/**
* Returns information about file in this repository by reference
* {@link repository::get_file_reference()}
* {@link repository::get_file()}
*
* Returns null if file not found or can not be accessed
*
* @param stdClass $reference file reference db record
* @return null|stdClass containing attribute 'filepath'
*/
public function get_file_by_reference($reference) {
$ref = unserialize(base64_decode($reference->reference));
$url = $this->appendtoken($ref->url);
if (!$url) {
// Occurs when the user isn't known..
return null;
}
// We use this cache to get the correct file size.
$cachedfilepath = cache_file::get($url, array('ttl' => 0));
if ($cachedfilepath === false) {
// Cache the file.
$path = $this->get_file($url);
$cachedfilepath = cache_file::create_from_file($url, $path['path']);
}
if ($cachedfilepath && is_readable($cachedfilepath)) {
return (object)array('filepath' => $cachedfilepath);
}
return null;
}
public function cron() {
$fs = get_file_storage();
$files = $fs->get_external_files($this->id);
foreach ($files as $file) {
$reference = unserialize($file->get_reference());
$cachedfile = cache_file::get($reference);
if ($cachedfile === false) {
// Re-fetch resource.
$this->set_access_key($reference->access_key);
$this->set_access_secret($reference->access_secret);
$path = $this->get_file($reference->path);
cache_file::create_from_file($reference, $path['path']);
}
}
}
