Move mail notification logic to service layer (#26905)

Extract from #22266

2 files changed, 206 insertions, 0 deletions

diff --git a/services/mailer/mailer.go b/services/mailer/mailer.go
index ee4721d438..8336eefc73 100644
--- a/services/mailer/mailer.go
+++ b/services/mailer/mailer.go
@@ -21,6 +21,7 @@ import (
 	"code.gitea.io/gitea/modules/base"
 	"code.gitea.io/gitea/modules/graceful"
 	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/notification"
 	"code.gitea.io/gitea/modules/process"
 	"code.gitea.io/gitea/modules/queue"
 	"code.gitea.io/gitea/modules/setting"
@@ -392,6 +393,10 @@ func NewContext(ctx context.Context) {
 		return
 	}
 
+	if setting.Service.EnableNotifyMail {
+		notification.RegisterNotifier(NewNotifier())
+	}
+
 	switch setting.MailService.Protocol {
 	case "sendmail":
 		Sender = &sendmailSender{}
diff --git a/services/mailer/notify.go b/services/mailer/notify.go
new file mode 100644
index 0000000000..d059d04cc9
--- /dev/null
+++ b/services/mailer/notify.go
@@ -0,0 +1,201 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package mailer
+
+import (
+	"context"
+	"fmt"
+
+	activities_model "code.gitea.io/gitea/models/activities"
+	issues_model "code.gitea.io/gitea/models/issues"
+	repo_model "code.gitea.io/gitea/models/repo"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/notification/base"
+)
+
+type mailNotifier struct {
+	base.NullNotifier
+}
+
+var _ base.Notifier = &mailNotifier{}
+
+// NewNotifier create a new mailNotifier notifier
+func NewNotifier() base.Notifier {
+	return &mailNotifier{}
+}
+
+func (m *mailNotifier) NotifyCreateIssueComment(ctx context.Context, doer *user_model.User, repo *repo_model.Repository,
+	issue *issues_model.Issue, comment *issues_model.Comment, mentions []*user_model.User,
+) {
+	var act activities_model.ActionType
+	if comment.Type == issues_model.CommentTypeClose {
+		act = activities_model.ActionCloseIssue
+	} else if comment.Type == issues_model.CommentTypeReopen {
+		act = activities_model.ActionReopenIssue
+	} else if comment.Type == issues_model.CommentTypeComment {
+		act = activities_model.ActionCommentIssue
+	} else if comment.Type == issues_model.CommentTypeCode {
+		act = activities_model.ActionCommentIssue
+	} else if comment.Type == issues_model.CommentTypePullRequestPush {
+		act = 0
+	}
+
+	if err := MailParticipantsComment(ctx, comment, act, issue, mentions); err != nil {
+		log.Error("MailParticipantsComment: %v", err)
+	}
+}
+
+func (m *mailNotifier) NotifyNewIssue(ctx context.Context, issue *issues_model.Issue, mentions []*user_model.User) {
+	if err := MailParticipants(ctx, issue, issue.Poster, activities_model.ActionCreateIssue, mentions); err != nil {
+		log.Error("MailParticipants: %v", err)
+	}
+}
+
+func (m *mailNotifier) NotifyIssueChangeStatus(ctx context.Context, doer *user_model.User, commitID string, issue *issues_model.Issue, actionComment *issues_model.Comment, isClosed bool) {
+	var actionType activities_model.ActionType
+	if issue.IsPull {
+		if isClosed {
+			actionType = activities_model.ActionClosePullRequest
+		} else {
+			actionType = activities_model.ActionReopenPullRequest
+		}
+	} else {
+		if isClosed {
+			actionType = activities_model.ActionCloseIssue
+		} else {
+			actionType = activities_model.ActionReopenIssue
+		}
+	}
+
+	if err := MailParticipants(ctx, issue, doer, actionType, nil); err != nil {
+		log.Error("MailParticipants: %v", err)
+	}
+}
+
+func (m *mailNotifier) NotifyIssueChangeTitle(ctx context.Context, doer *user_model.User, issue *issues_model.Issue, oldTitle string) {
+	if err := issue.LoadPullRequest(ctx); err != nil {
+		log.Error("issue.LoadPullRequest: %v", err)
+		return
+	}
+	if issue.IsPull && issues_model.HasWorkInProgressPrefix(oldTitle) && !issue.PullRequest.IsWorkInProgress() {
+		if err := MailParticipants(ctx, issue, doer, activities_model.ActionPullRequestReadyForReview, nil); err != nil {
+			log.Error("MailParticipants: %v", err)
+		}
+	}
+}
+
+func (m *mailNotifier) NotifyNewPullRequest(ctx context.Context, pr *issues_model.PullRequest, mentions []*user_model.User) {
+	if err := MailParticipants(ctx, pr.Issue, pr.Issue.Poster, activities_model.ActionCreatePullRequest, mentions); err != nil {
+		log.Error("MailParticipants: %v", err)
+	}
+}
+
+func (m *mailNotifier) NotifyPullRequestReview(ctx context.Context, pr *issues_model.PullRequest, r *issues_model.Review, comment *issues_model.Comment, mentions []*user_model.User) {
+	var act activities_model.ActionType
+	if comment.Type == issues_model.CommentTypeClose {
