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<?php
/*
Question2Answer by Gideon Greenspan and contributors
http://www.question2answer.org/
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
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 General Public License for more details.
More about this license: http://www.question2answer.org/license.php
*/
namespace Q2A\Controllers;
use Q2A\Database\DbConnection;
use Q2A\Middleware\BaseMiddleware;
abstract class BaseController
{
/** @var BaseMiddleware[string] */
protected $middleware = [];
protected $db;
public function __construct(DbConnection $db)
{
$this->db = $db;
}
/**
* Attach a middleware to one action or an array of actions. Use '*' to match all actions.
*
* @param BaseMiddleware $middleware
* @param array|string $actions
*/
public function addMiddleware(BaseMiddleware $middleware, $actions = '*')
{
if (is_array($actions)) {
foreach ($actions as $action) {
$this->addMiddlewareToAction($middleware, $action);
}
} else { // If it is a string
$this->addMiddlewareToAction($middleware, $actions);
}
}
/**
* @param BaseMiddleware $middleware
* @param string $action
*/
private function addMiddlewareToAction(BaseMiddleware $middleware, $action)
{
if (!isset($this->middleware[$action])) {
$this->middleware[$action] = array();
}
$this->middleware[$action][] = $middleware;
}
/**
* Execute the given action with the given parameters on this controller. after running all
* middleware for the action. This method is expected to return a qa_content array or throw an
* exception.
*
* @param string $action Action to execute
* @param array $parameters Parameters to send to the action
*
* @return mixed
*/
public function executeAction($action, $parameters)
{
$this->executeMiddlewareForAction('*');
$this->executeMiddlewareForAction($action);
return call_user_func_array(array($this, $action), $parameters);
}
/**
* @param string $action
*/
private function executeMiddlewareForAction($action)
{
if (!isset($this->middleware[$action])) {
return;
}
foreach ($this->middleware[$action] as $middleware) {
$middleware->handle();
}
}
}