Mail: Cleanup old files from attachment stage (for anonymous user)

(cherry picked from commit 04f9348)

components/ILIAS/Mail/classes/class.ilMail.php

@@ -1141,6 +1141,16 @@ public function sendMail(
             $this->deleteMails([$internalMessageId]);
         }
 
+        if ($this->isSystemMail()) {
+            $random = new ilRandom();
+            if ($random->int(0, 50) === 2) {
+                (new ilMailAttachmentStageCleanup(
+                    $this->logger,
+                    $this->mfile
+                ))->run();
+            }
+        }
+
         return array_values($errors);
     }
 

components/ILIAS/Mail/classes/class.ilMailAttachmentStageCleanup.php

@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * This file is part of ILIAS, a powerful learning management system
+ * published by ILIAS open source e-Learning e.V.
+ *
+ * ILIAS is licensed with the GPL-3.0,
+ * see https://www.gnu.org/licenses/gpl-3.0.en.html
+ * You should have received a copy of said license along with the
+ * source code, too.
+ *
+ * If this is not the case or you just want to try ILIAS, you'll find
+ * us at:
+ * https://www.ilias.de
+ * https://github.com/ILIAS-eLearning
+ *
+ *********************************************************************/
+
+declare(strict_types=1);
+
+final class ilMailAttachmentStageCleanup
+{
+    private const OLD_FILE_MTIME_EXPRESSION = '1 day ago';
+
+    private ilLogger $logger;
+    private ilFileDataMail $mail_file_manager;
+
+    public function __construct(ilLogger $logger, ilFileDataMail $mail_file_manager)
+    {
+        $this->logger = $logger;
+        $this->mail_file_manager = $mail_file_manager;
+    }
+
+    public function run(): void
+    {
+        $right_interval = (new DateTimeImmutable(self::OLD_FILE_MTIME_EXPRESSION))->format('U');
+
+        $iter = new CallbackFilterIterator(
+            new RegexIterator(
+                new DirectoryIterator($this->mail_file_manager->getMailPath()),
+                '/^' . $this->mail_file_manager->user_id . '_/'
+            ),
+            function (SplFileInfo $file) use ($right_interval): bool {
+                if (!$file->isFile()) {
+                    return false;
+                }
+
+                return (int) $file->getMTime() < (int) $right_interval;
+            }
+        );
+
+        $filesystem = \ILIAS\Filesystem\Util\LegacyPathHelper::deriveFilesystemFrom(
+            $this->mail_file_manager->getMailPath()
+        );
+
+        foreach ($iter as $file) {
+            /** @var SplFileInfo $file */
+            if (strpos($file->getFilename(), $this->mail_file_manager->user_id . '_') === 0) {
+                try {
+                    $relative_path = 'mail/' . $file->getFilename();
+                    if ($filesystem->has($relative_path)) {
+                        $filesystem->delete($relative_path);
+                        $this->logger->info('Deleting file from attachment stage: ' . $file->getPath());
+                    }
+                } catch (Exception $e) {
+                    $this->logger->error('Error deleting file from attachment stage: ' . $file->getPath());
+                }
+            }
+        }
+    }
+}