~george-edison55/jsstudio/addons_site

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<?php

//=======================================================================
//                            index.php
//                  Copyright (C) 2011 Nathan Osman
//
// 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 3 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.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//=======================================================================

// All controllers must derive from BaseController
require_once 'base_controller.php';

class JSStudioAddons
{
    private $controller = 'addons'; // the default controller
    private $action     = 'index';  // and the default action
    
    private function FatalError($details)
    {
        header('Content-type: text/plain');
        echo "This web application has encountered a serious internal error.\n" .
             "Please try reloading the page or contact <admin@quickmediasolutions.com> if you continue to encounter this error.\n\n" .
             'Details: ' . $details;
        exit;
    }
    
    // Converts one_class to OneClass
    private function GetClassName($raw_name)
    {
        return str_replace(' ', '', ucwords(str_replace('_', ' ', $raw_name))) . 'Controller';
    }
    
    private function ParseURL()
    {
        // The original requested path is passed to us
        // in a $_GET variable as 'url'.
        $url_parts = explode('/', $_GET['url']);
        
        // Grab the parameters that were supplied
        if(count($url_parts) > 0 && $url_parts[0] != '')
        {
            $this->controller = $url_parts[0];
            if(count($url_parts) > 1 && $url_parts[1] != '')
                $this->action = $url_parts[1];
        }
        
        // Make sure that there were no bad characters in the
        // controller and the action.
        if(!preg_match('/^\w+$/', $this->controller) ||
           !preg_match('/^\w+$/', $this->action))
            $this->FatalError('The request URL is invalid.');
    }
    
    public function RunController()
    {
        // We have a controller name... check for the file's
        // existence in the controller's folder.
        $controller_filename = "controllers/{$this->controller}.php";
        if(!is_file($controller_filename))
            $this->FatalError("The '{$this->controller}' controller does not exist.");
        
        // Load the controller file
        require $controller_filename;
        
        // Now attempt to find the appropriate class in the controller
        $class_name = $this->GetClassName($this->controller);
        if(class_exists($class_name) === FALSE)
            $this->FatalError("The class '$class_name' does not exist within the file '$controller_filename'.");
        
        // Create an instance of the class
        $controller_instance = new $class_name();
        
        // Make sure the class derives from BaseController
        if(!$controller_instance instanceof BaseController)
            $this->FatalError("The class '$class_name' must derive from BaseController.");
        
        // Make sure the specified method exists within the class
        $method_name = $this->action;
        if(method_exists($class_name, $method_name) === FALSE)
            $this->FatalError("The class '$class_name' does not contain a method for the action '$method_name'.");
        
        // Okay, now invoke the method
        $controller_instance->$method_name();
        
        // Return the view variables that were created by the controller
        return $controller_instance->GetViewVariables();
    }
    
    private function DisplayView($view_variables)
    {
        // Make sure that the view exists
        $view_filename = "views/{$this->controller}/{$this->action}.inc";
        if(!is_file($view_filename))
            $this->FatalError("The view for the action {$this->action} is missing.");
        
        // Now we need to import all of the variables
        // in $view_variables into the local scope.
        foreach($view_variables as $key =>$value)
            $$key = $value;
        
        // Now run the view
        require_once $view_filename;
    }
    
    public function Go()
    {
        // Start by parsing the URL
        $this->ParseURL();
        
        // Now run the selected controller
        $view_vars = $this->RunController();
        
        // ...and lastly display the view
        $this->DisplayView($view_vars);
    }
}

$addons = new JSStudioAddons();
$addons->Go();

?>