1 files changed, 159 insertions, 0 deletions
diff --git a/services/mailer/mail_issue.go b/services/mailer/mail_issue.go
new file mode 100644
index 0000000000..92d2c5a879
--- /dev/null
+++ b/services/mailer/mail_issue.go
@@ -0,0 +1,159 @@
+// 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 mailer
+
+import (
+	"fmt"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/markup"
+	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/unknwon/com"
+)
+
+func mailSubject(issue *models.Issue) string {
+	return fmt.Sprintf("[%s] %s (#%d)", issue.Repo.FullName(), issue.Title, issue.Index)
+}
+
+// mailIssueCommentToParticipants can be used for both new issue creation and comment.
+// This function sends two list of emails:
+// 1. Repository watchers and users who are participated in comments.
+// 2. Users who are not in 1. but get mentioned in current issue/comment.
+func mailIssueCommentToParticipants(issue *models.Issue, doer *models.User, content string, comment *models.Comment, mentions []string) error {
+	if !setting.Service.EnableNotifyMail {
+		return nil
+	}
+
+	watchers, err := models.GetWatchers(issue.RepoID)
+	if err != nil {
+		return fmt.Errorf("getWatchers [repo_id: %d]: %v", issue.RepoID, err)
+	}
+	participants, err := models.GetParticipantsByIssueID(issue.ID)
+	if err != nil {
+		return fmt.Errorf("getParticipantsByIssueID [issue_id: %d]: %v", issue.ID, err)
+	}
+
+	// In case the issue poster is not watching the repository and is active,
+	// even if we have duplicated in watchers, can be safely filtered out.
+	err = issue.LoadPoster()
+	if err != nil {
+		return fmt.Errorf("GetUserByID [%d]: %v", issue.PosterID, err)
+	}
+	if issue.PosterID != doer.ID && issue.Poster.IsActive && !issue.Poster.ProhibitLogin {
+		participants = append(participants, issue.Poster)
+	}
+
+	// Assignees must receive any communications
+	assignees, err := models.GetAssigneesByIssue(issue)
+	if err != nil {
+		return err
+	}
+
+	for _, assignee := range assignees {
+		if assignee.ID != doer.ID {
+			participants = append(participants, assignee)
+		}
+	}
+
+	tos := make([]string, 0, len(watchers)) // List of email addresses.
+	names := make([]string, 0, len(watchers))
+	for i := range watchers {
+		if watchers[i].UserID == doer.ID {
+			continue
+		}
+
+		to, err := models.GetUserByID(watchers[i].UserID)
+		if err != nil {
+			return fmt.Errorf("GetUserByID [%d]: %v", watchers[i].UserID, err)
+		}
+		if to.IsOrganization() || to.EmailNotifications() != models.EmailNotificationsEnabled {
+			continue
+		}
+
+		tos = append(tos, to.Email)
+		names = append(names, to.Name)
+	}
+	for i := range participants {
+		if participants[i].ID == doer.ID ||
+			com.IsSliceContainsStr(names, participants[i].Name) ||
+			participants[i].EmailNotifications() != models.EmailNotificationsEnabled {
+			continue
+		}
+
+		tos = append(tos, participants[i].Email)
+		names = append(names, participants[i].Name)
+	}
+
+	if err := issue.LoadRepo(); err != nil {
+		return err
+	}
+
+	for _, to := range tos {
+		SendIssueCommentMail(issue, doer, content, comment, []string{to})
+	}
+
+	// Mail mentioned people and exclude watchers.
+	names = append(names, doer.Name)
+	tos = make([]string, 0, len(mentions)) // list of user names.
+	for i := range mentions {
+		if com.IsSliceContainsStr(names, mentions[i]) {
+			continue
+		}
+
+		tos = append(tos, mentions[i])
+	}
+
+	emails := models.GetUserEmailsByNames(tos)
+
+	for _, to := range emails {
+		SendIssueMentionMail(issue, doer, content, comment, []string{to})
+	}
+
+	return nil
+}
+
+// MailParticipants sends new issue thread created emails to repository watchers
+// and mentioned people.
+func MailParticipants(issue *models.Issue, doer *models.User, opType models.ActionType) error {
+	return mailParticipants(models.DefaultDBContext(), issue, doer, opType)
+}
+
+func mailParticipants(ctx models.DBContext, issue *models.Issue, doer *models.User, opType models.ActionType) (err error) {
+	mentions := markup.FindAllMentions(issue.Content)
+
+	if err = models.UpdateIssueMentions(ctx, issue.ID, mentions); err != nil {
+		return fmt.Errorf("UpdateIssueMentions [%d]: %v", issue.ID, err)
+	}
+
+	if len(issue.Content) > 0 {
+		if err = mailIssueCommentToParticipants(issue, doer, issue.Content, nil, mentions); err != nil {
+			log.Error("mailIssueCommentToParticipants: %v", err)
+		}
+	}
+
+	switch opType {
+	case models.ActionCreateIssue, models.ActionCreatePullRequest:
+		if len(issue.Content) == 0 {
+			ct := fmt.Sprintf("Created #%d.", issue.Index)
+			if err = mailIssueCommentToParticipants(issue, doer, ct, nil, mentions); err != nil {
+				log.Error("mailIssueCommentToParticipants: %v", err)
+			}
+		}
+	case models.ActionCloseIssue, models.ActionClosePullRequest:
+		ct := fmt.Sprintf("Closed #%d.", issue.Index)
+		if err = mailIssueCommentToParticipants(issue, doer, ct, nil, mentions); err != nil {
+			log.Error("mailIssueCommentToParticipants: %v", err)
+		}
+	case models.ActionReopenIssue, models.ActionReopenPullRequest:
+		ct := fmt.Sprintf("Reopened #%d.", issue.Index)
+		if err = mailIssueCommentToParticipants(issue, doer, ct, nil, mentions); err != nil {
+			log.Error("mailIssueCommentToParticipants: %v", err)
+		}
+	}
+
+	return nil
+}