v0.0.178

.idea/goext.iml

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <module type="WEB_MODULE" version="4">
-  <component name="Go" enabled="true" />
+  <component name="Go" enabled="true">
+    <buildTags>
+      <option name="goVersion" value="1.19" />
+    </buildTags>
+  </component>
   <component name="NewModuleRootManager">
     <content url="file://$MODULE_DIR$" />
     <orderEntry type="inheritedJdk" />

README.md

@@ -10,31 +10,32 @@ Potentially needs `export GOPRIVATE="gogs.mikescher.com"`
 
 ### Packages:
 
-| Name        | Maintainer | Description                                                                                                   |
-|-------------|------------|---------------------------------------------------------------------------------------------------------------|
-| langext     | Mike       | General uttility/helper functions, (everything thats missing from go standard library)                        |
-| mathext     | Mike       | Utility/Helper functions for math                                                                             |
-| cryptext    | Mike       | Utility/Helper functions for encryption                                                                       |
-| syncext     | Mike       | Utility/Helper funtions for multi-threading / mutex / channels                                                |
-| dataext     | Mike       | Various useful data structures                                                                                |
-| zipext      | Mike       | Utility for zip/gzip/tar etc                                                                                  |
-|             |            |                                                                                                               |
-| mongoext    | Mike       | Utility/Helper functions for mongodb                                                                          |
-| cursortoken | Mike       | MongoDB cursortoken implementation                                                                            |
-|             |            |                                                                                                               |
-| totpext     | Mike       | Implementation of TOTP (2-Factor-Auth)                                                                        |
-| termext     | Mike       | Utilities for terminals (mostly color output)                                                                 |
-| confext     | Mike       | Parses environment configuration into structs                                                                 |
-| cmdext      | Mike       | Runner for external commands/processes                                                                        |
-|             |            |                                                                                                               |
-| sq          | Mike       | Utility functions for sql based databases                                                                     |
-| tst         | Mike       | Utility functions for unit tests                                                                              |
-|             |            |                                                                                                               |
-| rfctime     | Mike       | Classes for time seriallization, with different marshallign method for mongo and json                         |
-| gojson      | Mike       | Same interface for marshalling/unmarshalling as go/json, except with proper serialization of null arrays/maps |
-|             |            |                                                                                                               |
-| bfcodegen   | Mike       | Various codegen tools (run via go generate)                                                                   |
-|             |            |                                                                                                               |
-| rext        | Mike       | Regex Wrapper, wraps regexp with a better interface                                                           |
-| wmo         | Mike       | Mongo Wrapper, wraps mongodb with a better interface                                                          |
-|             |            |                                                                                                               |
+| Name         | Maintainer | Description                                                                                                   |
+|--------------|------------|---------------------------------------------------------------------------------------------------------------|
+| langext      | Mike       | General uttility/helper functions, (everything thats missing from go standard library)                        |
+| mathext      | Mike       | Utility/Helper functions for math                                                                             |
+| cryptext     | Mike       | Utility/Helper functions for encryption                                                                       |
+| syncext      | Mike       | Utility/Helper funtions for multi-threading / mutex / channels                                                |
+| dataext      | Mike       | Various useful data structures                                                                                |
+| zipext       | Mike       | Utility for zip/gzip/tar etc                                                                                  |
+| reflectext   | Mike       | Utility for golagn reflection                                                                                 |
+|              |            |                                                                                                               |
+| mongoext     | Mike       | Utility/Helper functions for mongodb                                                                          |
+| cursortoken  | Mike       | MongoDB cursortoken implementation                                                                            |
+|              |            |                                                                                                               |
+| totpext      | Mike       | Implementation of TOTP (2-Factor-Auth)                                                                        |
+| termext      | Mike       | Utilities for terminals (mostly color output)                                                                 |
+| confext      | Mike       | Parses environment configuration into structs                                                                 |
+| cmdext       | Mike       | Runner for external commands/processes                                                                        |
+|              |            |                                                                                                               |
+| sq           | Mike       | Utility functions for sql based databases                                                                     |
+| tst          | Mike       | Utility functions for unit tests                                                                              |
+|              |            |                                                                                                               |
+| rfctime      | Mike       | Classes for time seriallization, with different marshallign method for mongo and json                         |
+| gojson       | Mike       | Same interface for marshalling/unmarshalling as go/json, except with proper serialization of null arrays/maps |
+|              |            |                                                                                                               |
+| bfcodegen    | Mike       | Various codegen tools (run via go generate)                                                                   |
+|              |            |                                                                                                               |
+| rext         | Mike       | Regex Wrapper, wraps regexp with a better interface                                                           |
+| wmo          | Mike       | Mongo Wrapper, wraps mongodb with a better interface                                                          |
+|              |            |                                                                                                               |

_data/version.sh

@@ -23,6 +23,8 @@ fi
 
 git pull --ff
 
+go get -u ./...
+
 curr_vers=$(git describe --tags --abbrev=0 | sed 's/v//g')
 
 next_ver=$(echo "$curr_vers" | awk -F. -v OFS=. 'NF==1{print ++$NF}; NF>1{if(length($NF+1)>length($NF))$(NF-1)++; $NF=sprintf("%0*d", length($NF), ($NF+1)%(10^length($NF))); print}')
@@ -32,6 +34,8 @@ echo "> Current Version: ${curr_vers}"
 echo "> Next    Version: ${next_ver}"
 echo ""
 
+printf "package goext\n\nconst GoextVersion = \"%s\"\n\nconst GoextVersionTimestamp = \"%s\"\n" "${next_ver}" "$( date +"%Y-%m-%dT%H:%M:%S%z" )" > "goextVersion.go"
+
 git add --verbose .
 
 msg="v${next_ver}"

bfcodegen/enum-generate.go

@@ -3,11 +3,15 @@ package bfcodegen
 import (
 	"errors"
 	"fmt"
+	"gogs.mikescher.com/BlackForestBytes/goext"
 	"gogs.mikescher.com/BlackForestBytes/goext/cmdext"
+	"gogs.mikescher.com/BlackForestBytes/goext/cryptext"
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"gogs.mikescher.com/BlackForestBytes/goext/rext"
 	"io"
 	"os"
+	"path"
+	"path/filepath"
 	"regexp"
 	"strings"
 	"time"
@@ -21,6 +25,7 @@ type EnumDefVal struct {
 
 type EnumDef struct {
 	File         string
+	FileRelative string
 	EnumTypeName string
 	Type         string
 	Values       []EnumDefVal
@@ -32,6 +37,8 @@ var rexEnumDef = rext.W(regexp.MustCompile("^\\s*type\\s+(?P<name>[A-Za-z0-9_]+)
 
 var rexValueDef = 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_:]+\"|[0-9]+))\\s*(//(?P<descr>.*))?.*$"))
 
+var rexChecksumConst = rext.W(regexp.MustCompile("const ChecksumGenerator = \"(?P<cs>[A-Za-z0-9_]*)\""))
+
 func GenerateEnumSpecs(sourceDir string, destFile string) error {
 
 	files, err := os.ReadDir(sourceDir)
@@ -39,17 +46,46 @@ func GenerateEnumSpecs(sourceDir string, destFile string) error {
 		return err
 	}
 
+	oldChecksum := "N/A"
+	if _, err := os.Stat(destFile); !os.IsNotExist(err) {
+		content, err := os.ReadFile(destFile)
+		if err != nil {
+			return err
+		}
+		if m, ok := rexChecksumConst.MatchFirst(string(content)); ok {
+			oldChecksum = m.GroupByName("cs").Value()
+		}
+	}
+
+	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") })
+	langext.SortBy(files, func(v os.DirEntry) string { return v.Name() })
+
+	newChecksumStr := goext.GoextVersion
+	for _, f := range files {
+		content, err := os.ReadFile(path.Join(sourceDir, f.Name()))
+		if err != nil {
+			return err
+		}
+		newChecksumStr += "\n" + f.Name() + "\t" + cryptext.BytesSha256(content)
+	}
+
+	newChecksum := cryptext.BytesSha256([]byte(newChecksumStr))
+
+	if newChecksum != oldChecksum {
+		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
+	}
+
 	allEnums := make([]EnumDef, 0)
 
 	pkgname := ""
 
 	for _, f := range files {
-		if !strings.HasSuffix(f.Name(), ".go") {
-			continue
-		}
-
 		fmt.Printf("========= %s =========\n\n", f.Name())
-		fileEnums, pn, err := processFile(f.Name())
+		fileEnums, pn, err := processFile(sourceDir, path.Join(sourceDir, f.Name()))
 		if err != nil {
 			return err
 		}
@@ -67,7 +103,7 @@ func GenerateEnumSpecs(sourceDir string, destFile string) error {
 		return errors.New("no package name found in any file")
 	}
 
-	err = os.WriteFile(destFile, []byte(fmtOutput(allEnums, pkgname)), 0o755)
+	err = os.WriteFile(destFile, []byte(fmtOutput(newChecksum, allEnums, pkgname)), 0o755)
 	if err != nil {
 		return err
 	}
@@ -89,7 +125,7 @@ func GenerateEnumSpecs(sourceDir string, destFile string) error {
 	return nil
 }
 
-func processFile(fn string) ([]EnumDef, string, error) {
+func processFile(basedir string, fn string) ([]EnumDef, string, error) {
 	file, err := os.Open(fn)
 	if err != nil {
 		return nil, "", err
@@ -119,8 +155,15 @@ func processFile(fn string) ([]EnumDef, string, error) {
 		}
 
 		if match, ok := rexEnumDef.MatchFirst(line); ok {
+
+			rfp, err := filepath.Rel(basedir, fn)
+			if err != nil {
+				return nil, "", err
+			}
+
 			def := EnumDef{
 				File:         fn,
+				FileRelative: rfp,
 				EnumTypeName: match.GroupByName("name").Value(),
 				Type:         match.GroupByName("type").Value(),
 				Values:       make([]EnumDefVal, 0),
@@ -159,8 +202,8 @@ func processFile(fn string) ([]EnumDef, string, error) {
 	return enums, pkgname, nil
 }
 
-func fmtOutput(enums []EnumDef, pkgname string) string {
-	str := "// Code generated by permissions_gen.sh DO NOT EDIT.\n"
+func fmtOutput(cs string, enums []EnumDef, pkgname string) string {
+	str := "// Code generated by enum-generate.go DO NOT EDIT.\n"
 	str += "\n"
 	str += "package " + pkgname + "\n"
 	str += "\n"
@@ -168,6 +211,9 @@ func fmtOutput(enums []EnumDef, pkgname string) string {
 	str += "import \"gogs.mikescher.com/BlackForestBytes/goext/langext\"" + "\n"
 	str += "\n"
 
+	str += "const ChecksumGenerator = \"" + cs + "\"" + "\n"
+	str += "\n"
+
 	str += "type Enum interface {" + "\n"
 	str += "    Valid() bool" + "\n"
 	str += "    ValuesAny() []any" + "\n"
@@ -202,7 +248,7 @@ func fmtOutput(enums []EnumDef, pkgname string) string {
 
 		str += "// ================================ " + enumdef.EnumTypeName + " ================================" + "\n"
 		str += "//" + "\n"
-		str += "// File:       " + enumdef.File + "\n"
+		str += "// File:       " + enumdef.FileRelative + "\n"
 		str += "// StringEnum: " + langext.Conditional(hasStr, "true", "false") + "\n"
 		str += "// DescrEnum:  " + langext.Conditional(hasDescr, "true", "false") + "\n"
 		str += "//" + "\n"

bfcodegen/enum-generate_test.go

@@ -0,0 +1,15 @@
+package bfcodegen
+
+import (
+	"testing"
+)
+
+func TestApplyEnvOverridesSimple(t *testing.T) {
+
+	err := GenerateEnumSpecs("/home/mike/Code/reiff/badennet/bnet-backend/models", "/home/mike/Code/reiff/badennet/bnet-backend/models/enums_gen.go")
+	if err != nil {
+		t.Error(err)
+		t.Fail()
+	}
+
+}

confext/confParser.go

@@ -178,9 +178,9 @@ func parseEnvToValue(envval string, fullEnvKey string, rvtype reflect.Type) (ref
 		if strings.TrimSpace(strings.ToLower(envval)) == "true" {
 			return reflect.ValueOf(true).Convert(rvtype), nil
 		} else if strings.TrimSpace(strings.ToLower(envval)) == "false" {
-			return reflect.ValueOf(true).Convert(rvtype), nil
-		} else if strings.TrimSpace(strings.ToLower(envval)) == "1" {
 			return reflect.ValueOf(false).Convert(rvtype), nil
+		} else if strings.TrimSpace(strings.ToLower(envval)) == "1" {
+			return reflect.ValueOf(true).Convert(rvtype), nil
 		} else if strings.TrimSpace(strings.ToLower(envval)) == "0" {
 			return reflect.ValueOf(false).Convert(rvtype), nil
 		} else {

cryptext/passHash.go

@@ -3,6 +3,7 @@ package cryptext
 import (
 	"crypto/rand"
 	"crypto/sha256"
+	"crypto/sha512"
 	"encoding/base64"
 	"encoding/hex"
 	"errors"
@@ -14,14 +15,15 @@ import (
 	"strings"
 )
 
