12 files changed, 575 insertions, 137 deletions
diff --git a/phpBB/phpbb/feed/controller/feed.php b/phpBB/phpbb/feed/controller/feed.php
new file mode 100644
index 0000000000..a2dd9393f6
--- /dev/null
+++ b/phpBB/phpbb/feed/controller/feed.php
@@ -0,0 +1,387 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\feed\controller;
+
+use phpbb\auth\auth;
+use phpbb\config\config;
+use phpbb\db\driver\driver_interface;
+use phpbb\exception\http_exception;
+use phpbb\feed\base;
+use phpbb\feed\exception\feed_unavailable_exception;
+use phpbb\feed\exception\unauthorized_exception;
+use phpbb\feed\helper as feed_helper;
+use phpbb\controller\helper as controller_helper;
+use phpbb\symfony_request;
+use phpbb\user;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
+
+class feed
+{
+	/**
+	 * @var \Twig_Environment
+	 */
+	protected $template;
+
+	/**
+	 * @var symfony_request
+	 */
+	protected $request;
+
+	/**
+	 * @var controller_helper
+	 */
+	protected $controller_helper;
+
+	/**
+	 * @var config
+	 */
+	protected $config;
+
+	/**
+	 * @var driver_interface
+	 */
+	protected $db;
+
+	/**
+	 * @var ContainerInterface
+	 */
+	protected $container;
+
+	/**
+	 * @var feed_helper
+	 */
+	protected $feed_helper;
+
+	/**
+	 * @var user
+	 */
+	protected $user;
+
+	/**
+	 * @var auth
+	 */
+	protected $auth;
+
+	/**
+	 * @var string
+	 */
+	protected $php_ext;
+
+	/**
+	 * Constructor
+	 *
+	 * @param symfony_request $request;
+	 * @param controller_helper $controller_helper
+	 * @param config $config
+	 * @param driver_interface $db
+	 * @param ContainerInterface $container
+	 * @param feed_helper $feed_helper
+	 * @param user $user
+	 * @param auth $auth
+	 */
+	public function __construct(\Twig_Environment $twig, symfony_request $request, controller_helper $controller_helper, config $config, driver_interface $db, ContainerInterface $container, feed_helper $feed_helper, user $user, auth $auth, $php_ext)
+	{
+		$this->request = $request;
+		$this->controller_helper = $controller_helper;
+		$this->config = $config;
+		$this->db = $db;
+		$this->container = $container;
+		$this->feed_helper = $feed_helper;
+		$this->user = $user;
+		$this->auth = $auth;
+		$this->php_ext = $php_ext;
+		$this->template = $twig;
+	}
+
+	/**
+	 * Controller for /feed/forums route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function forums()
+	{
+		if (!$this->config['feed_overall_forums'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.forums'));
+	}
+
+	/**
+	 * Controller for /feed/news route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function news()
+	{
+		// Get at least one news forum
+		$sql = 'SELECT forum_id
+					FROM ' . FORUMS_TABLE . '
+					WHERE ' . $this->db->sql_bit_and('forum_options', FORUM_OPTION_FEED_NEWS, '<> 0');
+		$result = $this->db->sql_query_limit($sql, 1, 0, 600);
+		$s_feed_news = (int) $this->db->sql_fetchfield('forum_id');
+		$this->db->sql_freeresult($result);
+
+		if (!$s_feed_news)
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.news'));
+	}
+
+	/**
+	 * Controller for /feed/topics route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function topics()
+	{
+		if (!$this->config['feed_topics_new'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.topics'));
+	}
+
+	/**
+	 * Controller for /feed/topics_new route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function topics_new()
+	{
+		return $this->topics();
+	}
+
+	/**
+	 * Controller for /feed/topics_active route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function topics_active()
+	{
+		if (!$this->config['feed_topics_active'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.topics_active'));
+	}
+
+	/**
+	 * Controller for /feed/forum/{forum_id} route
+	 *
+	 * @param int $forum_id
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function forum($forum_id)
+	{
+		if (!$this->config['feed_forum'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.forum')->set_forum_id($forum_id));
+	}
+
+	/**
+	 * Controller for /feed/topic/{topic_id} route
+	 *
+	 * @param int $topic_id
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function topic($topic_id)
+	{
