Merge pull request #35876 from bennet0496/patch-mail-header

Adding option to set Auto-Submitted email header

2 files changed, 85 insertions, 0 deletions

diff --git a/lib/public/Mail/Headers/AutoSubmitted.php b/lib/public/Mail/Headers/AutoSubmitted.php
new file mode 100644
index 00000000000..21df18dd918
--- /dev/null
+++ b/lib/public/Mail/Headers/AutoSubmitted.php
@@ -0,0 +1,75 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright Copyright (c) 2022 Bennet Becker <dev@bennet.cc>
+ *
+ * @author Bennet Becker <dev@bennet.cc>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * 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/>.
+ *
+ */
+namespace OCP\Mail\Headers;
+
+/**
+ * Keyword values for the Auto-Submitted email header, as per RFC 3834.
+ *
+ * The value "auto-notified" as per RFC 5436 is deliberately omitted as it is
+ * meant of notification of the sieve system.
+ *
+ * @link https://www.iana.org/assignments/auto-submitted-keywords/auto-submitted-keywords.xhtml
+ *
+ * @since 26.0.0
+ */
+final class AutoSubmitted {
+
+	/**
+	 * Name of the Header as used in the final message later
+	 *
+	 * @var string
+	 * @since 26.0.0
+	 */
+	public const HEADER = 'Auto-Submitted';
+
+	/**
+	 * Indicates that a message was NOT automatically generated, but was
+	 * created by a human (or following human interaction). It is the equivalent
+	 * to the absence of an Auto-Submitted header altogether.
+	 *
+	 * @var string
+	 * @since 26.0.0
+	 */
+	public const VALUE_NO = 'no';
+
+	/**
+	 * Indicates that a message was generated by an automatic process, and is
+	 * not a direct response to another message
+	 *
+	 * @var string
+	 * @since 26.0.0
+	 */
+	public const VALUE_AUTO_GENERATED = 'auto-generated';
+
+	/**
+	 * Indicates that a message was automatically generated as a direct response
+	 * to another message.
+	 *
+	 * @var string
+	 * @since 26.0.0
+	 */
+	public const VALUE_AUTO_REPLIED = 'auto-replied';
+}
diff --git a/lib/public/Mail/IMessage.php b/lib/public/Mail/IMessage.php
index 1549f61c1fe..994d32603e9 100644
--- a/lib/public/Mail/IMessage.php
+++ b/lib/public/Mail/IMessage.php
@@ -93,4 +93,14 @@ interface IMessage {
 	 * @since 13.0.0
 	 */
 	public function useTemplate(IEMailTemplate $emailTemplate): IMessage;
+
+	/**
+	 * Add the Auto-Submitted header to the email, preventing most automated
+	 * responses to automated messages.
+	 *
+	 * @param Headers\AutoSubmitted::VALUE_* $value (one of AutoSubmitted::VALUE_NO, AutoSubmitted::VALUE_AUTO_GENERATED, AutoSubmitted::VALUE_AUTO_REPLIED)
+	 * @return IMessage
+	 * @since 26.0.0
+	 */
+	public function setAutoSubmitted(string $value): IMessage;
 }