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>

1 files changed, 53 insertions, 0 deletions

diff --git a/modules/private/mail.go b/modules/private/mail.go
new file mode 100644
index 0000000000..db56009bb9
--- /dev/null
+++ b/modules/private/mail.go
@@ -0,0 +1,53 @@
+// 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 (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+
+	"code.gitea.io/gitea/modules/setting"
+)
+
+// Email structure holds a data for sending general emails
+type Email struct {
+	Subject string
+	Message string
+	To      []string
+}
+
+// SendEmail calls the internal SendEmail function
+//
+// It accepts a list of usernames.
+// If DB contains these users it will send the email to them.
+//
+// If to list == nil its supposed to send an email to every
+// user present in DB
+func SendEmail(subject, message string, to []string) (int, string) {
+	reqURL := setting.LocalURL + "api/internal/mail/send"
+
+	req := newInternalRequest(reqURL, "POST")
+	req = req.Header("Content-Type", "application/json")
+	jsonBytes, _ := json.Marshal(Email{
+		Subject: subject,
+		Message: message,
+		To:      to,
+	})
+	req.Body(jsonBytes)
+	resp, err := req.Response()
+	if err != nil {
+		return http.StatusInternalServerError, fmt.Sprintf("Unable to contact gitea: %v", err.Error())
+	}
+	defer resp.Body.Close()
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return http.StatusInternalServerError, fmt.Sprintf("Response body error: %v", err.Error())
+	}
+
+	return http.StatusOK, fmt.Sprintf("Was sent %s from %d", body, len(to))
+}