Fixes and improvements

common/sql/timestamp.go

@@ -0,0 +1,53 @@
+package sql
+
+import (
+	"time"
+
+	"github.com/huandu/go-sqlbuilder"
+	E "github.com/sagernet/sing/common/exceptions"
+)
+
+const timestampFormat = "2006-01-02 15:04:05.000"
+
+func FormatTimestamp(t time.Time) string {
+	return t.UTC().Format(timestampFormat)
+}
+
+func ParseTimestamp(value string) (time.Time, error) {
+	return time.ParseInLocation(timestampFormat, value, time.UTC)
+}
+
+func ParseFilterTimestamp(value string) (time.Time, error) {
+	if t, err := time.Parse(time.RFC3339Nano, value); err == nil {
+		return t, nil
+	}
+	if t, err := time.Parse(time.RFC3339, value); err == nil {
+		return t, nil
+	}
+	if t, err := ParseTimestamp(value); err == nil {
+		return t, nil
+	}
+	return time.Time{}, E.New("invalid timestamp: ", value)
+}
+
+func TimestampGreaterEqualThanFilter(field string) Filter {
+	return func(sb *sqlbuilder.SelectBuilder, value []string) error {
+		t, err := ParseFilterTimestamp(value[0])
+		if err != nil {
+			return err
+		}
+		sb.Where(sb.GreaterEqualThan(field, FormatTimestamp(t)))
+		return nil
+	}
+}
+
+func TimestampLessEqualThanFilter(field string) Filter {
+	return func(sb *sqlbuilder.SelectBuilder, value []string) error {
+		t, err := ParseFilterTimestamp(value[0])
+		if err != nil {
+			return err
+		}
+		sb.Where(sb.LessEqualThan(field, FormatTimestamp(t)))
+		return nil
+	}
+}