPResponse) BodyString(g *gin.Context) *string {
+	if str, err := j.jsonRenderer(g).RenderString(); err == nil {
+		return &str
+	} else {
+		return nil
+	}
+}
+
+func (j jsonHTTPResponse) ContentType() string {
+	return "application/json"
+}
+
+func (j jsonHTTPResponse) Headers() []string {
+	return langext.ArrMap(j.headers, func(v headerval) string { return v.Key + "=" + v.Val })
+}
+
+func JSON(sc int, data any) HTTPResponse {
+	return &jsonHTTPResponse{statusCode: sc, data: data}
+}

ginext/responseJsonAPI.go

@@ -0,0 +1,77 @@
+package ginext
+
+import (
+	"context"
+	"github.com/gin-gonic/gin"
+	"gogs.mikescher.com/BlackForestBytes/goext/exerr"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+)
+
+type jsonAPIErrResponse struct {
+	err     *exerr.ExErr
+	headers []headerval
+	cookies []cookieval
+}
+
+func (j jsonAPIErrResponse) Write(g *gin.Context) {
+	for _, v := range j.headers {
+		g.Header(v.Key, v.Val)
+	}
+	for _, v := range j.cookies {
+		g.SetCookie(v.name, v.value, v.maxAge, v.path, v.domain, v.secure, v.httpOnly)
+	}
+
+	exerr.Get(j.err).Output(context.Background(), g)
+
+	j.err.CallListener(exerr.MethodOutput)
+}
+
+func (j jsonAPIErrResponse) WithHeader(k string, v string) HTTPResponse {
+	j.headers = append(j.headers, headerval{k, v})
+	return j
+}
+
+func (j jsonAPIErrResponse) WithCookie(name string, value string, maxAge int, path string, domain string, secure bool, httpOnly bool) HTTPResponse {
+	j.cookies = append(j.cookies, cookieval{name, value, maxAge, path, domain, secure, httpOnly})
+	return j
+}
+
+func (j jsonAPIErrResponse) IsSuccess() bool {
+	return false
+}
+
+func (j jsonAPIErrResponse) Statuscode() int {
+	return langext.Coalesce(j.err.RecursiveStatuscode(), 0)
+}
+
+func (j jsonAPIErrResponse) BodyString(*gin.Context) *string {
+	if str, err := j.err.ToDefaultAPIJson(); err == nil {
+		return &str
+	} else {
+		return nil
+	}
+}
+
+func (j jsonAPIErrResponse) ContentType() string {
+	return "application/json"
+}
+
+func (j jsonAPIErrResponse) Headers() []string {
+	return langext.ArrMap(j.headers, func(v headerval) string { return v.Key + "=" + v.Val })
+}
+
+func (j jsonAPIErrResponse) Unwrap() error {
+	return j.err
+}
+
+func Error(e error) HTTPResponse {
+	return &jsonAPIErrResponse{
+		err: exerr.FromError(e),
+	}
+}
+
+func ErrWrap(e error, errorType exerr.ErrorType, msg string) HTTPResponse {
+	return &jsonAPIErrResponse{
+		err: exerr.FromError(exerr.Wrap(e, msg).WithType(errorType).Build()),
+	}
+}

ginext/responseRedirect.go

@@ -0,0 +1,57 @@
+package ginext
+
+import (
+	"github.com/gin-gonic/gin"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+)
+
+type redirectHTTPResponse struct {
+	statusCode int
+	url        string
+	headers    []headerval
+	cookies    []cookieval
+}
+
+func (j redirectHTTPResponse) Write(g *gin.Context) {
+	for _, v := range j.headers {
+		g.Header(v.Key, v.Val)
+	}
+	for _, v := range j.cookies {
+		g.SetCookie(v.name, v.value, v.maxAge, v.path, v.domain, v.secure, v.httpOnly)
+	}
+	g.Redirect(j.statusCode, j.url)
+}
+
+func (j redirectHTTPResponse) WithHeader(k string, v string) HTTPResponse {
+	j.headers = append(j.headers, headerval{k, v})
+	return j
+}
+
+func (j redirectHTTPResponse) WithCookie(name string, value string, maxAge int, path string, domain string, secure bool, httpOnly bool) HTTPResponse {
+	j.cookies = append(j.cookies, cookieval{name, value, maxAge, path, domain, secure, httpOnly})
+	return j
+}
+
+func (j redirectHTTPResponse) IsSuccess() bool {
+	return j.statusCode >= 200 && j.statusCode <= 399
+}
+
+func (j redirectHTTPResponse) Statuscode() int {
+	return j.statusCode
+}
+
+func (j redirectHTTPResponse) BodyString(*gin.Context) *string {
+	return nil
+}
+
+func (j redirectHTTPResponse) ContentType() string {
+	return ""
+}
+
+func (j redirectHTTPResponse) Headers() []string {
+	return langext.ArrMap(j.headers, func(v headerval) string { return v.Key + "=" + v.Val })
+}
+
+func Redirect(sc int, newURL string) HTTPResponse {
+	return &redirectHTTPResponse{statusCode: sc, url: newURL}
+}

ginext/responseSeekable.go

@@ -0,0 +1,72 @@
+package ginext
+
+import (
+	"github.com/gin-gonic/gin"
+	"gogs.mikescher.com/BlackForestBytes/goext/exerr"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"io"
+	"net/http"
+	"time"
+)
+
+type seekableResponse struct {
+	data        io.ReadSeeker
+	contentType string
+	filename    string
+	headers     []headerval
+	cookies     []cookieval
+}
+
+func (j seekableResponse) Write(g *gin.Context) {
+	g.Header("Content-Type", j.contentType) // if we don't set it here http.ServeContent does weird sniffing later...
+
+	for _, v := range j.headers {
+		g.Header(v.Key, v.Val)
+	}
+	for _, v := range j.cookies {
+		g.SetCookie(v.name, v.value, v.maxAge, v.path, v.domain, v.secure, v.httpOnly)
+	}
+
+	http.ServeContent(g.Writer, g.Request, j.filename, time.Unix(0, 0), j.data)
+
+	if clsr, ok := j.data.(io.ReadSeekCloser); ok {
+		err := clsr.Close()
+		if err != nil {
+			exerr.Wrap(err, "failed to close io.ReadSeerkClose in ginext.Seekable").Str("filename", j.filename).Print()
+		}
+	}
+}
+
+func (j seekableResponse) WithHeader(k string, v string) HTTPResponse {
+	j.headers = append(j.headers, headerval{k, v})
+	return j
+}
+
+func (j seekableResponse) WithCookie(name string, value string, maxAge int, path string, domain string, secure bool, httpOnly bool) HTTPResponse {
+	j.cookies = append(j.cookies, cookieval{name, value, maxAge, path, domain, secure, httpOnly})
+	return j
+}
+
+func (j seekableResponse) IsSuccess() bool {
+	return true
+}
+
+func (j seekableResponse) Statuscode() int {
+	return 200
+}
+
+func (j seekableResponse) BodyString(*gin.Context) *string {
+	return langext.Ptr("(seekable)")
+}
+
+func (j seekableResponse) ContentType() string {
+	return j.contentType
+}
+
+func (j seekableResponse) Headers() []string {
+	return langext.ArrMap(j.headers, func(v headerval) string { return v.Key + "=" + v.Val })
+}
+
+func Seekable(filename string, contentType string, data io.ReadSeeker) HTTPResponse {
+	return &seekableResponse{filename: filename, contentType: contentType, data: data}
+}

ginext/responseText.go

@@ -0,0 +1,57 @@
+package ginext
+
+import (
+	"github.com/gin-gonic/gin"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+)
+
+type textHTTPResponse struct {
+	statusCode int
+	data       string
+	headers    []headerval
+	cookies    []cookieval
+}
+
+func (j textHTTPResponse) Write(g *gin.Context) {
+	for _, v := range j.headers {
+		g.Header(v.Key, v.Val)
+	}
+	for _, v := range j.cookies {
+		g.SetCookie(v.name, v.value, v.maxAge, v.path, v.domain, v.secure, v.httpOnly)
+	}
+	g.String(j.statusCode, "%s", j.data)
+}
+
+func (j textHTTPResponse) WithHeader(k string, v string) HTTPResponse {
+	j.headers = append(j.headers, headerval{k, v})
+	return j
+}
+
+func (j textHTTPResponse) WithCookie(name string, value string, maxAge int, path string, domain string, secure bool, httpOnly bool) HTTPResponse {
+	j.cookies = append(j.cookies, cookieval{name, value, maxAge, path, domain, secure, httpOnly})
+	return j
+}
+
+func (j textHTTPResponse) IsSuccess() bool {
+	return j.statusCode >= 200 && j.statusCode <= 399
+}
+
+func (j textHTTPResponse) Statuscode() int {
+	return j.statusCode
+}
+
+func (j textHTTPResponse) BodyString(*gin.Context) *string {
+	return langext.Ptr(j.data)
+}
+
+func (j textHTTPResponse) ContentType() string {
+	return "text/plain"
+}
+
+func (j textHTTPResponse) Headers() []string {
+	return langext.ArrMap(j.headers, func(v headerval) string { return v.Key + "=" + v.Val })
+}
+
+func Text(sc int, data string) HTTPResponse {
+	return &textHTTPResponse{statusCode: sc, data: data}
+}

ginext/routes.go

@@ -53,15 +53,11 @@ func (w *GinRoutesWrapper) Group(relativePath string) *GinRoutesWrapper {
 func (w *GinRoutesWrapper) Use(middleware ...gin.HandlerFunc) *GinRoutesWrapper {
 	defHandler := langext.ArrCopy(w.defaultHandler)
 	defHandler = append(defHandler, middleware...)
-	return &GinRoutesWrapper{wrapper: w.wrapper, routes: w.routes, defaultHandler: defHandler}
+	return &GinRoutesWrapper{wrapper: w.wrapper, routes: w.routes, defaultHandler: defHandler, absPath: w.absPath}
 }
 
 func (w *GinRoutesWrapper) WithJSONFilter(filter string) *GinRoutesWrapper {
-	defHandler := langext.ArrCopy(w.defaultHandler)
+	return w.Use(func(g *gin.Context) { g.Set("goext.jsonfilter", filter) })
-	defHandler = append(defHandler, func(g *gin.Context) {
-		g.Set("goext.jsonfilter", filter)
-	})
-	return &GinRoutesWrapper{wrapper: w.wrapper, routes: w.routes, defaultHandler: defHandler}
 }
 
 func (w *GinRoutesWrapper) GET(relativePath string) *GinRouteBuilder {
@@ -116,10 +112,7 @@ func (w *GinRouteBuilder) Use(middleware ...gin.HandlerFunc) *GinRouteBuilder {
 }
 
 func (w *GinRouteBuilder) WithJSONFilter(filter string) *GinRouteBuilder {
-	w.handlers = append(w.handlers, func(g *gin.Context) {
+	return w.Use(func(g *gin.Context) { g.Set("goext.jsonfilter", filter) })
-		g.Set("goext.jsonfilter", filter)
-	})
-	return w
 }
 
 func (w *GinRouteBuilder) Handle(handler WHandlerFunc) {

ginext/session.go

@@ -6,6 +6,6 @@ import (
 )
 
 type SessionObject interface {
-	Init(g *gin.Context, ctx context.Context) error
+	Init(g *gin.Context, ctx *AppContext) error
 	Finish(ctx context.Context, resp HTTPResponse) error
 }

go.mod

@@ -1,49 +1,66 @@
 module gogs.mikescher.com/BlackForestBytes/goext
 
-go 1.21
+go 1.22
 
 require (
-	github.com/gin-gonic/gin v1.9.1
+	github.com/gin-gonic/gin v1.10.0
-	github.com/jmoiron/sqlx v1.3.5
+	github.com/glebarez/go-sqlite v1.22.0 // only needed for tests -.-
+	github.com/jmoiron/sqlx v1.4.0
 	github.com/rs/xid v1.5.0
-	github.com/rs/zerolog v1.31.0
+	github.com/rs/zerolog v1.33.0
-	go.mongodb.org/mongo-driver v1.13.1
+	go.mongodb.org/mongo-driver v1.16.0
-	golang.org/x/crypto v0.16.0
+	golang.org/x/crypto v0.24.0
-	golang.org/x/sys v0.15.0
+	golang.org/x/sys v0.21.0
-	golang.org/x/term v0.15.0
+	golang.org/x/term v0.21.0
 )
 
 require (
-	github.com/bytedance/sonic v1.10.2 // indirect
+	github.com/disintegration/imaging v1.6.2
+	github.com/jung-kurt/gofpdf v1.16.2
+	golang.org/x/sync v0.7.0
+)
+
+require (
+	github.com/bytedance/sonic v1.11.9 // indirect
+	github.com/bytedance/sonic/loader v0.1.1 // indirect
 	github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d // indirect
 	github.com/chenzhuoyu/iasm v0.9.1 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.3 // indirect
+	github.com/cloudwego/base64x v0.1.4 // indirect
+	github.com/cloudwego/iasm v0.2.0 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.4 // indirect
 	github.com/gin-contrib/sse v0.1.0 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
-	github.com/go-playground/validator/v10 v10.16.0 // indirect
+	github.com/go-playground/validator/v10 v10.22.0 // indirect
-	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/goccy/go-json v0.10.3 // indirect
 	github.com/golang/snappy v0.0.4 // indirect
+	github.com/google/uuid v1.5.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/klauspost/compress v1.17.4 // indirect
+	github.com/klauspost/compress v1.17.9 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.6 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.8 // indirect
-	github.com/leodido/go-urn v1.2.4 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/montanaflynn/stats v0.7.1 // indirect
-	github.com/pelletier/go-toml/v2 v2.1.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.12 // indirect
 	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
 	github.com/xdg-go/scram v1.1.2 // indirect
 	github.com/xdg-go/stringprep v1.0.4 // indirect
-	github.com/youmark/pkcs8 v0.0.0-20201027041543-1326539a0a0a // indirect
+	github.com/youmark/pkcs8 v0.0.0-20240424034433-3c2c7870ae76 // indirect
-	golang.org/x/arch v0.6.0 // indirect
+	golang.org/x/arch v0.8.0 // indirect
-	golang.org/x/net v0.19.0 // indirect
+	golang.org/x/image v0.18.0 // indirect
-	golang.org/x/sync v0.5.0 // indirect
+	golang.org/x/net v0.26.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/text v0.16.0 // indirect
-	google.golang.org/protobuf v1.31.0 // indirect
+	google.golang.org/protobuf v1.34.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
+	modernc.org/libc v1.37.6 // indirect
+	modernc.org/mathutil v1.6.0 // indirect
+	modernc.org/memory v1.7.2 // indirect
+	modernc.org/sqlite v1.28.0 // indirect
 )

go.sum

@@ -1,40 +1,98 @@
+filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+github.com/boombuler/barcode v1.0.0/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
 github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
 github.com/bytedance/sonic v1.10.0-rc/go.mod h1:ElCzW+ufi8qKqNW0FY314xriJhyJhuoJ3gFZdAHF7NM=
 github.com/bytedance/sonic v1.10.2 h1:GQebETVBxYB7JGWJtLBi07OVzWwt+8dWA00gEVW2ZFE=
 github.com/bytedance/sonic v1.10.2/go.mod h1:iZcSUejdk5aukTND/Eu/ivjQuEL0Cu9/rf50Hi0u/g4=
+github.com/bytedance/sonic v1.11.0 h1:FwNNv6Vu4z2Onf1++LNzxB/QhitD8wuTdpZzMTGITWo=
+github.com/bytedance/sonic v1.11.0/go.mod h1:iZcSUejdk5aukTND/Eu/ivjQuEL0Cu9/rf50Hi0u/g4=
+github.com/bytedance/sonic v1.11.1 h1:JC0+6c9FoWYYxakaoa+c5QTtJeiSZNeByOBhXtAFSn4=
+github.com/bytedance/sonic v1.11.1/go.mod h1:iZcSUejdk5aukTND/Eu/ivjQuEL0Cu9/rf50Hi0u/g4=
+github.com/bytedance/sonic v1.11.2 h1:ywfwo0a/3j9HR8wsYGWsIWl2mvRsI950HyoxiBERw5A=
+github.com/bytedance/sonic v1.11.2/go.mod h1:iZcSUejdk5aukTND/Eu/ivjQuEL0Cu9/rf50Hi0u/g4=
+github.com/bytedance/sonic v1.11.3 h1:jRN+yEjakWh8aK5FzrciUHG8OFXK+4/KrAX/ysEtHAA=
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@@ -86,18 +159,35 @@ github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjY
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@@ -106,10 +196,10 @@ github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o
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@@ -121,48 +211,79 @@ github.com/xdg-go/stringprep v1.0.4/go.mod h1:mPGuuIYwz7CmR2bT9j4GbQqutWS1zV24gi
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 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
-golang.org/x/net v0.16.0 h1:7eBu7KsSvFDtSXUIDbh3aqlK4DPsZ1rByC8PFfBThos=
-golang.org/x/net v0.16.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
-golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM=
-golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
-golang.org/x/net v0.18.0 h1:mIYleuAkSbHh0tCv7RvjL3F6ZVbLjq4+R7zbOn3Kokg=
-golang.org/x/net v0.18.0/go.mod h1:/czyP5RqHAH4odGYxBJ1qz0+CE5WZ+2j1YgoEo8F2jQ=
 golang.org/x/net v0.19.0 h1:zTwKpTd2XuCqf8huc7Fo2iSy+4RHPd10s4KzeTnVr1c=
 golang.org/x/net v0.19.0/go.mod h1:CfAk/cbD4CthTvqiEl8NpboMuiuOYsAr/7NOjZJtv1U=
+golang.org/x/net v0.20.0 h1:aCL9BSgETF1k+blQaYUBx9hJ9LOGP3gAVemcZlf1Kpo=
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 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.4.0 h1:zxkM55ReGkDlKSM+Fu41A+zmbZuaPVbGMzvvdUPznYQ=
+golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
-golang.org/x/sync v0.4.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
+golang.org/x/sync v0.7.0 h1:YsImfSBoP9QPYL0xyKJPq0gcaJdG3rInoqxTWbfQu9M=
-golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -174,43 +295,73 @@ golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.13.0 h1:Af8nKPmuFypiUBjVoU9V20FiaFXOcuZI21p0ycVYYGE=
+golang.org/x/sys v0.16.0 h1:xWw16ngr6ZMtmxDyKyIgsE93KNKz5HKmMa3b8ALHidU=
-golang.org/x/sys v0.13.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.16.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
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-golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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-golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
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 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
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-golang.org/x/term v0.13.0/go.mod h1:LTmsnFJwVN6bCy1rVCoS+qHT1HhALEFxKncY3WNNh4U=
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 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/text v0.3.8/go.mod h1:E6s5w1FMmriuDzIBO73fBruAKo1PCIq6d2Q6DHfQ8WQ=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
-golang.org/x/text v0.13.0 h1:ablQoSUd0tRdKxZewP80B+BaqeKJuVhuRxj/dkrun3k=
-golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
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 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
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 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 h1:+cNy6SZtPcJQH3LJVLOSmiC7MMxXNOb3PU/VUEz+EhU=
-google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
+golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028/go.mod h1:NDW/Ps6MPRej6fsCIbMTohpP40sJ/P/vI1MoTEGwX90=
-google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
+google.golang.org/protobuf v1.32.0 h1:pPC6BG5ex8PDFnkbrGU3EixyhKcQ2aDuBS36lqK/C7I=
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 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+modernc.org/libc v1.37.6 h1:orZH3c5wmhIQFTXF+Nt+eeauyd+ZIt2BX6ARe+kD+aw=
+modernc.org/libc v1.37.6/go.mod h1:YAXkAZ8ktnkCKaN9sw/UDeUVkGYJ/YquGO4FTi5nmHE=
+modernc.org/mathutil v1.6.0 h1:fRe9+AmYlaej+64JsEEhoWuAYBkOtQiMEU7n/XgfYi4=
+modernc.org/mathutil v1.6.0/go.mod h1:Ui5Q9q1TR2gFm0AQRqQUaBWFLAhQpCwNcuhBOSedWPo=
+modernc.org/memory v1.7.2 h1:Klh90S215mmH8c9gO98QxQFsY+W451E8AnzjoE2ee1E=
+modernc.org/memory v1.7.2/go.mod h1:NO4NVCQy0N7ln+T9ngWqOQfi7ley4vpwvARR+Hjw95E=
+modernc.org/sqlite v1.28.0 h1:Zx+LyDDmXczNnEQdvPuEfcFVA2ZPyaD7UCZDjef3BHQ=
+modernc.org/sqlite v1.28.0/go.mod h1:Qxpazz0zH8Z1xCFyi5GSL3FzbtZ3fvbjmywNogldEW0=
 nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=

goextVersion.go

@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.341"
+const GoextVersion = "0.0.481"
 
