Sendmail command (#13079)

* Add SendSync method

Usefull to have when you need to be confident that message was sent.

* Add sendmail command

* add checks that if either title or content is empty then error out

* Add a confirmation step

* Add --force option to bypass confirm step

* Move implementation of runSendMail to a different file

* Add copyrighting comment

* Make content optional

Print waring if it's empty or haven't been set up.
The warning will be skiped if there's a `--force` flag.

* Fix import style

Co-authored-by: 6543 <6543@obermui.de>

* Use batch when getting all users

IterateUsers uses batching by default.

Signed-off-by: Maxim Zhiburt <zhiburt@gmail.com>

* Send emails one by one instead of as one chunck

Signed-off-by: Maxim Zhiburt <zhiburt@gmail.com>

* Send messages concurantly

Signed-off-by: Maxim Zhiburt <zhiburt@gmail.com>

* Use SendAsync+Flush instead of SendSync

Signed-off-by: Maxim Zhiburt <zhiburt@gmail.com>

* Add timeout parameter to sendemail command

Signed-off-by: Maxim Zhiburt <zhiburt@gmail.com>

* Fix spelling mistake

Signed-off-by: Maxim Zhiburt <zhiburt@gmail.com>

* Update cmd/admin.go

Co-authored-by: 6543 <6543@obermui.de>

* Connect to a running Gitea instance

* Fix mispelling

* Add copyright comment

Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

2 files changed, 68 insertions, 0 deletions

diff --git a/routers/private/internal.go b/routers/private/internal.go
index 821cf62a61..4fb267a49a 100644
--- a/routers/private/internal.go
+++ b/routers/private/internal.go
@@ -47,5 +47,6 @@ func RegisterRoutes(m *macaron.Macaron) {
 		m.Post("/manager/release-and-reopen-logging", ReleaseReopenLogging)
 		m.Post("/manager/add-logger", bind(private.LoggerOptions{}), AddLogger)
 		m.Post("/manager/remove-logger/:group/:name", RemoveLogger)
+		m.Post("/mail/send", SendEmail)
 	}, CheckInternalToken)
 }
diff --git a/routers/private/mail.go b/routers/private/mail.go
new file mode 100644
index 0000000000..8d09752487
--- /dev/null
+++ b/routers/private/mail.go
@@ -0,0 +1,67 @@
+// Copyright 2020 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 private
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/private"
+	"code.gitea.io/gitea/services/mailer"
+	"gitea.com/macaron/macaron"
+)
+
+// SendEmail pushes messages to mail queue
+//
+// It doesn't wait before each message will be processed
+func SendEmail(ctx *macaron.Context, mail private.Email) {
+	var emails []string
+	if len(mail.To) > 0 {
+		for _, uname := range mail.To {
+			user, err := models.GetUserByName(uname)
+			if err != nil {
+				err := fmt.Sprintf("Failed to get user information: %v", err)
+				log.Error(err)
+				ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
+					"err": err,
+				})
+				return
+			}
+
+			if user != nil {
+				emails = append(emails, user.Email)
+			}
+		}
+	} else {
+		err := models.IterateUser(func(user *models.User) error {
+			emails = append(emails, user.Email)
+			return nil
+		})
+		if err != nil {
+			err := fmt.Sprintf("Failed to find users: %v", err)
+			log.Error(err)
+			ctx.JSON(http.StatusInternalServerError, map[string]interface{}{
+				"err": err,
+			})
+			return
+		}
+	}
+
+	sendEmail(ctx, mail.Subject, mail.Message, emails)
+}
+
+func sendEmail(ctx *macaron.Context, subject, message string, to []string) {
+	for _, email := range to {
+		msg := mailer.NewMessage([]string{email}, subject, message)
+		mailer.SendAsync(msg)
+	}
+
+	wasSent := strconv.Itoa(len(to))
+
+	ctx.PlainText(http.StatusOK, []byte(wasSent))
+}