DiscussionsController::getCommentCounts PHP Method

    public function getCommentCounts()
    {
        $this->AllowJSONP(true);
        $vanilla_identifier = val('vanilla_identifier', $_GET);
        if (!is_array($vanilla_identifier)) {
            $vanilla_identifier = array($vanilla_identifier);
        }
        $vanilla_identifier = array_unique($vanilla_identifier);
        $FinalData = array_fill_keys($vanilla_identifier, 0);
        $Misses = array();
        $CacheKey = 'embed.comments.count.%s';
        $OriginalIDs = array();
        foreach ($vanilla_identifier as $ForeignID) {
            $HashedForeignID = ForeignIDHash($ForeignID);
            // Keep record of non-hashed identifiers for the reply
            $OriginalIDs[$HashedForeignID] = $ForeignID;
            $RealCacheKey = sprintf($CacheKey, $HashedForeignID);
            $Comments = Gdn::cache()->get($RealCacheKey);
            if ($Comments !== Gdn_Cache::CACHEOP_FAILURE) {
                $FinalData[$ForeignID] = $Comments;
            } else {
                $Misses[] = $HashedForeignID;
            }
        }
        if (sizeof($Misses)) {
            $CountData = Gdn::sql()->select('ForeignID, CountComments')->from('Discussion')->where('Type', 'page')->whereIn('ForeignID', $Misses)->get()->resultArray();
            foreach ($CountData as $Row) {
                // Get original identifier to send back
                $ForeignID = $OriginalIDs[$Row['ForeignID']];
                $FinalData[$ForeignID] = $Row['CountComments'];
                // Cache using the hashed identifier
                $RealCacheKey = sprintf($CacheKey, $Row['ForeignID']);
                Gdn::cache()->store($RealCacheKey, $Row['CountComments'], array(Gdn_Cache::FEATURE_EXPIRY => 60));
            }
        }
        $this->setData('CountData', $FinalData);
        $this->DeliveryMethod = DELIVERY_METHOD_JSON;
        $this->DeliveryType = DELIVERY_TYPE_DATA;
        $this->render();
    }