v0.0.509

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/gin-gonic/gin v1.10.0
 	github.com/glebarez/go-sqlite v1.22.0 // only needed for tests -.-
 	github.com/jmoiron/sqlx v1.4.0
-	github.com/rs/xid v1.5.0
+	github.com/rs/xid v1.6.0
 	github.com/rs/zerolog v1.33.0
 	go.mongodb.org/mongo-driver v1.16.1
 	golang.org/x/crypto v0.26.0
@@ -45,7 +45,7 @@ require (
 	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 v2.2.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.2.3 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
 	github.com/ugorji/go/codec v1.2.12 // indirect

go.sum

@@ -175,6 +175,8 @@ github.com/pelletier/go-toml/v2 v2.2.1 h1:9TA9+T8+8CUCO2+WYnDLCgrYi9+omqKXyjDtos
 github.com/pelletier/go-toml/v2 v2.2.1/go.mod h1:1t835xjRzz80PqgE6HHgN2JOsmgYu/h4qDAS4n929Rs=
 github.com/pelletier/go-toml/v2 v2.2.2 h1:aYUidT7k73Pcl9nb2gScu7NSrKCSHIDE89b3+6Wq+LM=
 github.com/pelletier/go-toml/v2 v2.2.2/go.mod h1:1t835xjRzz80PqgE6HHgN2JOsmgYu/h4qDAS4n929Rs=
+github.com/pelletier/go-toml/v2 v2.2.3 h1:YmeHyLY8mFWbdkNWwpr+qIL2bEqT0o95WSdkNHvL12M=
+github.com/pelletier/go-toml/v2 v2.2.3/go.mod h1:MfCQTFTvCcUyyvvwm1+G6H/jORL20Xlb6rzQu9GuUkc=
 github.com/phpdave11/gofpdi v1.0.7/go.mod h1:vBmVV0Do6hSBHC8uKUQ71JGW+ZGQq74llk/7bXwjDoI=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -184,6 +186,8 @@ github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/rs/xid v1.5.0 h1:mKX4bl4iPYJtEIxp6CYiUuLQ/8DYMoz0PUdtGgMFRVc=
 github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
+github.com/rs/xid v1.6.0 h1:fV591PaemRlL6JfRxGDEPl69wICngIQ3shQtzfy2gxU=
+github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=
 github.com/rs/zerolog v1.31.0 h1:FcTR3NnLWW+NnTwwhFWiJSZr4ECLpqCm6QsEnyvbV4A=
 github.com/rs/zerolog v1.31.0/go.mod h1:/7mN4D5sKwJLZQ2b/znpjC3/GQWY/xaDXUM0kKWRHss=
 github.com/rs/zerolog v1.32.0 h1:keLypqrlIjaFsbmJOBdB/qvyF8KEtCWHwobLp5l/mQ0=

goextVersion.go

@@ -1,5 +1,5 @@
 package goext
 
-const GoextVersion = "0.0.506"
+const GoextVersion = "0.0.509"
 
-const GoextVersionTimestamp = "2024-08-22T11:45:02+0200"
+const GoextVersionTimestamp = "2024-08-26T14:35:49+0200"

gojson/encode.go

@@ -1353,7 +1353,7 @@ func typeFields(t reflect.Type, tagkey string) structFields {
 
 				var jsonfilter []string
 				jsonfilterTag := sf.Tag.Get("jsonfilter")
-				if jsonfilterTag != "" && jsonfilterTag != "-" {
+				if jsonfilterTag != "" {
 					jsonfilter = strings.Split(jsonfilterTag, ",")
 				}
 

langext/io.go

@@ -0,0 +1,15 @@
+package langext
+
+import "io"
+
+type nopCloser struct {
+	io.Writer
+}
+
+func (n nopCloser) Close() error {
+	return nil // no op
+}
+
+func WriteNopCloser(w io.Writer) io.WriteCloser {
+	return nopCloser{w}
+}

timeext/diff.go

@@ -2,6 +2,9 @@ package timeext
 
 import "time"
 
+// YearDifference calculates the difference between two timestamps in years.
+// = t1 - t2
+// returns a float value
 func YearDifference(t1 time.Time, t2 time.Time, tz *time.Location) float64 {
 
 	yDelta := float64(t1.Year() - t2.Year())
@@ -11,3 +14,31 @@ func YearDifference(t1 time.Time, t2 time.Time, tz *time.Location) float64 {
 
 	return yDelta + (processT1 - processT2)
 }
+
+// MonthDifference calculates the difference between two timestamps in months.
+// = t1 - t2
+// returns a float value
+func MonthDifference(t1 time.Time, t2 time.Time) float64 {
+
+	yDelta := float64(t1.Year() - t2.Year())
+	mDelta := float64(t1.Month() - t2.Month())
+
+	dDelta := float64(0)
+
+	t1MonthDays := DaysInMonth(t1)
+	t2MonthDays := DaysInMonth(t2)
+
+	if t2.Year() > t1.Year() || (t2.Year() == t1.Year() && t2.Month() > t1.Month()) {
+		dDelta -= 1
+		dDelta += float64(t1MonthDays-t1.Day()) / float64(t1MonthDays)
+		dDelta += float64(t2.Day()) / float64(t2MonthDays)
+	} else if t2.Year() < t1.Year() || (t2.Year() == t1.Year() && t2.Month() < t1.Month()) {
+		dDelta -= 1
+		dDelta += float64(t1.Day()) / float64(t1MonthDays)
+		dDelta += float64(t2MonthDays-t2.Day()) / float64(t2MonthDays)
+	} else {
+		dDelta += float64(t1.Day()-t2.Day()) / float64(t1MonthDays)
+	}
+
+	return yDelta*12 + mDelta + dDelta
+}

