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Get a complete list of playlists for a YouTube user through the API

So, here is my code for getting youtube user’s public playlists:

function getyoutubeplaylists($userName) {
$yt = connectyoutube();
$yt->setMajorProtocolVersion(2);
$playlistListFeed = $yt->getPlaylistListFeed($userName);
foreach ($playlistListFeed as $playlistListEntry) {
    $playlist['title'] = $playlistListEntry->title->text;
    $playlist['id'] = $playlistListEntry->getPlaylistID();
    $playlists[] = $playlist;
    $playlistVideoFeed = $yt->getPlaylistVideoFeed($playlistListEntry->getPlaylistVideoFeedUrl());
    foreach ($playlistVideoFeed as $videoEntry) {
        $playlist_assignment['youtube_id'] = substr($videoEntry->getVideoWatchPageUrl(),31,11);
        $playlist_assignment['id'] = $playlist['id'];
        $playlist_assignments[] = $playlist_assignment;
    }
}
$everything['playlists'] = $playlists;
$everything['playlist_assignments'] = $playlist_assignments;
return $everything;
}

The problem is that it only gets the first page or results. Any ideas on how to use Zend Gdata to get the next page of results?

The raw gdata XML shows the required URLs:

<link rel="self" type="application/atom+xml" href="http://gdata.youtube.com/feeds/api/users/pennstate/playlists?start-index=1&amp;max-results=25"/>
<link rel="next" type="application/atom+xml" href="http://gdata.youtube.com/feeds/api/users/pennstate/playlists?start-index=26&amp;max-results=25"/>

However, getPlaylistListFeed has no parameters for specifying "start-index" or "max-results".

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3 answers

It looks like you want to follow the Dev Pagination Example Guide .

+1

Zend , .

 $playlistListFeed = $yt->retrieveAllEntriesForFeed($yt->getPlaylistListFeed($userName));
+2

, -, , , . , , Zend_Gdata_YouTube:: Magento. "", , . : Magento .

php, var/export. app/Mage.php.

<?
$userName='cacycleworksdotcom';
$yt = new Zend_Gdata_YouTube();
//////////////////////////////////////////////////////////////////////
// Get playlists.
$playlistListFeed = $yt->retrieveAllEntriesForFeed($yt->getPlaylistListFeed($userName));
$playlist=Array();
$videoEntry=NULL;
$playlistvideos=Array();

Zend $playlistListFeed.

foreach ($playlistListFeed as $idx=>$playlistListEntry) {
    // process each playlist
    $playlists[$idx]['title'] = $playlistListEntry->title->text;
    $url=$playlistListEntry->getSelfLink()->href;
    $id=explode("/PL",$url);
    $playlists[$idx]['id'] = $id[1];
    $playlistVideoFeed = $yt->getPlaylistVideoFeed($playlistListEntry->getPlaylistVideoFeedUrl());
    $playlists[$idx]['time']=0;
    $playlists[$idx]['views']=0;
    $playlists[$idx]['rating']=0;

, , . , , .

    foreach ($playlistVideoFeed as $videoEntry) {
        // info of each video inside this playlist
        $_id=substr($videoEntry->getVideoWatchPageUrl(),31,11);
        $playlistvideos[]=$_id;
        $_url=$videoEntry->getVideoWatchPageUrl();
        $playlists[$idx]['videos'][$_id]=$_url;
        $playlists[$idx]['time']+=$videoEntry->getVideoDuration();
        $_views=$videoEntry->getVideoViewCount();
        if( $_views > $playlists[$idx]['views'] )
            $playlists[$idx]['views']=$_views;
        $_rating=$videoEntry->getRating()->average;
        if( $_rating > $playlists[$idx]['rating'] )
            $playlists[$idx]['rating']=$_rating;
    }

XML, .

    $xml=$playlistListEntry->getXML();
    // $playlists[$idx]['xml']=$xml;    // store original XML for now
    $xml = simplexml_load_string($xml); // transfer into object
    $attrs=$xml->group->thumbnail[1];
    $playlists[$idx]['thumb']=(string)$attrs['url'];
    //                                1st vid id         playlist id
    // http://www.youtube.com/watch?v=mcnIAErKc-g&list=PLEDADE9CA0E65BA78
    $videoid=array_keys( $playlists[$idx]['videos']);
    $videoid=$videoid[0];
    $playlists[$idx]['url'] = "http://www.youtube.com/watch?v=$videoid&list=PL".$playlists[$idx]['id'];     
}

, , :

//////////////////////////////////////////////////////////////////////
// Videos themselves
$idx=count($playlists);
$userFeed = $yt->getUserUploads($userName);
foreach ($userFeed as $videoEntry) {
    $idx++;
    $_id=substr($videoEntry->getVideoWatchPageUrl(),31,11);
    if( ! in_array($_id, $playlistvideos) ) {
        $_url=$videoEntry->getVideoWatchPageUrl();
        $playlists[$idx]['id']=$_id;
        $playlists[$idx]['url']=$_url;
        $playlists[$idx]['title']=$videoEntry->title->text;
        $playlists[$idx]['views']=$videoEntry->getVideoViewCount();
        $playlists[$idx]['rating']=$videoEntry->getRating()->average;
        $thumbs=$videoEntry->getVideoThumbnails();
        // these need resizing to width="320" height="180"
        $playlists[$idx]['thumb']=$thumbs[0]['url'];
        $playlists[$idx]['time']=$videoEntry->getVideoDuration();
    } // else { echo "$_id already in playlist\n";  }
}

youtube, - , , , . , . , .