-const GoextVersionTimestamp = "2023-12-07T14:43:12+0100"
+const GoextVersionTimestamp = "2024-07-04T16:24:49+0200"

gojson/decode.go

@@ -217,6 +217,7 @@ type decodeState struct {
 	savedError            error
 	useNumber             bool
 	disallowUnknownFields bool
+	tagkey                *string
 }
 
 // readIndex returns the position of the last byte read.
@@ -652,7 +653,11 @@ func (d *decodeState) object(v reflect.Value) error {
 			v.Set(reflect.MakeMap(t))
 		}
 	case reflect.Struct:
-		fields = cachedTypeFields(t)
+		tagkey := "json"
+		if d.tagkey != nil {
+			tagkey = *d.tagkey
+		}
+		fields = cachedTypeFields(t, tagkey)
 		// ok
 	default:
 		d.saveError(&UnmarshalTypeError{Value: "object", Type: t, Offset: int64(d.off)})

gojson/encode.go

@@ -382,7 +382,12 @@ func isEmptyValue(v reflect.Value) bool {
 }
 
 func (e *encodeState) reflectValue(v reflect.Value, opts encOpts) {
-	valueEncoder(v)(e, v, opts)
+	tagkey := "json"
+	if opts.tagkey != nil {
+		tagkey = *opts.tagkey
+	}
+
+	valueEncoder(v, tagkey)(e, v, opts)
 }
 
 type encOpts struct {
@@ -397,20 +402,22 @@ type encOpts struct {
 	// filter matches jsonfilter tag of struct
 	// marshals if no jsonfilter is set or otherwise if jsonfilter has the filter value
 	filter *string
+	// use different tag instead of "json"
+	tagkey *string
 }
 
 type encoderFunc func(e *encodeState, v reflect.Value, opts encOpts)
 
 var encoderCache sync.Map // map[reflect.Type]encoderFunc
 
-func valueEncoder(v reflect.Value) encoderFunc {
+func valueEncoder(v reflect.Value, tagkey string) encoderFunc {
 	if !v.IsValid() {
 		return invalidValueEncoder
 	}
-	return typeEncoder(v.Type())
+	return typeEncoder(v.Type(), tagkey)
 }
 
-func typeEncoder(t reflect.Type) encoderFunc {
+func typeEncoder(t reflect.Type, tagkey string) encoderFunc {
 	if fi, ok := encoderCache.Load(t); ok {
 		return fi.(encoderFunc)
 	}
@@ -433,7 +440,7 @@ func typeEncoder(t reflect.Type) encoderFunc {
 	}
 
 	// Compute the real encoder and replace the indirect func with it.
-	f = newTypeEncoder(t, true)
+	f = newTypeEncoder(t, true, tagkey)
 	wg.Done()
 	encoderCache.Store(t, f)
 	return f
@@ -446,19 +453,19 @@ var (
 
 // newTypeEncoder constructs an encoderFunc for a type.
 // The returned encoder only checks CanAddr when allowAddr is true.
-func newTypeEncoder(t reflect.Type, allowAddr bool) encoderFunc {
+func newTypeEncoder(t reflect.Type, allowAddr bool, tagkey string) encoderFunc {
 	// If we have a non-pointer value whose type implements
 	// Marshaler with a value receiver, then we're better off taking
 	// the address of the value - otherwise we end up with an
 	// allocation as we cast the value to an interface.
 	if t.Kind() != reflect.Pointer && allowAddr && reflect.PointerTo(t).Implements(marshalerType) {
-		return newCondAddrEncoder(addrMarshalerEncoder, newTypeEncoder(t, false))
+		return newCondAddrEncoder(addrMarshalerEncoder, newTypeEncoder(t, false, tagkey))
 	}
 	if t.Implements(marshalerType) {
 		return marshalerEncoder
 	}
 	if t.Kind() != reflect.Pointer && allowAddr && reflect.PointerTo(t).Implements(textMarshalerType) {
-		return newCondAddrEncoder(addrTextMarshalerEncoder, newTypeEncoder(t, false))
+		return newCondAddrEncoder(addrTextMarshalerEncoder, newTypeEncoder(t, false, tagkey))
 	}
 	if t.Implements(textMarshalerType) {
 		return textMarshalerEncoder
@@ -480,15 +487,15 @@ func newTypeEncoder(t reflect.Type, allowAddr bool) encoderFunc {
 	case reflect.Interface:
 		return interfaceEncoder
 	case reflect.Struct:
-		return newStructEncoder(t)
+		return newStructEncoder(t, tagkey)
 	case reflect.Map:
-		return newMapEncoder(t)
+		return newMapEncoder(t, tagkey)
 	case reflect.Slice:
-		return newSliceEncoder(t)
+		return newSliceEncoder(t, tagkey)
 	case reflect.Array:
-		return newArrayEncoder(t)
+		return newArrayEncoder(t, tagkey)
 	case reflect.Pointer:
-		return newPtrEncoder(t)
+		return newPtrEncoder(t, tagkey)
 	default:
 		return unsupportedTypeEncoder
 	}
@@ -801,8 +808,8 @@ FieldLoop:
 	}
 }
 
-func newStructEncoder(t reflect.Type) encoderFunc {
+func newStructEncoder(t reflect.Type, tagkey string) encoderFunc {
-	se := structEncoder{fields: cachedTypeFields(t)}
+	se := structEncoder{fields: cachedTypeFields(t, tagkey)}
 	return se.encode
 }
 
@@ -855,7 +862,7 @@ func (me mapEncoder) encode(e *encodeState, v reflect.Value, opts encOpts) {
 	e.ptrLevel--
 }
 
-func newMapEncoder(t reflect.Type) encoderFunc {
+func newMapEncoder(t reflect.Type, tagkey string) encoderFunc {
 	switch t.Key().Kind() {
 	case reflect.String,
 		reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
@@ -865,7 +872,7 @@ func newMapEncoder(t reflect.Type) encoderFunc {
 			return unsupportedTypeEncoder
 		}
 	}
-	me := mapEncoder{typeEncoder(t.Elem())}
+	me := mapEncoder{typeEncoder(t.Elem(), tagkey)}
 	return me.encode
 }
 
@@ -936,7 +943,7 @@ func (se sliceEncoder) encode(e *encodeState, v reflect.Value, opts encOpts) {
 	e.ptrLevel--
 }
 
-func newSliceEncoder(t reflect.Type) encoderFunc {
+func newSliceEncoder(t reflect.Type, tagkey string) encoderFunc {
 	// Byte slices get special treatment; arrays don't.
 	if t.Elem().Kind() == reflect.Uint8 {
 		p := reflect.PointerTo(t.Elem())
@@ -944,7 +951,7 @@ func newSliceEncoder(t reflect.Type) encoderFunc {
 			return encodeByteSlice
 		}
 	}
-	enc := sliceEncoder{newArrayEncoder(t)}
+	enc := sliceEncoder{newArrayEncoder(t, tagkey)}
 	return enc.encode
 }
 
@@ -964,8 +971,8 @@ func (ae arrayEncoder) encode(e *encodeState, v reflect.Value, opts encOpts) {
 	e.WriteByte(']')
 }
 
-func newArrayEncoder(t reflect.Type) encoderFunc {
+func newArrayEncoder(t reflect.Type, tagkey string) encoderFunc {
-	enc := arrayEncoder{typeEncoder(t.Elem())}
+	enc := arrayEncoder{typeEncoder(t.Elem(), tagkey)}
 	return enc.encode
 }
 
@@ -992,8 +999,8 @@ func (pe ptrEncoder) encode(e *encodeState, v reflect.Value, opts encOpts) {
 	e.ptrLevel--
 }
 
-func newPtrEncoder(t reflect.Type) encoderFunc {
+func newPtrEncoder(t reflect.Type, tagkey string) encoderFunc {
-	enc := ptrEncoder{typeEncoder(t.Elem())}
+	enc := ptrEncoder{typeEncoder(t.Elem(), tagkey)}
 	return enc.encode
 }
 
@@ -1270,7 +1277,7 @@ func (x byIndex) Less(i, j int) bool {
 // typeFields returns a list of fields that JSON should recognize for the given type.
 // The algorithm is breadth-first search over the set of structs to include - the top struct
 // and then any reachable anonymous structs.
-func typeFields(t reflect.Type) structFields {
+func typeFields(t reflect.Type, tagkey string) structFields {
 	// Anonymous fields to explore at the current level and the next.
 	current := []field{}
 	next := []field{{typ: t}}
@@ -1315,7 +1322,7 @@ func typeFields(t reflect.Type) structFields {
 					// Ignore unexported non-embedded fields.
 					continue
 				}
-				tag := sf.Tag.Get("json")
+				tag := sf.Tag.Get(tagkey)
 				if tag == "-" {
 					continue
 				}
@@ -1449,7 +1456,7 @@ func typeFields(t reflect.Type) structFields {
 
 	for i := range fields {
 		f := &fields[i]
-		f.encoder = typeEncoder(typeByIndex(t, f.index))
+		f.encoder = typeEncoder(typeByIndex(t, f.index), tagkey)
 	}
 	nameIndex := make(map[string]int, len(fields))
 	for i, field := range fields {
@@ -1474,13 +1481,26 @@ func dominantField(fields []field) (field, bool) {
 	return fields[0], true
 }
 
-var fieldCache sync.Map // map[reflect.Type]structFields
+var fieldCache sync.Map // map[string]map[reflect.Type]structFields
 
 // cachedTypeFields is like typeFields but uses a cache to avoid repeated work.
-func cachedTypeFields(t reflect.Type) structFields {
+func cachedTypeFields(t reflect.Type, tagkey string) structFields {
-	if f, ok := fieldCache.Load(t); ok {
+	if m0, ok := fieldCache.Load(tagkey); ok {
+
+		if f, ok := m0.(*sync.Map).Load(t); ok {
+			return f.(structFields)
+		}
+		f, _ := m0.(*sync.Map).LoadOrStore(t, typeFields(t, tagkey))
+		return f.(structFields)
+
+	} else {
+
+		m0 := &sync.Map{}
+		f, _ := m0.LoadOrStore(t, typeFields(t, tagkey))
+
+		fieldCache.Store(tagkey, m0)
+
 		return f.(structFields)
 	}
-	f, _ := fieldCache.LoadOrStore(t, typeFields(t))
+
-	return f.(structFields)
 }

gojson/gionic.go

@@ -37,6 +37,14 @@ func (r GoJsonRender) Render(w http.ResponseWriter) error {
 	return nil
 }
 
+func (r GoJsonRender) RenderString() (string, error) {
+	jsonBytes, err := MarshalSafeCollections(r.Data, r.NilSafeSlices, r.NilSafeMaps, r.Indent, r.Filter)
+	if err != nil {
+		panic(err)
+	}
+	return string(jsonBytes), nil
+}
+
 func (r GoJsonRender) WriteContentType(w http.ResponseWriter) {
 	header := w.Header()
 	if val := header["Content-Type"]; len(val) == 0 {

gojson/stream.go

@@ -41,6 +41,9 @@ func (dec *Decoder) UseNumber() { dec.d.useNumber = true }
 // non-ignored, exported fields in the destination.
 func (dec *Decoder) DisallowUnknownFields() { dec.d.disallowUnknownFields = true }
 
+// TagKey sets a different TagKey (instead of "json")
+func (dec *Decoder) TagKey(v string) { dec.d.tagkey = &v }
+
 // Decode reads the next JSON-encoded value from its
 // input and stores it in the value pointed to by v.
 //

googleapi/mimeMessage_test.go

@@ -1,7 +1,6 @@
 package googleapi
 
 import (
-	"fmt"
 	"gogs.mikescher.com/BlackForestBytes/goext/tst"
 	"os"
 	"testing"
@@ -18,7 +17,7 @@ func TestEncodeMimeMail(t *testing.T) {
 		MailBody{Plain: "Plain Text"},
 		nil)
 
-	fmt.Printf("%s\n\n", mail)
+	verifyMime(mail)
 }
 
 func TestEncodeMimeMail2(t *testing.T) {
@@ -35,7 +34,7 @@ func TestEncodeMimeMail2(t *testing.T) {
 		},
 		nil)
 
-	fmt.Printf("%s\n\n", mail)
+	verifyMime(mail)
 }
 
 func TestEncodeMimeMail3(t *testing.T) {
@@ -53,12 +52,12 @@ func TestEncodeMimeMail3(t *testing.T) {
 			{Data: []byte("HelloWorld"), Filename: "test.txt", IsInline: false, ContentType: "text/plain"},
 		})
 
-	fmt.Printf("%s\n\n", mail)
+	verifyMime(mail)
 }
 
 func TestEncodeMimeMail4(t *testing.T) {
 
-	b := tst.Must(os.ReadFile("/home/mike/Pictures/Screenshot_20220706_190205.png"))(t)
+	b := tst.Must(os.ReadFile("test_placeholder.png"))(t)
 
 	mail := encodeMimeMail(
 		"noreply@heydyno.de",
@@ -73,5 +72,9 @@ func TestEncodeMimeMail4(t *testing.T) {
 			{Data: b, Filename: "img.png", IsInline: true, ContentType: "image/png"},
 		})
 
-	fmt.Printf("%s\n\n", mail)
+	verifyMime(mail)
+}
+
+func verifyMime(mail string) {
+	//fmt.Printf("%s\n\n", mail)
 }

googleapi/sendMail_test.go

@@ -127,7 +127,7 @@ func TestSendMail4(t *testing.T) {
 
 	gclient := NewGoogleClient(auth)
 
-	b := tst.Must(os.ReadFile("/home/mike/Pictures/Screenshot_20220706_190205.png"))(t)
+	b := tst.Must(os.ReadFile("test_placeholder.png"))(t)
 
 	mail, err := gclient.SendMail(
 		ctx,

imageext/enums.go

@@ -0,0 +1,3 @@
+package imageext
+
+//go:generate go run ../_gen/enum-generate.go -- enums_gen.go

