Move transfer repository and rename repository on a service package and start action notification (#8573)

* move transfer repository and rename repository on a service package and start action notification

* remove unused codes

* fix lint

* fix bugs

* fix test

* fix test

* fix test

* fix lint

* update go mod and sum

services/repository/transfer.go

@@ -0,0 +1,54 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package repository
+
+import (
+	"fmt"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/notification"
+)
+
+// TransferOwnership transfers all corresponding setting from old user to new one.
+func TransferOwnership(doer *models.User, newOwnerName string, repo *models.Repository) error {
+	if err := repo.GetOwner(); err != nil {
+		return err
+	}
+
+	oldOwner := repo.Owner
+
+	if err := models.TransferOwnership(doer, newOwnerName, repo); err != nil {
+		return err
+	}
+
+	if err := models.NewRepoRedirect(oldOwner.ID, repo.ID, repo.Name, repo.Name); err != nil {
+		return fmt.Errorf("NewRepoRedirect: %v", err)
+	}
+
+	notification.NotifyTransferRepository(doer, repo, oldOwner.Name)
+
+	return nil
+}
+
+// ChangeRepositoryName changes all corresponding setting from old repository name to new one.
+func ChangeRepositoryName(doer *models.User, repo *models.Repository, newRepoName string) error {
+	oldRepoName := repo.Name
+
+	if err := models.ChangeRepositoryName(doer, repo, newRepoName); err != nil {
+		return err
+	}
+
+	if err := repo.GetOwner(); err != nil {
+		return err
+	}
+
+	if err := models.NewRepoRedirect(repo.Owner.ID, repo.ID, oldRepoName, newRepoName); err != nil {
+		return err
+	}
+
+	notification.NotifyRenameRepository(doer, repo, oldRepoName)
+
+	return nil
+}