feat: rename file only when storagePath exists

core/download.go

@@ -27,13 +27,7 @@ import (
 )
 
 func processPendingTask(task *types.Task) error {
-	common.Log.Debugf("Start processing task: %s", task.String())
-
-	if task.FileName() != "" && !task.IsTelegraph && task.File.FileSize != 0 && task.FileDBID != 0 {
-		ext := path.Ext(task.FileName())
-		name := task.FileName()[:len(task.FileName())-len(ext)]
-		task.File.FileName = fmt.Sprintf("%s_%d%s", name, task.FileDBID, ext)
-	}
+	common.Log.Infof("Start processing task: %s", task.String())
 
 	if task.FileName() == "" {
 		task.File.FileName = fmt.Sprintf("%d_%d_%s", task.FileChatID, task.FileMessageID, task.File.Hash())

core/rule.go

@@ -26,24 +26,31 @@ func getStorageAndPathForTask(task *types.Task) (storage.Storage, string, error)
 		return nil, "", err
 	}
 	storagePath := taskStorage.JoinStoragePath(*task)
-	if !user.ApplyRule || user.Rules == nil {
-		return taskStorage, storagePath, nil
-	}
+
 	var ruleTaskStorage storage.Storage
 	var ruleStoragePath string
+	if user.ApplyRule && user.Rules != nil {
 		for _, rule := range user.Rules {
 			matchStorage, matchStoragePath := applyRule(&rule, *task)
 			if matchStorage != nil && matchStoragePath != "" {
 				ruleTaskStorage = matchStorage
 				ruleStoragePath = matchStoragePath
-		}
-	}
-	if ruleStoragePath == "" || ruleTaskStorage == nil {
-		return taskStorage, storagePath, nil
-	}
 				common.Log.Debugf("Rule matched: %s, %s", ruleTaskStorage.Name(), ruleStoragePath)
 				return ruleTaskStorage, ruleStoragePath, nil
 			}
+		}
+	}
+
+	if taskStorage.Exists(task.Ctx, storagePath) {
+		ext := path.Ext(task.FileName())
+		name := task.FileName()[:len(task.FileName())-len(ext)]
+		task.File.FileName = fmt.Sprintf("%s_%d%s", name, task.FileDBID, ext)
+		task.StoragePath = task.File.FileName
+		storagePath = taskStorage.JoinStoragePath(*task)
+	}
+
+	return taskStorage, storagePath, nil
+}
 
 func applyRule(rule *dao.Rule, task types.Task) (storage.Storage, string) {
 	var DirPath, StorageName string

storage/alist/alist.go

@@ -147,3 +147,8 @@ func (a *Alist) NotSupportStream() string {
 func (a *Alist) JoinStoragePath(task types.Task) string {
 	return path.Join(a.config.BasePath, task.StoragePath)
 }
+
+func (a *Alist) Exists(ctx context.Context, storagePath string) bool {
+	// TODO: Implement it.
+	return false
+}

storage/local/local.go

@@ -63,3 +63,11 @@ func (l *Local) Save(ctx context.Context, r io.Reader, storagePath string) error
 	_, err = io.Copy(file, r)
 	return err
 }
+
+func (l *Local) Exists(ctx context.Context, storagePath string) bool {
+	absPath, err := filepath.Abs(storagePath)
+	if err != nil {
+		return false
+	}
+	return fileutil.IsExist(absPath)
+}

storage/minio/client.go

@@ -70,3 +70,17 @@ func (m *Minio) Save(ctx context.Context, r io.Reader, storagePath string) error
 
 	return nil
 }
+
+func (m *Minio) Exists(ctx context.Context, storagePath string) bool {
+	common.Log.Debugf("Checking if file exists at %s", storagePath)
+	// TODO: test it.
+	_, err := m.client.StatObject(ctx, m.config.BucketName, storagePath, minio.StatObjectOptions{})
+	if err != nil {
+		if minio.ToErrorResponse(err).Code == "NoSuchKey" {
+			return false // File does not exist
+		}
+		return false
+	}
+
+	return true
+}

storage/storage.go

@@ -21,6 +21,7 @@ type Storage interface {
 	Name() string
 	JoinStoragePath(task types.Task) string
 	Save(ctx context.Context, reader io.Reader, storagePath string) error
+	Exists(ctx context.Context, storagePath string) bool
 }
 
 type StorageNotSupportStream interface {

storage/webdav/errs.go

@@ -5,4 +5,5 @@ import "errors"
 var (
 	ErrFailedToCreateDirectory = errors.New("webdav: failed to create directory")
 	ErrFailedToWriteFile       = errors.New("webdav: failed to write file")
+	ErrFailedToCheckFileExists = errors.New("webdav: failed to check if file exists")
 )

storage/webdav/webdav.go

@@ -57,3 +57,13 @@ func (w *Webdav) Save(ctx context.Context, r io.Reader, storagePath string) erro
 	}
 	return nil
 }
+
+func (w *Webdav) Exists(ctx context.Context, storagePath string) bool {
+	common.Log.Debugf("Checking if file exists at %s", storagePath)
+	exists, err := w.client.Exists(ctx, storagePath)
+	if err != nil {
+		common.Log.Errorf("Failed to check if file exists at %s: %v", storagePath, err)
+		return false
+	}
+	return exists
+}