-const LatestPassHashVersion = 4
+const LatestPassHashVersion = 5
 
 // PassHash
-// - [v0]: plaintext password ( `0|...` )
-// - [v1]: sha256(plaintext)
-// - [v2]: seed | sha256<seed>(plaintext)
-// - [v3]: seed | sha256<seed>(plaintext) | [hex(totp)]
-// - [v4]: bcrypt(plaintext) | [hex(totp)]
+// - [v0]: plaintext password ( `0|...` )                  // simple, used to write PW's directly in DB
+// - [v1]: sha256(plaintext)                               // simple hashing
+// - [v2]: seed | sha256<seed>(plaintext)                  // add seed
+// - [v3]: seed | sha256<seed>(plaintext) | [hex(totp)]    // add TOTP support
+// - [v4]: bcrypt(plaintext) | [hex(totp)]                 // use proper bcrypt
+// - [v5]: bcrypt(sha512(plaintext)) | [hex(totp)]         // hash pw before bcrypt (otherwise max pw-len = 72)
 type PassHash string
 
 func (ph PassHash) Valid() bool {
@@ -109,7 +111,21 @@ func (ph PassHash) Data() (_version int, _seed []byte, _payload []byte, _totp bo
 		totp := false
 		totpsecret := make([]byte, 0)
 		if split[2] != "0" {
-			totpsecret, err = hex.DecodeString(split[3])
+			totpsecret, err = hex.DecodeString(split[2])
+			totp = true
+		}
+		return int(version), nil, payload, totp, totpsecret, true
+	}
+
+	if version == 5 {
+		if len(split) != 3 {
+			return -1, nil, nil, false, nil, false
+		}
+		payload := []byte(split[1])
+		totp := false
+		totpsecret := make([]byte, 0)
+		if split[2] != "0" {
+			totpsecret, err = hex.DecodeString(split[2])
 			totp = true
 		}
 		return int(version), nil, payload, totp, totpsecret, true
@@ -156,6 +172,14 @@ func (ph PassHash) Verify(plainpass string, totp *string) bool {
 		}
 	}
 
+	if version == 5 {
+		if !hastotp {
+			return bcrypt.CompareHashAndPassword(payload, hash512(plainpass)) == nil
+		} else {
+			return bcrypt.CompareHashAndPassword(payload, hash512(plainpass)) == nil && totpext.Validate(totpsecret, *totp)
+		}
+	}
+
 	return false
 }
 
@@ -209,6 +233,12 @@ func (ph PassHash) ClearTOTP() (PassHash, error) {
 		return PassHash(strings.Join(split, "|")), nil
 	}
 
+	if version == 5 {
+		split := strings.Split(string(ph), "|")
+		split[2] = "0"
+		return PassHash(strings.Join(split, "|")), nil
+	}
+
 	return "", errors.New("unknown version")
 }
 
@@ -242,6 +272,12 @@ func (ph PassHash) WithTOTP(totpSecret []byte) (PassHash, error) {
 		return PassHash(strings.Join(split, "|")), nil
 	}
 
+	if version == 5 {
+		split := strings.Split(string(ph), "|")
+		split[2] = hex.EncodeToString(totpSecret)
+		return PassHash(strings.Join(split, "|")), nil
+	}
+
 	return "", errors.New("unknown version")
 }
 
@@ -271,6 +307,10 @@ func (ph PassHash) Change(newPlainPass string) (PassHash, error) {
 		return HashPasswordV4(newPlainPass, langext.Conditional(hastotp, totpsecret, nil))
 	}
 
+	if version == 5 {
+		return HashPasswordV5(newPlainPass, langext.Conditional(hastotp, totpsecret, nil))
+	}
+
 	return "", errors.New("unknown version")
 }
 
@@ -279,7 +319,24 @@ func (ph PassHash) String() string {
 }
 
 func HashPassword(plainpass string, totpSecret []byte) (PassHash, error) {
-	return HashPasswordV4(plainpass, totpSecret)
+	return HashPasswordV5(plainpass, totpSecret)
+}
+
+func HashPasswordV5(plainpass string, totpSecret []byte) (PassHash, error) {
+	var strtotp string
+
+	if totpSecret == nil {
+		strtotp = "0"
+	} else {
+		strtotp = hex.EncodeToString(totpSecret)
+	}
+
+	payload, err := bcrypt.GenerateFromPassword(hash512(plainpass), bcrypt.MinCost)
+	if err != nil {
+		return "", err
+	}
+
+	return PassHash(fmt.Sprintf("5|%s|%s", string(payload), strtotp)), nil
 }
 
 func HashPasswordV4(plainpass string, totpSecret []byte) (PassHash, error) {
@@ -340,6 +397,13 @@ func HashPasswordV0(plainpass string) (PassHash, error) {
 	return PassHash(fmt.Sprintf("0|%s", plainpass)), nil
 }
 
+func hash512(s string) []byte {
+	h := sha512.New()
+	h.Write([]byte(s))
+	bs := h.Sum(nil)
+	return bs
+}
+
 func hash256(s string) []byte {
 	h := sha256.New()
 	h.Write([]byte(s))

cryptext/passHash_test.go

@@ -0,0 +1,210 @@
+package cryptext
+
+import (
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"gogs.mikescher.com/BlackForestBytes/goext/totpext"
+	"gogs.mikescher.com/BlackForestBytes/goext/tst"
+	"testing"
+)
+
+func TestPassHash1(t *testing.T) {
+	ph, err := HashPassword("test123", nil)
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertFalse(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+}
+
+func TestPassHashTOTP(t *testing.T) {
+	sec, err := totpext.GenerateSecret()
+	tst.AssertNoErr(t, err)
+
+	ph, err := HashPassword("test123", sec)
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertTrue(t, ph.HasTOTP())
+	tst.AssertFalse(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertFalse(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+	tst.AssertTrue(t, ph.Verify("test123", langext.Ptr(totpext.TOTP(sec))))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+}
+
+func TestPassHashUpgrade_V0(t *testing.T) {
+	ph, err := HashPasswordV0("test123")
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertTrue(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+	ph, err = ph.Upgrade("test123")
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertFalse(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+}
+
+func TestPassHashUpgrade_V1(t *testing.T) {
+	ph, err := HashPasswordV1("test123")
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertTrue(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+	ph, err = ph.Upgrade("test123")
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertFalse(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+}
+
+func TestPassHashUpgrade_V2(t *testing.T) {
+	ph, err := HashPasswordV2("test123")
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertTrue(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+	ph, err = ph.Upgrade("test123")
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertFalse(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+}
+
+func TestPassHashUpgrade_V3(t *testing.T) {
+	ph, err := HashPasswordV3("test123", nil)
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertTrue(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+	ph, err = ph.Upgrade("test123")
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertFalse(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+}
+
+func TestPassHashUpgrade_V3_TOTP(t *testing.T) {
+	sec, err := totpext.GenerateSecret()
+	tst.AssertNoErr(t, err)
+
+	ph, err := HashPasswordV3("test123", sec)
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertTrue(t, ph.HasTOTP())
+	tst.AssertTrue(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertFalse(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+	tst.AssertTrue(t, ph.Verify("test123", langext.Ptr(totpext.TOTP(sec))))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+	ph, err = ph.Upgrade("test123")
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertTrue(t, ph.HasTOTP())
+	tst.AssertFalse(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertFalse(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+	tst.AssertTrue(t, ph.Verify("test123", langext.Ptr(totpext.TOTP(sec))))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+}
+
+func TestPassHashUpgrade_V4(t *testing.T) {
+	ph, err := HashPasswordV4("test123", nil)
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertTrue(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+	ph, err = ph.Upgrade("test123")
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertFalse(t, ph.HasTOTP())
+	tst.AssertFalse(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertTrue(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+}
+
+func TestPassHashUpgrade_V4_TOTP(t *testing.T) {
+	sec, err := totpext.GenerateSecret()
+	tst.AssertNoErr(t, err)
+
+	ph, err := HashPasswordV4("test123", sec)
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertTrue(t, ph.HasTOTP())
+	tst.AssertTrue(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertFalse(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+	tst.AssertTrue(t, ph.Verify("test123", langext.Ptr(totpext.TOTP(sec))))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+
+	ph, err = ph.Upgrade("test123")
+	tst.AssertNoErr(t, err)
+
+	tst.AssertTrue(t, ph.Valid())
+	tst.AssertTrue(t, ph.HasTOTP())
+	tst.AssertFalse(t, ph.NeedsPasswordUpgrade())
+
+	tst.AssertFalse(t, ph.Verify("test123", nil))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+	tst.AssertTrue(t, ph.Verify("test123", langext.Ptr(totpext.TOTP(sec))))
+	tst.AssertFalse(t, ph.Verify("test124", nil))
+}

cursortoken/filter.go

@@ -6,5 +6,5 @@ import (
 
 type Filter interface {
 	FilterQuery() mongo.Pipeline
-	Pagination() (string, SortDirection, *string, *SortDirection)
+	Pagination() (string, SortDirection, string, SortDirection)
 }

ginext/apiError.go

@@ -0,0 +1,16 @@
+package ginext
+
+type apiError struct {
+	ErrorCode        string  `json:"errorcode"`
+	Message          string  `json:"message"`
+	FAPIErrorMessage *string `json:"fapiMessage,omitempty"`
+}
+
+type extAPIError struct {
+	ErrorCode        string  `json:"errorcode"`
+	Message          string  `json:"message"`
+	FAPIErrorMessage *string `json:"fapiMessage,omitempty"`
+
+	RawError *string  `json:"__error"`
+	Trace    []string `json:"__trace"`
+}

ginext/appContext.go

@@ -0,0 +1,59 @@
+package ginext
+
+import (
+	"context"
+	"github.com/gin-gonic/gin"
+	"time"
+)
+
+type AppContext struct {
+	inner      context.Context
+	cancelFunc context.CancelFunc
+	cancelled  bool
+	GinContext *gin.Context
+}
+
+func CreateAppContext(g *gin.Context, innerCtx context.Context, cancelFn context.CancelFunc) *AppContext {
+	return &AppContext{
+		inner:      innerCtx,
+		cancelFunc: cancelFn,
+		cancelled:  false,
+		GinContext: g,
+	}
+}
+
+func (ac *AppContext) Deadline() (deadline time.Time, ok bool) {
+	return ac.inner.Deadline()
+}
+
+func (ac *AppContext) Done() <-chan struct{} {
+	return ac.inner.Done()
+}
+
+func (ac *AppContext) Err() error {
+	return ac.inner.Err()
+}
+
+func (ac *AppContext) Value(key any) any {
+	return ac.inner.Value(key)
+}
+
+func (ac *AppContext) Cancel() {
+	ac.cancelled = true
+	ac.cancelFunc()
+}
+
+func (ac *AppContext) RequestURI() string {
+	if ac.GinContext != nil && ac.GinContext.Request != nil {
+		return ac.GinContext.Request.Method + " :: " + ac.GinContext.Request.RequestURI
+	} else {
+		return ""
+	}
+}
+
+func (ac *AppContext) FinishSuccess(res HTTPResponse) HTTPResponse {
+	if ac.cancelled {
+		panic("Cannot finish a cancelled request")
+	}
+	return res
+}

ginext/commonApiErr/enums.go

@@ -0,0 +1,21 @@
+package commonApiErr
+
+type APIErrorCode struct {
+	HTTPStatusCode int
+	Key            string
+}
+
+//goland:noinspection GoSnakeCaseUsage
+var (
+	NotImplemented = APIErrorCode{500, "NOT_IMPLEMENTED"}
+	InternalError  = APIErrorCode{500, "INTERNAL_ERROR"}
+	Panic          = APIErrorCode{500, "PANIC"}
+
+	BindFailURI      = APIErrorCode{400, "BINDFAIL_URI"}
+	BindFailQuery    = APIErrorCode{400, "BINDFAIL_QUERY"}
+	BindFailJSON     = APIErrorCode{400, "BINDFAIL_JSON"}
+	BindFailFormData = APIErrorCode{400, "BINDFAIL_FORMDATA"}
+
+	Unauthorized = APIErrorCode{401, "UNAUTHORIZED"}
+	AuthFailed   = APIErrorCode{401, "AUTH_FAILED"}
+)

