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DataUrlTwigExtension.php
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DataUrlTwigExtension.php
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<?php
namespace CryptoCompress\TwigBundle\Extension;
class DataUrlTwigExtension extends \Twig_Extension {
/**
* Return extension name.
*
* @return string
*/
public function getName()
{
return 'data_url_twig_extension';
}
/**
* Register dataUrl filters.
*
* @return array
*/
public function getFilters() {
return array(
'dataUrl' => new \Twig_Filter_Method($this, 'dataUrl'),
'dataUrlResource' => new \Twig_Filter_Method($this, 'dataUrlResource'),
'dataUrlBinary' => new \Twig_Filter_Method($this, 'dataUrlBinary'),
);
}
/**
* Return dataUrl string (base64 encoded) for given file(path).
*
* @param type $binaryString
* @param type $mimeType
* @param array $parameters
*
* @return string
*/
public function dataUrl($file, $mimeType = null, array $parameters = array())
{
return $this->build(file_get_contents($file), $mimeType, $parameters);
}
/**
* Return dataUrl string (base64 encoded).
*
* @param type $binaryString
* @param type $mimeType
* @param array $parameters
*
* @return string
*/
public function dataUrlBinary($binaryString, $mimeType = null, array $parameters = array())
{
return $this->build($binaryString, $mimeType, $parameters);
}
/**
* DO NOT USE THIS!
* $resource never closed!
*
* @param type $resource
* @param type $mimeType
* @param array $parameters
*
* @return string
*/
public function dataUrlResource($resource, $mimeType = null, array $parameters = array())
{
$binaryString = '';
while(!feof($resource)) {
$binaryString .= fread($resource, 8192);
}
return $this->build($binaryString, $mimeType, $parameters);
}
/**
* Return dataUrl string (base64 encoded).
*
* @see http://tools.ietf.org/html/rfc2397
*
* @param type $data
* @param type $mimeType
* @param array $parameters
*
* @return string
*/
protected function build($data, $mimeType = null, array $parameters = array())
{
$dataUrl = 'data:' . $mimeType;
foreach ($parameters as $name => $value) {
$dataUrl .= ';' . $name . '=' . $value;
}
return $dataUrl . ';base64,' . base64_encode($data);
}
}