+		if (!$this->config['feed_topic'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.topic')->set_topic_id($topic_id));
+	}
+
+	/**
+	 * Controller for /feed/{mode] route
+	 *
+	 * @return Response
+	 *
+	 * @throws http_exception when the feed is disabled
+	 */
+	public function overall()
+	{
+		if (!$this->config['feed_overall'])
+		{
+			$this->send_unavailable();
+		}
+
+		return $this->send_feed($this->container->get('feed.overall'));
+	}
+
+	/**
+	 * Display a given feed
+	 *
+	 * @param base $feed
+	 *
+	 * @return Response
+	 */
+	protected function send_feed(base $feed)
+	{
+		try
+		{
+			return $this->send_feed_do($feed);
+		}
+		catch (feed_unavailable_exception $e)
+		{
+			throw new http_exception(Response::HTTP_NOT_FOUND, $e->getMessage(), $e->get_parameters(), $e);
+		}
+		catch (unauthorized_exception $e)
+		{
+			throw new http_exception(Response::HTTP_FORBIDDEN, $e->getMessage(), $e->get_parameters(), $e);
+		}
+	}
+
+	/**
+	 * Really send the feed
+	 *
+	 * @param base $feed
+	 *
+	 * @return Response
+	 *
+	 * @throw exception\feed_exception
+	 */
+	protected function send_feed_do(base $feed)
+	{
+		$feed_updated_time = 0;
+		$item_vars = array();
+
+		$board_url = $this->feed_helper->get_board_url();
+
+		// Open Feed
+		$feed->open();
+
+		// Iterate through items
+		while ($row = $feed->get_item())
+		{
+			// BBCode options to correctly disable urls, smilies, bbcode...
+			if ($feed->get('options') === null)
+			{
+				// Allow all combinations
+				$options = 7;
+
+				if ($feed->get('enable_bbcode') !== null && $feed->get('enable_smilies') !== null && $feed->get('enable_magic_url') !== null)
+				{
+					$options = (($row[$feed->get('enable_bbcode')]) ? OPTION_FLAG_BBCODE : 0) + (($row[$feed->get('enable_smilies')]) ? OPTION_FLAG_SMILIES : 0) + (($row[$feed->get('enable_magic_url')]) ? OPTION_FLAG_LINKS : 0);
+				}
+			}
+			else
+			{
+				$options = $row[$feed->get('options')];
+			}
+
+			$title = (isset($row[$feed->get('title')]) && $row[$feed->get('title')] !== '') ? $row[$feed->get('title')] : ((isset($row[$feed->get('title2')])) ? $row[$feed->get('title2')] : '');
+
+			$published = ($feed->get('published') !== null) ? (int) $row[$feed->get('published')] : 0;
+			$updated = ($feed->get('updated') !== null) ? (int) $row[$feed->get('updated')] : 0;
+
+			$display_attachments = ($this->auth->acl_get('u_download') && $this->auth->acl_get('f_download', $row['forum_id']) && isset($row['post_attachment']) && $row['post_attachment']) ? true : false;
+
+			$item_row = array(
+				'author'		=> ($feed->get('creator') !== null) ? $row[$feed->get('creator')] : '',
+				'published'		=> ($published > 0) ? $this->feed_helper->format_date($published) : '',
+				'updated'		=> ($updated > 0) ? $this->feed_helper->format_date($updated) : '',
+				'link'			=> '',
+				'title'			=> censor_text($title),
+				'category'		=> ($this->config['feed_item_statistics'] && !empty($row['forum_id'])) ? $board_url . '/viewforum.' . $this->php_ext . '?f=' . $row['forum_id'] : '',
+				'category_name'	=> ($this->config['feed_item_statistics'] && isset($row['forum_name'])) ? $row['forum_name'] : '',
+				'description'	=> censor_text($this->feed_helper->generate_content($row[$feed->get('text')], $row[$feed->get('bbcode_uid')], $row[$feed->get('bitfield')], $options, $row['forum_id'], ($display_attachments ? $feed->get_attachments($row['post_id']) : array()))),
+				'statistics'	=> '',
+			);
+
+			// Adjust items, fill link, etc.
+			$feed->adjust_item($item_row, $row);
+
+			$item_vars[] = $item_row;
+
+			$feed_updated_time = max($feed_updated_time, $published, $updated);
+		}
+
+		// If we do not have any items at all, sending the current time is better than sending no time.
+		if (!$feed_updated_time)
+		{
+			$feed_updated_time = time();
+		}
+
+		$feed->close();
+
+		$content = $this->template->render('feed.xml.twig', array(
+			// Some default assignments
+			// FEED_IMAGE is not used (atom)
+			'FEED_IMAGE'			=> '',
+			'SELF_LINK'				=> $this->controller_helper->route($this->request->attributes->get('_route'), $this->request->attributes->get('_route_params'), true, '', UrlGeneratorInterface::ABSOLUTE_URL),
