function sendUserMails($u)
{
    $uid = $u['id'];
    if (empty($u['email'])) {
        return;
    }
    $sendType = User::canSendNotifications($uid);
    if ($sendType == false) {
        return;
    }
    $coreName = Config::get('core_name');
    // $coreUrl = Config::get('core_url');
    $languages = Config::get('languages');
    $lang = $languages[$u['language_id'] - 1];
    if (filter_var($u['email'], FILTER_VALIDATE_EMAIL)) {
        //group mails into digest and separate ones (where user is mentioned)
        $mails = array('digest' => array(), 'separate' => array());
        foreach ($u['mails'] as $notificationId => $notification) {
            //[$core #$nodeId] $action_type $template_name: $object_title
            $templateId = Objects::getTemplateId($notification['object_id']);
            $templateName = Objects::getName($templateId);
            $subject = '[' . $coreName . ' #' . $notification['object_id'] . '] ' . Notifications::getActionDeclination($notification['action_type'], $lang) . ' ' . $templateName . ' "' . htmlspecialchars_decode($notification['data']['name']) . '"';
            $sender = Notifications::getSender($notification['from_user_id']);
            //divide notification into separate number of actions it consist of
            $actions = getNotificationActions($notification);
            for ($i = 0; $i < sizeof($actions); $i++) {
                $a = $actions[$i];
                $message = Notifications::getMailBodyForAction($a, $u);
                $isMentioned = !empty($a['data']['mentioned']) && in_array($uid, $a['data']['mentioned']);
                $mails[$isMentioned ? 'separate' : 'digest'][] = array('subject' => $subject, 'body' => $message, 'sender' => $sender, 'nId' => $notificationId);
            }
        }
        //merge digest emails group into one email and put it into separate group
        if (sizeof($mails['digest']) == 1) {
            $mails['separate'][] = $mails['digest'][0];
        } elseif (!empty($mails['digest'])) {
            $mail = array();
            $ids = array();
            $sender = '';
            foreach ($mails['digest'] as $m) {
                $mail[] = $m['body'];
                $sender = $m['sender'];
                $ids[] = $m['nId'];
            }
            $mails['separate'][] = array('subject' => '[' . $coreName . '] Notifications digest', 'body' => implode('<hr />', $mail), 'sender' => $sender, 'nId' => $ids);
        }
        foreach ($mails['separate'] as $mail) {
            echo $u['email'] . ': ' . $mail['subject'] . "\n";
            if (!mail($u['email'], $mail['subject'], $mail['body'], "Content-type: text/html; charset=utf-8\r\nFrom: " . $mail['sender'] . "\r\n")) {
                System::notifyAdmin('CaseBox cron notification: Cant send notification (' . $mail['nId'] . ') mail to "' . $u['email'] . '"', $mail['body']);
            } else {
                DM\Notifications::markAsSeen($mail['nId'], $uid);
            }
        }
        if (!empty($mails['digest'])) {
            User::setUserConfigParam('lastNotifyTime', Util\dateISOToMysql('now'), $uid);
        }
    }
}
 /**
  * test notifications module
  *
  * @return [type] [description]
  */
 public function testNotifications()
 {
     //check if everything is prepeared
     $this->assertTrue(sizeof($this->userIds) > 3, 'Less than 4 users created');
     $this->assertTrue(sizeof($this->objectIds) > 2, 'Less than 3 tasks created');
     //add a comment to obj 1 with user 1 referencing user 2
     $firstUserId = $this->userIds[0];
     $secondUserId = $this->userIds[1];
     $thirdUserId = $this->userIds[2];
     $forthUserId = $this->userIds[3];
     $rootUserId = $this->oldValues['user_id'];
     $pid = $this->objectIds[0];
     $commentData = array('pid' => $pid, 'template_id' => 9, 'data' => array('_title' => 'Hello to user @bow!'));
     $_SESSION['user']['id'] = $firstUserId;
     /* make a check - user should be denied to add comments */
     try {
         $commentId = $this->createObject($commentData);
     } catch (\Exception $e) {
         $msg = $e->getMessage();
         $this->assertTrue($msg == 'Access is denied', $msg);
     }
     $_SESSION['user']['id'] = $rootUserId;
     $this->addAllowSecurityRule();
     // try again adding a comment,
     // now it should work without access exceptions
     $_SESSION['user']['id'] = $firstUserId;
     $commentId = $this->createObject($commentData);
     $this->assertTrue(is_numeric($commentId), 'Wrong comment ID.');
     //check notifications for user bow,
     //he should receive 2 new notifications from root and andrew
     $this->assertTrue($this->checkLastNotification($secondUserId, array('user_id' => $firstUserId, 'object_id' => $pid, 'read' => 0)), 'Wrong last notification');
