[feature/controller] Implement a front controller

PHPBB3-10864

phpBB/includes/controller/helper.php

@@ -0,0 +1,142 @@
+<?php
+/**
+*
+* @package controller
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+
+/**
+* Controller helper class, contains methods that do things for controllers
+* @package phpBB3
+*/
+class phpbb_controller_helper
+{
+	/**
+	* Container
+	* @var ContainerBuilder
+	*/
+	protected $container;
+
+	/**
+	* Template object
+	* @var phpbb_template
+	*/
+	protected $template;
+
+	/**
+	* phpBB Root Path
+	* @var string
+	*/
+	protected $phpbb_root_path;
+
+	/**
+	* PHP Extension
+	* @var string
+	*/
+	protected $php_ext;
+
+	/**
+	* Base URL
+	* @var array
+	*/
+	protected $url_base;
+
+	/**
+	* Constructor
+	*
+	* @param ContainerBuilder $container DI Container
+	*/
+	public function __construct(ContainerBuilder $container)
+	{
+		$this->container = $container;
+
+		$this->template = $this->container->get('template');
+		$this->phpbb_root_path = $this->container->getParameter('core.root_path');
+		$this->php_ext = $this->container->getParameter('core.php_ext');
+	}
+
+	/**
+	* Automate setting up the page and creating the response object.
+	*
+	* @param string $handle The template handle to render
+	* @param string $page_title The title of the page to output
+	* @param int $status_code The status code to be sent to the page header
+	* @return Response object containing rendered page
+	*/
+	public function render($template_file, $page_title = '', $status_code = 200)
+	{
+		if (!function_exists('page_header'))
+		{
+			include("{$this->phpbb_root_path}includes/functions.{$this->php_ext}");
+		}
+
+		page_header($page_title);
+
+		$this->template->set_filenames(array(
+			'body'	=> $template_file,
+		));
+
+		page_footer(true, false, false);
+
+		return new Response($this->template->return_display('body'), $status_code);
+	}
+
+	/**
+	* Easily generate a URL
+	*
+	* @param array $url_parts Each array element is a 'folder'
+	* 		i.e. array('my', 'ext') maps to ./app.php/my/ext
+	* @param mixed $query The Query string, passed directly into the second
+	*		argument of append_sid()
+	* @return string A URL that has already been run through append_sid()
+	*/
+	public function url(array $url_parts, $query = '')
+	{
+		return append_sid($this->phpbb_root_path . $this->url_base . implode('/', $url_parts), $query);
+	}
+
+	/**
+	* Set base to prepend to urls generated by url()
+	* This allows extensions to have a certain 'directory' under which
+	* all their pages are served, but not have to type it every time
+	*
+	* @param array $url_parts Each array element is a 'folder'
+	*		i.e. array('my', 'ext') maps to ./app.php/my/ext
+	* @return null
+	*/
+	public function set_url_base(array $url_parts)
+	{
+		$this->url_base = !empty($url_parts) ? implode('/', $url_parts) . '/' : '';
+	}
+
+	/**
+	* Output an error, effectively the same thing as trigger_error
+	*
+	* @param string $code The error code (e.g. 404, 500, 503, etc.)
+	* @param string $message The error message
+	* @return Response A Reponse instance
+	*/
+	public function error($code = 500, $message = '')
+	{
+		$this->template->assign_vars(array(
+			'MESSAGE_TEXT'	=> $message,
+			'MESSAGE_TITLE'	=> $this->container->get('user')->lang('INFORMATION'),
+		));
+
+		return $this->render('message_body.html', $this->container->get('user')->lang('INFORMATION'), $code);
+	}
+}

phpBB/includes/controller/provider.php

@@ -0,0 +1,94 @@
+<?php
+/**
+*
+* @package controller
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+use Symfony\Component\Routing\RouteCollection;
+use Symfony\Component\Routing\Loader\YamlFileLoader;
+use Symfony\Component\Config\FileLocator;
+
+/**
+* Controller interface
+* @package phpBB3
+*/
+class phpbb_controller_provider
+{
+	/**
+	* YAML file(s) containing route information
+	* @var array
+	*/
+	protected $routing_paths;
+
+	/**
+	* Construct method
+	*
+	* @param array() $routing_paths Array of strings containing paths
+	*							to YAML files holding route information
+	*/
+	public function __construct($routing_paths = array())
+	{
+		$this->set_paths($routing_paths);
+	}
+
+	/**
+	* Locate paths containing routing files
+	* This sets an internal property but does not return the paths.
+	*
+	* @return The current instance of this object for method chaining
+	*/
+	public function get_paths(phpbb_extension_finder $finder)
+	{
+		// We hardcode the path to the core config directory
+		// because the finder cannot find it
+		$this->set_paths(array_merge(array('config'), array_map('dirname', array_keys($finder
+			->directory('config')
+			->prefix('routing')
+			->suffix('yml')
+			->find()
+		))));
+
+		return $this;
+	}
+
+	/**
+	* Set the $routing_paths property with a given list of paths
+	*
+	* @return The current instance of this object for method chaining
+	*/
+	public function set_paths(array $paths)
+	{
+		$this->routing_paths = $paths;
+
+		return $this;
+	}
+
+	/**
+	* Get a list of controllers and return it
+	*
+	* @param string $base_path Base path to prepend to file paths
+	* @return array Array of controllers and their route information
+	*/
+	public function find($base_path = '')
+	{
+		$routes = new RouteCollection;
+		foreach ($this->routing_paths as $path)
+		{
+			$loader = new YamlFileLoader(new FileLocator($base_path . $path));
+			$routes->addCollection($loader->load('routing.yml'));
+		}
+
+		return $routes;
+	}
+}

