public function getLatestThumbsUrls()
{
global $wgMemc;
$thumbUrls = $wgMemc->get(LatestPhotosController::memcacheKey());
if (empty($thumbUrls)) {
// api service
$helper = new LatestPhotosHelper();
$params = ['action' => 'query', 'list' => 'logevents', 'letype' => 'upload', 'leprop' => 'title', 'lelimit' => 50];
$apiData = ApiService::call($params);
if (empty($apiData)) {
$this->response->setVal('thumbUrls', false);
}
$imageList = $apiData['query']['logevents'];
$fileList = array_map([$helper, "getImageData"], $imageList);
$fileList = array_filter($fileList, [$helper, "filterImages"]);
// make sure the list of images is unique and limited to 11 images (12 including the see all image)
$shaList = [];
$uniqueList = [];
foreach ($fileList as $data) {
$sha = $data['file']->sha1;
if (!array_key_exists($sha, $shaList) && $data['file']->media_type != 'VIDEO') {
$shaList[$sha] = true;
$uniqueList[] = $data;
}
if (count($uniqueList) > 10) {
break;
}
}
$thumbUrls = array_map(array($helper, 'getTemplateData'), $uniqueList);
$wgMemc->set(self::memcacheKey(), $thumbUrls);
}
$this->response->setVal('thumbUrls', $thumbUrls);
}
private static function avoidUpdateRace()
{
global $wgMemc;
// avoid a race in update event propgation by deleting key after 10 seconds
// Memcache delete with a timeout is not implemented, but we can use set to fake it
$thumbUrls = $wgMemc->get(LatestPhotosController::memcacheKey());
if (!empty($thumbUrls)) {
$wgMemc->set(LatestPhotosController::memcacheKey(), $thumbUrls, 10);
}
}
public static function onMessageCacheReplace($title, $text) {
global $wgMemc;
if ($title == self::BLACKLIST_MESSAGE) {
wfDebug(__METHOD__ . ": photos blacklist has been updated\n");
$wgMemc->delete(LatestPhotosController::memcacheKey());
}
return true;
}