ginext/commonHandler.go

@@ -0,0 +1,23 @@
+package ginext
+
+import (
+	"net/http"
+)
+
+func RedirectFound(newuri string) WHandlerFunc {
+	return func(pctx PreContext) HTTPResponse {
+		return Redirect(http.StatusFound, newuri)
+	}
+}
+
+func RedirectTemporary(newuri string) WHandlerFunc {
+	return func(pctx PreContext) HTTPResponse {
+		return Redirect(http.StatusTemporaryRedirect, newuri)
+	}
+}
+
+func RedirectPermanent(newuri string) WHandlerFunc {
+	return func(pctx PreContext) HTTPResponse {
+		return Redirect(http.StatusPermanentRedirect, newuri)
+	}
+}

ginext/cors.go

@@ -0,0 +1,21 @@
+package ginext
+
+import (
+	"github.com/gin-gonic/gin"
+	"net/http"
+)
+
+func CorsMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.Writer.Header().Set("Access-Control-Allow-Origin", "*")
+		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
+		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
+		c.Writer.Header().Set("Access-Control-Allow-Methods", "OPTIONS, GET, POST, PUT, PATCH, DELETE, COUNT")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(http.StatusOK)
+		} else {
+			c.Next()
+		}
+	}
+}

ginext/engine.go

@@ -0,0 +1,52 @@
+package ginext
+
+import (
+	"github.com/gin-gonic/gin"
+	"net/http"
+	"time"
+)
+
+type GinWrapper struct {
+	engine          *gin.Engine
+	SuppressGinLogs bool
+
+	allowCors       bool
+	ginDebug        bool
+	returnRawErrors bool
+	requestTimeout  time.Duration
+}
+
+func NewEngine(allowCors bool, ginDebug bool, returnRawErrors bool, timeout time.Duration) *GinWrapper {
+	engine := gin.New()
+
+	wrapper := &GinWrapper{
+		engine:          engine,
+		SuppressGinLogs: false,
+		allowCors:       allowCors,
+		ginDebug:        ginDebug,
+		returnRawErrors: returnRawErrors,
+		requestTimeout:  timeout,
+	}
+
+	engine.RedirectFixedPath = false
+	engine.RedirectTrailingSlash = false
+
+	if allowCors {
+		engine.Use(CorsMiddleware())
+	}
+
+	if ginDebug {
+		ginlogger := gin.Logger()
+		engine.Use(func(context *gin.Context) {
+			if !wrapper.SuppressGinLogs {
+				ginlogger(context)
+			}
+		})
+	}
+
+	return wrapper
+}
+
+func (w *GinWrapper) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
+	w.engine.ServeHTTP(writer, request)
+}

ginext/funcWrapper.go

@@ -0,0 +1,38 @@
+package ginext
+
+import (
+	"errors"
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"github.com/rs/zerolog/log"
+)
+
+type WHandlerFunc func(PreContext) HTTPResponse
+
+func Wrap(w *GinWrapper, fn WHandlerFunc) gin.HandlerFunc {
+
+	return func(g *gin.Context) {
+
+		g.Set("__returnRawErrors", w.returnRawErrors)
+
+		reqctx := g.Request.Context()
+
+		wrap, stackTrace, panicObj := callPanicSafe(fn, PreContext{wrapper: w, ginCtx: g})
+		if panicObj != nil {
+			fmt.Printf("\n======== ======== STACKTRACE ======== ========\n%s\n======== ======== ======== ========\n\n", stackTrace)
+			log.Error().
+				Interface("panicObj", panicObj).
+				Str("trace", stackTrace).
+				Msg("Panic occured (in gin handler)")
+			wrap = APIError(g, commonApiErr.Panic, "A panic occured in the HTTP handler", errors.New(fmt.Sprintf("%+v", panicObj)))
+		}
+
+		if g.Writer.Written() {
+			panic("Writing in WrapperFunc is not supported")
+		}
+
+		if reqctx.Err() == nil {
+			wrap.Write(g)
+		}
+	}
+}

ginext/preContext.go

@@ -0,0 +1,90 @@
+package ginext
+
+import (
+	"context"
+	"github.com/gin-gonic/gin"
+	"github.com/gin-gonic/gin/binding"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"runtime/debug"
+)
+
+type PreContext struct {
+	ginCtx  *gin.Context
+	wrapper *GinWrapper
+	uri     any
+	query   any
+	body    any
+	form    any
+}
+
+func (pctx *PreContext) URI(uri any) *PreContext {
+	pctx.uri = uri
+	return pctx
+}
+
+func (pctx *PreContext) Query(query any) *PreContext {
+	pctx.query = query
+	return pctx
+}
+
+func (pctx *PreContext) Body(body any) *PreContext {
+	pctx.body = body
+	return pctx
+}
+
+func (pctx *PreContext) Form(form any) *PreContext {
+	pctx.form = form
+	return pctx
+}
+
+func (pctx PreContext) Start() (*AppContext, *gin.Context, *HTTPResponse) {
+	if pctx.uri != nil {
+		if err := pctx.ginCtx.ShouldBindUri(pctx.uri); err != nil {
+			return nil, nil, langext.Ptr(APIError(pctx.ginCtx, commonApiErr.BindFailURI, "Failed to read uri", err))
+		}
+	}
+
+	if pctx.query != nil {
+		if err := pctx.ginCtx.ShouldBindQuery(pctx.query); err != nil {
+			return nil, nil, langext.Ptr(APIError(pctx.ginCtx, commonApiErr.BindFailQuery, "Failed to read query", err))
+		}
+	}
+
+	if pctx.body != nil {
+		if pctx.ginCtx.ContentType() == "application/json" {
+			if err := pctx.ginCtx.ShouldBindJSON(pctx.body); err != nil {
+				return nil, nil, langext.Ptr(APIError(pctx.ginCtx, commonApiErr.BindFailJSON, "Failed to read body", err))
+			}
+		} else {
+			return nil, nil, langext.Ptr(APIError(pctx.ginCtx, commonApiErr.BindFailJSON, "missing JSON body", nil))
+		}
+	}
+
+	if pctx.form != nil {
+		if pctx.ginCtx.ContentType() == "multipart/form-data" {
+			if err := pctx.ginCtx.ShouldBindWith(pctx.form, binding.Form); err != nil {
+				return nil, nil, langext.Ptr(APIError(pctx.ginCtx, commonApiErr.BindFailFormData, "Failed to read multipart-form", err))
+			}
+		} else {
+			return nil, nil, langext.Ptr(APIError(pctx.ginCtx, commonApiErr.BindFailJSON, "missing form body", nil))
+		}
+	}
+
+	ictx, cancel := context.WithTimeout(context.Background(), pctx.wrapper.requestTimeout)
+	actx := CreateAppContext(pctx.ginCtx, ictx, cancel)
+
+	return actx, pctx.ginCtx, nil
+}
+
+func callPanicSafe(fn WHandlerFunc, pctx PreContext) (res HTTPResponse, stackTrace string, panicObj any) {
+	defer func() {
+		if rec := recover(); rec != nil {
+			res = nil
+			stackTrace = string(debug.Stack())
+			panicObj = rec
+		}
+	}()
+
+	res = fn(pctx)
+	return res, "", nil
+}

ginext/response.go

@@ -0,0 +1,153 @@
+package ginext
+
+import (
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"github.com/rs/zerolog/log"
+	json "gogs.mikescher.com/BlackForestBytes/goext/gojson"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"runtime/debug"
+	"strings"
+)
+
+type HTTPResponse interface {
+	Write(g *gin.Context)
+}
+
+type jsonHTTPResponse struct {
+	statusCode int
+	data       any
+}
+
+func (j jsonHTTPResponse) Write(g *gin.Context) {
+	g.Render(j.statusCode, json.GoJsonRender{Data: j.data, NilSafeSlices: true, NilSafeMaps: true})
+}
+
+type emptyHTTPResponse struct {
+	statusCode int
+}
+
+func (j emptyHTTPResponse) Write(g *gin.Context) {
+	g.Status(j.statusCode)
+}
+
+type textHTTPResponse struct {
+	statusCode int
+	data       string
+}
+
+func (j textHTTPResponse) Write(g *gin.Context) {
+	g.String(j.statusCode, "%s", j.data)
+}
+
+type dataHTTPResponse struct {
+	statusCode  int
+	data        []byte
+	contentType string
+}
+
+func (j dataHTTPResponse) Write(g *gin.Context) {
+	g.Data(j.statusCode, j.contentType, j.data)
+}
+
+type fileHTTPResponse struct {
+	mimetype string
+	filepath string
+	filename *string
+}
+
+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))
+
+	}
+	g.File(j.filepath)
+}
+
+type redirectHTTPResponse struct {
+	statusCode int
+	url        string
+}
+
+func (j redirectHTTPResponse) Write(g *gin.Context) {
+	g.Redirect(j.statusCode, j.url)
+}
+
+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 Redirect(sc int, newURL string) HTTPResponse {
+	return &redirectHTTPResponse{statusCode: sc, url: newURL}
+}
+
+func APIError(g *gin.Context, errcode commonApiErr.APIErrorCode, msg string, e error) HTTPResponse {
+	return createApiError(g, errcode, msg, e)
+}
+
+func NotImplemented(g *gin.Context) HTTPResponse {
+	return createApiError(g, commonApiErr.NotImplemented, "", nil)
+}
+
+func createApiError(g *gin.Context, errcode commonApiErr.APIErrorCode, msg string, e error) HTTPResponse {
+	reqUri := ""
+	if g != nil && g.Request != nil {
+		reqUri = g.Request.Method + " :: " + g.Request.RequestURI
+	}
+
+	log.Error().
+		Str("errorcode.key", errcode.Key).
+		Int("errcode.status", errcode.HTTPStatusCode).
+		Str("uri", reqUri).
+		AnErr("err", e).
+		Stack().
+		Msg(msg)
+
+	var fapiMessage *string = nil
+	if v, ok := e.(interface{ FAPIMessage() string }); ok {
+		fapiMessage = langext.Ptr(v.FAPIMessage())
+	}
+
+	if g.GetBool("__returnRawErrors") {
+		return &jsonHTTPResponse{
+			statusCode: errcode.HTTPStatusCode,
+			data: extAPIError{
+				ErrorCode:        errcode.Key,
+				Message:          msg,
+				RawError:         langext.Ptr(langext.Conditional(e == nil, "", fmt.Sprintf("%+v", e))),
+				FAPIErrorMessage: fapiMessage,
+				Trace:            strings.Split(string(debug.Stack()), "\n"),
+			},
+		}
+	} else {
+		return &jsonHTTPResponse{
+			statusCode: errcode.HTTPStatusCode,
+			data: apiError{
+				ErrorCode:        errcode.Key,
+				Message:          msg,
+				FAPIErrorMessage: fapiMessage,
+			},
+		}
+	}
+}

