<?php
/**
 * Copyright 2006, 2007, 2008, 2009 Eric D. Hough (http://ehough.com)
 * 
 * This file is part of TubePress (http://tubepress.org)
 * 
 * TubePress 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.
 * 
 * TubePress 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 TubePress.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

function_exists('tubepress_load_classes')
    || require(dirname(__FILE__) . '/../../../tubepress_classloader.php');
tubepress_load_classes(array('org_tubepress_url_UrlBuilder',
    'org_tubepress_options_category_Gallery',
    'org_tubepress_gallery_Gallery',
    'org_tubepress_options_manager_OptionsManager',
    'org_tubepress_options_category_Advanced',
    'org_tubepress_options_category_Display',
    'org_tubepress_options_category_Embedded',
    'org_tubepress_options_category_Meta',
    'net_php_pear_Net_URL2',
    'org_tubepress_options_category_Feed'));

/**
 * Builds URLs to send out to YouTube for gdata
 *
 */
class org_tubepress_url_SimpleUrlBuilder implements org_tubepress_url_UrlBuilder
{
    private $_tpom;
    
    /**
     * Builds a gdata request url for a list of videos
     *
     * @return string The gdata request URL for this gallery
     */
    public function buildGalleryUrl($currentPage)
    {
        $url = "";
        
        switch ($this->_tpom->get(org_tubepress_options_category_Gallery::MODE)) {
            
        case org_tubepress_gallery_Gallery::USER:
            $url = "users/" . $this->_tpom->get(org_tubepress_options_category_Gallery::USER_VALUE) .
                "/uploads";
            break;
            
        case org_tubepress_gallery_Gallery::TOP_RATED:
            $url = "standardfeeds/top_rated?time=" . 
                $this->_tpom->get(org_tubepress_options_category_Gallery::TOP_RATED_VALUE);
            break;
            
        case org_tubepress_gallery_Gallery::POPULAR:
            $url = "standardfeeds/most_viewed?time=" . 
                $this->_tpom->get(org_tubepress_options_category_Gallery::MOST_VIEWED_VALUE);
            break;
            
        case org_tubepress_gallery_Gallery::PLAYLIST:
            $url = "playlists/" . 
                $this->_tpom->get(org_tubepress_options_category_Gallery::PLAYLIST_VALUE);
            break;
                
        case org_tubepress_gallery_Gallery::MOST_RESPONDED:
            $url = "standardfeeds/most_responded";
            break;
              
        case org_tubepress_gallery_Gallery::MOST_RECENT:
            $url = "standardfeeds/most_recent";
            break;
                
        case org_tubepress_gallery_Gallery::MOST_LINKED:
            $url = "standardfeeds/most_linked";
            break;
                
        case org_tubepress_gallery_Gallery::MOST_DISCUSSESD:
            $url = "standardfeeds/most_discussed";
            break;
                
        case org_tubepress_gallery_Gallery::MOBILE:
            $url = "standardfeeds/watch_on_mobile";
            break;
               
        case org_tubepress_gallery_Gallery::FAVORITES:
            $url = "users/" . $this->_tpom->get(org_tubepress_options_category_Gallery::FAVORITES_VALUE) .
                "/favorites";
            break;
                
        case org_tubepress_gallery_Gallery::TAG:
            $tags = $this->_tpom->get(org_tubepress_options_category_Gallery::TAG_VALUE);
            $tags = explode(" ", $tags);
            $url  = "videos?q=" . implode("+", $tags);
            break;
                                
        default:
            $url = "standardfeeds/recently_featured";
            break;
        }

        $request = "http://gdata.youtube.com/feeds/api/$url";
        $this->_urlPostProcessing($request, $currentPage);
        return $request;
        //return str_replace("&", "&amp;", $request);
    }
    
/**
     * Appends some global query parameters on the request
     * before we fire it off to YouTube
     *
     * @param string                  &$request The request to be manipulated
     * 
     * @return void
     */
    private function _urlPostProcessing(&$request, $currentPage)
    {
        
        $perPage   = $this->_tpom->get(org_tubepress_options_category_Display::RESULTS_PER_PAGE);
        $filter    = $this->_tpom->get(org_tubepress_options_category_Feed::FILTER);
        $order     = $this->_tpom->get(org_tubepress_options_category_Display::ORDER_BY);
        $mode      = $this->_tpom->get(org_tubepress_options_category_Gallery::MODE);
        $embedOnly = $this->_tpom->get(org_tubepress_options_category_Feed::EMBEDDABLE_ONLY);
        
        /* start index of the videos */
        $start = ($currentPage * $perPage) - $perPage + 1;
        
        $requestURL = new net_php_pear_Net_URL2($request);
        $requestURL->setQueryVariable("v", 2);
        $requestURL->setQueryVariable("start-index", $start);
        $requestURL->setQueryVariable("max-results", $perPage);
        
        $requestURL->setQueryVariable("safeSearch", $filter);
      
        if ($order != "random") {
            $requestURL->setQueryVariable("orderby", $order);
        }
        
        /* YouTube API client ID and developer keys */
        $requestURL->setQueryVariable("client", $this->_tpom->get(org_tubepress_options_category_Feed::CLIENT_KEY));
        $requestURL->setQueryVariable("key", $this->_tpom->get(org_tubepress_options_category_Feed::DEV_KEY));

        if ($embedOnly) {
            $requestURL->setQueryVariable("format", "5");
        }
        
        $request = $requestURL->getURL();
    }
    
    public function buildSingleVideoUrl($id)
    {
        $requestURL = new net_php_pear_Net_URL2("http://gdata.youtube.com/feeds/api/videos");
        $requestURL->setQueryVariable("q", $id);
        $requestURL->setQueryVariable("max-results", 1);
        
           return $requestURL->getURL();
    }
    
    public function setOptionsManager(org_tubepress_options_manager_OptionsManager $tpom)
    { 
        $this->_tpom = $tpom; 
    }
}