init

pkg/utils/utils.go

@@ -0,0 +1,94 @@
+package utils
+
+import (
+	"math"
+	"time"
+)
+
+// RoundToTwoDecimals rounds a float64 to two decimal places
+func RoundToTwoDecimals(value float64) float64 {
+	return math.Round(value*100) / 100
+}
+
+// StartOfDay returns the start of the day for a given time
+func StartOfDay(t time.Time) time.Time {
+	return time.Date(t.Year(), t.Month(), t.Day(), 0, 0, 0, 0, t.Location())
+}
+
+// EndOfDay returns the end of the day for a given time
+func EndOfDay(t time.Time) time.Time {
+	return time.Date(t.Year(), t.Month(), t.Day(), 23, 59, 59, 999999999, t.Location())
+}
+
+// StartOfMonth returns the first day of the month for a given time
+func StartOfMonth(t time.Time) time.Time {
+	return time.Date(t.Year(), t.Month(), 1, 0, 0, 0, 0, t.Location())
+}
+
+// EndOfMonth returns the last day of the month for a given time
+func EndOfMonth(t time.Time) time.Time {
+	return StartOfMonth(t).AddDate(0, 1, 0).Add(-time.Nanosecond)
+}
+
+// StartOfYear returns the first day of the year for a given time
+func StartOfYear(t time.Time) time.Time {
+	return time.Date(t.Year(), 1, 1, 0, 0, 0, 0, t.Location())
+}
+
+// EndOfYear returns the last day of the year for a given time
+func EndOfYear(t time.Time) time.Time {
+	return time.Date(t.Year(), 12, 31, 23, 59, 59, 999999999, t.Location())
+}
+
+// StartOfWeek returns the start of the week (Monday) for a given time
+func StartOfWeek(t time.Time) time.Time {
+	weekday := int(t.Weekday())
+	if weekday == 0 {
+		weekday = 7 // Sunday is 7
+	}
+	return StartOfDay(t.AddDate(0, 0, -(weekday - 1)))
+}
+
+// EndOfWeek returns the end of the week (Sunday) for a given time
+func EndOfWeek(t time.Time) time.Time {
+	return EndOfDay(StartOfWeek(t).AddDate(0, 0, 6))
+}
+
+// ParseDate parses a date string in YYYY-MM-DD format
+func ParseDate(dateStr string) (time.Time, error) {
+	return time.Parse("2006-01-02", dateStr)
+}
+
+// FormatDate formats a time to YYYY-MM-DD string
+func FormatDate(t time.Time) string {
+	return t.Format("2006-01-02")
+}
+
+// Min returns the minimum of two integers
+func Min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}
+
+// Max returns the maximum of two integers
+func Max(a, b int) int {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+// Abs returns the absolute value of a float64
+func Abs(value float64) float64 {
+	return math.Abs(value)
+}
+
+// CalculatePercentage calculates the percentage of part relative to total
+func CalculatePercentage(part, total float64) float64 {
+	if total == 0 {
+		return 0
+	}
+	return RoundToTwoDecimals((part / total) * 100)
+}