ginext/routes.go

@@ -0,0 +1,85 @@
+package ginext
+
+import (
+	"github.com/gin-gonic/gin"
+	"net/http"
+)
+
+var anyMethods = []string{
+	http.MethodGet, http.MethodPost, http.MethodPut, http.MethodPatch,
+	http.MethodHead, http.MethodOptions, http.MethodDelete, http.MethodConnect,
+	http.MethodTrace,
+}
+
+type GinRoutesWrapper struct {
+	wrapper *GinWrapper
+	routes  gin.IRouter
+}
+
+type GinRouteBuilder struct {
+	routes *GinRoutesWrapper
+
+	methods  []string
+	relPath  string
+	handlers []gin.HandlerFunc
+}
+
+func (w *GinWrapper) Routes() *GinRoutesWrapper {
+	return &GinRoutesWrapper{wrapper: w, routes: w.engine}
+}
+
+func (w *GinRoutesWrapper) Group(relativePath string) *GinRoutesWrapper {
+	return &GinRoutesWrapper{wrapper: w.wrapper, routes: w.routes.Group(relativePath)}
+}
+
+func (w *GinRoutesWrapper) GET(relativePath string) *GinRouteBuilder {
+	return &GinRouteBuilder{routes: w, methods: []string{http.MethodGet}, relPath: relativePath, handlers: make([]gin.HandlerFunc, 0)}
+}
+
+func (w *GinRoutesWrapper) POST(relativePath string) *GinRouteBuilder {
+	return &GinRouteBuilder{routes: w, methods: []string{http.MethodPost}, relPath: relativePath, handlers: make([]gin.HandlerFunc, 0)}
+}
+
+func (w *GinRoutesWrapper) DELETE(relativePath string) *GinRouteBuilder {
+	return &GinRouteBuilder{routes: w, methods: []string{http.MethodDelete}, relPath: relativePath, handlers: make([]gin.HandlerFunc, 0)}
+}
+
+func (w *GinRoutesWrapper) PATCH(relativePath string) *GinRouteBuilder {
+	return &GinRouteBuilder{routes: w, methods: []string{http.MethodPatch}, relPath: relativePath, handlers: make([]gin.HandlerFunc, 0)}
+}
+
+func (w *GinRoutesWrapper) PUT(relativePath string) *GinRouteBuilder {
+	return &GinRouteBuilder{routes: w, methods: []string{http.MethodPut}, relPath: relativePath, handlers: make([]gin.HandlerFunc, 0)}
+}
+
+func (w *GinRoutesWrapper) OPTIONS(relativePath string) *GinRouteBuilder {
+	return &GinRouteBuilder{routes: w, methods: []string{http.MethodOptions}, relPath: relativePath, handlers: make([]gin.HandlerFunc, 0)}
+}
+
+func (w *GinRoutesWrapper) HEAD(relativePath string) *GinRouteBuilder {
+	return &GinRouteBuilder{routes: w, methods: []string{http.MethodHead}, relPath: relativePath, handlers: make([]gin.HandlerFunc, 0)}
+}
+
+func (w *GinRoutesWrapper) COUNT(relativePath string) *GinRouteBuilder {
+	return &GinRouteBuilder{routes: w, methods: []string{"COUNT"}, relPath: relativePath, handlers: make([]gin.HandlerFunc, 0)}
+}
+
+func (w *GinRoutesWrapper) Any(relativePath string) *GinRouteBuilder {
+	return &GinRouteBuilder{routes: w, methods: anyMethods, relPath: relativePath, handlers: make([]gin.HandlerFunc, 0)}
+}
+
+func (w *GinRouteBuilder) Use(middleware ...gin.HandlerFunc) *GinRouteBuilder {
+	w.handlers = append(w.handlers, middleware...)
+	return w
+}
+
+func (w *GinRouteBuilder) Handle(handler WHandlerFunc) {
+	w.handlers = append(w.handlers, Wrap(w.routes.wrapper, handler))
+	for _, m := range w.methods {
+		w.routes.routes.Handle(m, w.relPath, w.handlers...)
+	}
+}
+
+func (w *GinWrapper) NoRoute(handler WHandlerFunc) {
+	w.engine.NoRoute(Wrap(w, handler))
+}

go.mod

@@ -3,22 +3,47 @@ module gogs.mikescher.com/BlackForestBytes/goext
 go 1.19
 
 require (
+	github.com/gin-gonic/gin v1.9.1
 	github.com/jmoiron/sqlx v1.3.5
-	go.mongodb.org/mongo-driver v1.11.1
-	golang.org/x/crypto v0.4.0
-	golang.org/x/sys v0.3.0
-	golang.org/x/term v0.3.0
+	github.com/rs/zerolog v1.29.1
+	go.mongodb.org/mongo-driver v1.12.0
+	golang.org/x/crypto v0.11.0
+	golang.org/x/sys v0.10.0
+	golang.org/x/term v0.10.0
 )
 
 require (
-	github.com/golang/snappy v0.0.1 // indirect
-	github.com/klauspost/compress v1.13.6 // indirect
-	github.com/montanaflynn/stats v0.0.0-20171201202039-1bf9dbcd8cbe // indirect
+	github.com/bytedance/sonic v1.10.0-rc2 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20230717121745-296ad89f973d // indirect
+	github.com/chenzhuoyu/iasm v0.9.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.2 // 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 v10.14.1 // indirect
+	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/compress v1.16.7 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.5 // indirect
+	github.com/leodido/go-urn v1.2.4 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.19 // 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 v2.0.9 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.11 // indirect
 	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
-	github.com/xdg-go/scram v1.1.1 // indirect
-	github.com/xdg-go/stringprep v1.0.3 // indirect
-	github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d // indirect
-	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
-	golang.org/x/text v0.5.0 // 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
+	golang.org/x/arch v0.4.0 // indirect
+	golang.org/x/net v0.12.0 // indirect
+	golang.org/x/sync v0.3.0 // indirect
+	golang.org/x/text v0.11.0 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,69 +1,240 @@
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 github.com/xdg-go/stringprep v1.0.3 h1:kdwGpVNwPFtjs98xCGkHjQtGKh86rDcRZN17QEMCOIs=
 github.com/xdg-go/stringprep v1.0.3/go.mod h1:W3f5j4i+9rC0kuIEJL0ky1VpHXQU3ocBgklLGvcBnW8=
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 github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d h1:splanxYIlg+5LfHAM6xpdFEAYOk8iySO56hMFq6uLyA=
 github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d/go.mod h1:rHwXgn7JulP+udvsHwJoVG1YGAP6VLg4y9I5dyZdqmA=
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 go.mongodb.org/mongo-driver v1.11.1 h1:QP0znIRTuL0jf1oBQoAoM0C6ZJfBK4kx0Uumtv1A7w8=
 go.mongodb.org/mongo-driver v1.11.1/go.mod h1:s7p5vEtfbeR1gYi6pnj3c3/urpbLv2T5Sfd6Rp2HBB8=
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 golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.4.0 h1:UVQgzMY87xqpKNgb+kDsll2Igd33HszWHFLmpaRMq/8=
 golang.org/x/crypto v0.4.0/go.mod h1:3quD/ATkf6oY+rnes5c3ExXTbLc8mueNue5/DoinL80=
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 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
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 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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 golang.org/x/sys v0.3.0 h1:w8ZOecv6NaNa/zC8944JTU3vz4u6Lagfk4RPQxv92NQ=
 golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
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 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
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 golang.org/x/term v0.3.0 h1:qoo4akIqOcDME5bhc/NgxUdovd6BSS2uMsVjB56q1xI=
 golang.org/x/term v0.3.0/go.mod h1:q750SLmJuPmVoN1blW3UFBPREJfb1KmY3vwxfr+nFDA=
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 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
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 golang.org/x/text v0.5.0 h1:OLmvp0KP+FVG99Ct/qFiL/Fhk4zp4QQnZ7b2U+5piUM=
 golang.org/x/text v0.5.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
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 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
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 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=
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 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/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=
+nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
+rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=

goextVersion.go

@@ -0,0 +1,5 @@
+package goext
+
+const GoextVersion = "0.0.178"
+
+const GoextVersionTimestamp = "2023-07-19T11:20:35+0200"

mongoext/registry.go

@@ -16,6 +16,9 @@ func CreateGoExtBsonRegistry() *bsoncodec.Registry {
 	rb.RegisterTypeDecoder(reflect.TypeOf(rfctime.RFC3339NanoTime{}), rfctime.RFC3339NanoTime{})
 	rb.RegisterTypeDecoder(reflect.TypeOf(&rfctime.RFC3339NanoTime{}), rfctime.RFC3339NanoTime{})
 
+	rb.RegisterTypeDecoder(reflect.TypeOf(rfctime.Date{}), rfctime.Date{})
+	rb.RegisterTypeDecoder(reflect.TypeOf(&rfctime.Date{}), rfctime.Date{})
+
 	bsoncodec.DefaultValueEncoders{}.RegisterDefaultEncoders(rb)
 	bsoncodec.DefaultValueDecoders{}.RegisterDefaultDecoders(rb)
 

reflectext/casting.go

@@ -1,4 +1,4 @@
-package langext
+package reflectext
 
 import (
 	"reflect"

reflectext/primStrSer.go

@@ -0,0 +1,136 @@
+package reflectext
+
+import (
+	"errors"
+	"fmt"
+	"go.mongodb.org/mongo-driver/bson/primitive"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"reflect"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var primitiveSerializer = map[reflect.Type]genSerializer{
+
+	reflect.TypeOf(""): newGenSerializer(serStringToString, serStringToString),
+
+	reflect.TypeOf(int(0)):   newGenSerializer(serIntNumToString[int], serStringToSIntNum[int]),
+	reflect.TypeOf(int32(0)): newGenSerializer(serIntNumToString[int32], serStringToSIntNum[int32]),
+	reflect.TypeOf(int64(0)): newGenSerializer(serIntNumToString[int64], serStringToSIntNum[int64]),
+
+	reflect.TypeOf(uint(0)):   newGenSerializer(serIntNumToString[uint], serStringToUIntNum[uint]),
+	reflect.TypeOf(uint32(0)): newGenSerializer(serIntNumToString[uint32], serStringToUIntNum[uint32]),
+	reflect.TypeOf(uint64(0)): newGenSerializer(serIntNumToString[uint64], serStringToUIntNum[uint64]),
+
+	reflect.TypeOf(float32(0)): newGenSerializer(serFloatNumToString[float32], serStringToFloatNum[float32]),
+	reflect.TypeOf(float64(0)): newGenSerializer(serFloatNumToString[float64], serStringToFloatNum[float64]),
+
+	reflect.TypeOf(true): newGenSerializer(serBoolToString, serStringToBool),
+
+	reflect.TypeOf(primitive.ObjectID{}): newGenSerializer(serObjectIDToString, serStringToObjectID),
+
+	reflect.TypeOf(time.Time{}): newGenSerializer(serTimeToString, serStringToTime),
+}
+
+type genSerializer struct {
+	ToString   func(v any) (string, error)
+	FromString func(v string) (any, error)
+}
+
+func newGenSerializer[TData any](tostr func(v TData) (string, error), fromstr func(v string) (TData, error)) genSerializer {
+	return genSerializer{
+		ToString: func(v any) (string, error) {
+			if tdv, ok := v.(TData); ok {
+				rv, err := tostr(tdv)
+				if err != nil {
+					return "", err
+				}
+				return rv, nil
+			} else {
+				return "", errors.New(fmt.Sprintf("cannot convert type %T to TData (%T)", v, *new(TData)))
+			}
+		},
+		FromString: func(v string) (any, error) {
+			nv, err := fromstr(v)
+			if err != nil {
+				return "", err
+			}
+			return nv, nil
+		},
+	}
+}
+
+func serStringToString(v string) (string, error) {
+	return v, nil
+}
+
+func serIntNumToString[TNum langext.IntegerConstraint](v TNum) (string, error) {
+	return strconv.FormatInt(int64(v), 10), nil
+}
+
+func serStringToSIntNum[TNum langext.SignedConstraint](v string) (TNum, error) {
+	r, err := strconv.ParseInt(v, 10, 64)
+	if err != nil {
+		return 0, err
+	}
+	return TNum(r), nil
+}
+
+func serStringToUIntNum[TNum langext.UnsignedConstraint](v string) (TNum, error) {
+	r, err := strconv.ParseUint(v, 10, 64)
+	if err != nil {
+		return 0, err
+	}
+	return TNum(r), nil
+}
+
+func serFloatNumToString[TNum langext.FloatConstraint](v TNum) (string, error) {
+	return strconv.FormatFloat(float64(v), 'f', -1, 64), nil
+}
+
+func serStringToFloatNum[TNum langext.FloatConstraint](v string) (TNum, error) {
+	r, err := strconv.ParseFloat(v, 64)
+	if err != nil {
+		return 0, err
+	}
+	return TNum(r), nil
+}
+
+func serBoolToString(v bool) (string, error) {
+	return langext.Conditional(v, "true", "false"), nil
+}
+
+func serStringToBool(v string) (bool, error) {
+	if strings.ToLower(v) == "true" {
+		return true, nil
+	}
+	if strings.ToLower(v) == "false" {
+		return true, nil
+	}
+	return false, errors.New(fmt.Sprintf("invalid boolean value '%s'", v))
+}
+
+func serObjectIDToString(v primitive.ObjectID) (string, error) {
+	return v.Hex(), nil
+}
+
+func serStringToObjectID(v string) (primitive.ObjectID, error) {
+	if rv, err := primitive.ObjectIDFromHex(v); err == nil {
+		return rv, nil
+	} else {
+		return primitive.ObjectID{}, err
+	}
+}
+
+func serTimeToString(v time.Time) (string, error) {
+	return v.Format(time.RFC3339Nano), nil
+}
+
+func serStringToTime(v string) (time.Time, error) {
+	if rv, err := time.Parse(time.RFC3339Nano, v); err == nil {
+		return rv, nil
+	} else {
+		return time.Time{}, err
+	}
+}

