+
+/**
+ * @brief Checks if the communication with a given contact had problems recently
+ *
+ * @param int $cid Contact id
+ *
+ * @return bool The communication with this contact has currently problems
+ */
+function was_recently_delayed($cid) {
+
+ $was_delayed = false;
+
+ // Are there queue entries that were recently added?
+ $r = q("SELECT `id` FROM `queue` WHERE `cid` = %d
+ AND `last` > UTC_TIMESTAMP() - interval 15 minute LIMIT 1",
+ intval($cid)
+ );
+
+ $was_delayed = dbm::is_result($r);
+
+ // We set "term-date" to a current date if the communication has problems.
+ // If the communication works again we reset this value.
+ if ($was_delayed) {
+ $r = q("SELECT `term-date` FROM `contact` WHERE `id` = %d AND `term-date` <= '1000-01-01' LIMIT 1",
+ intval($cid)
+ );
+ $was_delayed = !dbm::is_result($r);
+ }
+
+ return $was_delayed;
+}
+
+
+function add_to_queue($cid,$network,$msg,$batch = false) {
+
+ $max_queue = get_config('system','max_contact_queue');
+ if($max_queue < 1)
+ $max_queue = 500;
+
+ $batch_queue = get_config('system','max_batch_queue');
+ if($batch_queue < 1)
+ $batch_queue = 1000;
+
+ $r = q("SELECT COUNT(*) AS `total` FROM `queue` INNER JOIN `contact` ON `queue`.`cid` = `contact`.`id`
+ WHERE `queue`.`cid` = %d AND `contact`.`self` = 0 ",
+ intval($cid)
+ );
+ if($r && count($r)) {
+ if($batch && ($r[0]['total'] > $batch_queue)) {
+ logger('add_to_queue: too many queued items for batch server ' . $cid . ' - discarding message');
+ return;
+ }
+ elseif((! $batch) && ($r[0]['total'] > $max_queue)) {
+ logger('add_to_queue: too many queued items for contact ' . $cid . ' - discarding message');
+ return;
+ }
+ }
+
+ q("INSERT INTO `queue` ( `cid`, `network`, `created`, `last`, `content`, `batch`)
+ VALUES ( %d, '%s', '%s', '%s', '%s', %d) ",
+ intval($cid),
+ dbesc($network),
+ dbesc(datetime_convert()),
+ dbesc(datetime_convert()),
+ dbesc($msg),
+ intval(($batch) ? 1: 0)
+ );
+
+}