imageext/enums_gen.go

@@ -0,0 +1,216 @@
+// Code generated by enum-generate.go DO NOT EDIT.
+
+package imageext
+
+import "gogs.mikescher.com/BlackForestBytes/goext/langext"
+import "gogs.mikescher.com/BlackForestBytes/goext/enums"
+
+const ChecksumEnumGenerator = "1da5383c33ee442fd0b899369053f66bdc85bed2dbf906949d3edfeedfe13340" // GoExtVersion: 0.0.449
+
+// ================================ ImageFit ================================
+//
+// File:       image.go
+// StringEnum: true
+// DescrEnum:  false
+// DataEnum:   false
+//
+
+var __ImageFitValues = []ImageFit{
+	ImageFitStretch,
+	ImageFitCover,
+	ImageFitContainCenter,
+	ImageFitContainTopLeft,
+	ImageFitContainTopRight,
+	ImageFitContainBottomLeft,
+	ImageFitContainBottomRight,
+}
+
+var __ImageFitVarnames = map[ImageFit]string{
+	ImageFitStretch:            "ImageFitStretch",
+	ImageFitCover:              "ImageFitCover",
+	ImageFitContainCenter:      "ImageFitContainCenter",
+	ImageFitContainTopLeft:     "ImageFitContainTopLeft",
+	ImageFitContainTopRight:    "ImageFitContainTopRight",
+	ImageFitContainBottomLeft:  "ImageFitContainBottomLeft",
+	ImageFitContainBottomRight: "ImageFitContainBottomRight",
+}
+
+func (e ImageFit) Valid() bool {
+	return langext.InArray(e, __ImageFitValues)
+}
+
+func (e ImageFit) Values() []ImageFit {
+	return __ImageFitValues
+}
+
+func (e ImageFit) ValuesAny() []any {
+	return langext.ArrCastToAny(__ImageFitValues)
+}
+
+func (e ImageFit) ValuesMeta() []enums.EnumMetaValue {
+	return ImageFitValuesMeta()
+}
+
+func (e ImageFit) String() string {
+	return string(e)
+}
+
+func (e ImageFit) VarName() string {
+	if d, ok := __ImageFitVarnames[e]; ok {
+		return d
+	}
+	return ""
+}
+
+func (e ImageFit) TypeName() string {
+	return "ImageFit"
+}
+
+func (e ImageFit) PackageName() string {
+	return "media"
+}
+
+func (e ImageFit) Meta() enums.EnumMetaValue {
+	return enums.EnumMetaValue{VarName: e.VarName(), Value: e, Description: nil}
+}
+
+func ParseImageFit(vv string) (ImageFit, bool) {
+	for _, ev := range __ImageFitValues {
+		if string(ev) == vv {
+			return ev, true
+		}
+	}
+	return "", false
+}
+
+func ImageFitValues() []ImageFit {
+	return __ImageFitValues
+}
+
+func ImageFitValuesMeta() []enums.EnumMetaValue {
+	return []enums.EnumMetaValue{
+		ImageFitStretch.Meta(),
+		ImageFitCover.Meta(),
+		ImageFitContainCenter.Meta(),
+		ImageFitContainTopLeft.Meta(),
+		ImageFitContainTopRight.Meta(),
+		ImageFitContainBottomLeft.Meta(),
+		ImageFitContainBottomRight.Meta(),
+	}
+}
+
+// ================================ ImageCompresson ================================
+//
+// File:       image.go
+// StringEnum: true
+// DescrEnum:  false
+// DataEnum:   false
+//
+
+var __ImageCompressonValues = []ImageCompresson{
+	CompressionPNGNone,
+	CompressionPNGSpeed,
+	CompressionPNGBest,
+	CompressionJPEG100,
+	CompressionJPEG90,
+	CompressionJPEG80,
+	CompressionJPEG70,
+	CompressionJPEG60,
+	CompressionJPEG50,
+	CompressionJPEG25,
+	CompressionJPEG10,
+	CompressionJPEG1,
+}
+
+var __ImageCompressonVarnames = map[ImageCompresson]string{
+	CompressionPNGNone:  "CompressionPNGNone",
+	CompressionPNGSpeed: "CompressionPNGSpeed",
+	CompressionPNGBest:  "CompressionPNGBest",
+	CompressionJPEG100:  "CompressionJPEG100",
+	CompressionJPEG90:   "CompressionJPEG90",
+	CompressionJPEG80:   "CompressionJPEG80",
+	CompressionJPEG70:   "CompressionJPEG70",
+	CompressionJPEG60:   "CompressionJPEG60",
+	CompressionJPEG50:   "CompressionJPEG50",
+	CompressionJPEG25:   "CompressionJPEG25",
+	CompressionJPEG10:   "CompressionJPEG10",
+	CompressionJPEG1:    "CompressionJPEG1",
+}
+
+func (e ImageCompresson) Valid() bool {
+	return langext.InArray(e, __ImageCompressonValues)
+}
+
+func (e ImageCompresson) Values() []ImageCompresson {
+	return __ImageCompressonValues
+}
+
+func (e ImageCompresson) ValuesAny() []any {
+	return langext.ArrCastToAny(__ImageCompressonValues)
+}
+
+func (e ImageCompresson) ValuesMeta() []enums.EnumMetaValue {
+	return ImageCompressonValuesMeta()
+}
+
+func (e ImageCompresson) String() string {
+	return string(e)
+}
+
+func (e ImageCompresson) VarName() string {
+	if d, ok := __ImageCompressonVarnames[e]; ok {
+		return d
+	}
+	return ""
+}
+
+func (e ImageCompresson) TypeName() string {
+	return "ImageCompresson"
+}
+
+func (e ImageCompresson) PackageName() string {
+	return "media"
+}
+
+func (e ImageCompresson) Meta() enums.EnumMetaValue {
+	return enums.EnumMetaValue{VarName: e.VarName(), Value: e, Description: nil}
+}
+
+func ParseImageCompresson(vv string) (ImageCompresson, bool) {
+	for _, ev := range __ImageCompressonValues {
+		if string(ev) == vv {
+			return ev, true
+		}
+	}
+	return "", false
+}
+
+func ImageCompressonValues() []ImageCompresson {
+	return __ImageCompressonValues
+}
+
+func ImageCompressonValuesMeta() []enums.EnumMetaValue {
+	return []enums.EnumMetaValue{
+		CompressionPNGNone.Meta(),
+		CompressionPNGSpeed.Meta(),
+		CompressionPNGBest.Meta(),
+		CompressionJPEG100.Meta(),
+		CompressionJPEG90.Meta(),
+		CompressionJPEG80.Meta(),
+		CompressionJPEG70.Meta(),
+		CompressionJPEG60.Meta(),
+		CompressionJPEG50.Meta(),
+		CompressionJPEG25.Meta(),
+		CompressionJPEG10.Meta(),
+		CompressionJPEG1.Meta(),
+	}
+}
+
+// ================================ ================= ================================
+
+func AllPackageEnums() []enums.Enum {
+	return []enums.Enum{
+		ImageFitStretch,    // ImageFit
+		CompressionPNGNone, // ImageCompresson
+	}
+}

imageext/image.go

@@ -0,0 +1,321 @@
+package imageext
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/disintegration/imaging"
+	"gogs.mikescher.com/BlackForestBytes/goext/exerr"
+	"gogs.mikescher.com/BlackForestBytes/goext/mathext"
+	"image"
+	"image/color"
+	"image/draw"
+	"image/jpeg"
+	"image/png"
+	"io"
+	"math"
+)
+
+type ImageFit string //@enum:type
+
+const (
+	ImageFitStretch            ImageFit = "STRETCH"
+	ImageFitCover              ImageFit = "COVER"
+	ImageFitContainCenter      ImageFit = "CONTAIN_CENTER"
+	ImageFitContainTopLeft     ImageFit = "CONTAIN_TOPLEFT"
+	ImageFitContainTopRight    ImageFit = "CONTAIN_TOPRIGHT"
+	ImageFitContainBottomLeft  ImageFit = "CONTAIN_BOTTOMLEFT"
+	ImageFitContainBottomRight ImageFit = "CONTAIN_BOTTOMRIGHT"
+)
+
+type ImageCrop struct { // all crop values are percentages!
+
+	CropX      float64 `bson:"cropX"      json:"cropX"`
+	CropY      float64 `bson:"cropY"      json:"cropY"`
+	CropWidth  float64 `bson:"cropWidth"  json:"cropWidth"`
+	CropHeight float64 `bson:"cropHeight" json:"cropHeight"`
+}
+
+type ImageCompresson string //@enum:type
+
+const (
+	CompressionPNGNone  ImageCompresson = "PNG_NONE"
+	CompressionPNGSpeed ImageCompresson = "PNG_SPEED"
+	CompressionPNGBest  ImageCompresson = "PNG_BEST"
+	CompressionJPEG100  ImageCompresson = "JPEG_100"
+	CompressionJPEG90   ImageCompresson = "JPEG_090"
+	CompressionJPEG80   ImageCompresson = "JPEG_080"
+	CompressionJPEG70   ImageCompresson = "JPEG_070"
+	CompressionJPEG60   ImageCompresson = "JPEG_060"
+	CompressionJPEG50   ImageCompresson = "JPEG_050"
+	CompressionJPEG25   ImageCompresson = "JPEG_025"
+	CompressionJPEG10   ImageCompresson = "JPEG_010"
+	CompressionJPEG1    ImageCompresson = "JPEG_001"
+)
+
+func CropImage(img image.Image, px float64, py float64, pw float64, ph float64) (image.Image, error) {
+
+	type subImager interface {
+		SubImage(r image.Rectangle) image.Image
+	}
+
+	x := int(float64(img.Bounds().Dx()) * px)
+	y := int(float64(img.Bounds().Dy()) * py)
+	w := int(float64(img.Bounds().Dx()) * pw)
+	h := int(float64(img.Bounds().Dy()) * ph)
+
+	if simg, ok := img.(subImager); ok {
+
+		return simg.SubImage(image.Rect(x, y, x+w, y+h)), nil
+
+	} else {
+
+		bfr1 := bytes.Buffer{}
+		err := png.Encode(&bfr1, img)
+		if err != nil {
+			return nil, exerr.Wrap(err, "").Build()
+		}
+		imgPNG, err := png.Decode(&bfr1)
+		if err != nil {
+			return nil, exerr.Wrap(err, "").Build()
+		}
+
+		return imgPNG.(subImager).SubImage(image.Rect(x, y, w+w, y+h)), nil
+	}
+}
+
+func EncodeImage(img image.Image, compression ImageCompresson) (bytes.Buffer, string, error) {
+	var err error
+
+	bfr := bytes.Buffer{}
+
+	switch compression {
+	case CompressionPNGNone:
+		enc := &png.Encoder{CompressionLevel: png.NoCompression}
+		err = enc.Encode(&bfr, img)
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/png", nil
+	case CompressionPNGSpeed:
+		enc := &png.Encoder{CompressionLevel: png.BestSpeed}
+		err = enc.Encode(&bfr, img)
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/png", nil
+	case CompressionPNGBest:
+		enc := &png.Encoder{CompressionLevel: png.BestCompression}
+		err = enc.Encode(&bfr, img)
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/png", nil
+	case CompressionJPEG100:
+		err = jpeg.Encode(&bfr, img, &jpeg.Options{Quality: 100})
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/jpeg", nil
+	case CompressionJPEG90:
+		err = jpeg.Encode(&bfr, img, &jpeg.Options{Quality: 90})
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/jpeg", nil
+	case CompressionJPEG80:
+		err = jpeg.Encode(&bfr, img, &jpeg.Options{Quality: 80})
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/jpeg", nil
+	case CompressionJPEG70:
+		err = jpeg.Encode(&bfr, img, &jpeg.Options{Quality: 70})
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/jpeg", nil
+	case CompressionJPEG60:
+		err = jpeg.Encode(&bfr, img, &jpeg.Options{Quality: 60})
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/jpeg", nil
+	case CompressionJPEG50:
+		err = jpeg.Encode(&bfr, img, &jpeg.Options{Quality: 50})
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/jpeg", nil
+	case CompressionJPEG25:
+		err = jpeg.Encode(&bfr, img, &jpeg.Options{Quality: 25})
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/jpeg", nil
+	case CompressionJPEG10:
+		err = jpeg.Encode(&bfr, img, &jpeg.Options{Quality: 10})
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/jpeg", nil
+	case CompressionJPEG1:
+		err = jpeg.Encode(&bfr, img, &jpeg.Options{Quality: 1})
+		if err != nil {
+			return bytes.Buffer{}, "", exerr.Wrap(err, "").Build()
+		}
+		return bfr, "image/jpeg", nil
+	default:
+		return bytes.Buffer{}, "", exerr.New(exerr.TypeInternal, "unknown compression method: "+compression.String()).Build()
+	}
+}
+
+func ObjectFitImage(img image.Image, bbw float64, bbh float64, fit ImageFit, fillColor color.Color) (image.Image, error) {
+
+	iw := img.Bounds().Size().X
+	ih := img.Bounds().Size().Y
+
+	// [iw, ih]   is the size of the image
+	// [bbw, bbh] is the target bounding box,
+	//             - it specifies the target ratio
+	//             - and the maximal target resolution
+
+	facW := float64(iw) / bbw
+	facH := float64(ih) / bbh
+
+	// facW is the ratio between iw and bbw
+	//  - it is the factor by which the bounding box must be multiplied to reach the image size (in the x-axis)
+	//
+	// (same is true for facH, but for the height and y-axis)
+
+	if fit == ImageFitCover {
+
+		// image-fit:cover completely fills the target-bounding-box, it potentially cuts parts of the image away
+
+		// we use the smaller (!) value of facW and facH, because we want to have the smallest possible destination rect (due to file size)
+		// and because the image is made to completely fill the bounding-box, the smaller factor (= teh dimension the image is stretched more) is relevant
+
+		// but we cap `fac` at 1 (can be larger than 1)
+		// a value >1 would mean the final image resolution is biger than the bounding box, which we do not want.
+
+		// if the initial image (iw, ih) is already bigger than the bounding box (bbw, bbh), facW and facH are always >1 and fac will be 1
+		// which means we will simply use the bounding box as destination rect (and scale the image down)
+
+		fac := mathext.Clamp(mathext.Min(facW, facH), 0.0, 1.0)
+
+		// we scale the bounding box by fac (both dimension the same amount, to keep the bounding-box ratio)
+
+		w := int(math.Round(bbw * fac))
+		h := int(math.Round(bbh * fac))
+
+		img = imaging.Fill(img, w, h, imaging.Center, imaging.Lanczos)
+
+		newImg := image.NewRGBA(image.Rect(0, 0, w, h))
+
+		draw.Draw(newImg, newImg.Bounds(), &image.Uniform{C: fillColor}, image.Pt(0, 0), draw.Src)
+		draw.Draw(newImg, newImg.Bounds(), img, image.Pt(0, 0), draw.Over)
+
+		return newImg, nil
+	}
+
+	if fit == ImageFitContainCenter || fit == ImageFitContainTopLeft || fit == ImageFitContainTopRight || fit == ImageFitContainBottomLeft || fit == ImageFitContainBottomRight {
+
+		// image-fit:cover fills the target-bounding-box with the image, there is potentially empty-space, it potentially cuts parts of the image away
+
+		// we use the bigger (!) value of facW and facH,
+		// because the image is made to fit the bounding-box, the bigger factor (= the dimension the image is stretched less) is relevant
+
+		// but we cap `fac` at 1 (can be larger than 1)
+		// a value >1 would mean the final image resolution is biger than the bounding box, which we do not want.
+
+		// if the initial image (iw, ih) is already bigger than the bounding box (bbw, bbh), facW and facH are always >1 and fac will be 1
+		// which means we will simply use the bounding box as destination rect (and scale the image down)
+
+		facOut := mathext.Clamp(mathext.Max(facW, facH), 0.0, 1.0)
+
+		// we scale the bounding box by fac (both dimension the same amount, to keep the bounding-box ratio)
+
+		// [ow|oh] ==> size of output image (same ratio as bounding box [bbw|bbh])
+
+		ow := int(math.Round(bbw * facOut))
+		oh := int(math.Round(bbh * facOut))
+
+		facScale := mathext.Min(float64(ow)/float64(iw), float64(oh)/float64(ih))
+
+		// [dw|dh] ==> size of destination rect (where to draw source in output image) (same ratio as input image [iw|ih])
+
+		dw := int(math.Round(float64(iw) * facScale))
+		dh := int(math.Round(float64(ih) * facScale))
+
+		img = imaging.Resize(img, dw, dh, imaging.Lanczos)
+
+		var destBounds image.Rectangle
+		if fit == ImageFitContainCenter {
+			destBounds = image.Rect((ow-dw)/2, (oh-dh)/2, (ow-dw)/2+dw, (oh-dh)/2+dh)
+		} else if fit == ImageFitContainTopLeft {
+			destBounds = image.Rect(0, 0, dw, dh)
+		} else if fit == ImageFitContainTopRight {
+			destBounds = image.Rect(ow-dw, 0, ow, dh)
+		} else if fit == ImageFitContainBottomLeft {
+			destBounds = image.Rect(0, oh-dh, dw, oh)
+		} else if fit == ImageFitContainBottomRight {
+			destBounds = image.Rect(ow-dw, oh-dh, ow, oh)
+		}
+
+		newImg := image.NewRGBA(image.Rect(0, 0, ow, oh))
+
+		draw.Draw(newImg, newImg.Bounds(), &image.Uniform{C: fillColor}, image.Pt(0, 0), draw.Src)
+		draw.Draw(newImg, destBounds, img, image.Pt(0, 0), draw.Over)
+
+		return newImg, nil
+	}
+
+	if fit == ImageFitStretch {
+
+		// image-fit:stretch simply stretches the image to the bounding box
+
+		// we use the bigger value of [facW;facH], to (potentially) scale the bounding box down before applying it
+		// theoretically we could directly use [bbw, bbh] in the call to imaging.Resize,
+		// but if the image is (a lot) smaller than the bouding box it is useful to scale it down to reduce final pdf filesize
+
+		// we also cap fac at 1, because we never want the final rect to be bigger than the inputted bounding box (see comments at start of method)
+
+		fac := mathext.Clamp(mathext.Max(facW, facH), 0.0, 1.0)
+
+		// we scale the bounding box by fac (both dimension the same amount, to keep the bounding-box ratio)
+
+		w := int(math.Round(bbw * fac))
+		h := int(math.Round(bbh * fac))
+
+		img = imaging.Resize(img, w, h, imaging.Lanczos)
+
+		newImg := image.NewRGBA(image.Rect(0, 0, w, h))
+
+		draw.Draw(newImg, newImg.Bounds(), &image.Uniform{C: fillColor}, image.Pt(0, 0), draw.Src)
+		draw.Draw(newImg, newImg.Bounds(), img, image.Pt(0, 0), draw.Over)
+
+		return newImg, nil
+	}
+
+	return nil, exerr.New(exerr.TypeInternal, fmt.Sprintf("unknown image-fit: '%s'", fit)).Build()
+}
+
+func VerifyAndDecodeImage(data io.Reader, mime string) (image.Image, error) {
+
+	if mime == "image/jpeg" {
+		img, err := jpeg.Decode(data)
+		if err != nil {
+			return nil, exerr.Wrap(err, "failed to decode blob as jpeg").WithType(exerr.TypeInvalidImage).Build()
+		}
+		return img, nil
+	}
+
+	if mime == "image/png" {
+		img, err := png.Decode(data)
+		if err != nil {
+			return nil, exerr.Wrap(err, "failed to decode blob as png").WithType(exerr.TypeInvalidImage).Build()
+		}
+		return img, nil
+	}
+
+	return nil, exerr.New(exerr.TypeInvalidMimeType, fmt.Sprintf("unknown/invalid image mimetype: '%s'", mime)).Build()
+}

langext/array.go

@@ -59,6 +59,18 @@ func ArrUnique[T comparable](array []T) []T {
 	return result
 }
 
+func ArrUniqueStable[T comparable](array []T) []T {
+	hist := make(map[T]bool, len(array))
+	result := make([]T, 0, len(array))
+	for _, v := range array {
+		if _, ok := hist[v]; !ok {
+			hist[v] = true
+			result = append(result, v)
+		}
+	}
+	return result
+}
+
 func ArrEqualsExact[T comparable](arr1 []T, arr2 []T) bool {
 	if len(arr1) != len(arr2) {
 		return false
@@ -265,6 +277,15 @@ func ArrFirstIndex[T comparable](arr []T, needle T) int {
 	return -1
 }
 
+func ArrFirstIndexFunc[T any](arr []T, comp func(v T) bool) int {
+	for i, v := range arr {
+		if comp(v) {
+			return i
+		}
+	}
+	return -1
+}
+
 func ArrLastIndex[T comparable](arr []T, needle T) int {
 	result := -1
 	for i, v := range arr {
@@ -275,6 +296,16 @@ func ArrLastIndex[T comparable](arr []T, needle T) int {
 	return result
 }
 
+func ArrLastIndexFunc[T any](arr []T, comp func(v T) bool) int {
+	result := -1
+	for i, v := range arr {
+		if comp(v) {
+			result = i
+		}
+	}
+	return result
+}
+
 func AddToSet[T comparable](set []T, add T) []T {
 	for _, v := range set {
 		if v == add {
@@ -434,6 +465,26 @@ func ArrConcat[T any](arr ...[]T) []T {
 	return r
 }
 
