/**
* Downloads image from picnik (or can be used for any url, really) and stores it at a file named $destination -- primarily a wrapper for PostToRemoteFileAndGetResponse with built-in file writing and error handling
*
* @param string $url
* @param string $destination (optional)
* @return string|bool Returns the filename the image was saved to, or false if anything went wrong
*/
public function downloadToFile($url, $destination = false, &$errorType = null)
{
$result = PostToRemoteFileAndGetResponse($url);
if (!$destination) {
// generate a random name for our downloaded file and store it in cache dir
while (true) {
// we can name it .tmp because the extension will be corrected after the image type is detected
$destination = ISC_CACHE_DIRECTORY . 'picnikimage_' . Interspire_String::generateRandomString(16) . '.tmp';
if (!file_exists($destination)) {
break;
}
}
}
$fh = fopen($destination, 'wb');
if ($fh) {
if (!fwrite($fh, $result)) {
fclose($fh);
$this->log->LogSystemError('general', 'Failed to write downloaded Picnik image to local file');
$errorType = 1;
return false;
}
fclose($fh);
isc_chmod($destination, ISC_WRITEABLE_FILE_PERM); // set the chmod just incase this was a new file
} else {
$this->log->LogSystemError('general', 'Failed to open local file for saving downloaded Picnik image');
$errorType = 2;
return false;
}
return $destination;
}
/**
* Generate a random string of characters to a specific length based on the specified selection of characters
*
* @param int $length
* @param string $selection
*/
public static function randomString($length, $selection = '0123456789abcdefghijklmnopqrstuvwxyz')
{
return Interspire_String::generateRandomString($length, $selection);
}
