Dispatch events when adding, updating and deleting comments

4 files changed, 116 insertions, 7 deletions

diff --git a/lib/private/comments/manager.php b/lib/private/comments/manager.php
index 0cacc1cce71..21baeb6fee3 100644
--- a/lib/private/comments/manager.php
+++ b/lib/private/comments/manager.php
@@ -21,6 +21,7 @@
 namespace OC\Comments;
 
 use Doctrine\DBAL\Exception\DriverException;
+use OCP\Comments\CommentsEvent;
 use OCP\Comments\IComment;
 use OCP\Comments\ICommentsManager;
 use OCP\Comments\NotFoundException;
@@ -28,6 +29,7 @@ use OCP\IDBConnection;
 use OCP\IConfig;
 use OCP\ILogger;
 use OCP\IUser;
+use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
 class Manager implements ICommentsManager {
 
@@ -37,20 +39,33 @@ class Manager implements ICommentsManager {
 	/** @var  ILogger */
 	protected $logger;
 
-	/** @var IComment[]  */
-	protected $commentsCache = [];
-
 	/** @var IConfig */
 	protected $config;
 
+	/** @var EventDispatcherInterface */
+	protected $dispatcher;
+
+	/** @var IComment[]  */
+	protected $commentsCache = [];
+
+	/**
+	 * Manager constructor.
+	 *
+	 * @param IDBConnection $dbConn
+	 * @param ILogger $logger
+	 * @param IConfig $config
+	 * @param EventDispatcherInterface $dispatcher
+	 */
 	public function __construct(
 		IDBConnection $dbConn,
 		ILogger $logger,
-		IConfig $config
+		IConfig $config,
+		EventDispatcherInterface $dispatcher
 	) {
 		$this->dbConn = $dbConn;
 		$this->logger = $logger;
 		$this->config = $config;
+		$this->dispatcher = $dispatcher;
 	}
 
 	/**
@@ -415,6 +430,19 @@ class Manager implements ICommentsManager {
 			throw new \InvalidArgumentException('Parameter must be string');
 		}
 
+		try {
+			$comment = $this->get($id);
+		} catch (\Exception $e) {
+			// Ignore exceptions, we just don't fire a hook then
+			$comment = null;
+		}
+		if ($comment instanceof IComment) {
+			$this->dispatcher->dispatch(CommentsEvent::EVENT_DELETE, new CommentsEvent(
+				CommentsEvent::EVENT_DELETE,
+				$comment
+			));
+		}
+
 		$qb = $this->dbConn->getQueryBuilder();
 		$query = $qb->delete('comments')
 			->where($qb->expr()->eq('id', $qb->createParameter('id')))
@@ -431,7 +459,7 @@ class Manager implements ICommentsManager {
 	}
 
 	/**
-	 * saves the comment permanently and returns it
+	 * saves the comment permanently
 	 *
 	 * if the supplied comment has an empty ID, a new entry comment will be
 	 * saved and the instance updated with the new ID.
@@ -493,6 +521,11 @@ class Manager implements ICommentsManager {
 			$comment->setId(strval($qb->getLastInsertId()));
 		}
 
+		$this->dispatcher->dispatch(CommentsEvent::EVENT_ADD, new CommentsEvent(
+			CommentsEvent::EVENT_ADD,
+			$comment
+		));
+
 		return $affectedRows > 0;
 	}
 
@@ -526,6 +559,11 @@ class Manager implements ICommentsManager {
 			throw new NotFoundException('Comment to update does ceased to exist');
 		}
 
+		$this->dispatcher->dispatch(CommentsEvent::EVENT_UPDATE, new CommentsEvent(
+			CommentsEvent::EVENT_UPDATE,
+			$comment
+		));
+
 		return $affectedRows > 0;
 	}
 
diff --git a/lib/private/comments/managerfactory.php b/lib/private/comments/managerfactory.php
index d3f6c44e539..b8e77c64fae 100644
--- a/lib/private/comments/managerfactory.php
+++ b/lib/private/comments/managerfactory.php
@@ -52,7 +52,8 @@ class ManagerFactory implements ICommentsManagerFactory {
 		return new Manager(
 			$this->serverContainer->getDatabaseConnection(),
 			$this->serverContainer->getLogger(),
-			$this->serverContainer->getConfig()
+			$this->serverContainer->getConfig(),
+			$this->serverContainer->getEventDispatcher()
 		);
 	}
 }
diff --git a/lib/public/comments/commentsevent.php b/lib/public/comments/commentsevent.php
new file mode 100644
index 00000000000..13110154479
--- /dev/null
+++ b/lib/public/comments/commentsevent.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCP\Comments;
+
+use Symfony\Component\EventDispatcher\Event;
+
+/**
+ * Class CommentsEvent
+ *
+ * @package OCP\Comments
+ * @since 9.0.0
+ */
+class CommentsEvent extends Event {
+
+	const EVENT_ADD = 'OCP\Comments\ICommentsManager::addComment';
+	const EVENT_UPDATE = 'OCP\Comments\ICommentsManager::updateComment';
+	const EVENT_DELETE = 'OCP\Comments\ICommentsManager::deleteComment';
+
+	/** @var string */
+	protected $event;
+	/** @var IComment */
+	protected $comment;
+
+	/**
+	 * DispatcherEvent constructor.
+	 *
+	 * @param string $event
+	 * @param IComment $comment
+	 * @since 9.0.IComment
+	 */
+	public function __construct($event, IComment $comment) {
+		$this->event = $event;
+		$this->comment = $comment;
+	}
+
+	/**
+	 * @return string
+	 * @since 9.0.0
+	 */
+	public function getEvent() {
+		return $this->event;
+	}
+
+	/**
+	 * @return IComment
+	 * @since 9.0.0
+	 */
+	public function getComment() {
+		return $this->comment;
+	}
+}
diff --git a/lib/public/comments/icommentsmanager.php b/lib/public/comments/icommentsmanager.php
index 46608ca8165..0b37fde24d8 100644
--- a/lib/public/comments/icommentsmanager.php
+++ b/lib/public/comments/icommentsmanager.php
@@ -149,7 +149,7 @@ interface ICommentsManager {
 	public function delete($id);
 
 	/**
-	 * saves the comment permanently and returns it
+	 * saves the comment permanently
 	 *
 	 * if the supplied comment has an empty ID, a new entry comment will be
 	 * saved and the instance updated with the new ID.