+// ArrAppend works similar to append(x, y, z) - but doe snot touch the old array and creates a new one
+func ArrAppend[T any](arr []T, add ...T) []T {
+	r := ArrCopy(arr)
+	for _, v := range add {
+		r = append(r, v)
+	}
+	return r
+}
+
+// ArrPrepend works similar to append(x, y, z) - but doe snot touch the old array and creates a new one
+// Also - in contrast to ArrAppend - the add values are inserted at the start of the resulting array (in reverse order)
+func ArrPrepend[T any](arr []T, add ...T) []T {
+	out := make([]T, len(arr)+len(add))
+	copy(out[len(add):], arr)
+	for i := 0; i < len(add); i++ {
+		out[len(add)-i-1] = add[i]
+	}
+	return out
+}
+
 // ArrCopy does a shallow copy of the 'in' array
 func ArrCopy[T any](in []T) []T {
 	out := make([]T, len(in))
@@ -449,6 +500,10 @@ func ArrRemove[T comparable](arr []T, needle T) []T {
 	return arr
 }
 
+func ArrRemoveAt[T any](arr []T, idx int) []T {
+	return append(arr[:idx], arr[idx+1:]...)
+}
+
 func ArrExcept[T comparable](arr []T, needles ...T) []T {
 	r := make([]T, 0, len(arr))
 	rmlist := ArrToSet(needles)
@@ -479,3 +534,48 @@ func JoinString(arr []string, delimiter string) string {
 
 	return str
 }
+
+// ArrChunk splits the array into buckets of max-size `chunkSize`
+// order is being kept.
+// The last chunk may contain less than length elements.
+//
+// (chunkSize == -1) means no chunking
+//
+// see https://www.php.net/manual/en/function.array-chunk.php
+func ArrChunk[T any](arr []T, chunkSize int) [][]T {
+	if chunkSize == -1 {
+		return [][]T{arr}
+	}
+
+	res := make([][]T, 0, 1+len(arr)/chunkSize)
+
+	i := 0
+	for i < len(arr) {
+
+		right := i + chunkSize
+		if right >= len(arr) {
+			right = len(arr)
+		}
+
+		res = append(res, arr[i:right])
+
+		i = right
+	}
+
+	return res
+}
+
+func ArrGroupBy[T1 any, T2 comparable](arr []T1, groupfunc func(v T1) T2) map[T2][]T1 {
+	r := make(map[T2][]T1)
+
+	for _, v := range arr {
+		key := groupfunc(v)
+		if _, ok := r[key]; ok {
+			r[key] = append(r[key], v)
+		} else {
+			r[key] = []T1{v}
+		}
+	}
+
+	return r
+}

langext/array_test.go

@@ -2,6 +2,7 @@ package langext
 
 import (
 	"gogs.mikescher.com/BlackForestBytes/goext/tst"
+	"strings"
 	"testing"
 )
 
@@ -10,3 +11,13 @@ func TestJoinString(t *testing.T) {
 	res := JoinString(ids, ",")
 	tst.AssertEqual(t, res, "1,2,3")
 }
+
+func TestArrPrepend(t *testing.T) {
+	v1 := []string{"1", "2", "3"}
+
+	v2 := ArrPrepend(v1, "4", "5", "6")
+
+	tst.AssertEqual(t, strings.Join(v1, ""), "123")
+	tst.AssertEqual(t, strings.Join(v2, ""), "654123")
+
+}

langext/coalesce.go

@@ -5,12 +5,84 @@ import (
 	"time"
 )
 
-func Coalesce[T any](v *T, def T) T {
+func Coalesce[T any](v1 *T, def T) T {
-	if v == nil {
+	if v1 != nil {
-		return def
+		return *v1
-	} else {
-		return *v
 	}
+
+	return def
+}
+
+func CoalesceOpt[T any](v1 *T, v2 *T) *T {
+	if v1 != nil {
+		return v1
+	}
+
+	return v2
+}
+
+func Coalesce3[T any](v1 *T, v2 *T, def T) T {
+	if v1 != nil {
+		return *v1
+	}
+
+	if v2 != nil {
+		return *v2
+	}
+
+	return def
+}
+
+func Coalesce3Opt[T any](v1 *T, v2 *T, v3 *T) *T {
+	if v1 != nil {
+		return v1
+	}
+
+	if v2 != nil {
+		return v2
+	}
+
+	return v3
+}
+
+func Coalesce4[T any](v1 *T, v2 *T, v3 *T, def T) T {
+	if v1 != nil {
+		return *v1
+	}
+
+	if v2 != nil {
+		return *v2
+	}
+
+	if v3 != nil {
+		return *v3
+	}
+
+	return def
+}
+
+func Coalesce4Opt[T any](v1 *T, v2 *T, v3 *T, v4 *T) *T {
+	if v1 != nil {
+		return v1
+	}
+
+	if v2 != nil {
+		return v2
+	}
+
+	if v3 != nil {
+		return v3
+	}
+
+	return v4
+}
+
+func CoalesceDblPtr[T any](v1 **T, v2 *T) *T {
+	if v1 != nil {
+		return *v1
+	}
+
+	return v2
 }
 
 func CoalesceString(s *string, def string) string {

langext/json.go

@@ -63,3 +63,51 @@ func PatchRemJson[JV string | []byte](rawjson JV, key string) (JV, error) {
 
 	return JV(newjson), nil
 }
+
+func MarshalJsonOrPanic(v any) string {
+	bin, err := json.Marshal(v)
+	if err != nil {
+		panic(err)
+	}
+	return string(bin)
+}
+
+func MarshalJsonOrDefault(v any, def string) string {
+	bin, err := json.Marshal(v)
+	if err != nil {
+		return def
+	}
+	return string(bin)
+}
+
+func MarshalJsonOrNil(v any) *string {
+	bin, err := json.Marshal(v)
+	if err != nil {
+		return nil
+	}
+	return Ptr(string(bin))
+}
+
+func MarshalJsonIndentOrPanic(v any, prefix, indent string) string {
+	bin, err := json.MarshalIndent(v, prefix, indent)
+	if err != nil {
+		panic(err)
+	}
+	return string(bin)
+}
+
+func MarshalJsonIndentOrDefault(v any, prefix, indent string, def string) string {
+	bin, err := json.MarshalIndent(v, prefix, indent)
+	if err != nil {
+		return def
+	}
+	return string(bin)
+}
+
+func MarshalJsonIndentOrNil(v any, prefix, indent string) *string {
+	bin, err := json.MarshalIndent(v, prefix, indent)
+	if err != nil {
+		return nil
+	}
+	return Ptr(string(bin))
+}

langext/maps.go

@@ -29,6 +29,14 @@ func ArrToMap[T comparable, V any](a []V, keyfunc func(V) T) map[T]V {
 	return result
 }
 
+func ArrToKVMap[T any, K comparable, V any](a []T, keyfunc func(T) K, valfunc func(T) V) map[K]V {
+	result := make(map[K]V, len(a))
+	for _, v := range a {
+		result[keyfunc(v)] = valfunc(v)
+	}
+	return result
+}
+
 func ArrToSet[T comparable](a []T) map[T]bool {
 	result := make(map[T]bool, len(a))
 	for _, v := range a {
@@ -63,3 +71,19 @@ func ForceMap[K comparable, V any](v map[K]V) map[K]V {
 		return v
 	}
 }
+
+func MapMerge[K comparable, V any](base map[K]V, arr ...map[K]V) map[K]V {
+	res := make(map[K]V, len(base)*(1+len(arr)))
+
+	for k, v := range base {
+		res[k] = v
+	}
+
+	for _, m := range arr {
+		for k, v := range m {
+			res[k] = v
+		}
+	}
+
+	return res
+}

langext/must.go

@@ -0,0 +1,21 @@
+package langext
+
+// Must returns a value and panics on error
+//
+// Usage: Must(methodWithError(...))
+func Must[T any](v T, err error) T {
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// MustBool returns a value and panics on missing
+//
+// Usage: MustBool(methodWithOkayReturn(...))
+func MustBool[T any](v T, ok bool) T {
+	if !ok {
+		panic("not ok")
+	}
+	return v
+}

langext/object.go

@@ -0,0 +1,19 @@
+package langext
+
+import "encoding/json"
+
+func DeepCopyByJson[T any](v T) (T, error) {
+
+	bin, err := json.Marshal(v)
+	if err != nil {
+		return *new(T), err
+	}
+
+	var result T
+	err = json.Unmarshal(bin, &result)
+	if err != nil {
+		return *new(T), err
+	}
+
+	return result, nil
+}

langext/pointer.go

@@ -10,10 +10,34 @@ var PTrue = Ptr(true)
 // PFalse := &false
 var PFalse = Ptr(false)
 
+// PNil := &nil
+var PNil = Ptr[any](nil)
+
 func Ptr[T any](v T) *T {
 	return &v
 }
 
+func DblPtr[T any](v T) **T {
+	v_ := &v
+	return &v_
+}
+
+func DblPtrIfNotNil[T any](v *T) **T {
+	if v == nil {
+		return nil
+	}
+	return &v
+}
+
+func DblPtrNil[T any]() **T {
+	var v *T = nil
+	return &v
+}
+
+func ArrPtr[T any](v ...T) *[]T {
+	return &v
+}
+
 func PtrInt32(v int32) *int32 {
 	return &v
 }

langext/sort.go

@@ -8,12 +8,28 @@ func Sort[T OrderedConstraint](arr []T) {
 	})
 }
 
+func AsSorted[T OrderedConstraint](arr []T) []T {
+	arr = ArrCopy(arr)
+	sort.Slice(arr, func(i1, i2 int) bool {
+		return arr[i1] < arr[i2]
+	})
+	return arr
+}
+
 func SortStable[T OrderedConstraint](arr []T) {
 	sort.SliceStable(arr, func(i1, i2 int) bool {
 		return arr[i1] < arr[i2]
 	})
 }
 
+func AsSortedStable[T OrderedConstraint](arr []T) []T {
+	arr = ArrCopy(arr)
+	sort.SliceStable(arr, func(i1, i2 int) bool {
+		return arr[i1] < arr[i2]
+	})
+	return arr
+}
+
 func IsSorted[T OrderedConstraint](arr []T) bool {
 	return sort.SliceIsSorted(arr, func(i1, i2 int) bool {
 		return arr[i1] < arr[i2]
@@ -26,12 +42,28 @@ func SortSlice[T any](arr []T, less func(v1, v2 T) bool) {
 	})
 }
 
+func AsSortedSlice[T any](arr []T, less func(v1, v2 T) bool) []T {
+	arr = ArrCopy(arr)
+	sort.Slice(arr, func(i1, i2 int) bool {
+		return less(arr[i1], arr[i2])
+	})
+	return arr
+}
+
 func SortSliceStable[T any](arr []T, less func(v1, v2 T) bool) {
 	sort.SliceStable(arr, func(i1, i2 int) bool {
 		return less(arr[i1], arr[i2])
 	})
 }
 
+func AsSortedSliceStable[T any](arr []T, less func(v1, v2 T) bool) []T {
+	arr = ArrCopy(arr)
+	sort.SliceStable(arr, func(i1, i2 int) bool {
+		return less(arr[i1], arr[i2])
+	})
+	return arr
+}
+
 func IsSliceSorted[T any](arr []T, less func(v1, v2 T) bool) bool {
 	return sort.SliceIsSorted(arr, func(i1, i2 int) bool {
 		return less(arr[i1], arr[i2])
@@ -44,12 +76,28 @@ func SortBy[TElem any, TSel OrderedConstraint](arr []TElem, selector func(v TEle
 	})
 }
 
+func AsSortedBy[TElem any, TSel OrderedConstraint](arr []TElem, selector func(v TElem) TSel) []TElem {
+	arr = ArrCopy(arr)
+	sort.Slice(arr, func(i1, i2 int) bool {
+		return selector(arr[i1]) < selector(arr[i2])
+	})
+	return arr
+}
+
 func SortByStable[TElem any, TSel OrderedConstraint](arr []TElem, selector func(v TElem) TSel) {
 	sort.SliceStable(arr, func(i1, i2 int) bool {
 		return selector(arr[i1]) < selector(arr[i2])
 	})
 }
 
+func AsSortedByStable[TElem any, TSel OrderedConstraint](arr []TElem, selector func(v TElem) TSel) []TElem {
+	arr = ArrCopy(arr)
+	sort.SliceStable(arr, func(i1, i2 int) bool {
+		return selector(arr[i1]) < selector(arr[i2])
+	})
+	return arr
+}
+
 func IsSortedBy[TElem any, TSel OrderedConstraint](arr []TElem, selector func(v TElem) TSel) {
 	sort.SliceStable(arr, func(i1, i2 int) bool {
 		return selector(arr[i1]) < selector(arr[i2])

langext/string.go

@@ -88,12 +88,15 @@ func StrRunePadRight(str string, pad string, padlen int) string {
 
 func Indent(str string, pad string) string {
 	eonl := strings.HasSuffix(str, "\n")
+	if eonl {
+		str = str[0 : len(str)-1]
+	}
 	r := ""
 	for _, v := range strings.Split(str, "\n") {
 		r += pad + v + "\n"
 	}
 
-	if eonl {
+	if !eonl {
 		r = r[0 : len(r)-1]
 	}
 
@@ -115,3 +118,21 @@ func StrRepeat(val string, count int) string {
 	}
 	return r
 }
+
+func StrWrap(val string, linelen int, seperator string) string {
+	res := ""
+
+	for iPos := 0; ; {
+		next := min(iPos+linelen, len(val))
+		res += val[iPos:next]
+
+		iPos = next
+		if iPos >= len(val) {
+			break
+		}
+
+		res += seperator
+	}
+
+	return res
+}

langext/string_test.go

@@ -0,0 +1,152 @@
+package langext
+
+import "testing"
+
+func TestStrLimitBehaviour(t *testing.T) {
+	val := "Hello, World!"
+	maxlen := 5
+	suffix := "..."
+	expected := "He..."
+	result := StrLimit(val, maxlen, suffix)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrSplitBehaviour1(t *testing.T) {
+	val := "Hello,World,,"
+	sep := ","
+	expected := []string{"Hello", "World"}
+	result := StrSplit(val, sep, false)
+	if len(result) != len(expected) {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrSplitBehaviour2(t *testing.T) {
+	val := "Hello,World,,"
+	sep := ","
+	expected := []string{"Hello", "World", "", ""}
+	result := StrSplit(val, sep, true)
+	if len(result) != len(expected) {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrPadRightBehaviour(t *testing.T) {
+	str := "Hello"
+	pad := "*"
+	padlen := 10
+	expected := "Hello*****"
+	result := StrPadRight(str, pad, padlen)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrPadLeftBehaviour(t *testing.T) {
+	str := "Hello"
+	pad := "*"
+	padlen := 10
+	expected := "*****Hello"
+	result := StrPadLeft(str, pad, padlen)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrRunePadLeftBehaviour(t *testing.T) {
+	str := "Hello"
+	pad := "*"
+	padlen := 10
+	expected := "*****Hello"
+	result := StrRunePadLeft(str, pad, padlen)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrRunePadRightBehaviour(t *testing.T) {
+	str := "Hello"
+	pad := "*"
+	padlen := 10
+	expected := "Hello*****"
+	result := StrRunePadRight(str, pad, padlen)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestIndentBehaviour1(t *testing.T) {
+	str := "Hello\nWorld"
+	pad := ".."
+	expected := "..Hello\n..World"
+	result := Indent(str, pad)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestIndentBehaviour2(t *testing.T) {
+	str := "Hello\nWorld\n"
+	pad := ".."
+	expected := "..Hello\n..World\n"
+	result := Indent(str, pad)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrRepeatBehaviour(t *testing.T) {
+	val := "Hello"
+	count := 3
+	expected := "HelloHelloHello"
+	result := StrRepeat(val, count)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrWrapBehaviour1(t *testing.T) {
+	val := "123456789"
+	linelen := 5
+	seperator := "\n"
+	expected := "12345\n6789"
+	result := StrWrap(val, linelen, seperator)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrWrapBehaviour2(t *testing.T) {
+	val := "1234567890"
+	linelen := 5
+	seperator := "\n"
+	expected := "12345\n67890"
+	result := StrWrap(val, linelen, seperator)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrWrapBehaviour3(t *testing.T) {
+	val := "****************"
+	linelen := 4
+	seperator := "\n"
+	expected := "****\n****\n****\n****"
+	result := StrWrap(val, linelen, seperator)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}
+
+func TestStrWrapBehaviour4(t *testing.T) {
+	val := "*****************"
+	linelen := 4
+	seperator := "\n"
+	expected := "****\n****\n****\n****\n*"
+	result := StrWrap(val, linelen, seperator)
+	if result != expected {
+		t.Errorf("Expected %v but got %v", expected, result)
+	}
+}

langext/url.go

@@ -0,0 +1,29 @@
+package langext
+
+import (
+	"fmt"
+	"strings"
+)
+
+func BuildUrl(url, path string, params *map[string]string) string {
+	if path[:1] == "/" && url[len(url)-1:] == "/" {
+		url += path[1:]
+	} else if path[:1] != "/" && url[len(url)-1:] != "/" {
+		url += "/" + path
+	} else {
+		url += path
+	}
+
+	if params == nil {
+		return url
+	}
+
+	for key, value := range *params {
+		if strings.Contains(url, "?") {
+			url += fmt.Sprintf("&%s=%s", key, value)
+		} else {
+			url += fmt.Sprintf("?%s=%s", key, value)
+		}
+	}
+	return url
+}

langext/url_test.go

@@ -0,0 +1,45 @@
+package langext
+
+import (
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
+	"testing"
+)
+
+func TestBuildUrl(t *testing.T) {
+	tests := []struct {
+		Url    string
+		Path   string
+		Params *map[string]string
+		Want   string
+	}{
+		{
+			Url:    "https://test.heydyno.de/",
+			Path:   "/testing-01",
+			Params: &map[string]string{"param1": "value1"},
+			Want:   "https://test.heydyno.de/testing-01?param1=value1",
+		},
+		{
+			Url:    "https://test.heydyno.de",
+			Path:   "testing-01",
+			Params: &map[string]string{"param1": "value1"},
+			Want:   "https://test.heydyno.de/testing-01?param1=value1",
+		},
+		{
+			Url:    "https://test.heydyno.de",
+			Path:   "/testing-01",
+			Params: nil,
+			Want:   "https://test.heydyno.de/testing-01",
+		},
+		{
+			Url:    "https://test.heydyno.de/",
+			Path:   "testing-01",
+			Params: nil,
+			Want:   "https://test.heydyno.de/testing-01",
+		},
+	}
+
+	for _, test := range tests {
+		res := BuildUrl(test.Url, test.Path, test.Params)
+		tst.AssertEqual(t, res, test.Want)
+	}
+}

mongoext/registry.go

@@ -5,6 +5,7 @@ import (
 	"go.mongodb.org/mongo-driver/bson/bsoncodec"
 	"go.mongodb.org/mongo-driver/bson/bsontype"
 	"go.mongodb.org/mongo-driver/bson/primitive"
+	"gogs.mikescher.com/BlackForestBytes/goext/exerr"
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"gogs.mikescher.com/BlackForestBytes/goext/rfctime"
 	"reflect"
@@ -34,6 +35,15 @@ func CreateGoExtBsonRegistry() *bsoncodec.Registry {
 	rb.RegisterTypeDecoder(reflect.TypeOf(rfctime.SecondsF64(0)), rfctime.SecondsF64(0))
 	rb.RegisterTypeDecoder(reflect.TypeOf(langext.Ptr(rfctime.SecondsF64(0))), rfctime.SecondsF64(0))
 
