<?php
/**
 * modManagerRequest
 *
 * @package modx
 */
require_once MODX_CORE_PATH . 'model/modx/modrequest.class.php';
/**
 * Encapsulates the interaction of MODX manager with an HTTP request.
 *
 * {@inheritdoc}
 *
 * @package modx
 */
class modManagerRequest extends modRequest {
    /**
     * @var string The action to load.
     * @access public
     */
    public $action= null;
    /**
     * @deprecated 2.0.0 Use $modx->error instead.
     * @var modError The error handler for the request.
     * @access public
     */
    public $error= null;
    /**
     * @var string The REQUEST parameter to load actions by.
     * @access public
     */
    public $actionVar = 'a';
    /**
     * @var mixed The default action to load from.
     * @access public
     */
    public $defaultAction = 'welcome';

    public $namespace = 'core';
    public $namespaceVar = 'namespace';

    /**
     * Instantiates a modManagerRequest object.
     *
     * @param modX $modx
     * @return modManagerRequest
     */
    function __construct(modX & $modx) {
        parent :: __construct($modx);
        $this->initialize();
    }

    /**
     * Initializes the manager request.
     *
     * @access public
     * @return boolean True if successful.
     */
    public function initialize() {
        $this->sanitizeRequest();
        
        if (!defined('MODX_INCLUDES_PATH')) {
            define('MODX_INCLUDES_PATH',$this->modx->getOption('manager_path').'includes/');
        }

        /* load smarty template engine */
        $theme = $this->modx->getOption('manager_theme',null,'default');
        $templatePath = $this->modx->getOption('manager_path') . 'templates/' . $theme . '/';
        if (!file_exists($templatePath)) { /* fallback to default */
            $templatePath = $this->modx->getOption('manager_path') . 'templates/default/';
        }
        $this->modx->getService('smarty', 'smarty.modSmarty', '', array(
            'template_dir' => $templatePath,
        ));
        /* load context-specific cache dir */
        $this->modx->smarty->setCachePath($this->modx->context->get('key').'/smarty/'.$theme.'/');

        $this->modx->smarty->assign('_config',$this->modx->config);
        $this->modx->smarty->assignByRef('modx',$this->modx);

        if (!array_key_exists('a', $_REQUEST)) {
            $_REQUEST[$this->actionVar] = $this->modx->getOption('welcome_action', null, $this->defaultAction);
            $_REQUEST[$this->namespaceVar] = $this->modx->getOption('welcome_namespace', null, 'core');
        }

        /* send anti caching headers */
        header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
        header('Last-Modified: '.gmdate('D, d M Y H:i:s').' GMT');
        header('Cache-Control: no-store, no-cache, must-revalidate');
        header('Cache-Control: post-check=0, pre-check=0', false);
        header('Pragma: no-cache');
        /* send the charset header */
        header('Content-Type: text/html; charset='.$this->modx->getOption('modx_charset'));

        /*
         * TODO: implement destroy active sessions if installing
         * TODO: implement regen session if not destroyed from install
         */

        /* include version info */
        if ($this->modx->version === null) $this->modx->getVersionData();


        if ($this->modx->getOption('manager_language')) {
            $this->modx->setOption('cultureKey',$this->modx->getOption('manager_language'));
        }

        /* load default core cache file of lexicon strings */
        $this->modx->lexicon->load('core:default');
        return true;
    }

    /**
     * The primary MODX manager request handler (a.k.a. controller).
     *
     * @access public
     * @return boolean True if a request is handled without interruption.
     */
    public function handleRequest() {
        /* Load error handling class */
        $this->loadErrorHandler();

        $this->modx->invokeEvent('OnHandleRequest');

        /* save page to manager object. allow custom actionVar choice for extending classes. */
        $this->action = !empty($_REQUEST[$this->actionVar]) ? trim($_REQUEST[$this->actionVar]) : $this->defaultAction;
        $this->action = preg_replace("/[^A-Za-z0-9_\-\/]/",'',$this->action);
        $this->action = trim(trim(str_replace('//','',$this->action),'/'));
        $this->namespace = !empty($_REQUEST[$this->namespaceVar]) ? trim($_REQUEST[$this->namespaceVar]) : 'core';
        $this->namespace = preg_replace("/[^A-Za-z0-9_\-\/]/",'',$this->namespace);
        $this->namespace = trim(trim(str_replace('//','',$this->namespace),'/'));

        /* invoke OnManagerPageInit event */
        $this->modx->invokeEvent('OnManagerPageInit',array('action' => $this->action));
        $this->prepareResponse();
    }

    /**
     * This implementation adds register logging capabilities via $_POST vars
     * when the error handler is loaded.
     *
     * @param string $class
     */
    public function loadErrorHandler($class = 'modError') {
        parent :: loadErrorHandler($class);
        $data = array_merge($_POST, array(
            'register_class' => 'registry.modFileRegister'
        ));
        $this->registerLogging($data);
    }

    /**
     * Loads the actionMap, and generates a cache file if necessary.
     *
     * @access public
     * @return boolean True if successful.
     */
    public function loadActionMap() {
        $loaded = false;
        $cacheKey= $this->modx->context->get('key') . '/actions';
        $map = $this->modx->cacheManager->get($cacheKey, array(
            xPDO::OPT_CACHE_KEY => $this->modx->getOption('cache_action_map_key', null, 'action_map'),
            xPDO::OPT_CACHE_HANDLER => $this->modx->getOption('cache_action_map_handler', null, $this->modx->getOption(xPDO::OPT_CACHE_HANDLER)),
            xPDO::OPT_CACHE_FORMAT => (integer) $this->modx->getOption('cache_action_map_format', null, $this->modx->getOption(xPDO::OPT_CACHE_FORMAT, null, xPDOCacheManager::CACHE_PHP)),
        ));
        if (!$map) {
            $map = $this->modx->cacheManager->generateActionMap($cacheKey);
        }
        if ($map) {
            $this->modx->actionMap = $map;
            $loaded = true;
        }
        return $loaded;
    }

    /**
     * Prepares the MODX response to a mgr request that is being handled.
     *
     * @access public
     * @param array $options An array of options
     * @return boolean True if the response is properly prepared.
     */
    public function prepareResponse(array $options = array()) {
        if (!$this->modx->getResponse('modManagerResponse')) {
            $this->modx->log(modX::LOG_LEVEL_FATAL, 'Could not load response class.');
        }
        $this->modx->response->outputContent($options);
    }
}
