Simple Front Controller with Namespaces

Autoloader.php

<?php
namespace Sabel\Scrap\Loader;

class Autoloader
{
    private $_fileExtension = '.php';
    private $_namespace;
    private $_includePath;
    private $_namespaceSeparator = '\\';

    /**
     * Creates a new <tt>SplClassLoader</tt> that loads classes of the
     * specified namespace.
     *
     * @param string $ns The namespace to use.
     */
    public function __construct($ns = null, $includePath = null)
    {
        $this->_namespace = $ns;
        $this->_includePath = $includePath;
    }

    /**
     * Sets the namespace separator used by classes in the namespace of this class loader.
     *
     * @param string $sep The separator to use.
     */
    public function setNamespaceSeparator($sep)
    {
        $this->_namespaceSeparator = $sep;
    }

    /**
     * Gets the namespace seperator used by classes in the namespace of this class loader.
     *
     * @return void
     */
    public function getNamespaceSeparator()
    {
        return $this->_namespaceSeparator;
    }

    /**
     * Sets the base include path for all class files in the namespace of this class loader.
     *
     * @param string $includePath
     */
    public function setIncludePath($includePath)
    {
        $this->_includePath = $includePath;
    }

    /**
     * Gets the base include path for all class files in the namespace of this class loader.
     *
     * @return string $includePath
     */
    public function getIncludePath()
    {
        return $this->_includePath;
    }

    /**
     * Sets the file extension of class files in the namespace of this class loader.
     *
     * @param string $fileExtension
     */
    public function setFileExtension($fileExtension)
    {
        $this->_fileExtension = $fileExtension;
    }

    /**
     * Gets the file extension of class files in the namespace of this class loader.
     *
     * @return string $fileExtension
     */
    public function getFileExtension()
    {
        return $this->_fileExtension;
    }

    /**
     * Installs this class loader on the SPL autoload stack.
     */
    public function register()
    {
        spl_autoload_register(array($this, 'loadClass'));
    }

    /**
     * Uninstalls this class loader from the SPL autoloader stack.
     */
    public function unregister()
    {
        spl_autoload_unregister(array($this, 'loadClass'));
    }

    /**
     * Loads the given class or interface.
     *
     * @param string $className The name of the class to load.
     * @return void
     */
    public function loadClass($className)
    {
        if (null === $this->_namespace || $this->_namespace.$this->_namespaceSeparator === substr($className, 0, strlen($this->_namespace.$this->_namespaceSeparator))) {
            $fileName = '';
            $namespace = '';
            if (false !== ($lastNsPos = strripos($className, $this->_namespaceSeparator))) {
                $namespace = substr($className, 0, $lastNsPos);
                $className = substr($className, $lastNsPos + 1);
                $fileName = str_replace($this->_namespaceSeparator, DIRECTORY_SEPARATOR, $namespace) . DIRECTORY_SEPARATOR;
            }
            $fileName .= str_replace('_', DIRECTORY_SEPARATOR, $className) . $this->_fileExtension;
            
            require ($this->_includePath !== null ? $this->_includePath . DIRECTORY_SEPARATOR : '') . $fileName;
        }
    }
}

FrontController.php

<?php
namespace Sabel\Scrap\Controller;

use Sabel\Scrap\Controller\FrontControllerInterface;
use Sabel\Scrap\Model\Db;
 
class FrontController implements FrontControllerInterface
{
    const DEFAULT_CONTROLLER = "IndexController";
    const DEFAULT_ACTION     = "index";
     
    protected $controller    = self::DEFAULT_CONTROLLER;
    protected $action        = self::DEFAULT_ACTION;
    protected $params        = array();
    protected $basePath      = "mybasepath/";
     
    public function __construct(array $options = array()) {
        if (empty($options)) {
           $this->parseUri();
        }
        else {
            if (isset($options["controller"])) {
                $this->setController($options["controller"]);
            }
            if (isset($options["action"])) {
                $this->setAction($options["action"]);    
            }
            if (isset($options["params"])) {
                $this->setParams($options["params"]);
            }
        }
    }
     
    protected function parseUri() {
        $path = trim(parse_url($_SERVER["REQUEST_URI"], PHP_URL_PATH), "/");
        //$path = preg_replace('/[^a-zA-Z0-9]//', "", $path);
        if (strpos($path, $this->basePath) === 0) {
            $path = substr($path, strlen($this->basePath));
        }
        @list($controller, $action, $params) = explode("/", $path, 3);
        if (isset($controller)) {
            $this->setController($controller);
        }
        if (isset($action)) {
            $this->setAction($action);
        }
        if (isset($params)) {
            $this->setParams(explode("/", $params));
        }
    }
     
    public function setController($controller) {
        $controller = ucfirst(strtolower($controller)) . "Controller";
        if (!class_exists(__NAMESPACE__.'\\'.$controller)) {
            throw new \InvalidArgumentException(
                "The action controller '$controller' has not been defined.");
        }
        $this->controller = $controller;
        return $this;
    }
     
    public function setAction($action) {
        $action .= "Action";
        $reflector = new \ReflectionClass(__NAMESPACE__.'\\'.$this->controller);
        if (!$reflector->hasMethod($action)) {
            throw new \InvalidArgumentException(
                "The controller action '$action' has been not defined.");
        }
        $this->action = $action;
        return $this;
    }

    public function setParams(array $params) {
        $this->params = $params;
        return $this;
    }

    public function run() {

//        require_once '../../../../PHP/checkCredentials.php';
        require_once 'ToolkitService.php';
//        require_once '/../Model/Db.php';

        // Connect to database
        $db = new Db('*LOCAL', 'AS400', 'AS400');

        try
        {
            $db->connect();
        }
        catch (\Exception $e)
        {
            error_log("Couldn't connect to db");
        }

        // Create toolkit object
        try
        {
            $toolkitObj = \ToolkitService::getInstance($db->getHandler(), 'DB2_I5_NAMING_ON');
            $toolkitObj->setOptions(array('stateless'=>true));

        }
        catch (\Exception $e)
        {
            echo  $e->getMessage(), "\n";
            exit();
        }

        $this->controller = __NAMESPACE__."\\".$this->controller;
        call_user_func_array(array(new $this->controller($db,$toolkitObj), $this->action), $this->params);
    }
}

index.php

<?php
use Sabel\Scrap\Loader\Autoloader;
use Sabel\Scrap\Controller\FrontController;

ini_set("error_log","/usr/local/zendsvr6/var/log/chuk-debug.log");

require_once __DIR__ . "/../Loader/Autoloader.php";
$autoloader = new Autoloader('Sabel\Scrap',__DIR__.'/../lib');
$autoloader->register();

$frontController = new FrontController();
$frontController->run();