reflectext/primitiveStringSerializer.go

@@ -0,0 +1,92 @@
+package reflectext
+
+import (
+	"errors"
+	"fmt"
+	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"reflect"
+)
+
+// PrimitiveStringSerializer is used to serialize primitive types (and a few more) from and to string
+// This is not really intended to be user facing, and more as a simple building block for other mechanisms
+// supports:
+//   - golang primitives (ints, uints, floats, bool, string)
+//   - type aliases
+//   - time.Time
+//   - primitive.ObjectID
+type PrimitiveStringSerializer struct{}
+
+func (pss PrimitiveStringSerializer) ValueToString(v any) (string, error) {
+
+	inType := reflect.TypeOf(v)
+
+	if inType.Kind() == reflect.Ptr && langext.IsNil(v) {
+		return "", nil
+	}
+
+	if inType.Kind() == reflect.Ptr {
+		rval1 := reflect.ValueOf(v)
+		rval2 := rval1.Elem()
+		rval3 := rval2.Interface()
+		return pss.ValueToString(rval3)
+	}
+
+	if conv, ok := primitiveSerializer[inType]; ok {
+		return conv.ToString(v)
+	}
+
+	for convType, conv := range primitiveSerializer {
+		if castV, ok := TryCastType(v, convType); ok {
+			return conv.ToString(castV)
+		}
+	}
+
+	return "", errors.New(fmt.Sprintf("failed to find a matching generic <toString> conversion fo type %T", v))
+}
+
+func (pss PrimitiveStringSerializer) ValueFromString(str string, outType reflect.Type) (any, error) {
+
+	if outType.Kind() == reflect.Ptr && str == "" {
+		return reflect.Zero(outType).Interface(), nil // = nil.(outType), nil
+	}
+
+	if str == "" {
+		return reflect.Zero(outType).Interface(), nil // = <default>(outType), nil
+	}
+
+	if outType.Kind() == reflect.Ptr {
+
+		innerValue, err := pss.ValueFromString(str, outType.Elem())
+		if err != nil {
+			return nil, err
+		}
+
+		// this weird piece of shit converts innerValue to &innerValue  (while keeping types)
+
+		rval1 := reflect.ValueOf(innerValue)
+		rval2 := rval1.Convert(outType.Elem())
+		rval3 := reflect.New(outType.Elem())
+		rval3.Elem().Set(rval2)
+		rval4 := rval3.Interface()
+
+		return rval4, nil
+	}
+
+	if conv, ok := primitiveSerializer[outType]; ok {
+		return conv.FromString(str)
+	}
+
+	emptyResultVal := reflect.Zero(outType).Interface()
+
+	for convType, conv := range primitiveSerializer {
+		if _, ok := TryCastType(emptyResultVal, convType); ok {
+			if convVal, err := conv.FromString(str); err == nil {
+				if resVal, ok := TryCastType(convVal, outType); ok {
+					return resVal, nil
+				}
+			}
+		}
+	}
+
+	return "", errors.New(fmt.Sprintf("failed to find a matching generic <toString> conversion fo type %s", outType.String()))
+}

rfctime/date.go

@@ -0,0 +1,240 @@
+package rfctime
+
+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"
+	"time"
+)
+
+type Date struct {
+	Year  int
+	Month int
+	Day   int
+}
+
+func (t Date) Time(loc *time.Location) time.Time {
+	return time.Date(t.Year, time.Month(t.Month), t.Day, 0, 0, 0, 0, loc)
+}
+
+func (t Date) TimeUTC() time.Time {
+	return time.Date(t.Year, time.Month(t.Month), t.Day, 0, 0, 0, 0, time.UTC)
+}
+
+func (t Date) TimeLocal() time.Time {
+	return time.Date(t.Year, time.Month(t.Month), t.Day, 0, 0, 0, 0, time.Local)
+}
+
+func (t Date) MarshalBinary() ([]byte, error) {
+	return t.TimeUTC().MarshalBinary()
+}
+
+func (t *Date) UnmarshalBinary(data []byte) error {
+	nt := time.Time{}
+	if err := nt.UnmarshalBinary(data); err != nil {
+		return err
+	}
+	t.Year = nt.Year()
+	t.Month = int(nt.Month())
+	t.Day = nt.Day()
+	return nil
+}
+
+func (t Date) GobEncode() ([]byte, error) {
+	return t.TimeUTC().GobEncode()
+}
+
+func (t *Date) GobDecode(data []byte) error {
+	nt := time.Time{}
+	if err := nt.GobDecode(data); err != nil {
+		return err
+	}
+	t.Year = nt.Year()
+	t.Month = int(nt.Month())
+	t.Day = nt.Day()
+	return nil
+}
+
+func (t *Date) UnmarshalJSON(data []byte) error {
+	str := ""
+	if err := json.Unmarshal(data, &str); err != nil {
+		return err
+	}
+	t0, err := time.Parse(t.FormatStr(), 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())
+	return json.Marshal(str)
+}
+
+func (t Date) MarshalText() ([]byte, error) {
+	b := make([]byte, 0, len(t.FormatStr()))
+	return t.TimeUTC().AppendFormat(b, t.FormatStr()), nil
+}
+
+func (t *Date) UnmarshalText(data []byte) error {
+	var err error
+	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 {
+	if bt == bsontype.Null {
+		// 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
+		*t = Date{}
+		return nil
+	}
+	if bt != bsontype.String {
+		return errors.New(fmt.Sprintf("cannot unmarshal %v into Date", bt))
+	}
+
+	var tt string
+	err := bson.RawValue{Type: bt, Value: data}.Unmarshal(&tt)
+	if err != nil {
+		return err
+	}
+
+	v, err := time.Parse(t.FormatStr(), tt)
+	if err != nil {
+		return err
+	}
+	t.Year = v.Year()
+	t.Month = int(v.Month())
+	t.Day = v.Day()
+
+	return nil
+}
+
+func (t Date) MarshalBSONValue() (bsontype.Type, []byte, error) {
+	return bson.MarshalValue(t.TimeUTC().Format(t.FormatStr()))
+}
+
+func (t Date) 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 = t.UnmarshalBSONValue(tp, src)
+	if err != nil {
+		return err
+	}
+
+	if val.Kind() == reflect.Ptr {
+		val.Set(reflect.ValueOf(&t))
+	} else {
+		val.Set(reflect.ValueOf(t))
+	}
+
+	return nil
+}
+
+func (t Date) Serialize() string {
+	return t.TimeUTC().Format(t.FormatStr())
+}
+
+func (t Date) FormatStr() string {
+	return "2006-01-02"
+}
+
+func (t Date) Date() (year int, month time.Month, day int) {
+	return t.TimeUTC().Date()
+}
+
+func (t Date) Weekday() time.Weekday {
+	return t.TimeUTC().Weekday()
+}
+
+func (t Date) ISOWeek() (year, week int) {
+	return t.TimeUTC().ISOWeek()
+}
+
+func (t Date) YearDay() int {
+	return t.TimeUTC().YearDay()
+}
+
+func (t Date) AddDate(years int, months int, days int) Date {
+	return NewDate(t.TimeUTC().AddDate(years, months, days))
+}
+
+func (t Date) Unix() int64 {
+	return t.TimeUTC().Unix()
+}
+
+func (t Date) UnixMilli() int64 {
+	return t.TimeUTC().UnixMilli()
+}
+
+func (t Date) UnixMicro() int64 {
+	return t.TimeUTC().UnixMicro()
+}
+
+func (t Date) UnixNano() int64 {
+	return t.TimeUTC().UnixNano()
+}
+
+func (t Date) Format(layout string) string {
+	return t.TimeUTC().Format(layout)
+}
+
+func (t Date) GoString() string {
+	return t.TimeUTC().GoString()
+}
+
+func (t Date) String() string {
+	return t.TimeUTC().String()
+}
+
+func NewDate(t time.Time) Date {
+	return Date{
+		Year:  t.Year(),
+		Month: int(t.Month()),
+		Day:   t.Day(),
+	}
+}
+
+func NowDate(loc *time.Location) Date {
+	return NewDate(time.Now().In(loc))
+}
+
+func NowDateLoc() Date {
+	return NewDate(time.Now().In(time.UTC))
+}
+
+func NowDateUTC() Date {
+	return NewDate(time.Now().In(time.Local))
+}

tst/assertions.go

@@ -2,6 +2,7 @@ package tst
 
 import (
 	"encoding/hex"
+	"runtime/debug"
 	"testing"
 )
 
@@ -54,12 +55,18 @@ func AssertHexEqual(t *testing.T, expected string, actual []byte) {
 
 func AssertTrue(t *testing.T, value bool) {
 	if !value {
-		t.Error("value should be true")
+		t.Error("value should be true\n" + string(debug.Stack()))
 	}
 }
 
 func AssertFalse(t *testing.T, value bool) {
 	if value {
-		t.Error("value should be false")
+		t.Error("value should be false\n" + string(debug.Stack()))
+	}
+}
+
+func AssertNoErr(t *testing.T, anerr error) {
+	if anerr != nil {
+		t.Error("Function returned an error: " + anerr.Error() + "\n" + string(debug.Stack()))
 	}
 }

wmo/collection.go

@@ -2,17 +2,35 @@ package wmo
 
 import (
 	"context"
+	"go.mongodb.org/mongo-driver/bson/bsontype"
 	"go.mongodb.org/mongo-driver/mongo"
 	ct "gogs.mikescher.com/BlackForestBytes/goext/cursortoken"
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
 	"reflect"
 )
 
-type EntityID = any
+type EntityID interface {
+	MarshalBSONValue() (bsontype.Type, []byte, error)
+	String() string
+}
 
-type fullTypeRef[TData any] struct {
+type Decodable interface {
+	Decode(v any) error
+}
+
+type Cursorable interface {
+	Decode(v any) error
+	Err() error
+	Close(ctx context.Context) error
+	All(ctx context.Context, results any) error
+	RemainingBatchLength() int
+	Next(ctx context.Context) bool
+}
+
+type fullTypeRef struct {
 	IsPointer      bool
 	Kind           reflect.Kind
+	RealType       reflect.Type
 	Type           reflect.Type
 	UnderlyingType reflect.Type
 	Name           string
@@ -20,8 +38,11 @@ type fullTypeRef[TData any] struct {
 }
 
 type Coll[TData any] struct {
-	coll        *mongo.Collection
-	dataTypeMap map[string]fullTypeRef[TData]
+	coll                *mongo.Collection                                        // internal mongo collection, access via Collection()
+	dataTypeMap         map[string]fullTypeRef                                   // list of TData fields (only if TData is not an interface)
+	implDataTypeMap     map[reflect.Type]map[string]fullTypeRef                  // dynamic list of fields of TData implementations (only if TData is an interface)
+	customDecoder       *func(ctx context.Context, dec Decodable) (TData, error) // custom decoding function (useful if TData is an interface)
+	isInterfaceDataType bool                                                     // true if TData is an interface (not a struct)
 }
 
 func (c *Coll[TData]) Collection() *mongo.Collection {
@@ -32,6 +53,14 @@ func (c *Coll[TData]) Name() string {
 	return c.coll.Name()
 }
 
+func (c *Coll[TData]) WithDecodeFunc(cdf func(ctx context.Context, dec Decodable) (TData, error), example TData) *Coll[TData] {
+
+	c.EnsureInitializedReflection(example)
+
+	c.customDecoder = langext.Ptr(cdf)
+	return c
+}
+
 func (c *Coll[TData]) Indexes() mongo.IndexView {
 	return c.coll.Indexes()
 }

wmo/decoding.go

@@ -0,0 +1,54 @@
+package wmo
+
+import (
+	"context"
+)
+
+func (c *Coll[TData]) decodeSingle(ctx context.Context, dec Decodable) (TData, error) {
+	if c.customDecoder != nil {
+
+		return (*c.customDecoder)(ctx, dec)
+
+	} else {
+
+		var res TData
+
+		err := dec.Decode(&res)
+		if err != nil {
+			return *new(TData), err
+		}
+
+		return res, nil
+
+	}
+}
+
+func (c *Coll[TData]) decodeAll(ctx context.Context, cursor Cursorable) ([]TData, error) {
+	if c.customDecoder != nil {
+
+		res := make([]TData, 0, cursor.RemainingBatchLength())
+
+		for cursor.Next(ctx) {
+			entry, err := (*c.customDecoder)(ctx, cursor)
+			if err != nil {
+				return nil, err
+			}
+			res = append(res, entry)
+		}
+
+		return res, nil
+
+	} else {
+
+		res := make([]TData, 0, cursor.RemainingBatchLength())
+
+		err := cursor.All(ctx, &res)
+		if err != nil {
+			return nil, err
+		}
+
+		return res, nil
+
+	}
+
+}

wmo/pagination.go

@@ -1,6 +1,7 @@
 package wmo
 
 import (
+	"errors"
 	"go.mongodb.org/mongo-driver/bson"
 	ct "gogs.mikescher.com/BlackForestBytes/goext/cursortoken"
 )
@@ -57,7 +58,24 @@ func CreatePagination[TData any](coll *Coll[TData], token ct.CursorToken, fieldP
 
 	pipeline := make([]bson.D, 0, 3)
 