//////////////////////////////////////////////////////////////////////
// http://www.the-art-of-web.com/php/sortarray/
function orderBy($data, $field) {
    $code = "return strnatcmp(\$a['$field'], \$b['$field']);";
    //  swap $a and $b to make descending instead of ascending
    usort($data, create_function('$b,$a', $code)); //('$a,$b', $code));
    return $data;
}
$playlists = orderBy($playlists, 'views');
//////////////////////////////////////////////////////////////////////
echo "\n\n";
print_r($playlists);

, GData YouTube Zend:

echo "\n\n";
show_methods($videoEntry);
echo "\n\n";
show_methods($playlistListFeed[0]);
echo "\n\n";
show_methods($playlistListFeed);

function show_methods( $_a ) {
    echo "<h3>Methods for ".get_class($_a)."</h3>";
    $_a= get_class_methods($_a);
    $_a=array_unique($_a);
    array_multisort(&$_a);
    $i=0;
    foreach( $_a as $method ) {
        $i++;
        printf("%-30.30s",$method);
        if($i%5==0)
            echo "\n";
    }
}

Here are two of the array entries to show the structure. Please note that playlists have a key videoswith an array of videos inside it. Testing the keys videoscan tell you a playlist. url- this is what your user can click to open a video or playlist on YouTube.

[1] => Array
    (
        [title] => Ducatitech.com "HowTo" Adjust your Valves
        [id] => 970EC735D36A95E8
        [time] => 855
        [views] => 144847
        [rating] => 4.9322033
        [videos] => Array
            (
                [dIj3nSJGPZw] => http://www.youtube.com/watch?v=dIj3nSJGPZw&feature=youtube_gdata_player
                [3WQY1MRlmH4] => http://www.youtube.com/watch?v=3WQY1MRlmH4&feature=youtube_gdata_player
            )

        [thumb] => http://i.ytimg.com/vi/dIj3nSJGPZw/mqdefault.jpg
        [url] => http://www.youtube.com/watch?v=dIj3nSJGPZw&list=PL970EC735D36A95E8
            )

        [thumb] => http://i.ytimg.com/vi/mcnIAErKc-g/mqdefault.jpg
        [url] => http://www.youtube.com/watch?v=mcnIAErKc-g&list=PLEDADE9CA0E65BA78
    )
[7] => Array
    (
        [id] => 80yCiFkOB9g
        [url] => http://www.youtube.com/watch?v=80yCiFkOB9g&feature=youtube_gdata_player
        [title] => Ducatitech.com: ExactFit Timing Belt Tensile Test
        [views] => 7589
        [rating] => 4.25
        [thumb] => http://i.ytimg.com/vi/80yCiFkOB9g/0.jpg
        [time] => 625
    )

And finally, the kind of things you get from show_methods():

Methods for Zend_Gdata_YouTube_VideoEntry

__construct                   __get                         __isset                       __set                         __toString                    
__unset                       addVideoDeveloperTag          delete                        encode                        ensureMediaGroupIsNotNull     
flushNamespaceLookupCache     getAlternateLink              getAuthor                     getCategory                   getComments                   
getContent                    getContributor                getControl                    getDOM                        getEditLink                   
getEtag                       getExtensionAttributes        getExtensionElements          getFeedLink                   getFlashPlayerUrl             
getHttpClient                 getId                         getLicenseLink                getLink                       getLocation                   
getMajorProtocolVersion       getMediaGroup                 getMediaSource                getMinorProtocolVersion       getNextLink                   
getNoEmbed                    getPreviousLink               getPublished                  getRacy                       getRating                     
getRecorded                   getRights                     getSelfLink                   getService                    getSource                     
getStatistics                 getSummary                    getText                       getTitle                      getTitleValue                 
getUpdated                    getVideoCategory              getVideoCommentFeedUrl        getVideoComplaintsLink        getVideoDescription           
getVideoDeveloperTags         getVideoDuration              getVideoGeoLocation           getVideoId                    getVideoRatingInfo            
getVideoRatingsLink           getVideoRecorded              getVideoResponsesLink         getVideoState                 getVideoTags                  
getVideoThumbnails            getVideoTitle                 getVideoViewCount             getVideoWatchPageUrl          getWhere                      
getXML                        isVideoEmbeddable             isVideoPrivate                lookupNamespace               registerAllNamespaces
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