<?php

    /**
     * The Legend of Z
     *
     * @author      Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
     * @copyright   2014 Heinrich-Heine-Universität Düsseldorf
     * @license     http://www.gnu.org/licenses/gpl.html
     * @link        https://bitbucket.org/coderkun/the-legend-of-z
     */

    namespace hhu\z\controllers;


    /**
     * Abstract class for implementing a Controller for a Seminary and its
     * concepts.
     *
     * @author  Oliver Hanraths <oliver.hanraths@uni-duesseldorf.de>
     */
    abstract class SeminaryController extends \hhu\z\controllers\IntermediateController
    {
        /**
         * Required components
         *
         * @var array
         */
        public $components = array('achievement', 'auth', 'notification');
        /**
         * Required models
         *
         * @var array
         */
        public $models = array('seminaries', 'characters', 'characterroles', 'xplevels', 'avatars', 'achievements', 'charactertitles');
        /**
         * Current Seminary
         *
         * var array
         */
        public static $seminary = null;
        /**
         * Character of current user and Seminary
         *
         * @var array
         */
        public static $character = null;


        /**
         * Construct a new Seminary Controller.
         *
         * @throws  \nre\exceptions\DriverNotFoundException
         * @throws  \nre\exceptions\DriverNotValidException
         * @throws  \nre\exceptions\ModelNotValidException
         * @throws  \nre\exceptions\ModelNotFoundException
         * @throws  \nre\exceptions\ViewNotFoundException
         * @param   string      $layoutName Name of the current Layout
         * @param   string      $action     Current Action
         * @param   \nre\core\Agent $agent      Corresponding Agent
         */
        public function __construct($layoutName, $action, $agent)
        {
            parent::__construct($layoutName, $action, $agent);
        }


        /**
         * Prefilter that is executed before running the Controller.
         *
         * @param   \nre\core\Request   $request    Current request
         * @param   \nre\core\Response  $response   Current response
         */
        public function preFilter(\nre\core\Request $request, \nre\core\Response $response)
        {
            parent::preFilter($request, $response);

            // Get Seminary and Character data
            try {
                self::$seminary = $this->Seminaries->getSeminaryByUrl($this->request->getParam(3));
                if(!is_null(self::$user))
                {
                    self::$character = $this->Characters->getCharacterForUserAndSeminary(self::$user['id'], self::$seminary['id']);
                    self::$character['characterroles'] = array_map(function($r) { return $r['name']; }, $this->Characterroles->getCharacterrolesForCharacterById(self::$character['id']));
                    try {
                        self::$character['xplevel'] = $this->Xplevels->getXPLevelById(self::$character['xplevel_id']);
                        self::$character['avatar'] = $this->Avatars->getAvatarByTypeAndLevel(self::$seminary['id'], self::$character['charactertype_url'], self::$character['xplevel']['level']);
                    }
                    catch(\nre\exceptions\IdNotFoundException $e) {
                        // No Avatar available
                    }
                    if(!is_null(self::$character['charactertitle_id']) && !is_null(self::$character['gender']))
                    {
                        $title = $this->Charactertitles->getTitleById(self::$character['charactertitle_id']);
                        self::$character['title'] = $title[(self::$character['gender']) ? 'title_male' : 'title_female'];
                    }
                }
            }
            catch(\nre\exceptions\IdNotFoundException $e) {
            }

            // Check permissions
            $this->checkPermission($request, $response);

            // Check achievements
            $this->checkAchievements($request, 'date');
            $this->checkAchievements($request, 'achievement');

            // Set Seminary and Character data
            $this->set('loggedSeminary', self::$seminary);
            $this->set('loggedCharacter', self::$character);
        }


        /**
         * Postfilter that is executed after running the Controller.
         *
         * @param   \nre\core\Request   $request    Current request
         * @param   \nre\core\Response  $response   Current response
         */
        public function postFilter(\nre\core\Request $request, \nre\core\Response $response)
        {
            parent::postFilter($request, $response);
        }


        /**
         * Check user permissions.
         *
         * @throws AccessDeniedException
         * @param   \nre\core\Request   $request    Current request
         * @param   \nre\core\Response  $response   Current response
         */
        private function checkPermission(\nre\core\Request $request, \nre\core\Response $response)
        {
            // Do not check index page
            if(is_null($request->getParam(3))) {
                return;
            }


            // Determine permissions for current action
            $action = $this->request->getParam(2, 'action');
            if(!property_exists($this, 'seminaryPermissions')) {
                return; // Allow if nothing is specified
            }
            if(!array_key_exists($action, $this->seminaryPermissions)) {
                return; // Allow if Action is not specified
            }
            $permissions = $this->seminaryPermissions[$action];


            // Check permissions
            if(is_null(self::$character) || !array_key_exists('characterroles', self::$character) || count(array_intersect(self::$character['characterroles'], $permissions)) == 0) {
                throw new \nre\exceptions\AccessDeniedException();
            }
        }


        /**
         * Check for newly achieved Achievements.
         *
         * @param   \nre\core\Request   $request            Current request
         * @param   array               $checkConditions    Conditions to check
         */
        protected function checkAchievements(\nre\core\Request $request, $checkConditions=null)
        {
            // Do not check MediaController
            if($request->getParam(0, 'toplevel') != \nre\configs\AppConfig::$defaults['toplevel']) {
                return;
            }

            // Check if Character is present
            if(is_null(self::$character)) {
                return;
            }

            // Check Achievements
            $achievements = $this->Achievement->checkAchievements(
                self::$seminary['id'],
                self::$character['id'],
                $checkConditions
            );

            // Add notifications
            foreach($achievements as &$achievement)
            {
                $this->Notification->addNotification(
                    \hhu\z\controllers\components\NotificationComponent::TYPE_ACHIEVEMENT,
                    $achievement['title'],
                    $this->linker->link(array('achievements', 'index', self::$seminary['url']), 0, true, null, true, $achievement['url']),
                    (!is_null($achievement['achieved_achievementsmedia_id']) ? $this->linker->link(array('media','achievement',self::$seminary['url'],$achievement['url'])) : null)
                );
            }
        }

    }

?>