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    // topic search
    $sql = "SELECT ".
            "c.c_commu_id AS cid,".
            "c.name AS cname,".
            "c.uid_admin AS cadmin,".
            "c.uid_sub_admin AS csubadmin,".
            "c.public_flag AS cflag,".
            "t.c_commu_topic_id AS tid,".
            "t.name AS tname,".
            "tc.body AS tcbody,".
            "tc.uid AS tcuid,".
            "MAX(tc.number) AS comment_count,".
            "MAX(tc.r_datetime) AS max_r_datetime".
            " FROM (". $db->prefix($mydirname.'_c_commu'). " c".
            " INNER JOIN ". $db->prefix($mydirname.'_c_commu_topic_comment'). " tc".
            " USING(c_commu_id))".
            " INNER JOIN ". $db->prefix($mydirname.'_c_commu_topic'). " t".
            " USING(c_commu_topic_id)".
            " GROUP BY tid".
            " ORDER BY max_r_datetime DESC";

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function b_xsns_recent_topic_show($options)
{
    global $xoopsUser, $xoopsUserIsAdmin;
    
    require_once dirname(dirname(__FILE__)).'/include/common_functions.php';
    
    $db =& Database::getInstance();
    $myts =& MyTextSanitizer::getInstance();
    
    $mydirname = empty($options[0]) ? 'xsns' : $options[0];
    $item_limit = empty($options[1]) ? 5 : intval($options[1]);
    
    if( preg_match( '/[^0-9a-zA-Z_-]/' , $mydirname ) ) die( 'Invalid dirname' ) ;
    
    $constpref = '_MB_'.strtoupper($mydirname);
    
    $block = array();
    $perm_arr = array();
    
    $own_uid = is_object($xoopsUser) ? $xoopsUser->getVar('uid') : -1;
    
    // naao from
    //各トピの最新コメントIDを取得
    $sql = "SELECT c_commu_topic_id AS tid, MAX(c_commu_topic_comment_id) AS com_id FROM ". $db->prefix($mydirname.'_c_commu_topic_comment')." GROUP BY tid;";
 
    $result = $db->query($sql);
    if(!$result || $db->getRowsNum($result) < 1){
        return array();
    }
    
    while ( $dbdat = $db->fetchArray($result)){
        $com_num[] = intval($dbdat['com_id']);
    }
 
      $whr_num = "tc.c_commu_topic_comment_id IN (" .implode( "," , $com_num ). ") ";
 
    // topic search
    $sql = "SELECT ".
            "c.c_commu_id AS cid,".
            "c.name AS cname,".
            "c.uid_admin AS cadmin,".
            "c.uid_sub_admin AS csubadmin,".
            "c.public_flag AS cflag,".
            "t.c_commu_topic_id AS tid,".
            "t.name AS tname,".
            "tc.body AS tcbody,".
            "tc.uid AS tcuid,".
            "tc.number AS comment_count,".
            "tc.r_datetime AS r_datetime,".
            "tc.c_commu_topic_comment_id ".
            " FROM (". $db->prefix($mydirname.'_c_commu'). " c".
            " INNER JOIN ". $db->prefix($mydirname.'_c_commu_topic_comment'). " tc".
            " USING(c_commu_id))".
            " INNER JOIN ". $db->prefix($mydirname.'_c_commu_topic'). " t".
            " USING(c_commu_topic_id)".
            " WHERE ".$whr_num.
            " ORDER BY r_datetime DESC";
    // naao to
    
    $rs = $db->query($sql);
    if(!$rs || $db->getRowsNum($rs) < 1){
        return array();
    }
    
    $today = date('Y-m-d');
    $item_count = 0;
    require_once dirname(dirname(__FILE__)).'/userlib/utils.php';
    
    while($row = $db->fetchArray($rs)) {
        
        if($item_limit <= $item_count){
            break;
        }
        
        // check community permission
        if($row['cflag']==3 && !$xoopsUserIsAdmin && $row['cadmin']!=$own_uid && $row['csubadmin']!=$own_uid){
            if($own_uid < 0){
                continue;
            }
            $cid = intval($row['cid']);
            if(!isset($perm_arr[$cid])){
                $perm_arr[$cid] = xsns_is_community_member($mydirname, $cid, $own_uid);
            }
            if(!$perm_arr[$cid]){
                continue;
            }
        }
        
        //$date_arr = explode(' ', XsnsUtils::getUserDatetime($row['max_r_datetime']), 2);
        $date_arr = explode(' ', XsnsUtils::getUserDatetime($row['r_datetime']), 2);    //naao
        if(!is_array($date_arr)){
            continue;
        }
        if($today==$date_arr[0]){
            $r_time_arr = explode(':', $date_arr[1], 3);
            if(!is_array($r_time_arr)){
                continue;
            }
            $r_time = $r_time_arr[0].':'.$r_time_arr[1];
        }
        else{
            $r_time_arr = explode('-', $date_arr[0], 3);
            if(!is_array($r_time_arr)){
                continue;
            }
            $r_time = $r_time_arr[1]. constant($constpref.'_MONTH'). $r_time_arr[2]. constant($constpref.'_DAY');
        }
        
            $comment_index = intval(intval($row['comment_count'])/20)*20;    //naao
            
        $block['topic_list'][] = array(
            'link' => XOOPS_URL.'/modules/'.$mydirname.'/?p=topic&tid='.intval($row['tid']).'&s='.$comment_index.'#'.intval($row['comment_count']),    //naao
            'title' => $myts->htmlSpecialChars($row['tname']),
            'body' => $myts->htmlSpecialChars($row['tcbody']),
            'comment_count' => intval($row['comment_count']),
            'datetime' => $r_time,
        //    'time' => XsnsUtils::getUserTimestamp($row['max_r_datetime']),    //naao
            'time' => XsnsUtils::getUserTimestamp($row['r_datetime']),    //naao
            'uid' => intval($row['tcuid']),
            'community' => array(
                'link' => XOOPS_URL.'/modules/'.$mydirname.'/?cid='.intval($row['cid']),
                'title' => $myts->htmlSpecialChars($row['cname']),
            ),
        );
        
        $item_count++;
    }
    
    if(empty($options['disable_renderer'])){
        require_once XOOPS_ROOT_PATH.'/class/template.php' ;
        $tpl =& new XoopsTpl();
        $tpl->assign('block', $block);
        $ret['content'] = $tpl->fetch('db:'.$mydirname.'_block_recent_topic.html');
        return $ret;
    }
    else{
        return $block;
    }
}