timeext/diff_test.go

@@ -81,3 +81,63 @@ func epsilonEquals(a, b float64) bool {
 	epsilon := 0.01
 	return math.Abs(a-b) < epsilon
 }
+
+func TestMonthDifferenceSameDate(t *testing.T) {
+	t1 := time.Date(2022, 1, 1, 0, 0, 0, 0, time.UTC)
+	t2 := time.Date(2022, 1, 1, 0, 0, 0, 0, time.UTC)
+	expected := 0.0
+	result := MonthDifference(t2, t1)
+	if !epsilonEquals(result, expected) {
+		t.Errorf("Expected %v, got %v", expected, result)
+	}
+}
+
+func TestMonthDifferenceSameMonth(t *testing.T) {
+	t1 := time.Date(2022, 1, 1, 0, 0, 0, 0, time.UTC)
+	t2 := time.Date(2022, 1, 31, 0, 0, 0, 0, time.UTC)
+	expected := 0.967741935483871 // Approximation of 30/31 days
+	result := MonthDifference(t2, t1)
+	if !epsilonEquals(result, expected) {
+		t.Errorf("Expected %v, got %v", expected, result)
+	}
+}
+
+func TestMonthDifferenceDifferentMonthsSameYear(t *testing.T) {
+	t1 := time.Date(2022, 1, 1, 0, 0, 0, 0, time.UTC)
+	t2 := time.Date(2022, 3, 1, 0, 0, 0, 0, time.UTC)
+	expected := 2.0
+	result := MonthDifference(t2, t1)
+	if !epsilonEquals(result, expected) {
+		t.Errorf("Expected %v, got %v", expected, result)
+	}
+}
+
+func TestMonthDifferenceDifferentYears(t *testing.T) {
+	t1 := time.Date(2021, 12, 1, 0, 0, 0, 0, time.UTC)
+	t2 := time.Date(2022, 2, 1, 0, 0, 0, 0, time.UTC)
+	expected := 2.0
+	result := MonthDifference(t2, t1)
+	if !epsilonEquals(result, expected) {
+		t.Errorf("Expected %v, got %v", expected, result)
+	}
+}
+
+func TestMonthDifferenceT1BeforeT2(t *testing.T) {
+	t1 := time.Date(2022, 1, 1, 0, 0, 0, 0, time.UTC)
+	t2 := time.Date(2022, 6, 1, 0, 0, 0, 0, time.UTC)
+	expected := 5.0
+	result := MonthDifference(t2, t1)
+	if !epsilonEquals(result, expected) {
+		t.Errorf("Expected %v, got %v", expected, result)
+	}
+}
+
+func TestMonthDifferenceT1AfterT2(t *testing.T) {
+	t1 := time.Date(2022, 6, 1, 0, 0, 0, 0, time.UTC)
+	t2 := time.Date(2022, 1, 1, 0, 0, 0, 0, time.UTC)
+	expected := -5.0
+	result := MonthDifference(t2, t1)
+	if !epsilonEquals(result, expected) {
+		t.Errorf("Expected %v, got %v", expected, result)
+	}
+}

timeext/time.go

@@ -184,3 +184,10 @@ func AddYears(t time.Time, yearCount float64, tz *time.Location) time.Time {
 
 	return t.Add(time.Duration(float64(t1.Sub(t0)) * floatCount))
 }
+
+func DaysInMonth(t time.Time) int {
+	// https://stackoverflow.com/a/73882035/1761622
+
+	y, m, _ := t.Date()
+	return time.Date(y, m+1, 0, 0, 0, 0, 0, time.UTC).Day()
+}

timeext/time_test.go

@@ -191,3 +191,39 @@ func TestCombineDateAndTime_CombineDifferentParts(t *testing.T) {
 		t.Errorf("Expected %v, got %v", expected, result)
 	}
 }
+
+func TestDaysInMonth_31Days(t *testing.T) {
+	date := time.Date(2022, 1, 1, 0, 0, 0, 0, time.UTC) // January
+	expected := 31
+	result := DaysInMonth(date)
+	if result != expected {
+		t.Errorf("Expected %d but got %d", expected, result)
+	}
+}
+
+func TestDaysInMonth_30Days(t *testing.T) {
+	date := time.Date(2022, 4, 1, 0, 0, 0, 0, time.UTC) // April
+	expected := 30
+	result := DaysInMonth(date)
+	if result != expected {
+		t.Errorf("Expected %d but got %d", expected, result)
+	}
+}
+
+func TestDaysInMonth_FebruaryLeapYear(t *testing.T) {
+	date := time.Date(2020, 2, 1, 0, 0, 0, 0, time.UTC) // February in a leap year
+	expected := 29
+	result := DaysInMonth(date)
+	if result != expected {
+		t.Errorf("Expected %d but got %d", expected, result)
+	}
+}
+
+func TestDaysInMonth_FebruaryNonLeapYear(t *testing.T) {
+	date := time.Date(2021, 2, 1, 0, 0, 0, 0, time.UTC) // February in a non-leap year
+	expected := 28
+	result := DaysInMonth(date)
+	if result != expected {
+		t.Errorf("Expected %d but got %d", expected, result)
+	}
+}