+			'FEED_LINK'				=> $board_url . '/index.' . $this->php_ext,
+			'FEED_TITLE'			=> $this->config['sitename'],
+			'FEED_SUBTITLE'			=> $this->config['site_desc'],
+			'FEED_UPDATED'			=> $this->feed_helper->format_date($feed_updated_time),
+			'FEED_LANG'				=> $this->user->lang['USER_LANG'],
+			'FEED_AUTHOR'			=> $this->config['sitename'],
+
+			// Feed entries
+			'FEED_ROWS'				=> $item_vars,
+		));
+
+		$response = new Response($content);
+		$response->headers->set('Content-Type', 'application/atom+xml');
+		$response->setCharset('UTF-8');
+		$response->setLastModified(new \DateTime('@' . $feed_updated_time));
+
+		if (!empty($this->user->data['is_bot']))
+		{
+			// Let reverse proxies know we detected a bot.
+			$response->headers->set('X-PHPBB-IS-BOT', 'yes');
+		}
+
+		return $response;
+	}
+
+	/**
+	 * Throw and exception saying that the feed isn't available
+	 *
+	 * @throw http_exception
+	 */
+	protected function send_unavailable()
+	{
+		throw new http_exception(404, 'FEATURE_NOT_AVAILABLE');
+	}
+}
diff --git a/phpBB/phpbb/feed/exception/feed_exception.php b/phpBB/phpbb/feed/exception/feed_exception.php
new file mode 100644
index 0000000000..c9c888211e
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/feed_exception.php
@@ -0,0 +1,21 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+use phpbb\exception\runtime_exception;
+
+abstract class feed_exception extends runtime_exception
+{
+
+}
diff --git a/phpBB/phpbb/feed/exception/feed_unavailable_exception.php b/phpBB/phpbb/feed/exception/feed_unavailable_exception.php
new file mode 100644
index 0000000000..4b6605b47d
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/feed_unavailable_exception.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+abstract class feed_unavailable_exception extends feed_exception
+{
+
+}
diff --git a/phpBB/phpbb/feed/exception/no_feed_exception.php b/phpBB/phpbb/feed/exception/no_feed_exception.php
new file mode 100644
index 0000000000..af6357b74c
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/no_feed_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+class no_feed_exception extends feed_unavailable_exception
+{
+	public function __construct(\Exception $previous = null, $code = 0)
+	{
+		parent::__construct('NO_FEED', array(), $previous, $code);
+	}
+}
diff --git a/phpBB/phpbb/feed/exception/no_forum_exception.php b/phpBB/phpbb/feed/exception/no_forum_exception.php
new file mode 100644
index 0000000000..a60832957a
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/no_forum_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+class no_forum_exception extends feed_unavailable_exception
+{
+	public function __construct($forum_id, \Exception $previous = null, $code = 0)
+	{
+		parent::__construct('NO_FORUM', array($forum_id), $previous, $code);
+	}
+}
diff --git a/phpBB/phpbb/feed/exception/no_topic_exception.php b/phpBB/phpbb/feed/exception/no_topic_exception.php
new file mode 100644
index 0000000000..b961a65d1c
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/no_topic_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+class no_topic_exception extends feed_unavailable_exception
+{
+	public function __construct($topic_id, \Exception $previous = null, $code = 0)
+	{
+		parent::__construct('NO_TOPIC', array($topic_id), $previous, $code);
+	}
+}
diff --git a/phpBB/phpbb/feed/exception/unauthorized_exception.php b/phpBB/phpbb/feed/exception/unauthorized_exception.php
new file mode 100644
index 0000000000..7868975779
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/unauthorized_exception.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+abstract class unauthorized_exception extends feed_exception
+{
+
+}
diff --git a/phpBB/phpbb/feed/exception/unauthorized_forum_exception.php b/phpBB/phpbb/feed/exception/unauthorized_forum_exception.php
new file mode 100644
index 0000000000..4384c7b39b
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/unauthorized_forum_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+class unauthorized_forum_exception extends unauthorized_exception
+{