+	rb.RegisterTypeDecoder(reflect.TypeOf(exerr.ErrorCategory{}), exerr.ErrorCategory{})
+	rb.RegisterTypeDecoder(reflect.TypeOf(langext.Ptr(exerr.ErrorCategory{})), exerr.ErrorCategory{})
+
+	rb.RegisterTypeDecoder(reflect.TypeOf(exerr.ErrorSeverity{}), exerr.ErrorSeverity{})
+	rb.RegisterTypeDecoder(reflect.TypeOf(langext.Ptr(exerr.ErrorSeverity{})), exerr.ErrorSeverity{})
+
+	rb.RegisterTypeDecoder(reflect.TypeOf(exerr.ErrorType{}), exerr.ErrorType{})
+	rb.RegisterTypeDecoder(reflect.TypeOf(langext.Ptr(exerr.ErrorType{})), exerr.ErrorType{})
+
 	bsoncodec.DefaultValueEncoders{}.RegisterDefaultEncoders(rb)
 	bsoncodec.DefaultValueDecoders{}.RegisterDefaultDecoders(rb)
 

pagination/filter.go

@@ -1,13 +1,14 @@
 package pagination
 
 import (
+	"context"
 	"go.mongodb.org/mongo-driver/bson"
 	"go.mongodb.org/mongo-driver/mongo"
 )
 
-type Filter interface {
+type MongoFilter interface {
-	FilterQuery() mongo.Pipeline
+	FilterQuery(ctx context.Context) mongo.Pipeline
-	Sort() bson.D
+	Sort(ctx context.Context) bson.D
 }
 
 type dynamicFilter struct {
@@ -15,14 +16,14 @@ type dynamicFilter struct {
 	sort     bson.D
 }
 
-func (d dynamicFilter) FilterQuery() mongo.Pipeline {
+func (d dynamicFilter) FilterQuery(ctx context.Context) mongo.Pipeline {
 	return d.pipeline
 }
 
-func (d dynamicFilter) Sort() bson.D {
+func (d dynamicFilter) Sort(ctx context.Context) bson.D {
 	return d.sort
 }
 
-func CreateFilter(pipeline mongo.Pipeline, sort bson.D) Filter {
+func CreateFilter(pipeline mongo.Pipeline, sort bson.D) MongoFilter {
 	return dynamicFilter{pipeline: pipeline, sort: sort}
 }

pagination/pagination.go

@@ -1,16 +1,19 @@
 package pagination
 
 type Pagination struct {
-	Page             int `json:"page"`            // page (first page == 1)
+	Page             int `json:"page"`             // page (first page == 1)
-	Limit            int `json:"limit"`           // max-page-size
+	Limit            int `json:"limit"`            // max-page-size
-	TotalPages       int `json:"totalPages"`      // total page-count
+	TotalPages       int `json:"totalPages"`       // total page-count
-	TotalItems       int `json:"totalItems"`      // total items-count
+	TotalItems       int `json:"totalItems"`       // total items-count
-	CurrentPageCount int `json:"currntPageCount"` // item-count in current page ( == len(data) )
+	CurrentPageCount int `json:"currentPageCount"` // item-count in current page ( == len(data) )
 }
 
 func CalcPaginationTotalPages(totalItems int, limit int) int {
 	if totalItems == 0 {
 		return 0
 	}
+	if limit == 0 {
+		return 0
+	}
 	return 1 + (totalItems-1)/limit
 }

reflectext/convertToMap.go

@@ -0,0 +1,102 @@
+package reflectext
+
+import (
+	"encoding/json"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"reflect"
+)
+
+type ConvertStructToMapOpt struct {
+	KeepJsonMarshalTypes bool
+	MaxDepth             *int
+}
+
+func ConvertStructToMap(v any, opts ...ConvertStructToMapOpt) map[string]any {
+	opt := ConvertStructToMapOpt{}
+	if len(opts) > 0 {
+		opt = opts[0]
+	}
+
+	res := reflectToMap(reflect.ValueOf(v), 1, opt)
+
+	if v, ok := res.(map[string]any); ok {
+		return v
+	} else if langext.IsNil(res) {
+		return nil
+	} else {
+		panic("not an object")
+	}
+}
+
+func reflectToMap(fv reflect.Value, depth int, opt ConvertStructToMapOpt) any {
+
+	if opt.MaxDepth != nil && depth > *opt.MaxDepth {
+		return fv.Interface()
+	}
+
+	if fv.Kind() == reflect.Ptr {
+
+		if fv.IsNil() {
+			return nil
+		} else {
+			return reflectToMap(fv.Elem(), depth, opt)
+		}
+
+	}
+
+	if fv.Kind() == reflect.Func {
+
+		// skip
+		return nil
+
+	}
+
+	if fv.Kind() == reflect.Array {
+
+		arrlen := fv.Len()
+		arr := make([]any, arrlen)
+		for i := 0; i < arrlen; i++ {
+			arr[i] = reflectToMap(fv.Index(i), depth+1, opt)
+		}
+		return arr
+
+	}
+
+	if fv.Kind() == reflect.Slice {
+
+		arrlen := fv.Len()
+		arr := make([]any, arrlen)
+		for i := 0; i < arrlen; i++ {
+			arr[i] = reflectToMap(fv.Index(i), depth+1, opt)
+		}
+		return arr
+
+	}
+
+	if fv.Kind() == reflect.Chan {
+
+		// skip
+		return nil
+
+	}
+
+	if fv.Kind() == reflect.Struct {
+
+		if opt.KeepJsonMarshalTypes && fv.Type().Implements(reflect.TypeFor[json.Marshaler]()) {
+			return fv.Interface()
+		}
+
+		res := make(map[string]any)
+
+		for i := 0; i < fv.NumField(); i++ {
+			if fv.Type().Field(i).IsExported() {
+				res[fv.Type().Field(i).Name] = reflectToMap(fv.Field(i), depth+1, opt)
+			}
+		}
+
+		return res
+
+	}
+
+	return fv.Interface()
+}

reflectext/convertToMap_test.go

@@ -0,0 +1,42 @@
+package reflectext
+
+import (
+	"fmt"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"testing"
+	"time"
+)
+
+func TestConvertStructToMap(t *testing.T) {
+
+	type tst struct {
+		FieldA  int
+		FieldB  string
+		FieldC  time.Time
+		FieldD  []float64
+		FieldE1 *int
+		FieldE2 **int
+		FieldE3 *int
+		FieldE4 **int
+		FieldE5 *int
+		FieldE6 **int
+	}
+
+	value := tst{
+		FieldA:  123,
+		FieldB:  "hello",
+		FieldC:  time.Date(2020, 05, 12, 8, 30, 0, 0, time.UTC),
+		FieldD:  []float64{1, 2, 3, 4, 5, 6, 7},
+		FieldE1: nil,
+		FieldE2: nil,
+		FieldE3: langext.Ptr(12),
+		FieldE4: langext.DblPtr(12),
+		FieldE5: nil,
+		FieldE6: langext.DblPtrNil[int](),
+	}
+
+	valueOut := ConvertStructToMap(value, ConvertStructToMapOpt{KeepJsonMarshalTypes: true})
+
+	fmt.Printf("%+v\n", valueOut)
+
+}

reflectext/mapAccess.go

@@ -0,0 +1,98 @@
+package reflectext
+
+import (
+	"reflect"
+	"strings"
+)
+
+// GetMapPath returns the value deep inside a hierahically nested map structure
+// eg:
+// x := langext.H{"K1": langext.H{"K2": 665}}
+// GetMapPath[int](x, "K1.K2") == 665
+func GetMapPath[TData any](mapval any, path string) (TData, bool) {
+	var ok bool
+
+	split := strings.Split(path, ".")
+
+	for i, key := range split {
+
+		if i < len(split)-1 {
+			mapval, ok = GetMapField[any](mapval, key)
+			if !ok {
+				return *new(TData), false
+			}
+		} else {
+			return GetMapField[TData](mapval, key)
+		}
+	}
+
+	return *new(TData), false
+}
+
+// GetMapField gets the value of a map, without knowing the actual types (mapval is any)
+// eg:
+// x := langext.H{"K1": 665}
+// GetMapPath[int](x, "K1") == 665
+//
+// works with aliased types and autom. dereferences pointes
+func GetMapField[TData any, TKey comparable](mapval any, key TKey) (TData, bool) {
+
+	rval := reflect.ValueOf(mapval)
+
+	for rval.Kind() == reflect.Ptr && !rval.IsNil() {
+		rval = rval.Elem()
+	}
+
+	if rval.Kind() != reflect.Map {
+		return *new(TData), false // mapval is not a map
+	}
+
+	kval := reflect.ValueOf(key)
+
+	if !kval.Type().AssignableTo(rval.Type().Key()) {
+		return *new(TData), false // key cannot index mapval
+	}
+
+	eval := rval.MapIndex(kval)
+	if !eval.IsValid() {
+		return *new(TData), false // key does not exist in mapval
+	}
+
+	destType := reflect.TypeOf(new(TData)).Elem()
+
+	if eval.Type() == destType {
+		return eval.Interface().(TData), true
+	}
+
+	if eval.CanConvert(destType) && !preventConvert(eval.Type(), destType) {
+		return eval.Convert(destType).Interface().(TData), true
+	}
+
+	if (eval.Kind() == reflect.Ptr || eval.Kind() == reflect.Interface) && eval.IsNil() && destType.Kind() == reflect.Ptr {
+		return *new(TData), false // special case: mapval[key] is nil
+	}
+
+	for (eval.Kind() == reflect.Ptr || eval.Kind() == reflect.Interface) && !eval.IsNil() {
+		eval = eval.Elem()
+
+		if eval.Type() == destType {
+			return eval.Interface().(TData), true
+		}
+
+		if eval.CanConvert(destType) && !preventConvert(eval.Type(), destType) {
+			return eval.Convert(destType).Interface().(TData), true
+		}
+	}
+
+	return *new(TData), false // mapval[key] is not of type TData
+}
+
+func preventConvert(t1 reflect.Type, t2 reflect.Type) bool {
+	if t1.Kind() == reflect.String && t1.Kind() != reflect.String {
+		return true
+	}
+	if t2.Kind() == reflect.String && t1.Kind() != reflect.String {
+		return true
+	}
+	return false
+}

reflectext/mapAccess_test.go

@@ -0,0 +1,49 @@
+package reflectext
+
+import (
+	"fmt"
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
+	"testing"
+)
+
+func TestGetMapPath(t *testing.T) {
+	type PseudoInt = int64
+
+	mymap2 := map[string]map[string]any{"Test": {"Second": 3}}
+
+	var maany2 any = mymap2
+
+	tst.AssertEqual(t, fmt.Sprint(GetMapPath[int](maany2, "Test.Second")), "3 true")
+	tst.AssertEqual(t, fmt.Sprint(GetMapPath[int](maany2, "Test2.Second")), "0 false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapPath[int](maany2, "Test.Second2")), "0 false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapPath[string](maany2, "Test.Second")), "false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapPath[string](maany2, "Test2.Second")), "false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapPath[string](maany2, "Test.Second2")), "false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapPath[PseudoInt](maany2, "Test.Second")), "3 true")
+	tst.AssertEqual(t, fmt.Sprint(GetMapPath[PseudoInt](maany2, "Test2.Second")), "0 false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapPath[PseudoInt](maany2, "Test.Second2")), "0 false")
+}
+
+func TestGetMapField(t *testing.T) {
+	type PseudoInt = int64
+
+	mymap1 := map[string]any{"Test": 12}
+	mymap2 := map[string]int{"Test": 12}
+
+	var maany1 any = mymap1
+	var maany2 any = mymap2
+
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[int](maany1, "Test")), "12 true")
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[int](maany1, "Test2")), "0 false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[string](maany1, "Test")), "false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[string](maany1, "Test2")), "false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[PseudoInt](maany1, "Test")), "12 true")
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[PseudoInt](maany1, "Test2")), "0 false")
+
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[int](maany2, "Test")), "12 true")
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[int](maany2, "Test2")), "0 false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[string](maany2, "Test")), "false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[string](maany2, "Test2")), "false")
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[PseudoInt](maany2, "Test")), "12 true")
+	tst.AssertEqual(t, fmt.Sprint(GetMapField[PseudoInt](maany2, "Test2")), "0 false")
+}

reflectext/structAccess.go

@@ -0,0 +1,185 @@
+package reflectext
+
+import (
+	"errors"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"reflect"
+	"strconv"
+	"strings"
+)
+
+var ErrAccessStructInvalidFieldType = errors.New("invalid field type")
+var ErrAccessStructFieldInPathWasNil = errors.New("a field in the path was nil")
+var ErrAccessStructInvalidArrayIndex = errors.New("invalid array index")
+var ErrAccessStructInvalidMapKey = errors.New("invalid map key")
+var ErrAccessStructArrayAccess = errors.New("trying to access array")
+var ErrAccessStructMapAccess = errors.New("trying to access map")
+var ErrAccessStructMissingField = errors.New("missing field")
+
+type AccessStructOpt struct {
+	ReturnNilOnMissingFields          bool    // return nil (instead of error) when a field in the path is missing (aka the supplied path is wrong)
+	ReturnNilOnNilPtrFields           bool    // return nil (instead of error) when a field in the path is nil
+	ReturnNilOnWrongFinalFieldType    bool    // return nil (instead of error) when the (final) field is not of the requested generic type
+	ReturnNilOnWrongIntermedFieldType bool    // return nil (instead of error) when the intermediate field has an invalid type
+	ReturnNilOnInvalidArrayIndizes    bool    // return nil (instead of error) when trying to acces an array with an invalid index (not a number or out of range)
+	ReturnNilOnMissingMapKeys         bool    // return nil (instead of error) when trying to access a map with a missing key
+	UsedTagForKeys                    *string // Use this tag for key names in the struct (instead of the StructField.Name)
+	PreventArrayAccess                bool    // do not access array indizes - throw an error instead
+	PreventMapAccess                  bool    // do not access maps - throw an error instead
+}
+
+func AccessJSONStruct[TResult any](v any, path string) (TResult, error) {
+	return AccessStructByStringPath[TResult](v, path, AccessStructOpt{UsedTagForKeys: langext.Ptr("json")})
+}
+
+func AccessStruct[TResult any](v any, path string) (TResult, error) {
+	return AccessStructByStringPath[TResult](v, path, AccessStructOpt{})
+}
+
+func AccessStructByArrayPath[TResult any](v any, path []string, opts ...AccessStructOpt) (TResult, error) {
+	opt := AccessStructOpt{}
+	if len(opts) > 0 {
+		opt = opts[0]
+	}
+
+	resultVal, err := accessStructByPath(reflect.ValueOf(v), path, opt)
+	if err != nil {
+		return *new(TResult), err
+	}
+
+	if resultValCast, ok := resultVal.(TResult); ok {
+		return resultValCast, nil
+	} else if opt.ReturnNilOnWrongFinalFieldType {
+		return *new(TResult), nil
+	} else {
+		return *new(TResult), ErrAccessStructInvalidFieldType
+	}
+}
+
+func AccessStructByStringPath[TResult any](v any, path string, opts ...AccessStructOpt) (TResult, error) {
+	opt := AccessStructOpt{}
+	if len(opts) > 0 {
+		opt = opts[0]
+	}
+	arrpath := strings.Split(path, ".")
+
+	resultVal, err := accessStructByPath(reflect.ValueOf(v), arrpath, opt)
+	if err != nil {
+		return *new(TResult), err
+	}
+
+	if resultValCast, ok := resultVal.(TResult); ok {
+		return resultValCast, nil
+	} else if opt.ReturnNilOnWrongFinalFieldType {
+		return *new(TResult), nil
+	} else {
+		return *new(TResult), ErrAccessStructInvalidFieldType
+	}
+}
+
+func accessStructByPath(val reflect.Value, path []string, opt AccessStructOpt) (any, error) {
+	if len(path) == 0 {
+		return val.Interface(), nil
+	}
+
+	currPath := path[0]
+
+	if val.Kind() == reflect.Ptr {
+		if val.IsNil() {
+			if opt.ReturnNilOnNilPtrFields {
+				return nil, nil
+			} else {
+				return nil, ErrAccessStructFieldInPathWasNil
+			}
+		}
+		return accessStructByPath(val.Elem(), path, opt)
+	}
+
+	if val.Kind() == reflect.Array || val.Kind() == reflect.Slice {
+		if opt.PreventArrayAccess {
+			return nil, ErrAccessStructArrayAccess
+		}
+
+		if val.IsNil() {
+			if opt.ReturnNilOnNilPtrFields {
+				return nil, nil
+			} else {
+				return nil, ErrAccessStructFieldInPathWasNil
+			}
+		}
+
+		arrIdx, err := strconv.ParseInt(currPath, 10, 64)
+		if err != nil {
+			if opt.ReturnNilOnInvalidArrayIndizes {
+				return nil, nil
+			} else {
+				return nil, ErrAccessStructInvalidArrayIndex
+			}
+		}
+		if arrIdx < 0 || int(arrIdx) >= val.Len() {
+			if opt.ReturnNilOnInvalidArrayIndizes {
+				return nil, nil
+			} else {
+				return nil, ErrAccessStructInvalidArrayIndex
+			}
+		}
+		return accessStructByPath(val.Index(int(arrIdx)), path[1:], opt)
+	}
+
+	if val.Kind() == reflect.Map {
+		if opt.PreventMapAccess {
+			return nil, ErrAccessStructMapAccess
+		}
+
+		if val.IsNil() {
+			if opt.ReturnNilOnNilPtrFields {
+				return nil, nil
+			} else {
+				return nil, ErrAccessStructFieldInPathWasNil
+			}
+		}
+
+		mapval := val.MapIndex(reflect.ValueOf(currPath))
+		if !mapval.IsValid() || mapval.IsZero() {
+			if opt.ReturnNilOnMissingMapKeys {
+				return nil, nil
+			} else {
+				return nil, ErrAccessStructInvalidMapKey
+			}
+		}
+
+		return accessStructByPath(mapval, path[1:], opt)
+	}
+
+	if val.Kind() == reflect.Struct {
+		if opt.UsedTagForKeys != nil {
+			for i := 0; i < val.NumField(); i++ {
+				if val.Type().Field(i).Tag.Get(*opt.UsedTagForKeys) == currPath {
+					return accessStructByPath(val.Field(i), path[1:], opt)
+				}
+			}
+			if opt.ReturnNilOnMissingFields {
+				return nil, nil
+			} else {
+				return nil, ErrAccessStructMissingField
+			}
+		} else {
+			for i := 0; i < val.NumField(); i++ {
+				if val.Type().Field(i).Name == currPath {
+					return accessStructByPath(val.Field(i), path[1:], opt)
+				}
+			}
+			if opt.ReturnNilOnMissingFields {
+				return nil, nil
+			} else {
+				return nil, ErrAccessStructMissingField
+			}
+		}
+	}
+
+	if opt.ReturnNilOnWrongIntermedFieldType {
+		return nil, nil
+	} else {
+		return nil, ErrAccessStructMissingField
+	}
+}

