1 files changed, 58 insertions, 0 deletions
diff --git a/lib/private/Command/QueueBus.php b/lib/private/Command/QueueBus.php
new file mode 100644
index 00000000000..ed7d43b38b6
--- /dev/null
+++ b/lib/private/Command/QueueBus.php
@@ -0,0 +1,58 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+namespace OC\Command;
+
+use OCP\Command\IBus;
+use OCP\Command\ICommand;
+
+class QueueBus implements IBus {
+	/**
+	 * @var ICommand[]|callable[]
+	 */
+	private $queue = [];
+
+	/**
+	 * Schedule a command to be fired
+	 *
+	 * @param \OCP\Command\ICommand | callable $command
+	 */
+	public function push($command) {
+		$this->queue[] = $command;
+	}
+
+	/**
+	 * Require all commands using a trait to be run synchronous
+	 *
+	 * @param string $trait
+	 */
+	public function requireSync($trait) {
+	}
+
+	/**
+	 * @param \OCP\Command\ICommand | callable $command
+	 */
+	private function runCommand($command) {
+		if ($command instanceof ICommand) {
+			// ensure the command can be serialized
+			$serialized = serialize($command);
+			if (strlen($serialized) > 4000) {
+				throw new \InvalidArgumentException('Trying to push a command which serialized form can not be stored in the database (>4000 character)');
+			}
+			$unserialized = unserialize($serialized);
+			$unserialized->handle();
+		} else {
+			$command();
+		}
+	}
+
+	public function run() {
+		while ($command = array_shift($this->queue)) {
+			$this->runCommand($command);
+		}
+	}
+}