4 files changed, 96 insertions, 0 deletions
diff --git a/phpBB/includes/extension/controller_interface.php b/phpBB/includes/extension/controller_interface.php
new file mode 100644
index 0000000000..bcc8972db4
--- /dev/null
+++ b/phpBB/includes/extension/controller_interface.php
@@ -0,0 +1,31 @@
+<?php
+/**
+*
+* @package extension
+* @copyright (c) 2011 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* The interface that extension classes have to implement to run front pages
+*
+* @package extension
+*/
+interface phpbb_extension_controller_interface
+{
+	/**
+	* handle the request to display a page from an extension
+	*
+	* @return	null
+	*/
+	public function handle();
+}
diff --git a/phpBB/includes/extension/manager.php b/phpBB/includes/extension/manager.php
index c38f0df32e..b94379141c 100644
--- a/phpBB/includes/extension/manager.php
+++ b/phpBB/includes/extension/manager.php
@@ -428,6 +428,28 @@ class phpbb_extension_manager
 		}
 		return $disabled;
 	}
+	
+	/**
+	* Check to see if a given extension is available on the filesystem
+	*
+	* @param string $name Extension name to check
+	* @return bool Depending on whether or not the extension is available
+	*/
+	public function available($name)
+	{
+		return file_exists($this->phpbb_root_path . "ext/$name/");
+	}
+
+	/**
+	* Check to see if a given extension is enabled
+	*
+	* @param string $name Extension name to check
+	* @return bool Depending on whether or not the extension is enabled
+	*/
+	public function enabled($name)
+	{
+		return isset($this->extensions[$name]) && $this->extensions[$name]['ext_active'];
+	}
 
 	/**
 	* Instantiates a phpbb_extension_finder.
diff --git a/phpBB/index.php b/phpBB/index.php
index f1243bb336..a206ed4d37 100644
--- a/phpBB/index.php
+++ b/phpBB/index.php
@@ -24,6 +24,45 @@ $user->session_begin();
 $auth->acl($user->data);
 $user->setup('viewforum');
 
+// If given an extension, look for a front controller
+if ($ext = $request->variable('ext', ''))
+{
+	// The class to load
+	$class = "phpbb_ext_{$ext}_controller";
+
+	// Make sure the specified extension is enabled
+	// and that it has a controller class
+	if (!$phpbb_extension_manager->available($ext))
+	{
+		send_status_line(404, 'Not Found');
+		trigger_error($user->lang('EXTENSION_DOES_NOT_EXIST', $ext));	
+	}
+	else if (!$phpbb_extension_manager->enabled($ext))
+	{
+		send_status_line(404, 'Not Found');
+		trigger_error($user->lang('EXTENSION_DISABLED', $ext));
+	}
+	else if (!file_exists("{$phpbb_root_path}ext/$ext/controller.$phpEx") || !class_exists($class))
+	{
+		send_status_line(404, 'Not Found');
+		trigger_error($user->lang('EXTENSION_CONTROLLER_MISSING', $ext));
+	}
+
+	// Instantiate the extension controller
+	$controller = new $class;
+
+	// But let's make sure it's actually a proper controller
+	if (!($controller instanceof phpbb_extension_controller_interface))
+	{
+		send_status_line(500, 'Internal Server Error');
+		trigger_error($user->lang('EXTENSION_CLASS_WRONG_TYPE', $class));
+	}
+
+	// Let's get it started...
+	$controller->handle();
+	exit_handler();
+}
+
 display_forums('', $config['load_moderators']);
 
 $order_legend = ($config['legend_sort_groupname']) ? 'group_name' : 'group_legend';
diff --git a/phpBB/language/en/common.php b/phpBB/language/en/common.php
index 7741ff8d1f..94edddc6f5 100644
--- a/phpBB/language/en/common.php
+++ b/phpBB/language/en/common.php
@@ -185,7 +185,11 @@ $lang = array_merge($lang, array(
 	'ERR_WRONG_PATH_TO_PHPBB'			=> 'The phpBB path specified appears to be invalid.',
 	'EXPAND_VIEW'						=> 'Expand view',
 	'EXTENSION'							=> 'Extension',
+	'EXTENSION_CONTROLLER_MISSING'		=> 'The extension <strong>%s</strong> is missing a controller class and cannot be accessed through the front-end.',
+	'EXTENSION_CLASS_WRONG_TYPE'		=> 'The extension controller class <strong>%s</strong> is not an instance of the phpbb_extension_controller_interface.',
+	'EXTENSION_DISABLED'				=> 'The extension <strong>%s</strong> is not enabled.',
 	'EXTENSION_DISABLED_AFTER_POSTING'	=> 'The extension <strong>%s</strong> has been deactivated and can no longer be displayed.',
+	'EXTENSION_DOES_NOT_EXIST'			=> 'The extension <strong>%s</strong> does not exist.',
 
 	'FAQ'					=> 'FAQ',
 	'FAQ_EXPLAIN'			=> 'Frequently Asked Questions',