Implement sync push mirror on commit (#19411)

Support synchronizing with the push mirrors whenever new commits are pushed or synced from pull mirror.

Related Issues: #18220

Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

modules/notification/mirror/mirror.go

@@ -0,0 +1,45 @@
+// Copyright 2022 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 mirror
+
+import (
+	repo_model "code.gitea.io/gitea/models/repo"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/log"
+	mirror_module "code.gitea.io/gitea/modules/mirror"
+	"code.gitea.io/gitea/modules/notification/base"
+	"code.gitea.io/gitea/modules/repository"
+)
+
+type mirrorNotifier struct {
+	base.NullNotifier
+}
+
+var _ base.Notifier = &mirrorNotifier{}
+
+// NewNotifier create a new mirrorNotifier notifier
+func NewNotifier() base.Notifier {
+	return &mirrorNotifier{}
+}
+
+func (m *mirrorNotifier) NotifyPushCommits(_ *user_model.User, repo *repo_model.Repository, _ *repository.PushUpdateOptions, _ *repository.PushCommits) {
+	syncPushMirrorWithSyncOnCommit(repo.ID)
+}
+
+func (m *mirrorNotifier) NotifySyncPushCommits(_ *user_model.User, repo *repo_model.Repository, _ *repository.PushUpdateOptions, _ *repository.PushCommits) {
+	syncPushMirrorWithSyncOnCommit(repo.ID)
+}
+
+func syncPushMirrorWithSyncOnCommit(repoID int64) {
+	pushMirrors, err := repo_model.GetPushMirrorsSyncedOnCommit(repoID)
+	if err != nil {
+		log.Error("repo_model.GetPushMirrorsSyncedOnCommit failed: %v", err)
+		return
+	}
+
+	for _, mirror := range pushMirrors {
+		mirror_module.AddPushMirrorToQueue(mirror.ID)
+	}
+}