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[feature] Email notifications for new / closed moderation reports (#1628
) * start fiddling about with email sending to allow multiple recipients * do some fiddling * notifs working * notify on closed report * finishing up * envparsing * use strings.ContainsAny
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,112 @@ | ||
| // GoToSocial | ||
| // Copyright (C) GoToSocial Authors admin@gotosocial.org | ||
| // SPDX-License-Identifier: AGPL-3.0-or-later | ||
| // | ||
| // This program is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Affero General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Affero General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Affero General Public License | ||
| // along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
|
|
||
| package email | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "errors" | ||
| "fmt" | ||
| "net/smtp" | ||
| "os" | ||
| "path/filepath" | ||
| "strings" | ||
| "text/template" | ||
|
|
||
| "github.com/superseriousbusiness/gotosocial/internal/config" | ||
| "github.com/superseriousbusiness/gotosocial/internal/gtserror" | ||
| ) | ||
|
|
||
| func (s *sender) sendTemplate(template string, subject string, data any, toAddresses ...string) error { | ||
| buf := &bytes.Buffer{} | ||
| if err := s.template.ExecuteTemplate(buf, template, data); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| msg, err := assembleMessage(subject, buf.String(), s.from, toAddresses...) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if err := smtp.SendMail(s.hostAddress, s.auth, s.from, toAddresses, msg); err != nil { | ||
| return gtserror.SetType(err, gtserror.TypeSMTP) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func loadTemplates(templateBaseDir string) (*template.Template, error) { | ||
| if !filepath.IsAbs(templateBaseDir) { | ||
| cwd, err := os.Getwd() | ||
| if err != nil { | ||
| return nil, fmt.Errorf("error getting current working directory: %s", err) | ||
| } | ||
| templateBaseDir = filepath.Join(cwd, templateBaseDir) | ||
| } | ||
|
|
||
| // look for all templates that start with 'email_' | ||
| return template.ParseGlob(filepath.Join(templateBaseDir, "email_*")) | ||
| } | ||
|
|
||
| // assembleMessage assembles a valid email message following: | ||
| // - https://datatracker.ietf.org/doc/html/rfc2822 | ||
| // - https://pkg.go.dev/net/smtp#SendMail | ||
| func assembleMessage(mailSubject string, mailBody string, mailFrom string, mailTo ...string) ([]byte, error) { | ||
| if strings.ContainsAny(mailSubject, "\r\n") { | ||
| return nil, errors.New("email subject must not contain newline characters") | ||
| } | ||
|
|
||
| if strings.ContainsAny(mailFrom, "\r\n") { | ||
| return nil, errors.New("email from address must not contain newline characters") | ||
| } | ||
|
|
||
| for _, to := range mailTo { | ||
| if strings.ContainsAny(to, "\r\n") { | ||
| return nil, errors.New("email to address must not contain newline characters") | ||
| } | ||
| } | ||
|
|
||
| // Normalize the message body to use CRLF line endings | ||
| const CRLF = "\r\n" | ||
| mailBody = strings.ReplaceAll(mailBody, CRLF, "\n") | ||
| mailBody = strings.ReplaceAll(mailBody, "\n", CRLF) | ||
|
|
||
| msg := bytes.Buffer{} | ||
| switch { | ||
| case len(mailTo) == 1: | ||
| // Address email directly to the one recipient. | ||
| msg.WriteString("To: " + mailTo[0] + CRLF) | ||
| case config.GetSMTPDiscloseRecipients(): | ||
| // Simply address To all recipients. | ||
| msg.WriteString("To: " + strings.Join(mailTo, ", ") + CRLF) | ||
| default: | ||
| // Address To anonymous group. | ||
| // | ||
| // Email will be sent to all recipients but we shouldn't include Bcc header. | ||
| // | ||
| // From the smtp.SendMail function: 'Sending "Bcc" messages is accomplished by | ||
| // including an email address in the to parameter but not including it in the | ||
| // msg headers.' | ||
| msg.WriteString("To: Undisclosed Recipients:;" + CRLF) | ||
| } | ||
| msg.WriteString("Subject: " + mailSubject + CRLF) | ||
| msg.WriteString(CRLF) | ||
| msg.WriteString(mailBody) | ||
| msg.WriteString(CRLF) | ||
|
|
||
| return msg.Bytes(), nil | ||
| } |
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this line probably should be updated for 0.16