+ * Set the delivery status for a given inbox
+ *
+ * @param string $url The URL of the inbox
+ * @param boolean $success Transmission status
+ */
+ static private function setInboxStatus($url, $success)
+ {
+ $now = DateTimeFormat::utcNow();
+
+ $status = DBA::selectFirst('inbox-status', [], ['url' => $url]);
+ if (!DBA::isResult($status)) {
+ DBA::insert('inbox-status', ['url' => $url, 'created' => $now]);
+ $status = DBA::selectFirst('inbox-status', [], ['url' => $url]);
+ }
+
+ if ($success) {
+ $fields = ['success' => $now];
+ } else {
+ $fields = ['failure' => $now];
+ }
+
+ if ($status['failure'] > DBA::NULL_DATETIME) {
+ $new_previous_stamp = strtotime($status['failure']);
+ $old_previous_stamp = strtotime($status['previous']);
+
+ // Only set "previous" with at least one day difference.
+ // We use this to assure to not accidentally archive too soon.
+ if (($new_previous_stamp - $old_previous_stamp) >= 86400) {
+ $fields['previous'] = $status['failure'];
+ }
+ }
+
+ if (!$success) {
+ if ($status['success'] <= DBA::NULL_DATETIME) {
+ $stamp1 = strtotime($status['created']);
+ } else {
+ $stamp1 = strtotime($status['success']);
+ }
+
+ $stamp2 = strtotime($now);
+ $previous_stamp = strtotime($status['previous']);
+
+ // Archive the inbox when there had been failures for five days.
+ // Additionally ensure that at least one previous attempt has to be in between.
+ if ((($stamp2 - $stamp1) >= 86400 * 5) && ($previous_stamp > $stamp1)) {
+ $fields['archive'] = true;
+ }
+ } else {
+ $fields['archive'] = false;
+ }
+
+ DBA::update('inbox-status', $fields, ['url' => $url]);
+ }
+
+ /**
+ * Fetches JSON data for a user