refactor: a better DI-friendy logger implementation that doesn't suck

backend/cmd/main.go

@@ -20,6 +20,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"go.uber.org/fx"
+	"go.uber.org/zap"
 
 	"easywish/config"
 	docs "easywish/docs"
@@ -42,6 +43,7 @@ func main() {
 	fx.New(	
 		fx.Provide(
 			logger.NewLogger,
+			logger.NewSyncLogger,
 			gin.Default,
 		),
 		database.Module,
@@ -49,7 +51,7 @@ func main() {
 		controllers.Module,
 		routes.Module,
 
-		fx.Invoke(func(lc fx.Lifecycle, router *gin.Engine) {
+		fx.Invoke(func(lc fx.Lifecycle, router *gin.Engine, syncLogger *logger.SyncLogger) {
 
 			// Swagger
 			docs.SwaggerInfo.Schemes = []string{"http"}
@@ -65,6 +67,7 @@ func main() {
 				OnStart: func(ctx context.Context) error {
 					go func() {
 						if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+							syncLogger.Fatal("Server failed", zap.Error(err))
 						}
 					}()
 					return nil
@@ -72,7 +75,15 @@ func main() {
 				OnStop: func(ctx context.Context) error {
 					shutdownCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 					defer cancel()
-					return server.Shutdown(shutdownCtx)
+
+					if err := server.Shutdown(shutdownCtx); err != nil {
+						syncLogger.Error("Server shutdown error", zap.Error(err))
+					}
+
+					if err := syncLogger.Close(); err != nil {
+						syncLogger.Error("Logger sync error", zap.Error(err))
+					}
+					return nil
 				},
 			})
 		}),