reflectext/structAccess_test.go

@@ -0,0 +1,259 @@
+package reflectext
+
+import "testing"
+
+type TestStruct struct {
+	Name string `json:"name"`
+	Age  int    `json:"age"`
+}
+
+func TestAccessStructByArrayPath_HappyPath(t *testing.T) {
+	testStruct := TestStruct{Name: "John", Age: 30}
+	result, err := AccessStructByArrayPath[string](testStruct, []string{"Name"})
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if result != "John" {
+		t.Errorf("Expected 'John', got '%s'", result)
+	}
+}
+
+func TestAccessStructByArrayPath_InvalidField(t *testing.T) {
+	testStruct := TestStruct{Name: "John", Age: 30}
+	_, err := AccessStructByArrayPath[string](testStruct, []string{"Invalid"})
+	if err == nil {
+		t.Errorf("Expected error, got nil")
+	}
+}
+
+func TestAccessStructByStringPath_HappyPath(t *testing.T) {
+	testStruct := TestStruct{Name: "John", Age: 30}
+	result, err := AccessStructByStringPath[string](testStruct, "Name")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if result != "John" {
+		t.Errorf("Expected 'John', got '%s'", result)
+	}
+}
+
+func TestAccessStructByStringPath_InvalidField(t *testing.T) {
+	testStruct := TestStruct{Name: "John", Age: 30}
+	_, err := AccessStructByStringPath[string](testStruct, "Invalid")
+	if err == nil {
+		t.Errorf("Expected error, got nil")
+	}
+}
+
+type RecursiveStruct struct {
+	Name     string
+	Sub      *RecursiveStruct
+	SubSlice []RecursiveStruct
+}
+
+func TestAccessStructByArrayPath_RecursiveStruct(t *testing.T) {
+	testStruct := RecursiveStruct{Name: "John", Sub: &RecursiveStruct{Name: "Jane"}}
+	result, err := AccessStructByArrayPath[string](*testStruct.Sub, []string{"Name"})
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if result != "Jane" {
+		t.Errorf("Expected 'Jane', got '%s'", result)
+	}
+}
+
+func TestAccessStructByArrayPath_RecursiveStructSlice(t *testing.T) {
+	testStruct := RecursiveStruct{Name: "John", SubSlice: []RecursiveStruct{{Name: "Jane"}}}
+	result, err := AccessStructByArrayPath[string](testStruct.SubSlice[0], []string{"Name"})
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if result != "Jane" {
+		t.Errorf("Expected 'Jane', got '%s'", result)
+	}
+}
+
+func TestAccessStructByArrayPath_WrongType(t *testing.T) {
+	testStruct := TestStruct{Name: "John", Age: 30}
+	_, err := AccessStructByArrayPath[int](testStruct, []string{"Name"})
+	if err == nil {
+		t.Errorf("Expected error, got nil")
+	}
+}
+
+func TestAccessStructByArrayPath_InvalidPath(t *testing.T) {
+	testStruct := TestStruct{Name: "John", Age: 30}
+	_, err := AccessStructByArrayPath[string](testStruct, []string{"Name", "Invalid"})
+	if err == nil {
+		t.Errorf("Expected error, got nil")
+	}
+}
+
+type NestedStruct struct {
+	Name string
+	Sub  *TestStruct
+}
+
+func TestAccessStructByStringPath_NestedStruct(t *testing.T) {
+	testStruct := NestedStruct{Name: "John", Sub: &TestStruct{Name: "Jane", Age: 30}}
+	result, err := AccessStructByStringPath[string](testStruct, "Sub.Name")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if result != "Jane" {
+		t.Errorf("Expected 'Jane', got '%s'", result)
+	}
+}
+
+type DeepNestedStruct struct {
+	Name string
+	Sub  *NestedStruct
+}
+
+func TestAccessStructByStringPath_DeepNestedStruct(t *testing.T) {
+	testStruct := DeepNestedStruct{Name: "John", Sub: &NestedStruct{Name: "Jane", Sub: &TestStruct{Name: "Doe", Age: 30}}}
+	result, err := AccessStructByStringPath[string](testStruct, "Sub.Sub.Name")
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if result != "Doe" {
+		t.Errorf("Expected 'Doe', got '%s'", result)
+	}
+}
+
+type MapStruct struct {
+	Name string
+	Age  int
+}
+
+type TestStructWithMap struct {
+	MapField map[string]MapStruct
+}
+
+func TestAccessStructByArrayPath_MapField(t *testing.T) {
+	testStruct := TestStructWithMap{
+		MapField: map[string]MapStruct{
+			"key": {Name: "John", Age: 30},
+		},
+	}
+	result, err := AccessStructByArrayPath[string](testStruct, []string{"MapField", "key", "Name"})
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if result != "John" {
+		t.Errorf("Expected 'John', got '%s'", result)
+	}
+}
+
+func TestAccessStructByArrayPath_InvalidMapKey(t *testing.T) {
+	testStruct := TestStructWithMap{
+		MapField: map[string]MapStruct{
+			"key": {Name: "John", Age: 30},
+		},
+	}
+	_, err := AccessStructByArrayPath[string](testStruct, []string{"MapField", "invalid", "Name"})
+	if err == nil {
+		t.Errorf("Expected error, got nil")
+	}
+}
+
+type ArrayStruct struct {
+	Name string
+	Arr  []TestStruct
+}
+
+func TestAccessStructByArrayPath_ArrayField(t *testing.T) {
+	testStruct := ArrayStruct{
+		Name: "John",
+		Arr:  []TestStruct{{Name: "Jane", Age: 30}},
+	}
+	result, err := AccessStructByArrayPath[string](testStruct, []string{"Arr", "0", "Name"})
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if result != "Jane" {
+		t.Errorf("Expected 'Jane', got '%s'", result)
+	}
+}
+
+func TestAccessStructByArrayPath_InvalidArrayIndex(t *testing.T) {
+	testStruct := ArrayStruct{
+		Name: "John",
+		Arr:  []TestStruct{{Name: "Jane", Age: 30}},
+	}
+	_, err := AccessStructByArrayPath[string](testStruct, []string{"Arr", "1", "Name"})
+	if err == nil {
+		t.Errorf("Expected error, got nil")
+	}
+}
+
+type FunctionStruct struct {
+	Name string
+	Func func() string
+}
+
+func TestAccessStructByArrayPath_FunctionField(t *testing.T) {
+	testStruct := FunctionStruct{Name: "John", Func: func() string { return "Hello" }}
+	_, err := AccessStructByArrayPath[string](testStruct, []string{"Func"})
+	if err == nil {
+		t.Errorf("Expected error, got nil")
+	}
+}
+
+func TestAccessStructByArrayPath_NonExistentPath(t *testing.T) {
+	testStruct := TestStruct{Name: "John", Age: 30}
+	_, err := AccessStructByArrayPath[string](testStruct, []string{"NonExistent"})
+	if err == nil {
+		t.Errorf("Expected error, got nil")
+	}
+}
+
+type NestedStructWithTag struct {
+	Name string      `json:"name"`
+	Sub  *TestStruct `json:"sub"`
+}
+
+func TestAccessStructByArrayPath_UsedTagForKeys(t *testing.T) {
+	testStruct := NestedStructWithTag{Name: "John", Sub: &TestStruct{Name: "Jane", Age: 30}}
+	tag := "json"
+	result, err := AccessStructByArrayPath[string](testStruct, []string{"sub", "name"}, AccessStructOpt{UsedTagForKeys: &tag})
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if result != "Jane" {
+		t.Errorf("Expected 'Jane', got '%s'", result)
+	}
+}
+
+func TestAccessStructByArrayPath_UsedTagForKeysInvalid(t *testing.T) {
+	testStruct := NestedStructWithTag{Name: "John", Sub: &TestStruct{Name: "Jane", Age: 30}}
+	tag := "json"
+	_, err := AccessStructByArrayPath[string](testStruct, []string{"sub", "invalid"}, AccessStructOpt{UsedTagForKeys: &tag})
+	if err == nil {
+		t.Errorf("Expected error, got nil")
+	}
+}
+
+type DifferentTypeStruct struct {
+	Name string
+	Age  int
+}
+
+func TestAccessStructByArrayPath_DifferentType(t *testing.T) {
+	testStruct := DifferentTypeStruct{Name: "John", Age: 30}
+	result, err := AccessStructByArrayPath[any](testStruct, []string{"Age"})
+	if err != nil {
+		t.Errorf("Unexpected error: %v", err)
+	}
+	if result != 30 {
+		t.Errorf("Expected '30', got '%v'", result)
+	}
+}
+
+func TestAccessStructByArrayPath_DifferentTypeInvalid(t *testing.T) {
+	testStruct := DifferentTypeStruct{Name: "John", Age: 30}
+	_, err := AccessStructByArrayPath[any](testStruct, []string{"Invalid"})
+	if err == nil {
+		t.Errorf("Expected error, got nil")
+	}
+}

rfctime/date.go

@@ -9,6 +9,8 @@ import (
 	"go.mongodb.org/mongo-driver/bson/bsonrw"
 	"go.mongodb.org/mongo-driver/bson/bsontype"
 	"reflect"
+	"strconv"
+	"strings"
 	"time"
 )
 
@@ -65,36 +67,20 @@ func (t *Date) UnmarshalJSON(data []byte) error {
 	if err := json.Unmarshal(data, &str); err != nil {
 		return err
 	}
-	t0, err := time.Parse(t.FormatStr(), str)
+	return t.ParseString(str)
-	if err != nil {
-		return err
-	}
-	t.Year = t0.Year()
-	t.Month = int(t0.Month())
-	t.Day = t0.Day()
-	return nil
 }
 
 func (t Date) MarshalJSON() ([]byte, error) {
-	str := t.TimeUTC().Format(t.FormatStr())
+	str := t.String()
 	return json.Marshal(str)
 }
 
 func (t Date) MarshalText() ([]byte, error) {
-	b := make([]byte, 0, len(t.FormatStr()))
+	return []byte(t.String()), nil
-	return t.TimeUTC().AppendFormat(b, t.FormatStr()), nil
 }
 
 func (t *Date) UnmarshalText(data []byte) error {
-	var err error
+	return t.ParseString(string(data))
-	v, err := time.Parse(t.FormatStr(), string(data))
-	if err != nil {
-		return err
-	}
-	t.Year = v.Year()
-	t.Month = int(v.Month())
-	t.Day = v.Day()
-	return nil
 }
 
 func (t *Date) UnmarshalBSONValue(bt bsontype.Type, data []byte) error {
@@ -116,6 +102,13 @@ func (t *Date) UnmarshalBSONValue(bt bsontype.Type, data []byte) error {
 		return err
 	}
 
+	if tt == "" {
+		t.Year = 0
+		t.Month = 0
+		t.Day = 0
+		return nil
+	}
+
 	v, err := time.Parse(t.FormatStr(), tt)
 	if err != nil {
 		return err
@@ -128,7 +121,10 @@ func (t *Date) UnmarshalBSONValue(bt bsontype.Type, data []byte) error {
 }
 
 func (t Date) MarshalBSONValue() (bsontype.Type, []byte, error) {
-	return bson.MarshalValue(t.TimeUTC().Format(t.FormatStr()))
+	if t.IsZero() {
+		return bson.MarshalValue("")
+	}
+	return bson.MarshalValue(t.String())
 }
 
 func (t Date) DecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
@@ -164,7 +160,7 @@ func (t Date) DecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val
 }
 
 func (t Date) Serialize() string {
-	return t.TimeUTC().Format(t.FormatStr())
+	return t.String()
 }
 
 func (t Date) FormatStr() string {
@@ -212,11 +208,52 @@ func (t Date) Format(layout string) string {
 }
 
 func (t Date) GoString() string {
-	return t.TimeUTC().GoString()
+	return fmt.Sprintf("rfctime.Date{Year: %d, Month: %d, Day: %d}", t.Year, t.Month, t.Day)
 }
 
 func (t Date) String() string {
-	return t.TimeUTC().String()
+	return fmt.Sprintf("%04d-%02d-%02d", t.Year, t.Month, t.Day)
+}
+
+func (t *Date) ParseString(v string) error {
+	split := strings.Split(v, "-")
+	if len(split) != 3 {
+		return errors.New("invalid date format: " + v)
+	}
+	year, err := strconv.ParseInt(split[0], 10, 32)
+	if err != nil {
+		return errors.New("invalid date format: " + v + ": " + err.Error())
+	}
+	month, err := strconv.ParseInt(split[1], 10, 32)
+	if err != nil {
+		return errors.New("invalid date format: " + v + ": " + err.Error())
+	}
+	day, err := strconv.ParseInt(split[2], 10, 32)
+	if err != nil {
+		return errors.New("invalid date format: " + v + ": " + err.Error())
+	}
+
+	if year < 0 {
+		return errors.New("invalid date format: " + v + ": year is negative")
+	}
+
+	if month < 1 || month > 12 {
+		return errors.New("invalid date format: " + v + ": month is out of range")
+	}
+
+	if day < 1 || day > 31 {
+		return errors.New("invalid date format: " + v + ": day is out of range")
+	}
+
+	t.Year = int(year)
+	t.Month = int(month)
+	t.Day = int(day)
+
+	return nil
+}
+
+func (t Date) IsZero() bool {
+	return t.Year == 0 && t.Month == 0 && t.Day == 0
 }
 
 func NewDate(t time.Time) Date {

rfctime/rfc3339.go

@@ -8,6 +8,7 @@ import (
 	"go.mongodb.org/mongo-driver/bson/bsoncodec"
 	"go.mongodb.org/mongo-driver/bson/bsonrw"
 	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"reflect"
 	"time"
 )
@@ -245,6 +246,13 @@ func NewRFC3339(t time.Time) RFC3339Time {
 	return RFC3339Time(t)
 }
 
+func NewRFC3339Ptr(t *time.Time) *RFC3339Time {
+	if t == nil {
+		return nil
+	}
+	return langext.Ptr(RFC3339Time(*t))
+}
+
 func NowRFC3339() RFC3339Time {
 	return RFC3339Time(time.Now())
 }

rfctime/rfc3339Nano.go

@@ -8,6 +8,7 @@ import (
 	"go.mongodb.org/mongo-driver/bson/bsoncodec"
 	"go.mongodb.org/mongo-driver/bson/bsonrw"
 	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"reflect"
 	"time"
 )
@@ -245,6 +246,13 @@ func NewRFC3339Nano(t time.Time) RFC3339NanoTime {
 	return RFC3339NanoTime(t)
 }
 
+func NewRFC3339NanoPtr(t *time.Time) *RFC3339NanoTime {
+	if t == nil {
+		return nil
+	}
+	return langext.Ptr(RFC3339NanoTime(*t))
+}
+
 func NowRFC3339Nano() RFC3339NanoTime {
 	return RFC3339NanoTime(time.Now())
 }

rfctime/time.go

@@ -0,0 +1,148 @@
+package rfctime
+
+import (
+	"fmt"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type Time struct {
+	Hour       int
+	Minute     int
+	Second     int
+	NanoSecond int
+}
+
+func (t Time) Serialize() string {
+	return fmt.Sprintf("%04d:%02d:%02d.%09d", t.Hour, t.Minute, t.Second, t.NanoSecond)
+}
+
+func (t Time) SerializeShort() string {
+	if t.NanoSecond == 0 && t.Second == 0 {
+		return fmt.Sprintf("%02d:%02d", t.Hour, t.Minute)
+	} else if t.NanoSecond == 0 {
+		return fmt.Sprintf("%02d:%02d:%02d", t.Hour, t.Minute, t.Second)
+	} else {
+		return fmt.Sprintf("%02d:%02d:%02d.%09d", t.Hour, t.Minute, t.Second, t.NanoSecond)
+	}
+}
+
+func (t *Time) Deserialize(v string) error {
+
+	var h, m, s, ns string
+
+	split1 := strings.Split(v, ".")
+
+	if len(split1) == 2 {
+
+		split2 := strings.Split(split1[0], ":")
+		if len(split2) == 3 {
+
+			h = split2[0]
+			m = split2[1]
+			s = split2[2]
+			ns = split1[1]
+
+		} else {
+			return fmt.Errorf("invalid time format: %s", v)
+		}
+
+	} else if len(split1) == 1 {
+
+		split2 := strings.Split(split1[0], ":")
+		if len(split2) == 2 {
+
+			h = split2[0]
+			m = split2[1]
+			s = "0"
+			ns = "0"
+
+		} else if len(split2) == 3 {
+
+			h = split2[0]
+			m = split2[1]
+			s = split2[2]
+			ns = "0"
+
+		} else {
+			return fmt.Errorf("invalid time format: %s", v)
+		}
+
+	} else {
+		return fmt.Errorf("invalid time format: %s", v)
+	}
+
+	ns = langext.StrPadRight(ns, "0", 9)
+
+	hh, err := strconv.ParseInt(h, 10, 32)
+	if err != nil {
+		return fmt.Errorf("invalid time format: %s", v)
+	}
+
+	mm, err := strconv.ParseInt(m, 10, 32)
+	if err != nil {
+		return fmt.Errorf("invalid time format: %s", v)
+	}
+
+	ss, err := strconv.ParseInt(s, 10, 32)
+	if err != nil {
+		return fmt.Errorf("invalid time format: %s", v)
+	}
+
+	nss, err := strconv.ParseInt(ns, 10, 32)
+	if err != nil {
+		return fmt.Errorf("invalid time format: %s", v)
+	}
+
+	t.Hour = int(hh)
+	t.Minute = int(mm)
+	t.Second = int(ss)
+	t.NanoSecond = int(nss)
+
+	return nil
+}
+
+func (t Time) FormatStr() string {
+	return "15:04:05.999999999"
+}
+
+func (t Time) GoString() string {
+	return fmt.Sprintf("rfctime.NewTime(%d, %d, %d, %d)", t.Hour, t.Minute, t.Second, t.NanoSecond)
+}
+
+func (t Time) String() string {
+	return fmt.Sprintf("%04d:%02d:%02d.%09d", t.Hour, t.Minute, t.Second, t.NanoSecond)
+}
+
+func NewTime(h int, m int, s int, ns int) Time {
+	return Time{
+		Hour:       h,
+		Minute:     m,
+		Second:     s,
+		NanoSecond: ns,
+	}
+}
+
+func NewTimeFromTS(t time.Time) Time {
+	return Time{
+		Hour:       t.Hour(),
+		Minute:     t.Minute(),
+		Second:     t.Second(),
+		NanoSecond: t.Nanosecond(),
+	}
+}
+
+func NowTime(loc *time.Location) Time {
+	now := time.Now().In(loc)
+	return NewTime(now.Hour(), now.Minute(), now.Second(), now.Nanosecond())
+}
+
+func NowTimeLoc() Time {
+	return NowTime(time.UTC)
+}
+
+func NowTimeUTC() Time {
+	return NowTime(time.Local)
+}

rfctime/unix.go

@@ -8,6 +8,7 @@ import (
 	"go.mongodb.org/mongo-driver/bson/bsoncodec"
 	"go.mongodb.org/mongo-driver/bson/bsonrw"
 	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"reflect"
 	"strconv"
 	"time"
@@ -239,6 +240,13 @@ func NewUnix(t time.Time) UnixTime {
 	return UnixTime(t)
 }
 