+		act = activities_model.ActionCloseIssue
+	} else if comment.Type == issues_model.CommentTypeReopen {
+		act = activities_model.ActionReopenIssue
+	} else if comment.Type == issues_model.CommentTypeComment {
+		act = activities_model.ActionCommentPull
+	}
+	if err := MailParticipantsComment(ctx, comment, act, pr.Issue, mentions); err != nil {
+		log.Error("MailParticipantsComment: %v", err)
+	}
+}
+
+func (m *mailNotifier) NotifyPullRequestCodeComment(ctx context.Context, pr *issues_model.PullRequest, comment *issues_model.Comment, mentions []*user_model.User) {
+	if err := MailMentionsComment(ctx, pr, comment, mentions); err != nil {
+		log.Error("MailMentionsComment: %v", err)
+	}
+}
+
+func (m *mailNotifier) NotifyIssueChangeAssignee(ctx context.Context, doer *user_model.User, issue *issues_model.Issue, assignee *user_model.User, removed bool, comment *issues_model.Comment) {
+	// mail only sent to added assignees and not self-assignee
+	if !removed && doer.ID != assignee.ID && assignee.EmailNotifications() != user_model.EmailNotificationsDisabled {
+		ct := fmt.Sprintf("Assigned #%d.", issue.Index)
+		if err := SendIssueAssignedMail(ctx, issue, doer, ct, comment, []*user_model.User{assignee}); err != nil {
+			log.Error("Error in SendIssueAssignedMail for issue[%d] to assignee[%d]: %v", issue.ID, assignee.ID, err)
+		}
+	}
+}
+
+func (m *mailNotifier) NotifyPullRequestReviewRequest(ctx context.Context, doer *user_model.User, issue *issues_model.Issue, reviewer *user_model.User, isRequest bool, comment *issues_model.Comment) {
+	if isRequest && doer.ID != reviewer.ID && reviewer.EmailNotifications() != user_model.EmailNotificationsDisabled {
+		ct := fmt.Sprintf("Requested to review %s.", issue.HTMLURL())
+		if err := SendIssueAssignedMail(ctx, issue, doer, ct, comment, []*user_model.User{reviewer}); err != nil {
+			log.Error("Error in SendIssueAssignedMail for issue[%d] to reviewer[%d]: %v", issue.ID, reviewer.ID, err)
+		}
+	}
+}
+
+func (m *mailNotifier) NotifyMergePullRequest(ctx context.Context, doer *user_model.User, pr *issues_model.PullRequest) {
+	if err := pr.LoadIssue(ctx); err != nil {
+		log.Error("LoadIssue: %v", err)
+		return
+	}
+	if err := MailParticipants(ctx, pr.Issue, doer, activities_model.ActionMergePullRequest, nil); err != nil {
+		log.Error("MailParticipants: %v", err)
+	}
+}
+
+func (m *mailNotifier) NotifyAutoMergePullRequest(ctx context.Context, doer *user_model.User, pr *issues_model.PullRequest) {
+	if err := pr.LoadIssue(ctx); err != nil {
+		log.Error("pr.LoadIssue: %v", err)
+		return
+	}
+	if err := MailParticipants(ctx, pr.Issue, doer, activities_model.ActionAutoMergePullRequest, nil); err != nil {
+		log.Error("MailParticipants: %v", err)
+	}
+}
+
+func (m *mailNotifier) NotifyPullRequestPushCommits(ctx context.Context, doer *user_model.User, pr *issues_model.PullRequest, comment *issues_model.Comment) {
+	var err error
+	if err = comment.LoadIssue(ctx); err != nil {
+		log.Error("comment.LoadIssue: %v", err)
+		return
+	}
+	if err = comment.Issue.LoadRepo(ctx); err != nil {
+		log.Error("comment.Issue.LoadRepo: %v", err)
+		return
+	}
+	if err = comment.Issue.LoadPullRequest(ctx); err != nil {
+		log.Error("comment.Issue.LoadPullRequest: %v", err)
+		return
+	}
+	if err = comment.Issue.PullRequest.LoadBaseRepo(ctx); err != nil {
+		log.Error("comment.Issue.PullRequest.LoadBaseRepo: %v", err)
+		return
+	}
+	if err := comment.LoadPushCommits(ctx); err != nil {
+		log.Error("comment.LoadPushCommits: %v", err)
+	}
+	m.NotifyCreateIssueComment(ctx, doer, comment.Issue.Repo, comment.Issue, comment, nil)
+}
+
+func (m *mailNotifier) NotifyPullReviewDismiss(ctx context.Context, doer *user_model.User, review *issues_model.Review, comment *issues_model.Comment) {
+	if err := MailParticipantsComment(ctx, comment, activities_model.ActionPullReviewDismissed, review.Issue, nil); err != nil {
+		log.Error("MailParticipantsComment: %v", err)
+	}
+}
+
+func (m *mailNotifier) NotifyNewRelease(ctx context.Context, rel *repo_model.Release) {
+	if err := rel.LoadAttributes(ctx); err != nil {
+		log.Error("LoadAttributes: %v", err)
+		return
+	}
+
+	if rel.IsDraft || rel.IsPrerelease {
+		return
+	}
+
+	MailNewRelease(ctx, rel)
+}
+
+func (m *mailNotifier) NotifyRepoPendingTransfer(ctx context.Context, doer, newOwner *user_model.User, repo *repo_model.Repository) {
+	if err := SendRepoTransferNotifyMail(ctx, doer, newOwner, repo); err != nil {
+		log.Error("SendRepoTransferNotifyMail: %v", err)
+	}
+}