+	public function __construct($forum_id, \Exception $previous = null, $code = 0)
+	{
+		parent::__construct('SORRY_AUTH_READ', array($forum_id), $previous, $code);
+	}
+}
diff --git a/phpBB/phpbb/feed/exception/unauthorized_topic_exception.php b/phpBB/phpbb/feed/exception/unauthorized_topic_exception.php
new file mode 100644
index 0000000000..f49f0a0476
--- /dev/null
+++ b/phpBB/phpbb/feed/exception/unauthorized_topic_exception.php
@@ -0,0 +1,22 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\feed\exception;
+
+class unauthorized_topic_exception extends unauthorized_exception
+{
+	public function __construct($topic_id, \Exception $previous = null, $code = 0)
+	{
+		parent::__construct('SORRY_AUTH_READ_TOPIC', array($topic_id), $previous, $code);
+	}
+}
diff --git a/phpBB/phpbb/feed/factory.php b/phpBB/phpbb/feed/factory.php
deleted file mode 100644
index f364f06d03..0000000000
--- a/phpBB/phpbb/feed/factory.php
+++ /dev/null
@@ -1,127 +0,0 @@
-<?php
-/**
-*
-* This file is part of the phpBB Forum Software package.
-*
-* @copyright (c) phpBB Limited <https://www.phpbb.com>
-* @license GNU General Public License, version 2 (GPL-2.0)
-*
-* For full copyright and license information, please see
-* the docs/CREDITS.txt file.
-*
-*/
-
-namespace phpbb\feed;
-
-use Symfony\Component\DependencyInjection\ContainerInterface;
-
-/**
-* Factory class to return correct object
-*/
-class factory
-{
-	/**
-	* Service container object
-	* @var ContainerInterface
-	*/
-	protected $container;
-
-	/** @var \phpbb\config\config */
-	protected $config;
-
-	/** @var \phpbb\db\driver\driver_interface */
-	protected $db;
-
-	/**
-	* Constructor
-	*
-	* @param ContainerInterface					$container	Container object
-	* @param \phpbb\config\config				$config		Config object
-	* @param \phpbb\db\driver\driver_interface	$db			Database connection
-	*/
-	public function __construct(ContainerInterface $container, \phpbb\config\config $config, \phpbb\db\driver\driver_interface $db)
-	{
-		$this->container = $container;
-		$this->config = $config;
-		$this->db = $db;
-	}
-
-	/**
-	* Return correct object for specified mode
-	*
-	* @param string	$mode		The feeds mode.
-	* @param int	$forum_id	Forum id specified by the script if forum feed provided.
-	* @param int	$topic_id	Topic id specified by the script if topic feed provided.
-	*
-	* @return object	Returns correct feeds object for specified mode.
-	*/
-	function get_feed($mode, $forum_id, $topic_id)
-	{
-		switch ($mode)
-		{
-			case 'forums':
-				if (!$this->config['feed_overall_forums'])
-				{
-					return false;
-				}
-
-				return $this->container->get('feed.forums');
-			break;
-
-			case 'topics':
-			case 'topics_new':
-				if (!$this->config['feed_topics_new'])
-				{
-					return false;
-				}
-
-				return $this->container->get('feed.topics');
-			break;
-
-			case 'topics_active':
-				if (!$this->config['feed_topics_active'])
-				{
-					return false;
-				}
-
-				return $this->container->get('feed.topics_active');
-			break;
-
-			case 'news':
-				// Get at least one news forum
-				$sql = 'SELECT forum_id
-					FROM ' . FORUMS_TABLE . '
-					WHERE ' . $this->db->sql_bit_and('forum_options', FORUM_OPTION_FEED_NEWS, '<> 0');
-				$result = $this->db->sql_query_limit($sql, 1, 0, 600);
-				$s_feed_news = (int) $this->db->sql_fetchfield('forum_id');
-				$this->db->sql_freeresult($result);
-
-				if (!$s_feed_news)
-				{
-					return false;
-				}
-
-				return $this->container->get('feed.news');
-			break;
-
-			default:
-				if ($topic_id && $this->config['feed_topic'])
-				{
-					return $this->container->get('feed.topic')
-								->set_topic_id($topic_id);
-				}
-				else if ($forum_id && $this->config['feed_forum'])
-				{
-					return $this->container->get('feed.forum')
-								->set_forum_id($forum_id);
-				}
-				else if ($this->config['feed_overall'])
-				{
-				return $this->container->get('feed.overall');
-				}
-
-				return false;
-			break;
-		}
-	}
-}
diff --git a/phpBB/phpbb/feed/forum.php b/phpBB/phpbb/feed/forum.php
index 7a2087c1cd..f493c4729a 100644
--- a/phpBB/phpbb/feed/forum.php
+++ b/phpBB/phpbb/feed/forum.php
@@ -13,6 +13,10 @@
 