-	pipeline = append(pipeline, bson.D{{Key: "$match", Value: bson.M{"$or": cond}}})
+	if token.Mode == ct.CTMStart {
+
+		// no gt/lt condition
+
+	} else if token.Mode == ct.CTMNormal {
+
+		pipeline = append(pipeline, bson.D{{Key: "$match", Value: bson.M{"$or": cond}}})
+
+	} else if token.Mode == ct.CTMEnd {
+
+		// false
+		pipeline = append(pipeline, bson.D{{Key: "$match", Value: bson.M{"$expr": bson.M{"$eq": bson.A{"1", "0"}}}}})
+
+	} else {
+
+		return nil, errors.New("unknown ct mode: " + string(token.Mode))
+
+	}
 
 	pipeline = append(pipeline, bson.D{{Key: "$sort", Value: sort}})
 

wmo/queryAggregate.go

@@ -2,6 +2,7 @@ package wmo
 
 import (
 	"context"
+	"errors"
 	"go.mongodb.org/mongo-driver/mongo"
 	"go.mongodb.org/mongo-driver/mongo/options"
 )
@@ -12,11 +13,44 @@ func (c *Coll[TData]) Aggregate(ctx context.Context, pipeline mongo.Pipeline, op
 		return nil, err
 	}
 
-	res := make([]TData, 0, cursor.RemainingBatchLength())
-	err = cursor.All(ctx, &res)
+	res, err := c.decodeAll(ctx, cursor)
 	if err != nil {
 		return nil, err
 	}
 
 	return res, nil
 }
+
+func (c *Coll[TData]) AggregateOneOpt(ctx context.Context, pipeline mongo.Pipeline, opts ...*options.AggregateOptions) (*TData, error) {
+	cursor, err := c.coll.Aggregate(ctx, pipeline, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	if cursor.Next(ctx) {
+		v, err := c.decodeSingle(ctx, cursor)
+		if err != nil {
+			return nil, err
+		}
+		return &v, nil
+	}
+
+	return nil, nil
+}
+
+func (c *Coll[TData]) AggregateOne(ctx context.Context, pipeline mongo.Pipeline, opts ...*options.AggregateOptions) (TData, error) {
+	cursor, err := c.coll.Aggregate(ctx, pipeline, opts...)
+	if err != nil {
+		return *new(TData), err
+	}
+
+	if cursor.Next(ctx) {
+		v, err := c.decodeSingle(ctx, cursor)
+		if err != nil {
+			return *new(TData), err
+		}
+		return v, nil
+	}
+
+	return *new(TData), errors.New("no document in result")
+}

wmo/queryDelete.go

@@ -1,6 +1,12 @@
 package wmo
 
-func (c *Coll[TData]) DeleteOne(ctx context.Context, id EntityID) error {
+import (
+	"context"
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+)
+
+func (c *Coll[TData]) DeleteOneByID(ctx context.Context, id EntityID) error {
 	_, err := c.coll.DeleteOne(ctx, bson.M{"_id": id})
 	if err != nil {
 		return err
@@ -9,6 +15,15 @@ func (c *Coll[TData]) DeleteOne(ctx context.Context, id EntityID) error {
 	return nil
 }
 
+func (c *Coll[TData]) DeleteOne(ctx context.Context, filterQuery bson.M) error {
+	_, err := c.coll.DeleteOne(ctx, filterQuery)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 func (c *Coll[TData]) DeleteMany(ctx context.Context, filterQuery bson.M) (*mongo.DeleteResult, error) {
 	res, err := c.coll.DeleteMany(ctx, filterQuery)
 	if err != nil {

wmo/queryFind.go

@@ -8,20 +8,15 @@ import (
 )
 
 func (c *Coll[TData]) FindOne(ctx context.Context, filter bson.M) (TData, error) {
-	var res TData
+	mongoRes := c.coll.FindOne(ctx, filter)
 
-	err := c.coll.FindOne(ctx, filter).Decode(&res)
-	if err != nil {
-		return *new(TData), err
-	}
-
-	return res, nil
+	return c.decodeSingle(ctx, mongoRes)
 }
 
 func (c *Coll[TData]) FindOneOpt(ctx context.Context, filter bson.M) (*TData, error) {
-	var res TData
+	mongoRes := c.coll.FindOne(ctx, filter)
 
-	err := c.coll.FindOne(ctx, filter).Decode(&res)
+	res, err := c.decodeSingle(ctx, mongoRes)
 	if err == mongo.ErrNoDocuments {
 		return nil, nil
 	}
@@ -33,20 +28,15 @@ func (c *Coll[TData]) FindOneOpt(ctx context.Context, filter bson.M) (*TData, er
 }
 
 func (c *Coll[TData]) FindOneByID(ctx context.Context, id EntityID) (TData, error) {
-	var res TData
+	mongoRes := c.coll.FindOne(ctx, bson.M{"_id": id})
 
-	err := c.coll.FindOne(ctx, bson.M{"_id": id}).Decode(&res)
-	if err != nil {
-		return *new(TData), err
-	}
-
-	return res, nil
+	return c.decodeSingle(ctx, mongoRes)
 }
 
 func (c *Coll[TData]) FindOneOptByID(ctx context.Context, id EntityID) (*TData, error) {
-	var res TData
+	mongoRes := c.coll.FindOne(ctx, bson.M{"_id": id})
 
-	err := c.coll.FindOne(ctx, bson.M{"_id": id}).Decode(&res)
+	res, err := c.decodeSingle(ctx, mongoRes)
 	if err == mongo.ErrNoDocuments {
 		return nil, nil
 	}
@@ -63,8 +53,7 @@ func (c *Coll[TData]) Find(ctx context.Context, filter bson.M, opts ...*options.
 		return nil, err
 	}
 
-	res := make([]TData, 0, cursor.RemainingBatchLength())
-	err = cursor.All(ctx, &res)
+	res, err := c.decodeAll(ctx, cursor)
 	if err != nil {
 		return nil, err
 	}

wmo/queryInsert.go

@@ -11,12 +11,7 @@ func (c *Coll[TData]) InsertOne(ctx context.Context, valueIn TData) (TData, erro
 		return *new(TData), err
 	}
 
-	var res TData
+	mongoRes := c.coll.FindOne(ctx, bson.M{"_id": insRes.InsertedID})
 
-	err = c.coll.FindOne(ctx, bson.M{"_id": insRes.InsertedID}).Decode(&res)
-	if err != nil {
-		return *new(TData), err
-	}
-
-	return res, nil
+	return c.decodeSingle(ctx, mongoRes)
 }

wmo/queryList.go

@@ -3,6 +3,7 @@ package wmo
 import (
 	"context"
 	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
 	ct "gogs.mikescher.com/BlackForestBytes/goext/cursortoken"
 )
 
@@ -11,9 +12,26 @@ func (c *Coll[TData]) List(ctx context.Context, filter ct.Filter, pageSize *int,
 		return make([]TData, 0), ct.End(), nil
 	}
 
-	pipeline := filter.FilterQuery()
+	pipeline := mongo.Pipeline{}
+	pf1 := "_id"
+	pd1 := ct.SortASC
+	pf2 := "_id"
+	pd2 := ct.SortASC
 
-	sortPrimary, sortDirPrimary, sortSecondary, sortDirSecondary := filter.Pagination()
+	if filter != nil {
+		pipeline = filter.FilterQuery()
+		pf1, pd1, pf2, pd2 = filter.Pagination()
+	}
+
+	sortPrimary := pf1
+	sortDirPrimary := pd1
+	sortSecondary := &pf2
+	sortDirSecondary := &pd2
+
+	if pf1 == pf2 {
+		sortSecondary = nil
+		sortDirSecondary = nil
+	}
 
 	paginationPipeline, err := CreatePagination(c, inTok, sortPrimary, sortDirPrimary, sortSecondary, sortDirSecondary, pageSize)
 	if err != nil {
@@ -27,27 +45,45 @@ func (c *Coll[TData]) List(ctx context.Context, filter ct.Filter, pageSize *int,
 		return nil, ct.CursorToken{}, err
 	}
 
-	entities := make([]TData, 0, cursor.RemainingBatchLength()+1)
+	// fast branch
+	if pageSize == nil {
+		entries, err := c.decodeAll(ctx, cursor)
+		if err != nil {
+			return nil, ct.CursorToken{}, err
+		}
+		return entries, ct.End(), nil
+	}
+
+	entities := make([]TData, 0, cursor.RemainingBatchLength())
 	for (pageSize == nil || len(entities) != *pageSize) && cursor.Next(ctx) {
 		var entry TData
-		err = cursor.Decode(&entry)
+		entry, err = c.decodeSingle(ctx, cursor)
 		if err != nil {
 			return nil, ct.CursorToken{}, err
 		}
 		entities = append(entities, entry)
 	}
 
-	if pageSize == nil || len(entities) <= *pageSize || !cursor.TryNext(ctx) {
+	if pageSize == nil || len(entities) < *pageSize || !cursor.TryNext(ctx) {
 		return entities, ct.End(), nil
 	}
 
 	last := entities[len(entities)-1]
 
-	nextToken, _ := c.createToken(sortPrimary, sortDirPrimary, sortSecondary, sortDirSecondary, last, pageSize)
+	c.EnsureInitializedReflection(last)
+
+	nextToken, err := c.createToken(sortPrimary, sortDirPrimary, sortSecondary, sortDirSecondary, last, pageSize)
+	if err != nil {
+		return nil, ct.CursorToken{}, err
+	}
 
 	return entities, nextToken, nil
 }
 
+type countRes struct {
+	Count int64 `bson:"c"`
+}
+
 func (c *Coll[TData]) Count(ctx context.Context, filter ct.Filter) (int64, error) {
 	pipeline := filter.FilterQuery()
 
@@ -58,12 +94,8 @@ func (c *Coll[TData]) Count(ctx context.Context, filter ct.Filter) (int64, error
 		return 0, err
 	}
 
-	type res struct {
-		Count int64 `bson:"c"`
-	}
-
 	if cursor.Next(ctx) {
-		v := res{}
+		v := countRes{}
 		err = cursor.Decode(&v)
 		if err != nil {
 			return 0, err

wmo/queryUpdate.go

@@ -3,18 +3,14 @@ package wmo
 import (
 	"context"
 	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
 	"go.mongodb.org/mongo-driver/mongo/options"
 )
 
 func (c *Coll[TData]) FindOneAndUpdate(ctx context.Context, filterQuery bson.M, updateQuery bson.M) (TData, error) {
-	var res TData
+	mongoRes := c.coll.FindOneAndUpdate(ctx, filterQuery, updateQuery, options.FindOneAndUpdate().SetReturnDocument(options.After))
 
-	err := c.coll.FindOneAndUpdate(ctx, filterQuery, updateQuery, options.FindOneAndUpdate().SetReturnDocument(options.After)).Decode(&res)
-	if err != nil {
-		return *new(TData), err
-	}
-
-	return res, nil
+	return c.decodeSingle(ctx, mongoRes)
 }
 
 func (c *Coll[TData]) UpdateOne(ctx context.Context, filterQuery bson.M, updateQuery bson.M) error {
@@ -35,11 +31,26 @@ func (c *Coll[TData]) UpdateOneByID(ctx context.Context, id EntityID, updateQuer
 	return nil
 }
 
-func (c *Coll[TData]) ReplaceOne(ctx context.Context, id EntityID, value TData) error {
-	_, err := c.coll.UpdateOne(ctx, bson.M{"_id": id}, value)
+func (c *Coll[TData]) UpdateMany(ctx context.Context, filterQuery bson.M, updateQuery bson.M) (*mongo.UpdateResult, error) {
+	res, err := c.coll.UpdateMany(ctx, filterQuery, updateQuery)
+	if err != nil {
+		return nil, err
+	}
+
+	return res, nil
+}
+
+func (c *Coll[TData]) ReplaceOne(ctx context.Context, filterQuery bson.M, value TData) error {
+	_, err := c.coll.UpdateOne(ctx, filterQuery, bson.M{"$set": value})
 	if err != nil {
 		return err
 	}
 
 	return nil
 }
+
+func (c *Coll[TData]) FindOneAndReplace(ctx context.Context, filterQuery bson.M, value TData) (TData, error) {
+	mongoRes := c.coll.FindOneAndUpdate(ctx, filterQuery, bson.M{"$set": value}, options.FindOneAndUpdate().SetReturnDocument(options.After))
+
+	return c.decodeSingle(ctx, mongoRes)
+}

wmo/reflection.go

@@ -2,26 +2,61 @@ package wmo
 
 import (
 	"errors"
-	"fmt"
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"gogs.mikescher.com/BlackForestBytes/goext/reflectext"
 	"reflect"
-	"strconv"
-	"time"
+	"strings"
 )
 
+func (c *Coll[TData]) EnsureInitializedReflection(v TData) {
+
+	if !c.isInterfaceDataType {
+		return // only dynamically load dataTypeMap on interface TData
+	}
+
+	rval := reflect.ValueOf(v)
+	for rval.Type().Kind() == reflect.Pointer {
+		rval = rval.Elem()
+	}
+
+	if _, ok := c.implDataTypeMap[rval.Type()]; ok {
+		return // already loaded
+	}
+
+	m := make(map[string]fullTypeRef)
+
+	c.initFields("", rval, m, make([]int, 0))
+
+	c.implDataTypeMap[rval.Type()] = m
+}
+
 func (c *Coll[TData]) init() {
 
