<?php

ini_set('include_path', '/path/to/study_db_google' . PATH_SEPARATOR . ini_get('include_path'));

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Gdata

 * @subpackage Demos

 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

/**

 * PHP sample code for the YouTube data API.  Utilizes the Zend Framework

 * Zend_Gdata component to communicate with the YouTube data API.

 *

 * Requires the Zend Framework Zend_Gdata component and PHP >= 5.1.4

 *

 * This sample is run from within a web browser.  These files are required:

 * index.php - the main logic, which interfaces with the YouTube API

 * interface.html - the HTML to represent the web UI

 * web_browser.css - the CSS to define the interface style

 * web_browser.js - the JavaScript used to provide the video list AJAX interface

 *

 * NOTE: If using in production, some additional precautions with regards

 * to filtering the input data should be used.  This code is designed only

 * for demonstration purposes.

 */

/**

 * @see Zend_Loader

 */

require_once 'Zend/Loader.php';

/**

 * @see Zend_Gdata_YouTube

 */

Zend_Loader::loadClass('Zend_Gdata_YouTube');

/**

 * Finds the URL for the flash representation of the specified video

 *

 * @param  Zend_Gdata_YouTube_VideoEntry $entry The video entry

 * @return string|null The URL or null, if the URL is not found

 */

function findFlashUrl($entry)

{

    foreach ($entry->mediaGroup->content as $content) {

        if ($content->type === 'application/x-shockwave-flash') {

            return $content->url;

        }

    }

    return null;

}

/**

 * Returns a feed of top rated videos for the specified user

 *

 * @param  string $user The username

 * @return Zend_Gdata_YouTube_VideoFeed The feed of top rated videos

 */

function getTopRatedVideosByUser($user)

{

    $userVideosUrl = 'http://gdata.youtube.com/feeds/users/' .

                     $user . '/uploads';

    $yt = new Zend_Gdata_YouTube();

    $ytQuery = $yt->newVideoQuery($userVideosUrl);

    // order by the rating of the videos

    $ytQuery->setOrderBy('rating');

    // retrieve a maximum of 5 videos

    $ytQuery->setMaxResults(5);

    // retrieve only embeddable videos

    $ytQuery->setFormat(5);

    return $yt->getVideoFeed($ytQuery);

}

/**

 * Returns a feed of videos related to the specified video

 *

 * @param  string $videoId The video

 * @return Zend_Gdata_YouTube_VideoFeed The feed of related videos

 */

function getRelatedVideos($videoId)

{

    $yt = new Zend_Gdata_YouTube();

    $ytQuery = $yt->newVideoQuery();

    // show videos related to the specified video

    $ytQuery->setFeedType('related', $videoId);

    // order videos by rating

    $ytQuery->setOrderBy('rating');

    // retrieve a maximum of 5 videos

    $ytQuery->setMaxResults(5);

    // retrieve only embeddable videos

    $ytQuery->setFormat(5);

    return $yt->getVideoFeed($ytQuery);

}

/**

 * Echo img tags for the first thumbnail representing each video in the

 * specified video feed.  Upon clicking the thumbnails, the video should

 * be presented.

 *

 * @param  Zend_Gdata_YouTube_VideoFeed $feed The video feed

 * @return void

 */

function echoThumbnails($feed)

{

    foreach ($feed as $entry) {

        $videoId = $entry->getVideoId();

        echo '<img src="' . $entry->mediaGroup->thumbnail[0]->url . '" ';

        echo 'width="80" height="72" onclick="ytvbp.presentVideo(\'' . $videoId . '\')">';

    }

}

/**

 * Echo the video embed code, related videos and videos owned by the same user

 * as the specified videoId.

 *

 * @param  string $videoId The video

 * @return void

 */

function echoVideoPlayer($videoId)

{

    $yt = new Zend_Gdata_YouTube();

    $entry = $yt->getVideoEntry($videoId);

    $videoTitle = $entry->mediaGroup->title;

    $videoUrl = findFlashUrl($entry);

    $relatedVideoFeed = getRelatedVideos($entry->getVideoId());

    $topRatedFeed = getTopRatedVideosByUser($entry->author[0]->name);

    print <<<END

    <b>$videoTitle</b><br />

    <object width="425" height="350">

      <param name="movie" value="${videoUrl}&autoplay=1"></param>

      <param name="wmode" value="transparent"></param>

      <embed src="${videoUrl}&autoplay=1" type="application/x-shockwave-flash" wmode="transparent"

        width=425" height="350"></embed>

    </object>

END;

    echo '<br />';

    echoVideoMetadata($entry);

    echo '<br /><b>Related:</b><br />';

    echoThumbnails($relatedVideoFeed);

    echo '<br /><b>Top rated videos by user:</b><br />';

    echoThumbnails($topRatedFeed);