phpBB/includes/controller/resolver.php

@@ -0,0 +1,123 @@
+<?php
+/**
+*
+* @package controller
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+use Symfony\Component\HttpKernel\Controller\ControllerResolverInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+* Controller manager class
+* @package phpBB3
+*/
+class phpbb_controller_resolver implements ControllerResolverInterface
+{
+	/**
+	* User object
+	* @var phpbb_user
+	*/
+	protected $user;
+
+	/**
+	* ContainerInterface object
+	* @var ContainerInterface
+	*/
+	protected $container;
+
+	/**
+	* Construct method
+	*
+	* @param phpbb_user $user User Object
+	* @param ContainerInterface $container ContainerInterface object
+	*/
+	public function __construct(phpbb_user $user, ContainerInterface $container)
+	{
+		$this->user = $user;
+		$this->container = $container;
+	}
+
+	/**
+	* Load a controller callable
+	*
+	* @param Symfony\Component\HttpFoundation\Request $request Symfony Request object
+	* @return bool|Callable Callable or false
+	* @throws RuntimeException
+	*/
+	public function getController(Request $request)
+	{
+		$controller = $request->attributes->get('_controller');
+
+		if (!$controller)
+		{
+			throw new RuntimeException($this->user->lang['CONTROLLER_NOT_SPECIFIED']);
+		}
+
+		// Require a method name along with the service name
+		if (stripos($controller, ':') === false)
+		{
+			throw new RuntimeException($this->user->lang['CONTROLLER_METHOD_NOT_SPECIFIED']);
+		}
+
+		list($service, $method) = explode(':', $controller);
+
+		if (!$this->container->has($service))
+		{
+			throw new RuntimeException($this->user->lang('CONTROLLER_SERVICE_UNDEFINED', $service));
+		}
+
+		$controller_object = $this->container->get($service);
+
+		return array($controller_object, $method);
+	}
+
+	/**
+	* Dependencies should be specified in the service definition and can be
+	* then accessed in __construct(). Arguments are sent through the URL path
+	* and should match the parameters of the method you are using as your
+	* controller.
+	*
+	* @param Symfony\Component\HttpFoundation\Request $request Symfony Request object
+	* @param string $controller Controller class name
+	* @return bool False
+	*/
+	public function getArguments(Request $request, $controller)
+	{
+		// At this point, $controller contains the object and method name
+		list($object, $method) = $controller;
+		$mirror = new ReflectionMethod($object, $method);
+
+		$arguments = array();
+		$parameters = $mirror->getParameters();
+		$attributes = $request->attributes->all();
+		foreach ($parameters as $param)
+		{
+			if (array_key_exists($param->name, $attributes))
+			{
+				$arguments[] = $attributes[$param->name];
+			}
+			else if ($param->isDefaultValueAvailable())
+			{
+				$arguments[] = $param->getDefaultValue();
+			}
+			else
+			{
+				throw new RuntimeException($user->lang('CONTROLLER_ARGUMENT_VALUE_MISSING', $param->getPosition() + 1, get_class($object) . ':' . $method, $param->name));
+			}
+		}
+
+		return $arguments;
+	}
+}

phpBB/includes/controller/route_collection.php

@@ -0,0 +1,36 @@
+<?php
+/**
+*
+* @package controller
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+use Symfony\Component\Routing\RouteCollection;
+
+/**
+* Controller manager class
+* @package phpBB3
+*/
+class phpbb_controller_route_collection extends RouteCollection
+{
+	/**
+	* Construct method
+	*
+	* @param phpbb_extension_finder $finder Finder object
+	*/
+	public function __construct(phpbb_extension_finder $finder, phpbb_controller_provider $provider)
+	{
+		parent::__construct();
+		$this->addCollection($provider->get_paths($finder)->find());
+	}
+}