feat: add logging

common/logger/logger.go

@@ -0,0 +1,41 @@
+package logger
+
+import (
+	"log"
+	"os"
+)
+
+var (
+	debugEnabled bool
+	infoLogger   *log.Logger
+	debugLogger  *log.Logger
+	errorLogger  *log.Logger
+)
+
+func init() {
+	infoLogger = log.New(os.Stderr, "[INFO] ", log.Ltime|log.Lshortfile)
+	debugLogger = log.New(os.Stderr, "[DEBUG] ", log.Ltime|log.Lshortfile)
+	errorLogger = log.New(os.Stderr, "[ERROR] ", log.Ltime|log.Lshortfile)
+}
+
+func SetDebug(enabled bool) {
+	debugEnabled = enabled
+}
+
+func IsDebugEnabled() bool {
+	return debugEnabled
+}
+
+func Info(format string, args ...any) {
+	infoLogger.Printf(format, args...)
+}
+
+func Debug(format string, args ...any) {
+	if debugEnabled {
+		debugLogger.Printf(format, args...)
+	}
+}
+
+func Error(format string, args ...any) {
+	errorLogger.Printf(format, args...)
+}