Add notification interface and refactor UI notifications (#5085)

* add notification interface and refactor UI notifications

* add missing methods on notification interface and notifiy only issue status really changed

* implement NotifyPullRequestReview for ui notification

modules/notification/ui/ui.go

@@ -0,0 +1,134 @@
+// Copyright 2018 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 ui
+
+import (
+	"code.gitea.io/git"
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/notification/base"
+)
+
+type (
+	notificationService struct {
+		issueQueue chan issueNotificationOpts
+	}
+
+	issueNotificationOpts struct {
+		issue                *models.Issue
+		notificationAuthorID int64
+	}
+)
+
+var (
+	_ base.Notifier = &notificationService{}
+)
+
+// NewNotifier create a new notificationService notifier
+func NewNotifier() base.Notifier {
+	return &notificationService{
+		issueQueue: make(chan issueNotificationOpts, 100),
+	}
+}
+
+func (ns *notificationService) Run() {
+	for {
+		select {
+		case opts := <-ns.issueQueue:
+			if err := models.CreateOrUpdateIssueNotifications(opts.issue, opts.notificationAuthorID); err != nil {
+				log.Error(4, "Was unable to create issue notification: %v", err)
+			}
+		}
+	}
+}
+
+func (ns *notificationService) NotifyCreateIssueComment(doer *models.User, repo *models.Repository,
+	issue *models.Issue, comment *models.Comment) {
+	ns.issueQueue <- issueNotificationOpts{
+		issue,
+		doer.ID,
+	}
+}
+
+func (ns *notificationService) NotifyNewIssue(issue *models.Issue) {
+	ns.issueQueue <- issueNotificationOpts{
+		issue,
+		issue.Poster.ID,
+	}
+}
+
+func (ns *notificationService) NotifyIssueChangeStatus(doer *models.User, issue *models.Issue, isClosed bool) {
+	ns.issueQueue <- issueNotificationOpts{
+		issue,
+		doer.ID,
+	}
+}
+
+func (ns *notificationService) NotifyMergePullRequest(pr *models.PullRequest, doer *models.User, gitRepo *git.Repository) {
+	ns.issueQueue <- issueNotificationOpts{
+		pr.Issue,
+		doer.ID,
+	}
+}
+
+func (ns *notificationService) NotifyNewPullRequest(pr *models.PullRequest) {
+	ns.issueQueue <- issueNotificationOpts{
+		pr.Issue,
+		pr.Issue.PosterID,
+	}
+}
+
+func (ns *notificationService) NotifyPullRequestReview(pr *models.PullRequest, r *models.Review, c *models.Comment) {
+	ns.issueQueue <- issueNotificationOpts{
+		pr.Issue,
+		r.Reviewer.ID,
+	}
+}
+
+func (ns *notificationService) NotifyUpdateComment(doer *models.User, c *models.Comment, oldContent string) {
+}
+
+func (ns *notificationService) NotifyDeleteComment(doer *models.User, c *models.Comment) {
+}
+
+func (ns *notificationService) NotifyDeleteRepository(doer *models.User, repo *models.Repository) {
+}
+
+func (ns *notificationService) NotifyForkRepository(doer *models.User, oldRepo, repo *models.Repository) {
+}
+
+func (ns *notificationService) NotifyNewRelease(rel *models.Release) {
+}
+
+func (ns *notificationService) NotifyUpdateRelease(doer *models.User, rel *models.Release) {
+}
+
+func (ns *notificationService) NotifyDeleteRelease(doer *models.User, rel *models.Release) {
+}
+
+func (ns *notificationService) NotifyIssueChangeMilestone(doer *models.User, issue *models.Issue) {
+}
+
+func (ns *notificationService) NotifyIssueChangeContent(doer *models.User, issue *models.Issue, oldContent string) {
+}
+
+func (ns *notificationService) NotifyIssueChangeAssignee(doer *models.User, issue *models.Issue, removed bool) {
+}
+
+func (ns *notificationService) NotifyIssueClearLabels(doer *models.User, issue *models.Issue) {
+}
+
+func (ns *notificationService) NotifyIssueChangeTitle(doer *models.User, issue *models.Issue, oldTitle string) {
+}
+
+func (ns *notificationService) NotifyIssueChangeLabels(doer *models.User, issue *models.Issue,
+	addedLabels []*models.Label, removedLabels []*models.Label) {
+}
+
+func (ns *notificationService) NotifyCreateRepository(doer *models.User, u *models.User, repo *models.Repository) {
+}
+
+func (ns *notificationService) NotifyMigrateRepository(doer *models.User, u *models.User, repo *models.Repository) {
+}