private function _applyActivityTopic($res, $tid, $uid, $data)
 {
     // from forum_misc.php
     require_once libfile('function/post');
     $activity = DzForumActivity::getActivityByTid($tid);
     if ($activity['expiration'] && $activity['expiration'] < TIMESTAMP) {
         return $this->_makeErrorInfo($res, 'activity_stop');
     }
     $applyinfo = DzForumActivityApply::getApplyByTidUid($tid, $uid);
     if ($applyinfo && $applyinfo['verified'] < DzForumActivityApply::STATUS_VERIFIED_IMPROVE) {
         return $this->_makeErrorInfo($res, 'activity_repeat_apply');
     }
     global $_G;
     $_GET = $data;
     $thread = ForumUtils::getTopicInfo($tid);
     $payvalue = intval($_GET['payvalue']);
     $payment = $_GET['payment'] ? $payvalue : -1;
     $message = cutstr(dhtmlspecialchars($_GET['message']), 200);
     $verified = $thread['authorid'] == $uid ? 1 : 0;
     $ufielddata = '';
     if ($activity['ufield']) {
         $ufielddata = array();
         $version = MobcentDiscuz::getMobcentDiscuzVersion();
         $activity['ufield'] = $version != MobcentDiscuz::VERSION_X20 ? dunserialize($activity['ufield']) : unserialize($activity['ufield']);
         if (!empty($activity['ufield']['userfield'])) {
             if ($version == MobcentDiscuz::VERSION_X20) {
                 if (!class_exists('discuz_censor')) {
                     include libfile('class/censor');
                 }
             }
             $censor = discuz_censor::instance();
             loadcache('profilesetting');
             foreach ($data as $key => $value) {
                 if (empty($_G['cache']['profilesetting'][$key])) {
                     continue;
                 }
                 if (is_array($value)) {
                     $value = implode(',', $value);
                 }
                 $value = cutstr(dhtmlspecialchars(trim($value)), 100, '.');
                 // if ($_G['cache']['profilesetting'][$key]['formtype'] == 'file' && !preg_match("/^https?:\/\/(.*)?\.(jpg|png|gif|jpeg|bmp)$/i", $value)) {
                 //     showmessage('activity_imgurl_error');
                 // }
                 if (empty($value) && $key != 'residedist' && $key != 'residecommunity') {
                     return $this->_makeErrorInfo($res, 'activity_exile_field');
                 }
                 $ufielddata['userfield'][$key] = $value;
             }
         }
         if (!empty($activity['ufield']['extfield'])) {
             foreach ($activity['ufield']['extfield'] as $fieldid) {
                 $value = cutstr(dhtmlspecialchars(trim($_GET['' . $fieldid])), 50, '.');
                 $ufielddata['extfield'][$fieldid] = $value;
             }
         }
         $ufielddata = !empty($ufielddata) ? serialize($ufielddata) : '';
     }
     if ($_G['setting']['activitycredit'] && $activity['credit'] && empty($applyinfo['verified'])) {
         checklowerlimit(array('extcredits' . $_G['setting']['activitycredit'] => '-' . $activity['credit']));
         updatemembercount($uid, array($_G['setting']['activitycredit'] => '-' . $activity['credit']), true, 'ACC', $tid);
     }
     $data = array('tid' => $tid, 'username' => $_G['username'], 'uid' => $uid, 'message' => $message, 'verified' => $verified, 'dateline' => $_G['timestamp'], 'payment' => $payment, 'ufielddata' => $ufielddata);
     if ($applyinfo && $applyinfo['verified'] == DzForumActivityApply::STATUS_VERIFIED_IMPROVE) {
         DzForumActivityApply::updateApplyById($data, $applyinfo['applyid']);
     } else {
         DzForumActivityApply::insertApply($data);
     }
     DzForumActivity::updateApplyNumberByTid($tid);
     if ($thread['authorid'] != $uid) {
         notification_add($thread['authorid'], 'activity', 'activity_notice', array('tid' => $tid, 'subject' => $thread['subject']));
         $space = array();
         space_merge($space, 'field_home');
         if (!empty($space['privacy']['feed']['newreply'])) {
             $feed['icon'] = 'activity';
             $feed['title_template'] = 'feed_reply_activity_title';
             $feed['title_data'] = array('subject' => "<a href=\"forum.php?mod=viewthread&tid={$tid}\">{$thread['subject']}</a>", 'hash_data' => "tid{$tid}");
             $feed['id'] = $tid;
             $feed['idtype'] = 'tid';
             postfeed($feed);
         }
     }
     $res = $this->_makeErrorInfo($res, 'activity_completion');
     $res['rs'] = 1;
     return $res;
 }