initial commit

logger/logger.go

@@ -0,0 +1,71 @@
+package logger
+
+import (
+	"io"
+)
+
+// LogFormat is format type
+type LogFormat string
+
+const (
+	TextFormat LogFormat = "text"
+	JSONFormat LogFormat = "json"
+)
+
+// LogLevel is Logger Level type
+type LogLevel string
+
+const (
+	// DebugLevel has verbose message
+	DebugLevel LogLevel = "debug"
+	// InfoLevel is default log level
+	InfoLevel LogLevel = "info"
+	// WarnLevel is for logging messages about possible issues
+	WarnLevel LogLevel = "warn"
+	// ErrorLevel is for logging errors
+	ErrorLevel LogLevel = "error"
+	// FatalLevel is for logging fatal messages. The system shuts down after logging the message.
+	FatalLevel LogLevel = "fatal"
+)
+
+type Logger interface {
+	WithFields(map[string]any) Logger
+	Debug(args ...any)
+	Debugf(format string, args ...any)
+	Info(args ...any)
+	Infof(format string, args ...any)
+	Warn(args ...any)
+	Warnf(format string, args ...any)
+	Error(args ...any)
+	Errorf(format string, args ...any)
+	Fatal(args ...any)
+	Fatalf(format string, args ...any)
+	GetLevel() LogLevel
+	IsLevelEnabled(level LogLevel) bool
+}
+
+type LoggerOptions struct {
+	Output io.Writer
+	Format LogFormat
+	Level  LogLevel
+}
+
+type LoggerOption func(opts *LoggerOptions)
+
+func OutputLoggerOption(out io.Writer) LoggerOption {
+	return func(opts *LoggerOptions) {
+		opts.Output = out
+	}
+}
+
+func FormatLoggerOption(format LogFormat) LoggerOption {
+	return func(opts *LoggerOptions) {
+		opts.Format = format
+	}
+}
+
+func LevelLoggerOption(level LogLevel) LoggerOption {
+	return func(opts *LoggerOptions) {
+		opts.Level = level
+	}
+}