public function getBookGdata($isbn_id)
{
$objGdata = new Zend_Gdata_Books();
$query = $objGdata->newVolumeQuery();
$isbnno = 'isbn:' . $isbn_id;
$query->setQuery($isbnno);
$feed = $objGdata->getVolumeFeed($query);
$thumbnail_img = null;
foreach ($feed as $entry) {
$thumbnailLink = $entry->getThumbnailLink();
if ($thumbnailLink) {
$thumbnail = $thumbnailLink->href;
} else {
$thumbnail = null;
}
$preview = $entry->getPreviewLink()->href;
$thumbnail_img = !$thumbnail ? '' : '<a href="' . $preview . '"><img src="' . $thumbnail . '"/></a>';
}
return $thumbnail_img;
}
}
if (isset($_GET['startIndex'])) {
$startIndex = $_GET['startIndex'];
$query->setStartIndex($startIndex);
}
if (isset($_GET['maxResults'])) {
$maxResults = $_GET['maxResults'];
$query->setMaxResults($maxResults);
}
if (isset($_GET['minViewability'])) {
$minViewability = $_GET['minViewability'];
$query->setMinViewability($minViewability);
}
/* check for one of the restricted feeds, or list from 'all' videos */
switch ($queryType) {
case 'full_view':
case 'partial_view':
$query->setMinViewability($queryType);
echo 'Requesting feed: ' . $query->getQueryUrl() . '<br><br>';
$feed = $books->getVolumeFeed($query);
break;
case 'all':
echo 'Requesting feed: ' . $query->getQueryUrl() . '<br><br>';
$feed = $books->getVolumeFeed($query);
break;
default:
echo 'ERROR - unknown queryType - "' . $queryType . '"';
break;
}
echoBookList($feed);
}