Add async command system to handle asynchronous operations

1 files changed, 70 insertions, 0 deletions

diff --git a/lib/private/command/asyncbus.php b/lib/private/command/asyncbus.php
new file mode 100644
index 00000000000..fc9c85acc3f
--- /dev/null
+++ b/lib/private/command/asyncbus.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * Copyright (c) 2015 Robin Appelman <icewind@owncloud.com>
+ * This file is licensed under the Affero General Public License version 3 or
+ * later.
+ * See the COPYING-README file.
+ */
+
+namespace OC\Command;
+
+use OCP\Command\IBus;
+use OCP\Command\ICommand;
+use SuperClosure\Serializer;
+
+/**
+ * Asynchronous command bus that uses the background job system as backend
+ */
+class AsyncBus implements IBus {
+	/**
+	 * @var \OCP\BackgroundJob\IJobList
+	 */
+	private $jobList;
+
+	/**
+	 * @param \OCP\BackgroundJob\IJobList $jobList
+	 */
+	function __construct($jobList) {
+		$this->jobList = $jobList;
+	}
+
+	/**
+	 * Schedule a command to be fired
+	 *
+	 * @param \OCP\Command\ICommand | callable $command
+	 */
+	public function push($command) {
+		$this->jobList->add($this->getJobClass($command), $this->serializeCommand($command));
+	}
+
+	/**
+	 * @param \OCP\Command\ICommand | callable $command
+	 * @return string
+	 */
+	private function getJobClass($command) {
+		if ($command instanceof \Closure) {
+			return 'OC\Command\ClosureJob';
+		} else if (is_callable($command)) {
+			return 'OC\Command\CallableJob';
+		} else if ($command instanceof ICommand) {
+			return 'OC\Command\CommandJob';
+		} else {
+			throw new \InvalidArgumentException('Invalid command');
+		}
+	}
+
+	/**
+	 * @param \OCP\Command\ICommand | callable $command
+	 * @return string
+	 */
+	private function serializeCommand($command) {
+		if ($command instanceof \Closure) {
+			$serializer = new Serializer();
+			return $serializer->serialize($command);
+		} else if (is_callable($command) or $command instanceof ICommand) {
+			return serialize($command);
+		} else {
+			throw new \InvalidArgumentException('Invalid command');
+		}
+	}
+}