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<?php
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namespace PointedEars\PHPX;
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/**
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 * A general controller that can handle views according to
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 * the MVC pattern
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 *
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 * @author tlahn
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 */
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abstract class Controller
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{
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  /**
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   * Default action of the controller
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   * @var string
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   */
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  protected $_defaultAction = 'index';
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  /**
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   * If an array, maps an action name to an action method of the controller.
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   *
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   * Fallback for IE 7 where the content of a <code>button</code> element
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   * is submitted as value.
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   *
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   * @var array
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   */
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  protected $_actionMap = null;
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  /**
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   * The {@link View} used by this controller
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   * @var View
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   */
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  protected $_view = null;
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  /**
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   * Constructs a controller, initializes the related view,
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   * and calls the controller's URI-indicated action method.
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   *
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   * @param string $viewClass
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   *   View class.  The default is <code>'View'</code>.
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   * @param string $template
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   *   Resource path of the template for the view.  The default
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   *   is to <code>null</code> (no template).
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   *
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   * @see View::__construct()
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   */
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  protected function __construct($viewClass = 'View', $template = null)
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  {
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    $this->_view = new $viewClass($template);
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    Application::getInstance()->setCurrentController($this);
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    $action = Application::getParam('action', $_REQUEST);
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    /* NOTE: No `==='; treat empty action like no specific action */
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    if ($action == null)
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    {
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      $action = $this->_defaultAction;
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    }
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    $actionMethod = lcfirst($action) . 'Action';
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    /* Fallback for IE 7 where the content of a `button' element is submitted as value */
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    if (!method_exists($this, $actionMethod))
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    {
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      if (is_array($this->_actionMap) && array_key_exists($action, $this->_actionMap))
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      {
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        $actionMethod = $this->_actionMap[$action];
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      }
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    }
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    $this->$actionMethod();
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  }
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  /**
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   * Assigns a value to a template variable (after this,
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   * <var>$value</var> is available through
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   * <code>$this-><var>$name</var></code> in the view's template).
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   * <code>Controller</code>s should call this method instead of
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   * {@link View::assign()}.
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   *
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   * @param string $name
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   *   Variable name
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   * @param mixed $value
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   *   Variable value
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   * @param bool $encodeHTML
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   *   If <code>true</code>, replace all potentially conflicting
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   *   characters in <var>$value</var> with their HTML entity
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   *   references.  The default is <code>false</code>.
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   * @return mixed The assigned value (after possible HTML encoding)
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   * @see View::encodeHTML()
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   */
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  protected function assign($name, $value, $encodeHTML = false)
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  {
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    return $this->_view->assign($name, $value, $encodeHTML);
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  }
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  /**
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   * Renders the {@link View} associated with this controller
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   * by including the <code>View</code>'s template.
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   * <code>Controller</code>s should call this method instead of
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   * <code>View::render()</code>.
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   *
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   * @param string $template
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   *   Optional alternative template resource path.
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   *   If not provided, the default template (the
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   *   <code>View</code>'s <code>$template</code> property)
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   *   will be used.
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   */
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  public function render($template = null, $content = null)
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  {
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    $this->_view->render($template, $content);
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  }
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}
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?>