+func NewUnixPtr(t *time.Time) *UnixTime {
+	if t == nil {
+		return nil
+	}
+	return langext.Ptr(UnixTime(*t))
+}
+
 func NowUnix() UnixTime {
 	return UnixTime(time.Now())
 }

rfctime/unixMilli.go

@@ -8,6 +8,7 @@ import (
 	"go.mongodb.org/mongo-driver/bson/bsoncodec"
 	"go.mongodb.org/mongo-driver/bson/bsonrw"
 	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"reflect"
 	"strconv"
 	"time"
@@ -239,6 +240,13 @@ func NewUnixMilli(t time.Time) UnixMilliTime {
 	return UnixMilliTime(t)
 }
 
+func NewUnixMilliPtr(t *time.Time) *UnixMilliTime {
+	if t == nil {
+		return nil
+	}
+	return langext.Ptr(UnixMilliTime(*t))
+}
+
 func NowUnixMilli() UnixMilliTime {
 	return UnixMilliTime(time.Now())
 }

rfctime/unixNano.go

@@ -8,6 +8,7 @@ import (
 	"go.mongodb.org/mongo-driver/bson/bsoncodec"
 	"go.mongodb.org/mongo-driver/bson/bsonrw"
 	"go.mongodb.org/mongo-driver/bson/bsontype"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"reflect"
 	"strconv"
 	"time"
@@ -239,6 +240,13 @@ func NewUnixNano(t time.Time) UnixNanoTime {
 	return UnixNanoTime(t)
 }
 
+func NewUnixNanoPtr(t *time.Time) *UnixNanoTime {
+	if t == nil {
+		return nil
+	}
+	return langext.Ptr(UnixNanoTime(*t))
+}
+
 func NowUnixNano() UnixNanoTime {
 	return UnixNanoTime(time.Now())
 }

scn/scn.go

@@ -0,0 +1,13 @@
+package scn
+
+type Connection struct {
+	uid   string
+	token string
+}
+
+func New(userid string, token string) *Connection {
+	return &Connection{
+		uid:   userid,
+		token: token,
+	}
+}

scn/send.go

@@ -0,0 +1,171 @@
+package scn
+
+import (
+	"bytes"
+	"context"
+	"gogs.mikescher.com/BlackForestBytes/goext/exerr"
+	json "gogs.mikescher.com/BlackForestBytes/goext/gojson"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"io"
+	"net/http"
+	"time"
+)
+
+var (
+	ErrAuthFailed        = exerr.NewType("GOEXT_SCN_AUTHFAILED", nil)
+	ErrQuota             = exerr.NewType("GOEXT_SCN_QUOTAEXCEEDED", nil)
+	ErrBadRequest        = exerr.NewType("GOEXT_SCN_BADREQUEST", nil)
+	ErrInternalServerErr = exerr.NewType("GOEXT_SCN_INTERNALSERVER", nil)
+	ErrOther             = exerr.NewType("GOEXT_SCN_OTHER", nil)
+)
+
+type MessageResponse struct {
+	ErrHighlight int    `json:"errhighlight"`
+	Error        int    `json:"error"`
+	IsPro        bool   `json:"is_pro"`
+	Message      string `json:"message"`
+	Messagecount int    `json:"messagecount"`
+	Quota        int    `json:"quota"`
+	QuotaMax     int    `json:"quota_max"`
+	SCNMessageID string `json:"scn_msg_id"`
+	Success      bool   `json:"success"`
+	SuppressSend bool   `json:"suppress_send"`
+}
+
+type MessageErrResponse struct {
+	Errhighlight int    `json:"errhighlight"`
+	Error        int    `json:"error"`
+	Message      string `json:"message"`
+	Success      bool   `json:"success"`
+}
+
+type MessageBuilder struct {
+	conn       *Connection
+	title      string
+	content    *string
+	channel    *string
+	time       *time.Time
+	sendername *string
+	priority   *int
+}
+
+func (c *Connection) Message(title string) *MessageBuilder {
+	return &MessageBuilder{conn: c, title: title}
+}
+
+func (c *MessageBuilder) Channel(channel string) *MessageBuilder {
+	c.channel = &channel
+	return c
+}
+
+func (c *MessageBuilder) Content(content string) *MessageBuilder {
+	c.content = &content
+	return c
+}
+
+func (c *MessageBuilder) Time(t time.Time) *MessageBuilder {
+	c.time = &t
+	return c
+}
+
+func (c *MessageBuilder) SenderName(sn string) *MessageBuilder {
+	c.sendername = &sn
+	return c
+}
+
+func (c *MessageBuilder) Priority(p int) *MessageBuilder {
+	c.priority = &p
+	return c
+}
+
+func (c *MessageBuilder) Send(ctx context.Context) (MessageResponse, error) {
+	client := http.Client{Timeout: 5 * time.Second}
+
+	body := langext.H{}
+
+	body["user_id"] = c.conn.uid
+	body["key"] = c.conn.token
+
+	if c.channel != nil {
+		body["channel"] = *c.channel
+	}
+
+	body["title"] = c.title
+
+	if c.content != nil {
+		body["content"] = *c.content
+	}
+
+	if c.sendername != nil {
+		body["content"] = *c.sendername
+	}
+
+	if c.time != nil {
+		body["timestamp"] = c.time.Unix()
+	}
+
+	if c.priority != nil {
+		body["priority"] = *c.priority
+	}
+
+	body["msg_id"] = langext.MustHexUUID()
+
+	rawbody, err := json.Marshal(body)
+	if err != nil {
+		return MessageResponse{}, err
+	}
+
+	req, err := http.NewRequestWithContext(ctx, "POST", "https://simplecloudnotifier.de/", bytes.NewBuffer(rawbody))
+	if err != nil {
+		return MessageResponse{}, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := client.Do(req)
+	if err != nil {
+		return MessageResponse{}, err
+	}
+
+	defer func() { _ = resp.Body.Close() }()
+
+	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
+
+		raw, err := io.ReadAll(resp.Body)
+		if err != nil {
+			return MessageResponse{}, err
+		}
+
+		var mr MessageResponse
+		err = json.Unmarshal(raw, &mr)
+		if err != nil {
+			return MessageResponse{}, err
+		}
+
+		return mr, nil
+	} else {
+		errMessage := resp.Status
+
+		if raw, err := io.ReadAll(resp.Body); err == nil {
+			var mr MessageErrResponse
+			if err = json.Unmarshal(raw, &mr); err == nil {
+				errMessage = mr.Message
+			}
+		}
+
+		if resp.StatusCode == 400 {
+			return MessageResponse{}, exerr.New(ErrBadRequest, errMessage).Build()
+		}
+		if resp.StatusCode == 401 {
+			return MessageResponse{}, exerr.New(ErrAuthFailed, errMessage).Build()
+		}
+		if resp.StatusCode == 403 {
+			return MessageResponse{}, exerr.New(ErrQuota, errMessage).Build()
+		}
+		if resp.StatusCode == 500 {
+			return MessageResponse{}, exerr.New(ErrInternalServerErr, errMessage).Build()
+		}
+
+		return MessageResponse{}, exerr.New(ErrOther, errMessage).Build()
+	}
+
+}

scn/send_test.go

@@ -0,0 +1,24 @@
+package scn
+
+import (
+	"context"
+	"fmt"
+	"testing"
+)
+
+func TestSendSCN(t *testing.T) {
+	t.Skip()
+	return
+
+	mr, err := New("TODO", "TODO").
+		Message("Hello Test").
+		Content("This is a test / goext").
+		Send(context.Background())
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Printf("%+v\n", mr)
+
+}

sq/builder.go

@@ -0,0 +1,199 @@
+package sq
+
+import (
+	"errors"
+	"fmt"
+	"gogs.mikescher.com/BlackForestBytes/goext/exerr"
+	"reflect"
+	"strings"
+)
+
+func BuildUpdateStatement[TData any](q Queryable, tableName string, obj TData, idColumn string) (string, PP, error) {
+	rval := reflect.ValueOf(obj)
+	rtyp := rval.Type()
+
+	params := PP{}
+
+	setClauses := make([]string, 0)
+
+	matchClause := ""
+
+	for i := 0; i < rtyp.NumField(); i++ {
+
+		rsfield := rtyp.Field(i)
+		rvfield := rval.Field(i)
+
+		if !rsfield.IsExported() {
+			continue
+		}
+
+		columnName := rsfield.Tag.Get("db")
+		if columnName == "" || columnName == "-" {
+			continue
+		}
+
+		if idColumn == columnName {
+			idValue, err := convertValueToDB(q, rvfield.Interface())
+			if err != nil {
+				return "", nil, err
+			}
+
+			matchClause = fmt.Sprintf("(%s = :%s)", columnName, params.Add(idValue))
+
+			continue
+		}
+
+		if rsfield.Type.Kind() == reflect.Ptr && rvfield.IsNil() {
+
+			setClauses = append(setClauses, fmt.Sprintf("%s = NULL", columnName))
+
+		} else {
+
+			val, err := convertValueToDB(q, rvfield.Interface())
+			if err != nil {
+				return "", nil, err
+			}
+
+			setClauses = append(setClauses, fmt.Sprintf("%s = :%s", columnName, params.Add(val)))
+
+		}
+	}
+
+	if len(setClauses) == 0 {
+		return "", nil, exerr.New(exerr.TypeSQLBuild, "no updates clauses found in object").Build()
+	}
+
+	if matchClause == "" {
+		return "", nil, exerr.New(exerr.TypeSQLBuild, "id column not found in object").Build()
+	}
+
+	//goland:noinspection SqlNoDataSourceInspection
+	return fmt.Sprintf("UPDATE %s SET %s WHERE %s", tableName, strings.Join(setClauses, ", "), matchClause), params, nil
+}
+
+func BuildInsertStatement[TData any](q Queryable, tableName string, obj TData) (string, PP, error) {
+	rval := reflect.ValueOf(obj)
+	rtyp := rval.Type()
+
+	params := PP{}
+
+	fields := make([]string, 0)
+	values := make([]string, 0)
+
+	for i := 0; i < rtyp.NumField(); i++ {
+
+		rsfield := rtyp.Field(i)
+		rvfield := rval.Field(i)
+
+		if !rsfield.IsExported() {
+			continue
+		}
+
+		columnName := rsfield.Tag.Get("db")
+		if columnName == "" || columnName == "-" {
+			continue
+		}
+
+		if rsfield.Type.Kind() == reflect.Ptr && rvfield.IsNil() {
+
+			fields = append(fields, columnName)
+			values = append(values, "NULL")
+
+		} else {
+
+			val, err := convertValueToDB(q, rvfield.Interface())
+			if err != nil {
+				return "", nil, err
+			}
+
+			fields = append(fields, columnName)
+			values = append(values, ":"+params.Add(val))
+
+		}
+	}
+
+	if len(fields) == 0 {
+		return "", nil, exerr.New(exerr.TypeSQLBuild, "no fields found in object").Build()
+	}
+
+	//goland:noinspection SqlNoDataSourceInspection
+	return fmt.Sprintf("INSERT INTO %s (%s) VALUES (%s)", tableName, strings.Join(fields, ", "), strings.Join(values, ", ")), params, nil
+}
+
+func BuildInsertMultipleStatement[TData any](q Queryable, tableName string, vArr []TData) (string, PP, error) {
+
+	if len(vArr) == 0 {
+		return "", nil, errors.New("no data supplied")
+	}
+
+	rtyp := reflect.ValueOf(vArr[0]).Type()
+
+	sqlPrefix := ""
+	{
+		columns := make([]string, 0)
+
+		for i := 0; i < rtyp.NumField(); i++ {
+			rsfield := rtyp.Field(i)
+
+			if !rsfield.IsExported() {
+				continue
+			}
+
+			columnName := rsfield.Tag.Get("db")
+			if columnName == "" || columnName == "-" {
+				continue
+			}
+
+			columns = append(columns, "\""+columnName+"\"")
+		}
+
+		sqlPrefix = fmt.Sprintf("INSERT"+" INTO \"%s\" (%s) VALUES", tableName, strings.Join(columns, ", "))
+	}
+
+	pp := PP{}
+
+	sqlValuesArr := make([]string, 0)
+
+	for _, v := range vArr {
+
+		rval := reflect.ValueOf(v)
+
+		params := make([]string, 0)
+
+		for i := 0; i < rtyp.NumField(); i++ {
+
+			rsfield := rtyp.Field(i)
+			rvfield := rval.Field(i)
+
+			if !rsfield.IsExported() {
+				continue
+			}
+
+			columnName := rsfield.Tag.Get("db")
+			if columnName == "" || columnName == "-" {
+				continue
+			}
+
+			if rsfield.Type.Kind() == reflect.Ptr && rvfield.IsNil() {
+
+				params = append(params, "NULL")
+
+			} else {
+
+				val, err := convertValueToDB(q, rvfield.Interface())
+				if err != nil {
+					return "", nil, err
+				}
+
+				params = append(params, ":"+pp.Add(val))
+
+			}
+		}
+
+		sqlValuesArr = append(sqlValuesArr, fmt.Sprintf("(%s)", strings.Join(params, ", ")))
+	}
+
+	sqlstr := fmt.Sprintf("%s %s", sqlPrefix, strings.Join(sqlValuesArr, ", "))
+
+	return sqlstr, pp, nil
+}

sq/builder_test.go

@@ -0,0 +1,86 @@
+package sq
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+	"github.com/glebarez/go-sqlite"
+	"github.com/jmoiron/sqlx"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
+	"path/filepath"
+	"testing"
+)
+
+type dummyQueryable struct {
+}
+
+func (d dummyQueryable) Exec(ctx context.Context, sql string, prep PP) (sql.Result, error) {
+	return nil, errors.New("err")
+}
+
+func (d dummyQueryable) Query(ctx context.Context, sql string, prep PP) (*sqlx.Rows, error) {
+	return nil, errors.New("err")
+}
+
+func (d dummyQueryable) ListConverter() []DBTypeConverter {
+	return nil
+}
+
+func TestCreateUpdateStatement(t *testing.T) {
+
+	type request struct {
+		ID        string  `json:"id"        db:"id"`
+		Timestamp int     `json:"timestamp" db:"timestamp"`
+		StrVal    string  `json:"strVal"    db:"str_val"`
+		FloatVal  float64 `json:"floatVal"    db:"float_val"`
+		Dummy     bool    `json:"dummyBool" db:"dummy_bool"`
+		JsonVal   JsonObj `json:"jsonVal" db:"json_val"`
+	}
+
+	if !langext.InArray("sqlite3", sql.Drivers()) {
+		sqlite.RegisterAsSQLITE3()
+	}
+
+	ctx := context.Background()
+
+	dbdir := t.TempDir()
+	dbfile1 := filepath.Join(dbdir, langext.MustHexUUID()+".sqlite3")
+
+	url := fmt.Sprintf("file:%s?_pragma=journal_mode(%s)&_pragma=timeout(%d)&_pragma=foreign_keys(%s)&_pragma=busy_timeout(%d)", dbfile1, "DELETE", 1000, "true", 1000)
+
+	xdb := tst.Must(sqlx.Open("sqlite", url))(t)
+
+	db := NewDB(xdb, DBOptions{RegisterDefaultConverter: langext.PTrue})
+
+	_, err := db.Exec(ctx, "CREATE TABLE `requests` ( id TEXT NOT NULL, timestamp INTEGER NOT NULL, PRIMARY KEY (id) ) STRICT", PP{})
+	tst.AssertNoErr(t, err)
+
+	sqlStr, pp, err := BuildUpdateStatement(db, "requests", request{
+		ID:        "9927",
+		Timestamp: 12321,
+		StrVal:    "hello world",
+		Dummy:     true,
+		FloatVal:  3.14159,
+		JsonVal: JsonObj{
+			"firs":   1,
+			"second": true,
+		},
+	}, "id")
+
+	tst.AssertNoErr(t, err)
+
+	fmt.Printf("\n\n")
+
+	fmt.Printf("######## PP:\n")
+	for k, v := range pp {
+		fmt.Printf("['%s']       =>       %+v\n", k, v)
+	}
+	fmt.Printf("\n\n")
+
+	fmt.Printf("######## SQL:\n%+v\n\n", sqlStr)
+
+	fmt.Printf("\n\n")
+
+}

sq/commentTrimmer.go

@@ -0,0 +1,32 @@
+package sq
+
+import (
+	"context"
+	"strings"
+)
+
+var CommentTrimmer = NewPreListener(fnTrimComments)
+
+func fnTrimComments(ctx context.Context, cmdtype string, id *uint16, sql *string, params *PP) error {
+
+	res := make([]string, 0)
+
+	for _, s := range strings.Split(*sql, "\n") {
+		if strings.HasPrefix(strings.TrimSpace(s), "--") {
+			continue
+		}
+
+		idx := strings.Index(s, "--")
+		if idx != -1 {
+			s = s[:idx]
+		}
+
+		s = strings.TrimRight(s, " \t\r\n")
+
+		res = append(res, s)
+	}
+
+	*sql = strings.Join(res, "\n")
+
+	return nil
+}

sq/converter.go

@@ -4,17 +4,9 @@ import (
 	"errors"
 	"fmt"
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
-	"time"
+	"reflect"
 )
 
-//TODO UNFINISHED
-// this is not finished
-// idea was that we can register converter in the database struct
-// they get inherited from the transactions
-// and when marshallingunmarshaling (sq.Query | sq.QueryAll)
-// or marshaling (sq.InsertSingle)
-// the types get converter automatically...
-
 type DBTypeConverter interface {
 	ModelTypeString() string
 	DBTypeString() string
@@ -22,37 +14,16 @@ type DBTypeConverter interface {
 	DBToModel(v any) (any, error)
 }
 