}

/**

 * Echo video metadata

 *

 * @param  Zend_Gdata_YouTube_VideoEntry $entry The video entry

 * @return void

 */

function echoVideoMetadata($entry)

{

    $title = $entry->mediaGroup->title;

    $description = $entry->mediaGroup->description;

    $authorUsername = $entry->author[0]->name;

    $authorUrl = 'http://www.youtube.com/profile?user=' . $authorUsername;

    $tags = $entry->mediaGroup->keywords;

    $duration = $entry->mediaGroup->duration->seconds;

    $watchPage = $entry->mediaGroup->player[0]->url;

    $viewCount = $entry->statistics->viewCount;

    $rating = $entry->rating->average;

    $numRaters = $entry->rating->numRaters;

    $flashUrl = findFlashUrl($entry);

    print <<<END

    <b>Title:</b> ${title}<br />

    <b>Description:</b> ${description}<br />

    <b>Author:</b> <a href="${authorUrl}">${authorUsername}</a><br />

    <b>Tags:</b> ${tags}<br />

    <b>Duration:</b> ${duration} seconds<br />

    <b>View count:</b> ${viewCount}<br />

    <b>Rating:</b> ${rating} (${numRaters} ratings)<br />

    <b>Flash:</b> <a href="${flashUrl}">${flashUrl}</a><br />

    <b>Watch page:</b> <a href="${watchPage}">${watchPage}</a> <br />

END;

}

/**

 * Echo the list of videos in the specified feed.

 *

 * @param  Zend_Gdata_YouTube_VideoFeed $feed The video feed

 * @return void

 */

function echoVideoList($feed)

{

    echo '<table class="videoList">';

    echo '<tbody width="100%">';

    foreach ($feed as $entry) {

        $videoId = $entry->getVideoId();

        $thumbnailUrl = $entry->mediaGroup->thumbnail[0]->url;

        $videoTitle = $entry->mediaGroup->title;

        $videoDescription = $entry->mediaGroup->description;

        print <<<END

        <tr onclick="ytvbp.presentVideo('${videoId}')">

        <td width="130"><img src="${thumbnailUrl}" /></td>

        <td width="100%">

        <a href="#">${videoTitle}</a>

        <p class="videoDescription">${videoDescription}</p>

        </td>

        </tr>

END;

    }

    echo '</table>';

}

/*

 * The main controller logic of the YouTube video browser demonstration app.

 */

$queryType = isset($_POST['queryType']) ? $_POST['queryType'] : null;

if ($queryType === null) {

    /* display the entire interface */

    include 'interface.html';

} else if ($queryType == 'show_video') {

    /* display an individual video */

    if (array_key_exists('videoId', $_POST)) {

        $videoId = $_POST['videoId'];

        echoVideoPlayer($videoId);

    } else if (array_key_exists('videoId', $_GET)) {

        $videoId = $_GET['videoId'];

        echoVideoPlayer($videoId);

    } else {

        echo 'No videoId found.';

        exit;

    }

} else {

    /* display a list of videos */

    $searchTerm = $_POST['searchTerm'];

    $startIndex = $_POST['startIndex'];

    $maxResults = $_POST['maxResults'];

    $yt = new Zend_Gdata_YouTube();

    $query = $yt->newVideoQuery();

    $query->setQuery($searchTerm);

    $query->setStartIndex($startIndex);

    $query->setMaxResults($maxResults);

    /* check for one of the standard feeds, or list from 'all' videos */

    switch ($queryType) {

    case 'most_viewed':

        $query->setFeedType('most viewed');

        $query->setTime('this_week');

        $feed = $yt->getVideoFeed($query);

        break;

    case 'most_recent':

        $query->setFeedType('most recent');

        $feed = $yt->getVideoFeed($query);

        break;

    case 'recently_featured':

        $query->setFeedType('recently featured');

        $feed = $yt->getVideoFeed($query);

        break;

    case 'top_rated':

        $query->setFeedType('top rated');

        $query->setTime('this_week');

        $feed = $yt->getVideoFeed($query);

        break;

    case 'all':

        $feed = $yt->getVideoFeed($query);

        break;

    default:

        echo 'ERROR - unknown queryType - "' . $queryType . '"';

        break;

    }

    echoVideoList($feed);

}