/**
* Returns script code for detecting whether WCPP is installed at the client machine.
*
* The WCPP-detection script code ends with a 'success' or 'failure' status.
* You can handle both situation by creating two javascript functions which names
* must be wcppDetectOnSuccess() and wcppDetectOnFailure().
* These two functions will be automatically invoked by the WCPP-detection script code.
*
* The WCPP-detection script uses a delay time variable which by default is 10000 ms (10 sec).
* You can change it by creating a javascript global variable which name must be wcppPingDelay_ms.
* For example, to use 5 sec instead of 10, you should add this to your script:
*
* var wcppPingDelay_ms = 5000;
*
* @return string A [script] tag linking to the WCPP-detection script code.
* @throws Exception
*/
public static function createWcppDetectionScript()
{
if (Utils::isNullOrEmptyString(self::$webClientPrintAbsoluteUrl)) {
throw new Exception('WebClientPrint absolute URL is missing, please specify it.');
}
$buffer = '<script type="text/javascript">';
if (Utils::isIE6to9() || Utils::isIE10orGreater()) {
$buffer .= 'var wcppPingNow=false;';
} else {
$buffer .= 'var wcppPingNow=true;';
}
$buffer .= '</script>';
$wcpHandler = self::$webClientPrintAbsoluteUrl . '?' . self::WCP . '&d=' . session_id();
$buffer .= '<script src="' . $wcpHandler . '" type="text/javascript"></script>';
if (Utils::isIE6to9() || Utils::isIE10orGreater()) {
$crlf = chr(13) . chr(10);
$buffer .= $crlf . $crlf;
$buffer .= '<!--[if WCPP]>' . $crlf;
$buffer .= '<script type="text/javascript">' . $crlf;
$buffer .= '$(document).ready(function(){jsWCPP.ping();});' . $crlf;
$buffer .= '</script>' . $crlf;
$buffer .= '<![endif]-->' . $crlf;
$buffer .= '<!--[if !WCPP]>' . $crlf;
$buffer .= '<script type="text/javascript">' . $crlf;
$buffer .= '$(document).ready(function(){wcppDetectOnFailure();});' . $crlf;
$buffer .= '</script>' . $crlf;
$buffer .= '<![endif]-->' . $crlf;
}
return $buffer;
}
