/**
* Checks to see if cache exists and is the latest, if it does, return it
* It also checks to see if this is LESS cache and makes sure all imported files are the latest
*
* @param string $originalFile
* @param string $cacheFile
*
* @return bool|string|array
*/
protected function checkCache($originalFile, $cacheFile)
{
if (!($ret = parent::checkCache($originalFile, $cacheFile))) {
return false;
}
if (Utils::isSerialized($ret, $ret)) {
// Go through each file and make sure none of them have changed
foreach ($ret['files'] as $file => $lastModified) {
if (filemtime($file) > $lastModified) {
return false;
}
}
$ret = serialize($ret);
}
return $ret;
}
/**
* Overwrite the _setupFile function so placeholder images can be shown instead of broken images
*
*
* @param string $originalFile
* @param string $cacheFile
*/
protected function setupFile($originalFile, $cacheFile)
{
if (count($this->filters) > 0) {
$this->checkNumberOfAllowedFilters($cacheFile);
if ($this->options['checkReferrer']) {
$this->checkReferrer();
}
}
if (!file_exists($originalFile)) {
// If we are using a placeholder and that exists, use it!
if ($this->placeholder && file_exists($this->placeholder)) {
$originalFile = $this->placeholder;
}
}
parent::setupFile($originalFile, $cacheFile);
}
