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<?php
/**
* SemanticScuttle - your social bookmark manager.
*
* PHP version 5.
*
* @category Bookmarking
* @package SemanticScuttle
* @author Christian Weiske <cweiske@cweiske.de>
* @license GPL http://www.gnu.org/licenses/gpl.html
* @link http://sourceforge.net/projects/semanticscuttle
*/
/**
* Show website thumbnails/screenshots using phancap
*
* @category Bookmarking
* @package SemanticScuttle
* @author Christian Weiske <cweiske@cweiske.de>
* @license GPL http://www.gnu.org/licenses/gpl.html
* @link http://sourceforge.net/projects/semanticscuttle
* @see http://cweiske.de/phancap.htm
*/
class SemanticScuttle_Thumbnailer_Phancap
{
/**
* Configuration array.
* Required keys:
* - url
* - token
* - secret
*/
protected $config = array();
/**
* Set phancap configuration
*
* @param array $config Phancap configuration
*
* @return void
*/
public function setConfig($config)
{
$this->config = $config;
}
/**
* Get the URL for a website thumbnail
*
* @param string $bookmarkUrl URL of website to create thumbnail for
* @param integer $width Screenshot width
* @param integer $height Screenshot height
*
* @return mixed FALSE when no screenshot could be obtained,
* string with the URL otherwise
*/
public function getThumbnailUrl($bookmarkUrl, $width, $height)
{
//default parameters for the phancap service
$parameters = array(
'url' => $bookmarkUrl,
'swidth' => $width,
'sheight' => $height,
'sformat' => 'jpg',
);
if (isset($this->config['token']) && $this->config['token'] != '') {
$parameters['atoken'] = $this->config['token'];
$parameters['atimestamp'] = time();
//create signature
ksort($parameters);
foreach ($parameters as $key => $value) {
$encparams[] = $key . '=' . rawurlencode($value);
}
$encstring = implode('&', $encparams);
$signature = hash_hmac('sha1', $encstring, $this->config['secret']);
//append signature to parameters
$parameters['asignature'] = $signature;
}
//url-encode the parameters
$urlParams = array();
foreach ($parameters as $key => $value) {
$urlParams[] = $key . '=' . urlencode($value);
}
//final URL
return $this->config['url'] . '?' . implode('&', $urlParams);
}
}
?>
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