-	c.dataTypeMap = make(map[string]fullTypeRef[TData])
-
 	example := *new(TData)
 
-	v := reflect.ValueOf(example)
+	datatype := reflect.TypeOf(&example).Elem()
 
-	c.initFields("", v, make([]int, 0))
+	if datatype.Kind() == reflect.Interface {
+
+		c.isInterfaceDataType = true
+
+		c.dataTypeMap = make(map[string]fullTypeRef)
+		c.implDataTypeMap = make(map[reflect.Type]map[string]fullTypeRef)
+	} else {
+
+		c.isInterfaceDataType = false
+
+		c.dataTypeMap = make(map[string]fullTypeRef)
+		c.implDataTypeMap = make(map[reflect.Type]map[string]fullTypeRef)
+
+		v := reflect.ValueOf(example)
+		c.initFields("", v, c.dataTypeMap, make([]int, 0))
+
+	}
 
 }
 
-func (c *Coll[TData]) initFields(prefix string, rval reflect.Value, idxarr []int) {
+func (c *Coll[TData]) initFields(prefix string, rval reflect.Value, m map[string]fullTypeRef, idxarr []int) {
 
 	rtyp := rval.Type()
 
@@ -34,42 +69,65 @@ func (c *Coll[TData]) initFields(prefix string, rval reflect.Value, idxarr []int
 			continue
 		}
 
+		bsontags := make([]string, 0)
 		bsonkey, found := rsfield.Tag.Lookup("bson")
-		if !found || bsonkey == "-" {
+		if !found {
 			continue
 		}
+		if strings.Contains(bsonkey, ",") {
+			bsontags = strings.Split(bsonkey[strings.Index(bsonkey, ",")+1:], ",")
+			bsonkey = bsonkey[:strings.Index(bsonkey, ",")]
+		}
+		if bsonkey == "-" {
+			continue
+		}
+
+		if bsonkey == "" {
+			bsonkey = rsfield.Name
+		}
 
 		fullKey := prefix + bsonkey
 
 		newIdxArr := langext.ArrCopy(idxarr)
 		newIdxArr = append(newIdxArr, i)
 
-		if rvfield.Type().Kind() == reflect.Pointer {
+		if langext.InArray("inline", bsontags) && rvfield.Kind() == reflect.Struct {
 
-			c.dataTypeMap[fullKey] = fullTypeRef[TData]{
-				IsPointer:      true,
-				Kind:           rvfield.Type().Elem().Kind(),
-				Type:           rvfield.Type().Elem(),
-				UnderlyingType: langext.Underlying(rvfield.Type().Elem()),
-				Name:           rsfield.Name,
-				Index:          newIdxArr,
-			}
+			// pass-through field
+			c.initFields(prefix, rvfield, m, newIdxArr)
 
 		} else {
 
-			c.dataTypeMap[fullKey] = fullTypeRef[TData]{
-				IsPointer:      false,
-				Kind:           rvfield.Type().Kind(),
-				Type:           rvfield.Type(),
-				UnderlyingType: langext.Underlying(rvfield.Type()),
-				Name:           rsfield.Name,
-				Index:          newIdxArr,
+			if rvfield.Type().Kind() == reflect.Pointer {
+
+				m[fullKey] = fullTypeRef{
+					IsPointer:      true,
+					RealType:       rvfield.Type(),
+					Kind:           rvfield.Type().Elem().Kind(),
+					Type:           rvfield.Type().Elem(),
+					UnderlyingType: reflectext.Underlying(rvfield.Type().Elem()),
+					Name:           rsfield.Name,
+					Index:          newIdxArr,
+				}
+
+			} else {
+
+				m[fullKey] = fullTypeRef{
+					IsPointer:      false,
+					RealType:       rvfield.Type(),
+					Kind:           rvfield.Type().Kind(),
+					Type:           rvfield.Type(),
+					UnderlyingType: reflectext.Underlying(rvfield.Type()),
+					Name:           rsfield.Name,
+					Index:          newIdxArr,
+				}
+
 			}
 
-		}
+			if rvfield.Kind() == reflect.Struct {
+				c.initFields(fullKey+".", rvfield, m, newIdxArr)
+			}
 
-		if rvfield.Kind() == reflect.Struct {
-			c.initFields(fullKey+".", rvfield, newIdxArr)
 		}
 
 	}
@@ -77,218 +135,81 @@ func (c *Coll[TData]) initFields(prefix string, rval reflect.Value, idxarr []int
 }
 
 func (c *Coll[TData]) getTokenValueAsMongoType(value string, fieldName string) (any, error) {
-	fref := c.dataTypeMap[fieldName]
 
-	if fref.IsPointer && value == "" {
-		pointertype := reflect.New(fref.Type).Type()
-		nilvalue := reflect.Zero(pointertype)
-		outvalue := nilvalue.Interface()
-		return outvalue, nil
+	fref, err := c.getFieldType(fieldName)
+	if err != nil {
+		return nil, err
 	}
 
-	pointerize := func(v any) any {
-		if !fref.IsPointer {
-			return v
-		}
+	pss := reflectext.PrimitiveStringSerializer{}
 
-		rval1 := reflect.ValueOf(v)
-		rval2 := rval1.Convert(fref.Type)
-		rval3 := reflect.New(fref.Type)
-		rval3.Elem().Set(rval2)
-		return rval3.Interface()
-	}
+	return pss.ValueFromString(value, fref.RealType)
 
-	if fref.UnderlyingType == reflect.TypeOf("") {
-
-		rt, ok := langext.TryCastType(value, fref.Type)
-		if !ok {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' from string to %s", fieldName, fref.Type.String()))
-		}
-
-		return pointerize(rt), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(time.Time{}) {
-
-		t, err := time.Parse(time.RFC3339Nano, value)
-		if err != nil {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' as time.Time ('%s')", fieldName, value))
-		}
-
-		rt, ok := langext.TryCastType(t, fref.Type)
-		if !ok {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' from time.Time to %s", fieldName, fref.Type.String()))
-		}
-
-		return pointerize(rt), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(int(0)) {
-
-		t, err := strconv.ParseInt(value, 10, 64)
-		if err != nil {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' as int64 ('%s')", fieldName, value))
-		}
-
-		rt, ok := langext.TryCastType(int(t), fref.Type)
-		if !ok {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' from int to %s", fieldName, fref.Type.String()))
-		}
-
-		return pointerize(rt), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(int32(0)) {
-
-		t, err := strconv.ParseInt(value, 10, 64)
-		if err != nil {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' as int32 ('%s')", fieldName, value))
-		}
-
-		rt, ok := langext.TryCastType(int32(t), fref.Type)
-		if !ok {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' from int32 to %s", fieldName, fref.Type.String()))
-		}
-
-		return pointerize(rt), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(int64(0)) {
-
-		t, err := strconv.ParseInt(value, 10, 64)
-		if err != nil {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' as int64 ('%s')", fieldName, value))
-		}
-
-		rt, ok := langext.TryCastType(int64(t), fref.Type)
-		if !ok {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' from int64 to %s", fieldName, fref.Type.String()))
-		}
-
-		return pointerize(rt), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(float32(0)) {
-
-		t, err := strconv.ParseFloat(value, 64)
-		if err != nil {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' as float32 ('%s')", fieldName, value))
-		}
-
-		rt, ok := langext.TryCastType(float32(t), fref.Type)
-		if !ok {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' from float32 to %s", fieldName, fref.Type.String()))
-		}
-
-		return pointerize(rt), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(float64(0)) {
-
-		t, err := strconv.ParseFloat(value, 64)
-		if err != nil {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' as float64 ('%s')", fieldName, value))
-		}
-
-		rt, ok := langext.TryCastType(float64(t), fref.Type)
-		if !ok {
-			return nil, errors.New(fmt.Sprintf("failed to parse field '%s' from float64 to %s", fieldName, fref.Type.String()))
-		}
-
-		return pointerize(rt), nil
-	}
-
-	return nil, errors.New(fmt.Sprintf("failed to parse field '%s' of type %s (%s)", fieldName, fref.Type.String(), fref.UnderlyingType.String()))
 }
 
 func (c *Coll[TData]) getFieldValueAsTokenString(entity TData, fieldName string) (string, error) {
-	fref := c.dataTypeMap[fieldName]
 
-	realValue := c.getFieldValue(entity, fieldName)
-
-	if langext.IsNil(realValue) {
-		return "", nil
+	realValue, err := c.getFieldValue(entity, fieldName)
+	if err != nil {
+		return "", err
 	}
 
-	reflValue := reflect.ValueOf(realValue)
-	if reflValue.Kind() == reflect.Pointer {
-		reflValue = reflValue.Elem()
-		realValue = reflValue.Interface()
-	}
+	pss := reflectext.PrimitiveStringSerializer{}
 
-	if fref.UnderlyingType == reflect.TypeOf("") {
+	return pss.ValueToString(realValue)
 
-		rt, ok := langext.TryCastType(realValue, reflect.TypeOf(""))
-		if !ok {
-			return "", errors.New(fmt.Sprintf("failed to cast field '%s' from %s to string", fieldName, fref.Type.String()))
-		}
-
-		return rt.(string), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(time.Time{}) {
-		rt, ok := langext.TryCastType(realValue, reflect.TypeOf(time.Time{}))
-		if !ok {
-			return "", errors.New(fmt.Sprintf("failed to cast field '%s' from %s to time.Time", fieldName, fref.Type.String()))
-		}
-
-		return rt.(time.Time).Format(time.RFC3339Nano), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(int(0)) {
-		rt, ok := langext.TryCastType(realValue, reflect.TypeOf(int(0)))
-		if !ok {
-			return "", errors.New(fmt.Sprintf("failed to cast field '%s' from %s to int", fieldName, fref.Type.String()))
-		}
-
-		return strconv.Itoa(rt.(int)), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(int32(0)) {
-		rt, ok := langext.TryCastType(realValue, reflect.TypeOf(int32(0)))
-		if !ok {
-			return "", errors.New(fmt.Sprintf("failed to cast field '%s' from %s to int32", fieldName, fref.Type.String()))
-		}
-
-		return strconv.FormatInt(int64(rt.(int32)), 10), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(int64(0)) {
-		rt, ok := langext.TryCastType(realValue, reflect.TypeOf(int64(0)))
-		if !ok {
-			return "", errors.New(fmt.Sprintf("failed to cast field '%s' from %s to int64", fieldName, fref.Type.String()))
-		}
-
-		return strconv.FormatInt(rt.(int64), 10), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(float32(0)) {
-		rt, ok := langext.TryCastType(realValue, reflect.TypeOf(float32(0)))
-		if !ok {
-			return "", errors.New(fmt.Sprintf("failed to cast field '%s' from %s to float32", fieldName, fref.Type.String()))
-		}
-
-		return strconv.FormatFloat(float64(rt.(float32)), 'f', -1, 32), nil
-	}
-
-	if fref.UnderlyingType == reflect.TypeOf(float64(0)) {
-		rt, ok := langext.TryCastType(realValue, reflect.TypeOf(float64(0)))
-		if !ok {
-			return "", errors.New(fmt.Sprintf("failed to cast field '%s' from %s to float64", fieldName, fref.Type.String()))
-		}
-
-		return strconv.FormatFloat(rt.(float64), 'f', -1, 64), nil
-	}
-
-	return "", errors.New(fmt.Sprintf("failed to parse field '%s' of type %s (%s)", fieldName, fref.Type.String(), fref.UnderlyingType.String()))
 }
 
-func (c *Coll[TData]) getFieldType(fieldName string) fullTypeRef[TData] {
-	return c.dataTypeMap[fieldName]
+func (c *Coll[TData]) getFieldType(fieldName string) (fullTypeRef, error) {
+	if c.isInterfaceDataType {
+
+		for _, m := range c.implDataTypeMap {
+			if r, ok := m[fieldName]; ok {
+				return r, nil
+			}
+		}
+
+		return fullTypeRef{}, errors.New("unknown field: '" + fieldName + "' (in any impl)")
+
+	} else {
+
+		if r, ok := c.dataTypeMap[fieldName]; ok {
+			return r, nil
+		} else {
+			return fullTypeRef{}, errors.New("unknown field: '" + fieldName + "'")
+		}
+
+	}
+
 }
 