     //check notifications for root user, he also should receive a new notification from andrew
     //as owner of the object
     $this->assertTrue($this->checkLastNotification($rootUserId, array('user_id' => $firstUserId, 'object_id' => $pid, 'read' => 0)), 'No notification for root (owner) user.');
     //add comments with all 4 users and check notifications to cover
     //code for 3 and more users notifications grouping
     //and check root notifications with each comment
     for ($i = 0; $i < 4; $i++) {
         $_SESSION['user']['id'] = $this->userIds[$i];
         $commentData['data']['_title'] = 'Comment from user #' . $i . '.';
         $this->createObject($commentData);
         $this->assertTrue($this->checkLastNotification($rootUserId, array('user_id' => $this->userIds[$i], 'object_id' => $pid, 'read' => 0)), 'Wrong last notification for root from user #' . $i . '.');
     }
     $_SESSION['user']['id'] = $rootUserId;
     /*-------- answer back to previous comment with root and see if notifications are created */
     $commentData['data']['_title'] = 'Reply to Hellow comment.';
     $commentId = $this->createObject($commentData);
     //check notifications for all 4 users
     for ($i = 0; $i < 3; $i++) {
         $this->assertTrue($this->checkLastNotification($this->userIds[$i], array('object_id' => $pid, 'read' => 0)), 'Wrong last notification from root for user #' . $i . '.');
     }
     $this->checkMarkingNotificationsAsRead();
     //end of big testing schema
     //cover for now some simple code from Notifications
     $this->assertTrue(\CB\Notifications::getActionDeclination('reopen', 'en') == 'reopened', 'Declination not correct for reopen.');
     $this->assertTrue(\CB\Notifications::getActionDeclination('SomeWrongValue!>', 'en') == 'SomeWrongValue!>', 'Declination not correct for a wrong value.');
     $this->assertTrue(\CB\Notifications::getActionDeclination('file_upload', 'en') == 'uploaded a file to', 'Declination not correct for file_upload.');
     $this->assertTrue(\CB\Notifications::getActionDeclination('file_update', 'en') == 'updated a file in', 'Declination not correct for file_update.');
     //update a task and delete them all
     $obj = \CB\Objects::getCachedObject($pid);
     $data = $obj->getData();
     $data['data']['due_date'] = '2012-12-17T00:00:00Z';
     unset($data['data']['importance']);
     $data['data']['description'] .= ' *update* ';
     $obj->update($data);
     foreach ($this->objectIds as $id) {
         $obj->delete(false);
     }
     //get unset notifications and and access functions for preparing email
     $recs = DM\Notifications::getUnsent();
     foreach ($recs as $action) {
         $userData = \CB\User::getPreferences($action['to_user_id']);
         $sender = \CB\Notifications::getSender($action['from_user_id']);
         $body = \CB\Notifications::getMailBodyForAction($action, $userData);
     }
 }
     continue;
 }
 $lang = $languages[$u['language_id'] - 1];
 if (filter_var($u['email'], FILTER_VALIDATE_EMAIL)) {
     foreach ($u['mails'] as $notificationId => $action) {
         //[$core #$nodeId] $action_type $template_name: $object_title
         $templateId = Objects::getTemplateId($action['object_id']);
         $templateName = Objects::getName($templateId);
         $subject = '[' . $coreName . ' #' . $action['object_id'] . '] ' . Notifications::getActionDeclination($action['action_type'], $lang) . ' ' . $templateName . ' "' . htmlspecialchars_decode($action['data']['name']) . '"';
         //skip sending notifications from devel server to other emails than Admin
         if (!$sendNotificationMails && $u['email'] !== $adminEmail) {
             echo 'Devel skip: ' . $u['email'] . ': ' . $subject . "\n";
         } else {
             echo $u['email'] . ': ' . $subject . "\n";
             $message = Notifications::getMailBodyForAction($action, $u);
             $sender = Notifications::getSender($action['from_user_id']);
             // file_put_contents(TEMP_DIR . $action['id'].'.html', "$sender<br />\n<h1>$subject<h1>" . $message);
             //  COMMENTED FOR TEST
             if (!mail($u['email'], $subject, $message, "Content-type: text/html; charset=utf-8\r\nFrom: " . $sender . "\r\n")) {
                 $markNotificationAsSent = false;
                 System::notifyAdmin('CaseBox cron notification: Cant send notification (' . $notificationId . ') mail to "' . $u['email'] . '"', $message);
             } else {
                 DB\dbQuery('UPDATE notifications
                     SET email_sent = 1
                     WHERE id = $1', $notificationId) or die(DB\dbQueryError());
             }
         }
     }
 }
 DB\dbQuery('UPDATE crons
     SET last_action = CURRENT_TIMESTAMP