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

3 files changed, 330 insertions, 28 deletions

diff --git a/modules/notification/base/base.go b/modules/notification/base/base.go
new file mode 100644
index 0000000000..bac90f5bb1
--- /dev/null
+++ b/modules/notification/base/base.go
@@ -0,0 +1,43 @@
+// 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 base
+
+import (
+	"code.gitea.io/git"
+	"code.gitea.io/gitea/models"
+)
+
+// Notifier defines an interface to notify receiver
+type Notifier interface {
+	Run()
+
+	NotifyCreateRepository(doer *models.User, u *models.User, repo *models.Repository)
+	NotifyMigrateRepository(doer *models.User, u *models.User, repo *models.Repository)
+	NotifyDeleteRepository(doer *models.User, repo *models.Repository)
+	NotifyForkRepository(doer *models.User, oldRepo, repo *models.Repository)
+
+	NotifyNewIssue(*models.Issue)
+	NotifyIssueChangeStatus(*models.User, *models.Issue, bool)
+	NotifyIssueChangeMilestone(doer *models.User, issue *models.Issue)
+	NotifyIssueChangeAssignee(doer *models.User, issue *models.Issue, removed bool)
+	NotifyIssueChangeContent(doer *models.User, issue *models.Issue, oldContent string)
+	NotifyIssueClearLabels(doer *models.User, issue *models.Issue)
+	NotifyIssueChangeTitle(doer *models.User, issue *models.Issue, oldTitle string)
+	NotifyIssueChangeLabels(doer *models.User, issue *models.Issue,
+		addedLabels []*models.Label, removedLabels []*models.Label)
+
+	NotifyNewPullRequest(*models.PullRequest)
+	NotifyMergePullRequest(*models.PullRequest, *models.User, *git.Repository)
+	NotifyPullRequestReview(*models.PullRequest, *models.Review, *models.Comment)
+
+	NotifyCreateIssueComment(*models.User, *models.Repository,
+		*models.Issue, *models.Comment)
+	NotifyUpdateComment(*models.User, *models.Comment, string)
+	NotifyDeleteComment(*models.User, *models.Comment)
+
+	NotifyNewRelease(rel *models.Release)
+	NotifyUpdateRelease(doer *models.User, rel *models.Release)
+	NotifyDeleteRelease(doer *models.User, rel *models.Release)
+}
diff --git a/modules/notification/notification.go b/modules/notification/notification.go
index ffe885240b..3f3579394e 100644
--- a/modules/notification/notification.go
+++ b/modules/notification/notification.go
@@ -1,50 +1,175 @@
-// Copyright 2016 The Gitea Authors. All rights reserved.
+// 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 notification
 
 import (
+	"code.gitea.io/git"
 	"code.gitea.io/gitea/models"
-	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/notification/base"
+	"code.gitea.io/gitea/modules/notification/ui"
 )
 
-type (
-	notificationService struct {
-		issueQueue chan issueNotificationOpts
+var (
+	notifiers []base.Notifier
+)
+
+// RegisterNotifier providers method to receive notify messages
+func RegisterNotifier(notifier base.Notifier) {
+	go notifier.Run()
+	notifiers = append(notifiers, notifier)
+}
+
+func init() {
+	RegisterNotifier(ui.NewNotifier())
+}
+
+// NotifyCreateIssueComment notifies issue comment related message to notifiers
+func NotifyCreateIssueComment(doer *models.User, repo *models.Repository,
+	issue *models.Issue, comment *models.Comment) {
+	for _, notifier := range notifiers {
+		notifier.NotifyCreateIssueComment(doer, repo, issue, comment)
 	}
+}
 
-	issueNotificationOpts struct {
-		issue                *models.Issue
-		notificationAuthorID int64
+// NotifyNewIssue notifies new issue to notifiers
+func NotifyNewIssue(issue *models.Issue) {
+	for _, notifier := range notifiers {
+		notifier.NotifyNewIssue(issue)
 	}
-)
+}
 
-var (
-	// Service is the notification service
-	Service = &notificationService{
-		issueQueue: make(chan issueNotificationOpts, 100),
+// NotifyIssueChangeStatus notifies close or reopen issue to notifiers
+func NotifyIssueChangeStatus(doer *models.User, issue *models.Issue, closeOrReopen bool) {
+	for _, notifier := range notifiers {
+		notifier.NotifyIssueChangeStatus(doer, issue, closeOrReopen)
 	}
-)
+}
 