-var ConverterBoolToBit = NewDBTypeConverter[bool, int](func(v bool) (int, error) {
+type DBDataConstraint interface {
-	return langext.Conditional(v, 1, 0), nil
+	string | langext.NumberConstraint | []byte
-}, func(v int) (bool, error) {
+}
-	if v == 0 {
-		return false, nil
-	}
-	if v == 1 {
-		return true, nil
-	}
-	return false, errors.New(fmt.Sprintf("invalid valud for boolean: '%d'", v))
-})
 
-var ConverterTimeToUnixMillis = NewDBTypeConverter[time.Time, int64](func(v time.Time) (int64, error) {
+type DatabaseConvertible[TModelData any, TDBData DBDataConstraint] interface {
-	return v.UnixMilli(), nil
+	MarshalToDB(v TModelData) (TDBData, error)
-}, func(v int64) (time.Time, error) {
+	UnmarshalToModel(v TDBData) (TModelData, error)
-	return time.UnixMilli(v), nil
+}
-})
 
-var ConverterOptTimeToUnixMillis = NewDBTypeConverter[*time.Time, *int64](func(v *time.Time) (*int64, error) {
+type dbTypeConverterImpl[TModelData any, TDBData DBDataConstraint] struct {
-	if v == nil {
-		return nil, nil
-	}
-	return langext.Ptr(v.UnixMilli()), nil
-}, func(v *int64) (*time.Time, error) {
-	if v == nil {
-		return nil, nil
-	}
-	return langext.Ptr(time.UnixMilli(*v)), nil
-})
-
-type dbTypeConverterImpl[TModelData any, TDBData any] struct {
 	dbTypeString    string
 	modelTypeString string
 	todb            func(v TModelData) (TDBData, error)
@@ -81,7 +52,7 @@ func (t *dbTypeConverterImpl[TModelData, TDBData]) DBToModel(v any) (any, error)
 	return nil, errors.New(fmt.Sprintf("Unexpected value in DBTypeConverter, expected '%s', found '%T'", t.dbTypeString, v))
 }
 
-func NewDBTypeConverter[TModelData any, TDBData any](todb func(v TModelData) (TDBData, error), tomodel func(v TDBData) (TModelData, error)) DBTypeConverter {
+func NewDBTypeConverter[TModelData any, TDBData DBDataConstraint](todb func(v TModelData) (TDBData, error), tomodel func(v TDBData) (TModelData, error)) DBTypeConverter {
 	return &dbTypeConverterImpl[TModelData, TDBData]{
 		dbTypeString:    fmt.Sprintf("%T", *new(TDBData)),
 		modelTypeString: fmt.Sprintf("%T", *new(TModelData)),
@@ -89,3 +60,45 @@ func NewDBTypeConverter[TModelData any, TDBData any](todb func(v TModelData) (TD
 		tomodel:         tomodel,
 	}
 }
+
+func NewAutoDBTypeConverter[TDBData DBDataConstraint, TModelData DatabaseConvertible[TModelData, TDBData]](obj TModelData) DBTypeConverter {
+	return &dbTypeConverterImpl[TModelData, TDBData]{
+		dbTypeString:    fmt.Sprintf("%T", *new(TDBData)),
+		modelTypeString: fmt.Sprintf("%T", *new(TModelData)),
+		todb:            obj.MarshalToDB,
+		tomodel:         obj.UnmarshalToModel,
+	}
+}
+
+func convertValueToDB(q Queryable, value any) (any, error) {
+	modelTypeStr := fmt.Sprintf("%T", value)
+
+	for _, conv := range q.ListConverter() {
+		if conv.ModelTypeString() == modelTypeStr {
+			return conv.ModelToDB(value)
+		}
+	}
+
+	if value != nil && reflect.TypeOf(value).Kind() == reflect.Ptr {
+		vof := reflect.ValueOf(value)
+		if vof.IsNil() {
+			return nil, nil
+		} else {
+			return convertValueToDB(q, vof.Elem().Interface())
+		}
+	}
+
+	return value, nil
+}
+
+func convertValueToModel(q Queryable, value any, destinationType string) (any, error) {
+	dbTypeString := fmt.Sprintf("%T", value)
+
+	for _, conv := range q.ListConverter() {
+		if conv.ModelTypeString() == destinationType && conv.DBTypeString() == dbTypeString {
+			return conv.DBToModel(value)
+		}
+	}
+
+	return value, nil
+}

sq/converterDefault.go

@@ -0,0 +1,147 @@
+package sq
+
+import (
+	"errors"
+	"fmt"
+	"gogs.mikescher.com/BlackForestBytes/goext/exerr"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"gogs.mikescher.com/BlackForestBytes/goext/rfctime"
+	"gogs.mikescher.com/BlackForestBytes/goext/timeext"
+	"time"
+)
+
+// ========================== COMMON DATATYPES ==========================
+
+var ConverterBoolToBit = NewDBTypeConverter[bool, int64](func(v bool) (int64, error) {
+	return langext.Conditional(v, int64(1), int64(0)), nil
+}, func(v int64) (bool, error) {
+	if v == 0 {
+		return false, nil
+	}
+	if v == 1 {
+		return true, nil
+	}
+	return false, errors.New(fmt.Sprintf("invalid valud for boolean: '%d'", v))
+})
+
+var ConverterTimeToUnixMillis = NewDBTypeConverter[time.Time, int64](func(v time.Time) (int64, error) {
+	return v.UnixMilli(), nil
+}, func(v int64) (time.Time, error) {
+	return time.UnixMilli(v), nil
+})
+
+// ========================== RFCTIME ==========================
+
+var ConverterRFCUnixMilliTimeToUnixMillis = NewDBTypeConverter[rfctime.UnixMilliTime, int64](func(v rfctime.UnixMilliTime) (int64, error) {
+	return v.UnixMilli(), nil
+}, func(v int64) (rfctime.UnixMilliTime, error) {
+	return rfctime.NewUnixMilli(time.UnixMilli(v)), nil
+})
+
+var ConverterRFCUnixNanoTimeToUnixNanos = NewDBTypeConverter[rfctime.UnixNanoTime, int64](func(v rfctime.UnixNanoTime) (int64, error) {
+	return v.UnixNano(), nil
+}, func(v int64) (rfctime.UnixNanoTime, error) {
+	return rfctime.NewUnixNano(time.Unix(0, v)), nil
+})
+
+var ConverterRFCUnixTimeToUnixSeconds = NewDBTypeConverter[rfctime.UnixTime, int64](func(v rfctime.UnixTime) (int64, error) {
+	return v.Unix(), nil
+}, func(v int64) (rfctime.UnixTime, error) {
+	return rfctime.NewUnix(time.Unix(v, 0)), nil
+})
+
+// ConverterRFC339TimeToString
+// Does not really use RFC339 - but sqlite does not understand timezones and the `T` delimiter
+var ConverterRFC339TimeToString = NewDBTypeConverter[rfctime.RFC3339Time, string](func(v rfctime.RFC3339Time) (string, error) {
+	return v.Time().In(time.UTC).Format("2006-01-02 15:04:05"), nil
+}, func(v string) (rfctime.RFC3339Time, error) {
+	t, err := time.Parse("2006-01-02 15:04:05", v)
+	if err != nil {
+		return rfctime.RFC3339Time{}, err
+	}
+	return rfctime.NewRFC3339(t), nil
+})
+
+// ConverterRFC339NanoTimeToString
+// Does not really use RFC339 - but sqlite does not understand timezones and the `T` delimiter
+var ConverterRFC339NanoTimeToString = NewDBTypeConverter[rfctime.RFC3339NanoTime, string](func(v rfctime.RFC3339NanoTime) (string, error) {
+	return v.Time().In(time.UTC).Format("2006-01-02 15:04:05.999999999"), nil
+}, func(v string) (rfctime.RFC3339NanoTime, error) {
+	t, err := time.ParseInLocation("2006-01-02 15:04:05.999999999", v, time.UTC)
+	if err != nil {
+		return rfctime.RFC3339NanoTime{}, err
+	}
+	return rfctime.NewRFC3339Nano(t), nil
+})
+
+var ConverterRFCDateToString = NewDBTypeConverter[rfctime.Date, string](func(v rfctime.Date) (string, error) {
+	return fmt.Sprintf("%04d-%02d-%02d", v.Year, v.Month, v.Day), nil
+}, func(v string) (rfctime.Date, error) {
+	d := rfctime.Date{}
+	if err := d.ParseString(v); err != nil {
+		return rfctime.Date{}, err
+	} else {
+		return d, nil
+	}
+})
+
+var ConverterRFCTimeToString = NewDBTypeConverter[rfctime.Time, string](func(v rfctime.Time) (string, error) {
+	return v.SerializeShort(), nil
+}, func(v string) (rfctime.Time, error) {
+	res := rfctime.Time{}
+	err := res.Deserialize(v)
+	if err != nil {
+		return rfctime.Time{}, err
+	}
+	return res, nil
+})
+
+var ConverterRFCSecondsF64ToString = NewDBTypeConverter[rfctime.SecondsF64, float64](func(v rfctime.SecondsF64) (float64, error) {
+	return v.Seconds(), nil
+}, func(v float64) (rfctime.SecondsF64, error) {
+	return rfctime.NewSecondsF64(timeext.FromSeconds(v)), nil
+})
+
+// ========================== JSON ==========================
+
+var ConverterJsonObjToString = NewAutoDBTypeConverter(JsonObj{})
+
+var ConverterJsonArrToString = NewAutoDBTypeConverter(JsonArr{})
+
+// Json[T] must be registered manually for each gen-type
+
+// ========================== EXERR ==========================
+
+var ConverterExErrCategoryToString = NewDBTypeConverter[exerr.ErrorCategory, string](func(v exerr.ErrorCategory) (string, error) {
+	return v.Category, nil
+}, func(v string) (exerr.ErrorCategory, error) {
+	for _, cat := range exerr.AllCategories {
+		if cat.Category == v {
+			return cat, nil
+		}
+	}
+	return exerr.CatUser, errors.New("failed to convert '" + v + "' to exerr.ErrorCategory")
+})
+
+var ConverterExErrSeverityToString = NewDBTypeConverter[exerr.ErrorSeverity, string](func(v exerr.ErrorSeverity) (string, error) {
+	return v.Severity, nil
+}, func(v string) (exerr.ErrorSeverity, error) {
+	for _, sev := range exerr.AllSeverities {
+		if sev.Severity == v {
+			return sev, nil
+		}
+	}
+	return exerr.SevErr, errors.New("failed to convert '" + v + "' to exerr.ErrorSeverity")
+})
+
+var ConverterExErrTypeToString = NewDBTypeConverter[exerr.ErrorType, string](func(v exerr.ErrorType) (string, error) {
+	return v.Key, nil
+}, func(v string) (exerr.ErrorType, error) {
+	for _, etp := range exerr.ListRegisteredTypes() {
+		if etp.Key == v {
+			return etp, nil
+		}
+	}
+
+	return exerr.NewType(v, nil), nil
+})

sq/database.go

@@ -4,16 +4,24 @@ import (
 	"context"
 	"database/sql"
 	"github.com/jmoiron/sqlx"
+	"gogs.mikescher.com/BlackForestBytes/goext/exerr"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"sync"
 )
 
 type DB interface {
-	Exec(ctx context.Context, sql string, prep PP) (sql.Result, error)
+	Queryable
-	Query(ctx context.Context, sql string, prep PP) (*sqlx.Rows, error)
+
 	Ping(ctx context.Context) error
 	BeginTransaction(ctx context.Context, iso sql.IsolationLevel) (Tx, error)
 	AddListener(listener Listener)
 	Exit() error
+	RegisterConverter(DBTypeConverter)
+}
+
+type DBOptions struct {
+	RegisterDefaultConverter *bool
+	RegisterCommentTrimmer   *bool
 }
 
 type database struct {
@@ -21,15 +29,26 @@ type database struct {
 	txctr uint16
 	lock  sync.Mutex
 	lstr  []Listener
+	conv  []DBTypeConverter
 }
 
-func NewDB(db *sqlx.DB) DB {
+func NewDB(db *sqlx.DB, opt DBOptions) DB {
-	return &database{
+	sqdb := &database{
 		db:    db,
 		txctr: 0,
 		lock:  sync.Mutex{},
 		lstr:  make([]Listener, 0),
 	}
+
+	if langext.Coalesce(opt.RegisterDefaultConverter, true) {
+		sqdb.registerDefaultConverter()
+	}
+
+	if langext.Coalesce(opt.RegisterCommentTrimmer, true) {
+		sqdb.AddListener(CommentTrimmer)
+	}
+
+	return sqdb
 }
 
 func (db *database) AddListener(listener Listener) {
@@ -41,7 +60,7 @@ func (db *database) Exec(ctx context.Context, sqlstr string, prep PP) (sql.Resul
 	for _, v := range db.lstr {
 		err := v.PreExec(ctx, nil, &sqlstr, &prep)
 		if err != nil {
-			return nil, err
+			return nil, exerr.Wrap(err, "failed to call SQL pre-exec listener").Str("original_sql", origsql).Str("sql", sqlstr).Any("sql_params", prep).Build()
 		}
 	}
 
@@ -52,7 +71,7 @@ func (db *database) Exec(ctx context.Context, sqlstr string, prep PP) (sql.Resul
 	}
 
 	if err != nil {
-		return nil, err
+		return nil, exerr.Wrap(err, "Failed to [exec] sql statement").Str("original_sql", origsql).Str("sql", sqlstr).Any("sql_params", prep).Build()
 	}
 	return res, nil
 }
@@ -62,7 +81,7 @@ func (db *database) Query(ctx context.Context, sqlstr string, prep PP) (*sqlx.Ro
 	for _, v := range db.lstr {
 		err := v.PreQuery(ctx, nil, &sqlstr, &prep)
 		if err != nil {
-			return nil, err
+			return nil, exerr.Wrap(err, "failed to call SQL pre-query listener").Str("original_sql", origsql).Str("sql", sqlstr).Any("sql_params", prep).Build()
 		}
 	}
 
@@ -73,7 +92,7 @@ func (db *database) Query(ctx context.Context, sqlstr string, prep PP) (*sqlx.Ro
 	}
 
 	if err != nil {
-		return nil, err
+		return nil, exerr.Wrap(err, "Failed to [query] sql statement").Str("original_sql", origsql).Str("sql", sqlstr).Any("sql_params", prep).Build()
 	}
 	return rows, nil
 }
@@ -93,7 +112,7 @@ func (db *database) Ping(ctx context.Context) error {
 	}
 
 	if err != nil {
-		return err
+		return exerr.Wrap(err, "Failed to [ping] sql database").Build()
 	}
 	return nil
 }
@@ -113,16 +132,47 @@ func (db *database) BeginTransaction(ctx context.Context, iso sql.IsolationLevel
 
 	xtx, err := db.db.BeginTxx(ctx, &sql.TxOptions{Isolation: iso})
 	if err != nil {
-		return nil, err
+		return nil, exerr.Wrap(err, "Failed to start sql transaction").Build()
 	}
 
 	for _, v := range db.lstr {
 		v.PostTxBegin(txid, err)
 	}
 
-	return NewTransaction(xtx, txid, db.lstr), nil
+	return NewTransaction(xtx, txid, db), nil
 }
 
 func (db *database) Exit() error {
 	return db.db.Close()
 }
+
+func (db *database) ListConverter() []DBTypeConverter {
+	return db.conv
+}
+
+func (db *database) RegisterConverter(conv DBTypeConverter) {
+	db.conv = langext.ArrFilter(db.conv, func(v DBTypeConverter) bool { return v.ModelTypeString() != conv.ModelTypeString() })
+	db.conv = append(db.conv, conv)
+}
+
+func (db *database) registerDefaultConverter() {
+	db.RegisterConverter(ConverterBoolToBit)
+
+	db.RegisterConverter(ConverterTimeToUnixMillis)
+
+	db.RegisterConverter(ConverterRFCUnixMilliTimeToUnixMillis)
+	db.RegisterConverter(ConverterRFCUnixNanoTimeToUnixNanos)
+	db.RegisterConverter(ConverterRFCUnixTimeToUnixSeconds)
+	db.RegisterConverter(ConverterRFC339TimeToString)
+	db.RegisterConverter(ConverterRFC339NanoTimeToString)
+	db.RegisterConverter(ConverterRFCDateToString)
+	db.RegisterConverter(ConverterRFCTimeToString)
+	db.RegisterConverter(ConverterRFCSecondsF64ToString)
+
+	db.RegisterConverter(ConverterJsonObjToString)
+	db.RegisterConverter(ConverterJsonArrToString)
+
+	db.RegisterConverter(ConverterExErrCategoryToString)
+	db.RegisterConverter(ConverterExErrSeverityToString)
+	db.RegisterConverter(ConverterExErrTypeToString)
+}

sq/filter.go

@@ -0,0 +1,56 @@
+package sq
+
+import ct "gogs.mikescher.com/BlackForestBytes/goext/cursortoken"
+
+type FilterSort struct {
+	Field     string
+	Direction ct.SortDirection
+}
+
+type PaginateFilter interface {
+	SQL(params PP) (filterClause string, joinClause string, joinTables []string)
+	Sort() []FilterSort
+}
+
+type genericPaginateFilter struct {
+	sql  func(params PP) (filterClause string, joinClause string, joinTables []string)
+	sort func() []FilterSort
+}
+
+func (g genericPaginateFilter) SQL(params PP) (filterClause string, joinClause string, joinTables []string) {
+	return g.sql(params)
+}
+
+func (g genericPaginateFilter) Sort() []FilterSort {
+	return g.sort()
+}
+
+func NewPaginateFilter(sql func(params PP) (filterClause string, joinClause string, joinTables []string), sort []FilterSort) PaginateFilter {
+	return genericPaginateFilter{
+		sql: func(params PP) (filterClause string, joinClause string, joinTables []string) {
+			return sql(params)
+		},
+		sort: func() []FilterSort {
+			return sort
+		},
+	}
+}
+
+func NewSimplePaginateFilter(filterClause string, filterParams PP, sort []FilterSort) PaginateFilter {
+	return genericPaginateFilter{
+		sql: func(params PP) (string, string, []string) {
+			params.AddAll(filterParams)
+			return filterClause, "", nil
+		},
+		sort: func() []FilterSort {
+			return sort
+		},
+	}
+}
+
+func NewEmptyPaginateFilter() PaginateFilter {
+	return genericPaginateFilter{
+		sql:  func(params PP) (string, string, []string) { return "1=1", "", nil },
+		sort: func() []FilterSort { return make([]FilterSort, 0) },
+	}
+}