 namespace phpbb\feed;
 
+use phpbb\feed\exception\no_feed_exception;
+use phpbb\feed\exception\no_forum_exception;
+use phpbb\feed\exception\unauthorized_forum_exception;
+
 /**
 * Forum feed
 *
@@ -49,25 +53,25 @@ class forum extends \phpbb\feed\post_base
 
 		if (empty($this->forum_data))
 		{
-			trigger_error('NO_FORUM');
+			throw new no_forum_exception($this->forum_id);
 		}
 
 		// Forum needs to be postable
 		if ($this->forum_data['forum_type'] != FORUM_POST)
 		{
-			trigger_error('NO_FEED');
+			throw new no_feed_exception();
 		}
 
 		// Make sure forum is not excluded from feed
 		if (phpbb_optionget(FORUM_OPTION_FEED_EXCLUDE, $this->forum_data['forum_options']))
 		{
-			trigger_error('NO_FEED');
+			throw new no_feed_exception();
 		}
 
 		// Make sure we can read this forum
 		if (!$this->auth->acl_get('f_read', $this->forum_id))
 		{
-			trigger_error('SORRY_AUTH_READ');
+			throw new unauthorized_forum_exception($this->forum_id);
 		}
 
 		// Make sure forum is not passworded or user is authed
@@ -77,7 +81,7 @@ class forum extends \phpbb\feed\post_base
 
 			if (isset($forum_ids_passworded[$this->forum_id]))
 			{
-				trigger_error('SORRY_AUTH_READ');
+				throw new unauthorized_forum_exception($this->forum_id);
 			}
 
 			unset($forum_ids_passworded);
diff --git a/phpBB/phpbb/feed/topic.php b/phpBB/phpbb/feed/topic.php
index 66c49e55cf..c916d3bccc 100644
--- a/phpBB/phpbb/feed/topic.php
+++ b/phpBB/phpbb/feed/topic.php
@@ -13,6 +13,11 @@
 
 namespace phpbb\feed;
 
+use phpbb\feed\exception\no_feed_exception;
+use phpbb\feed\exception\no_topic_exception;
+use phpbb\feed\exception\unauthorized_forum_exception;
+use phpbb\feed\exception\unauthorized_topic_exception;
+
 /**
 * Topic feed for a specific topic
 *
@@ -50,7 +55,7 @@ class topic extends \phpbb\feed\post_base
 
 		if (empty($this->topic_data))
 		{
-			trigger_error('NO_TOPIC');
+			throw new no_topic_exception($this->topic_id);
 		}
 
 		$this->forum_id = (int) $this->topic_data['forum_id'];
@@ -58,19 +63,19 @@ class topic extends \phpbb\feed\post_base
 		// Make sure topic is either approved or user authed
 		if ($this->topic_data['topic_visibility'] != ITEM_APPROVED && !$this->auth->acl_get('m_approve', $this->forum_id))
 		{
-			trigger_error('SORRY_AUTH_READ');
+			throw new unauthorized_topic_exception($this->topic_id);
 		}
 
 		// Make sure forum is not excluded from feed
 		if (phpbb_optionget(FORUM_OPTION_FEED_EXCLUDE, $this->topic_data['forum_options']))
 		{
-			trigger_error('NO_FEED');
+			throw new no_feed_exception();
 		}
 
 		// Make sure we can read this forum
 		if (!$this->auth->acl_get('f_read', $this->forum_id))
 		{
-			trigger_error('SORRY_AUTH_READ');
+			throw new unauthorized_forum_exception($this->forum_id);
 		}
 
 		// Make sure forum is not passworded or user is authed
@@ -80,7 +85,7 @@ class topic extends \phpbb\feed\post_base
 
 			if (isset($forum_ids_passworded[$this->forum_id]))
 			{
-				trigger_error('SORRY_AUTH_READ');
+				throw new unauthorized_forum_exception($this->forum_id);
 			}
 
 			unset($forum_ids_passworded);