-func init() {
-	go Service.Run()
+// NotifyMergePullRequest notifies merge pull request to notifiers
+func NotifyMergePullRequest(pr *models.PullRequest, doer *models.User, baseGitRepo *git.Repository) {
+	for _, notifier := range notifiers {
+		notifier.NotifyMergePullRequest(pr, doer, baseGitRepo)
+	}
+}
+
+// NotifyNewPullRequest notifies new pull request to notifiers
+func NotifyNewPullRequest(pr *models.PullRequest) {
+	for _, notifier := range notifiers {
+		notifier.NotifyNewPullRequest(pr)
+	}
+}
+
+// NotifyPullRequestReview notifies new pull request review
+func NotifyPullRequestReview(pr *models.PullRequest, review *models.Review, comment *models.Comment) {
+	for _, notifier := range notifiers {
+		notifier.NotifyPullRequestReview(pr, review, comment)
+	}
+}
+
+// NotifyUpdateComment notifies update comment to notifiers
+func NotifyUpdateComment(doer *models.User, c *models.Comment, oldContent string) {
+	for _, notifier := range notifiers {
+		notifier.NotifyUpdateComment(doer, c, oldContent)
+	}
+}
+
+// NotifyDeleteComment notifies delete comment to notifiers
+func NotifyDeleteComment(doer *models.User, c *models.Comment) {
+	for _, notifier := range notifiers {
+		notifier.NotifyDeleteComment(doer, c)
+	}
+}
+
+// NotifyDeleteRepository notifies delete repository to notifiers
+func NotifyDeleteRepository(doer *models.User, repo *models.Repository) {
+	for _, notifier := range notifiers {
+		notifier.NotifyDeleteRepository(doer, repo)
+	}
+}
+
+// NotifyForkRepository notifies fork repository to notifiers
+func NotifyForkRepository(doer *models.User, oldRepo, repo *models.Repository) {
+	for _, notifier := range notifiers {
+		notifier.NotifyForkRepository(doer, oldRepo, repo)
+	}
+}
+
+// NotifyNewRelease notifies new release to notifiers
+func NotifyNewRelease(rel *models.Release) {
+	for _, notifier := range notifiers {
+		notifier.NotifyNewRelease(rel)
+	}
+}
+
+// NotifyUpdateRelease notifies update release to notifiers
+func NotifyUpdateRelease(doer *models.User, rel *models.Release) {
+	for _, notifier := range notifiers {
+		notifier.NotifyUpdateRelease(doer, rel)
+	}
+}
+
+// NotifyDeleteRelease notifies delete release to notifiers
+func NotifyDeleteRelease(doer *models.User, rel *models.Release) {
+	for _, notifier := range notifiers {
+		notifier.NotifyDeleteRelease(doer, rel)
+	}
+}
+
+// NotifyIssueChangeMilestone notifies change milestone to notifiers
+func NotifyIssueChangeMilestone(doer *models.User, issue *models.Issue) {
+	for _, notifier := range notifiers {
+		notifier.NotifyIssueChangeMilestone(doer, issue)
+	}
+}
+
+// NotifyIssueChangeContent notifies change content to notifiers
+func NotifyIssueChangeContent(doer *models.User, issue *models.Issue, oldContent string) {
+	for _, notifier := range notifiers {
+		notifier.NotifyIssueChangeContent(doer, issue, oldContent)
+	}
+}
+
+// NotifyIssueChangeAssignee notifies change content to notifiers
+func NotifyIssueChangeAssignee(doer *models.User, issue *models.Issue, removed bool) {
+	for _, notifier := range notifiers {
+		notifier.NotifyIssueChangeAssignee(doer, issue, removed)
+	}
+}
+
+// NotifyIssueClearLabels notifies clear labels to notifiers
+func NotifyIssueClearLabels(doer *models.User, issue *models.Issue) {
+	for _, notifier := range notifiers {
+		notifier.NotifyIssueClearLabels(doer, issue)
+	}
+}
+
+// NotifyIssueChangeTitle notifies change title to notifiers
+func NotifyIssueChangeTitle(doer *models.User, issue *models.Issue, oldTitle string) {
+	for _, notifier := range notifiers {
+		notifier.NotifyIssueChangeTitle(doer, issue, oldTitle)
+	}
+}
+
+// NotifyIssueChangeLabels notifies change labels to notifiers
+func NotifyIssueChangeLabels(doer *models.User, issue *models.Issue,
+	addedLabels []*models.Label, removedLabels []*models.Label) {
+	for _, notifier := range notifiers {
+		notifier.NotifyIssueChangeLabels(doer, issue, addedLabels, removedLabels)
+	}
 }
 
-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)
-			}
-		}
+// NotifyCreateRepository notifies create repository to notifiers
+func NotifyCreateRepository(doer *models.User, u *models.User, repo *models.Repository) {
+	for _, notifier := range notifiers {
+		notifier.NotifyCreateRepository(doer, u, repo)
 	}
 }
 
-func (ns *notificationService) NotifyIssue(issue *models.Issue, notificationAuthorID int64) {
-	ns.issueQueue <- issueNotificationOpts{
-		issue,
-		notificationAuthorID,
+// NotifyMigrateRepository notifies create repository to notifiers
+func NotifyMigrateRepository(doer *models.User, u *models.User, repo *models.Repository) {
+	for _, notifier := range notifiers {
+		notifier.NotifyMigrateRepository(doer, u, repo)
 	}
 }
diff --git a/modules/notification/ui/ui.go b/modules/notification/ui/ui.go
new file mode 100644
index 0000000000..f0d708eb54
--- /dev/null
+++ b/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) {
+}