initial

log/log.go

@@ -0,0 +1,100 @@
+package log
+
+import (
+	"log/slog"
+	"os"
+)
+
+// New creates a new logger with the given level and output.
+func New(level Level, output Output) *slog.Logger {
+	var h slog.Handler
+	switch output {
+	case OutputJson:
+		h = slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{Level: level.ToSlog(), AddSource: true})
+	case OutputText:
+		h = slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: level.ToSlog(), AddSource: true})
+	default:
+		h = slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: level.ToSlog(), AddSource: true})
+	}
+	return slog.New(h)
+}
+
+// Level represents the log level.
+type Level string
+
+// ToSlog converts the level to slog.Level.
+func (l Level) ToSlog() slog.Level {
+	switch l {
+	case LevelDebug:
+		return slog.LevelDebug
+	case LevelInfo:
+		return slog.LevelInfo
+	case LevelWarn:
+		return slog.LevelWarn
+	case LevelError:
+		return slog.LevelError
+	default:
+		return slog.LevelInfo
+	}
+}
+
+const (
+	// LogDebug is the debug log level.
+	LevelDebug Level = "debug"
+	// LogInfo is the info log level.
+	LevelInfo Level = "info"
+	// LogWarn is the warn log level.
+	LevelWarn Level = "warn"
+	// LogError is the error log level.
+	LevelError Level = "error"
+)
+
+// ToLevel converts the level to Level.
+func ToLevel(level string) Level {
+	switch level {
+	case "debug":
+		return LevelDebug
+	case "info":
+		return LevelInfo
+	case "warn":
+		return LevelWarn
+	case "error":
+		return LevelError
+	default:
+		return LevelInfo
+	}
+}
+
+// GetLevel returns the log level from the environment variable.
+func GetLevel() Level {
+	level := os.Getenv("LOG_LEVEL")
+	return ToLevel(level)
+}
+
+// Output represents the log output.
+type Output string
+
+const (
+	// OutputJson is the JSON log output.
+	OutputJson Output = "json"
+	// OutputText is the text log output.
+	OutputText Output = "text"
+)
+
+// ToOutput converts the output to Output.
+func ToOutput(output string) Output {
+	switch output {
+	case "json":
+		return OutputJson
+	case "text":
+		return OutputText
+	default:
+		return OutputText
+	}
+}
+
+// GetOutput returns the log output from the environment variable.
+func GetOutput() Output {
+	output := os.Getenv("LOG_OUTPUT")
+	return ToOutput(output)
+}