public function compile()
{
$doc = JFactory::getDocument();
$headers = $doc->getHeadData();
$javascripts = JArrayHelper::getValue($headers, 'scripts');
$dest = JPath::clean($this->paths->get('js.compressed'));
$compile = $this->params->get('minify_js', 1);
$changed = (bool) $this->isJsUpdated();
JLog::add('Javascript cache changed: ' . ((bool) $changed ? 'true' : 'false'), JLog::DEBUG, $this->logger);
$force = (bool) ($compile == 2);
$changed = (bool) ($compile == 1 && $changed);
JLog::add('Force Javascript minification: ' . ((bool) $force ? 'true' : 'false'), JLog::DEBUG, $this->logger);
JLog::add('Minify Javascript: ' . ((bool) $changed ? 'true' : 'false'), JLog::DEBUG, $this->logger);
$uncompressed = '';
foreach (array_keys($javascripts) as $script) {
$url = new JUri($script);
if (!$url->getScheme()) {
$url = new JUri(JUri::base());
$url->setPath($script);
}
$key = str_replace(JUri::base(), JPATH_ROOT . '/', (string) $url);
if (array_search($key, $this->paths->get('js.uncompressed')) !== false) {
unset($headers['scripts'][$script]);
if (!JFile::exists($dest) || $changed || $force) {
JLog::add('Compressing: ' . $key . ' to ' . $dest, JLog::DEBUG, $this->logger);
$stream = new JStream();
$stream->open($key);
$response = $stream->read($stream->filesize());
$stream->close();
$uncompressed .= $response;
}
}
}
if ($uncompressed) {
file_put_contents($dest, JSMinPlus::minify($uncompressed, $dest));
$this->updateCache(self::CACHEKEY . '.files.js', $this->paths->get('js.uncompressed'));
}
// workaround. There needs to be at least one script.
if (count($headers['scripts']) == 0) {
$url = str_replace(JPATH_ROOT . '/', JUri::base(), $dest);
$headers['scripts'][$url] = array('mime' => 'text/javascript', 'defer' => false, 'async' => false);
}
$doc->setHeadData($headers);
}