-func (c *Coll[TData]) getFieldValue(data TData, fieldName string) any {
-	fref := c.dataTypeMap[fieldName]
-	rval := reflect.ValueOf(data)
-	return rval.FieldByIndex(fref.Index).Interface()
+func (c *Coll[TData]) getFieldValue(data TData, fieldName string) (any, error) {
+	if c.isInterfaceDataType {
+
+		rval := reflect.ValueOf(data)
+		for rval.Type().Kind() == reflect.Pointer {
+			rval = rval.Elem()
+		}
+
+		if m, ok := c.implDataTypeMap[rval.Type()]; ok {
+			if fref, ok := m[fieldName]; ok {
+				rval := reflect.ValueOf(data)
+				return rval.FieldByIndex(fref.Index).Interface(), nil
+			} else {
+				return nil, errors.New("unknown bson field '" + fieldName + "' in type '" + rval.Type().String() + "'")
+			}
+		} else {
+			return nil, errors.New("unknown TData type: '" + rval.Type().String() + "'")
+		}
+
+	} else {
+
+		if fref, ok := c.dataTypeMap[fieldName]; ok {
+			rval := reflect.ValueOf(data)
+			return rval.FieldByIndex(fref.Index).Interface(), nil
+		} else {
+			return nil, errors.New("unknown bson field '" + fieldName + "'")
+		}
+
+	}
 }

wmo/reflection_test.go

@@ -1,9 +1,14 @@
 package wmo
 
 import (
+	"context"
+	"go.mongodb.org/mongo-driver/bson/primitive"
 	"go.mongodb.org/mongo-driver/mongo"
 	"gogs.mikescher.com/BlackForestBytes/goext/langext"
+	"gogs.mikescher.com/BlackForestBytes/goext/rfctime"
+	"gogs.mikescher.com/BlackForestBytes/goext/timeext"
 	"gogs.mikescher.com/BlackForestBytes/goext/tst"
+	"reflect"
 	"testing"
 	"time"
 )
@@ -18,8 +23,9 @@ func TestReflectionGetFieldType(t *testing.T) {
 		Sub   struct {
 			A string `bson:"a"`
 		} `bson:"sub"`
-		Str string `bson:"str"`
-		Ptr *int   `bson:"ptr"`
+		Str   string                  `bson:"str"`
+		Ptr   *int                    `bson:"ptr"`
+		MDate rfctime.RFC3339NanoTime `bson:"mdate"`
 	}
 
 	coll := W[TestData](&mongo.Collection{})
@@ -27,6 +33,7 @@ func TestReflectionGetFieldType(t *testing.T) {
 	coll.init()
 
 	t0 := time.Now()
+	t1 := rfctime.NewRFC3339Nano(t0)
 
 	d := TestData{
 		ID:    "1",
@@ -36,39 +43,56 @@ func TestReflectionGetFieldType(t *testing.T) {
 		}{
 			A: "2",
 		},
-		Str: "3",
-		Ptr: langext.Ptr(4),
+		Str:   "3",
+		Ptr:   langext.Ptr(4),
+		MDate: t1,
 	}
 
-	tst.AssertEqual(t, coll.getFieldType("_id").Kind.String(), "string")
-	tst.AssertEqual(t, coll.getFieldType("_id").Type.String(), "wmo.IDType")
-	tst.AssertEqual(t, coll.getFieldType("_id").Name, "ID")
-	tst.AssertEqual(t, coll.getFieldType("_id").IsPointer, false)
-	tst.AssertEqual(t, coll.getFieldValue(d, "_id").(IDType), "1")
+	gft := func(k string) fullTypeRef {
+		v, err := coll.getFieldType(k)
+		if err != nil {
+			t.Errorf("%s: %v", "failed to getFieldType", err)
+		}
+		return v
+	}
 
-	tst.AssertEqual(t, coll.getFieldType("cdate").Kind.String(), "struct")
-	tst.AssertEqual(t, coll.getFieldType("cdate").Type.String(), "time.Time")
-	tst.AssertEqual(t, coll.getFieldType("cdate").Name, "CDate")
-	tst.AssertEqual(t, coll.getFieldType("cdate").IsPointer, false)
-	tst.AssertEqual(t, coll.getFieldValue(d, "cdate").(time.Time), t0)
+	gfv := func(k string) any {
+		v, err := coll.getFieldValue(d, k)
+		if err != nil {
+			t.Errorf("%s: %v", "failed to getFieldType", err)
+		}
+		return v
+	}
 
-	tst.AssertEqual(t, coll.getFieldType("sub.a").Kind.String(), "string")
-	tst.AssertEqual(t, coll.getFieldType("sub.a").Type.String(), "string")
-	tst.AssertEqual(t, coll.getFieldType("sub.a").Name, "A")
-	tst.AssertEqual(t, coll.getFieldType("sub.a").IsPointer, false)
-	tst.AssertEqual(t, coll.getFieldValue(d, "sub.a").(string), "2")
+	tst.AssertEqual(t, gft("_id").Kind.String(), "string")
+	tst.AssertEqual(t, gft("_id").Type.String(), "wmo.IDType")
+	tst.AssertEqual(t, gft("_id").Name, "ID")
+	tst.AssertEqual(t, gft("_id").IsPointer, false)
+	tst.AssertEqual(t, gfv("_id").(IDType), "1")
 
-	tst.AssertEqual(t, coll.getFieldType("str").Kind.String(), "string")
-	tst.AssertEqual(t, coll.getFieldType("str").Type.String(), "string")
-	tst.AssertEqual(t, coll.getFieldType("str").Name, "Str")
-	tst.AssertEqual(t, coll.getFieldType("str").IsPointer, false)
-	tst.AssertEqual(t, coll.getFieldValue(d, "str").(string), "3")
+	tst.AssertEqual(t, gft("cdate").Kind.String(), "struct")
+	tst.AssertEqual(t, gft("cdate").Type.String(), "time.Time")
+	tst.AssertEqual(t, gft("cdate").Name, "CDate")
+	tst.AssertEqual(t, gft("cdate").IsPointer, false)
+	tst.AssertEqual(t, gfv("cdate").(time.Time), t0)
 
-	tst.AssertEqual(t, coll.getFieldType("ptr").Kind.String(), "int")
-	tst.AssertEqual(t, coll.getFieldType("ptr").Type.String(), "int")
-	tst.AssertEqual(t, coll.getFieldType("ptr").Name, "Ptr")
-	tst.AssertEqual(t, coll.getFieldType("ptr").IsPointer, true)
-	tst.AssertEqual(t, *coll.getFieldValue(d, "ptr").(*int), 4)
+	tst.AssertEqual(t, gft("sub.a").Kind.String(), "string")
+	tst.AssertEqual(t, gft("sub.a").Type.String(), "string")
+	tst.AssertEqual(t, gft("sub.a").Name, "A")
+	tst.AssertEqual(t, gft("sub.a").IsPointer, false)
+	tst.AssertEqual(t, gfv("sub.a").(string), "2")
+
+	tst.AssertEqual(t, gft("str").Kind.String(), "string")
+	tst.AssertEqual(t, gft("str").Type.String(), "string")
+	tst.AssertEqual(t, gft("str").Name, "Str")
+	tst.AssertEqual(t, gft("str").IsPointer, false)
+	tst.AssertEqual(t, gfv("str").(string), "3")
+
+	tst.AssertEqual(t, gft("ptr").Kind.String(), "int")
+	tst.AssertEqual(t, gft("ptr").Type.String(), "int")
+	tst.AssertEqual(t, gft("ptr").Name, "Ptr")
+	tst.AssertEqual(t, gft("ptr").IsPointer, true)
+	tst.AssertEqual(t, *gfv("ptr").(*int), 4)
 }
 
 func TestReflectionGetTokenValueAsMongoType(t *testing.T) {
@@ -81,9 +105,10 @@ func TestReflectionGetTokenValueAsMongoType(t *testing.T) {
 		Sub   struct {
 			A string `bson:"a"`
 		} `bson:"sub"`
-		Str string `bson:"str"`
-		Ptr *int   `bson:"ptr"`
-		Num int    `bson:"num"`
+		Str   string                  `bson:"str"`
+		Ptr   *int                    `bson:"ptr"`
+		Num   int                     `bson:"num"`
+		MDate rfctime.RFC3339NanoTime `bson:"mdate"`
 	}
 
 	coll := W[TestData](&mongo.Collection{})
@@ -94,15 +119,23 @@ func TestReflectionGetTokenValueAsMongoType(t *testing.T) {
 		v, err := coll.getTokenValueAsMongoType(value, fieldName)
 		if err != nil {
 			t.Errorf("%s", "failed to getTokenValueAsMongoType")
+			t.Errorf("%v+", err)
 		}
 		return v
 	}
 
+	tx, err := time.Parse(time.RFC3339Nano, "2009-11-10T23:00:00Z")
+	if err != nil {
+		t.Errorf("%v", err)
+	}
+
 	tst.AssertEqual(t, gtvasmt("hello", "str").(string), "hello")
 	tst.AssertEqual(t, gtvasmt("4", "num").(int), 4)
 	tst.AssertEqual(t, gtvasmt("asdf", "_id").(IDType), "asdf")
 	tst.AssertEqual(t, gtvasmt("", "ptr").(*int), nil)
 	tst.AssertEqual(t, *(gtvasmt("123", "ptr").(*int)), 123)
+	tst.AssertEqual(t, gtvasmt("2009-11-10T23:00:00Z", "cdate").(time.Time), tx)
+	tst.AssertEqual(t, gtvasmt("2009-11-10T23:00:00Z", "mdate").(rfctime.RFC3339NanoTime), rfctime.NewRFC3339Nano(tx))
 }
 
 func TestReflectionGetFieldValueAsTokenString(t *testing.T) {
@@ -115,22 +148,25 @@ func TestReflectionGetFieldValueAsTokenString(t *testing.T) {
 		Sub   struct {
 			A string `bson:"a"`
 		} `bson:"sub"`
-		Str  string  `bson:"str"`
-		Ptr  *int    `bson:"ptr"`
-		Num  int     `bson:"num"`
-		Ptr2 *int    `bson:"ptr2"`
-		FFF  float64 `bson:"fff"`
+		Str   string                  `bson:"str"`
+		Ptr   *int                    `bson:"ptr"`
+		Num   int                     `bson:"num"`
+		Ptr2  *int                    `bson:"ptr2"`
+		FFF   float64                 `bson:"fff"`
+		MDate rfctime.RFC3339NanoTime `bson:"mdate"`
 	}
 
 	coll := W[TestData](&mongo.Collection{})
 
 	coll.init()
 
-	t0 := time.Now()
+	t0 := time.Date(2000, 1, 1, 12, 0, 0, 0, timeext.TimezoneBerlin)
+	t1 := rfctime.NewRFC3339Nano(t0)
 
 	d := TestData{
 		ID:    "1",
 		CDate: t0,
+		MDate: t1,
 		Sub: struct {
 			A string `bson:"a"`
 		}{
@@ -146,7 +182,7 @@ func TestReflectionGetFieldValueAsTokenString(t *testing.T) {
 	gfvats := func(value TestData, fieldName string) string {
 		v, err := coll.getFieldValueAsTokenString(value, fieldName)
 		if err != nil {
-			t.Errorf("%s", "failed to getTokenValueAsMongoType")
+			t.Errorf("%s: %v", "failed to getTokenValueAsMongoType", err)
 		}
 		return v
 	}
@@ -157,4 +193,34 @@ func TestReflectionGetFieldValueAsTokenString(t *testing.T) {
 	tst.AssertEqual(t, gfvats(d, "ptr"), "4")
 	tst.AssertEqual(t, gfvats(d, "ptr2"), "")
 	tst.AssertEqual(t, gfvats(d, "fff"), "22.5")
+	tst.AssertEqual(t, gfvats(d, "cdate"), t0.Format(time.RFC3339Nano))
+	tst.AssertEqual(t, gfvats(d, "mdate"), t0.Format(time.RFC3339Nano))
+}
+
+func TestReflectionWithInterface(t *testing.T) {
+
+	type TestData struct {
+		ID    primitive.ObjectID `bson:"_id"`
+		CDate time.Time          `bson:"cdate"`
+	}
+
+	type TestInterface interface {
+	}
+
+	coll1 := W[TestInterface](&mongo.Collection{})
+
+	tst.AssertTrue(t, coll1.coll != nil)
+	tst.AssertEqual(t, 0, len(coll1.implDataTypeMap))
+
+	df := func(ctx context.Context, dec Decodable) (TestInterface, error) {
+		return TestData{}, nil
+	}
+
+	coll2 := W[TestInterface](&mongo.Collection{}).WithDecodeFunc(df, TestData{})
+
+	tst.AssertTrue(t, coll2.coll != nil)
+	tst.AssertEqual(t, 1, len(coll2.implDataTypeMap))
+
+	tst.AssertEqual(t, "ID", coll2.implDataTypeMap[reflect.TypeOf(TestData{})]["_id"].Name)
+	tst.AssertEqual(t, "CDate", coll2.implDataTypeMap[reflect.TypeOf(TestData{})]["cdate"].Name)
 }