add logging

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

config/config.go

@@ -1,12 +1,16 @@
 package config
 
-import "time"
+import (
+	"log/slog"
+	"time"
+)
 
 type Config struct {
 	Server  ServerConfig `mapstructure:"server"`
 	DB      DBConfig     `mapstructure:"db"`
 	DataDir string       `mapstructure:"data_dir"`
 	Sync    SyncConfig   `mapstructure:"sync"`
+	Log     LogConfig    `mapstructure:"log"`
 }
 
 type ServerConfig struct {
@@ -22,6 +26,24 @@ type SyncConfig struct {
 	Interval string `mapstructure:"interval"`
 }
 
+type LogConfig struct {
+	Level  string `mapstructure:"level"`
+	Format string `mapstructure:"format"`
+}
+
+func (l LogConfig) SlogLevel() slog.Level {
+	switch l.Level {
+	case "debug":
+		return slog.LevelDebug
+	case "warn", "warning":
+		return slog.LevelWarn
+	case "error":
+		return slog.LevelError
+	default:
+		return slog.LevelInfo
+	}
+}
+
 func (s SyncConfig) IntervalDuration() time.Duration {
 	d, err := time.ParseDuration(s.Interval)
 	if err != nil || d <= 0 {