Add package slogd

Signed-off-by: Jan Tytgat <jan.tytgat@corelayer.eu>

pkg/slogd/level.go

@@ -0,0 +1,56 @@
+package slogd
+
+import (
+	"log/slog"
+	"strings"
+)
+
+const (
+	LevelTrace   = slog.Level(-8)
+	LevelDebug   = slog.LevelDebug
+	LevelInfo    = slog.LevelInfo
+	LevelNotice  = slog.Level(2)
+	LevelWarn    = slog.LevelWarn
+	LevelError   = slog.LevelError
+	LevelFatal   = slog.Level(12)
+	LevelDefault = LevelInfo
+)
+
+var levelNames = map[slog.Leveler]string{
+	LevelTrace:  "TRACE",
+	LevelDebug:  "DEBUG",
+	LevelInfo:   "INFO",
+	LevelNotice: "NOTICE",
+	LevelWarn:   "WARN",
+	LevelError:  "ERROR",
+	LevelFatal:  "FATAL",
+}
+
+func ReplaceAttrs(groups []string, a slog.Attr) slog.Attr {
+	if a.Key == slog.LevelKey {
+		a.Value = slog.StringValue(LevelName(a.Value.Any().(slog.Level)))
+	}
+	return a
+}
+
+func Level(l string) slog.Level {
+	mux.Lock()
+	defer mux.Unlock()
+	for k, v := range levelNames {
+		if strings.ToUpper(l) == v {
+			return k.Level()
+		}
+	}
+	return LevelDefault
+}
+
+func LevelName(l slog.Level) string {
+	mux.Lock()
+	defer mux.Unlock()
+	for k, v := range levelNames {
+		if k == l {
+			return v
+		}
+	}
+	return levelNames[LevelDefault]
+}