<?php

class ucclient_db
{
    public $querynum = 0;
    public $link;
    public $histories;
    public $dbhost;
    public $dbuser;
    public $dbpw;
    public $dbcharset;
    public $pconnect;
    public $tablepre;
    public $time;
    public $goneaway = 5;
    public function connect($dbhost, $dbuser, $dbpw, $dbname = '', $dbcharset = '', $pconnect = 0, $tablepre = '', $time = 0)
    {
        $this->dbhost = $dbhost;
        $this->dbuser = $dbuser;
        $this->dbpw = $dbpw;
        $this->dbname = $dbname;
        $this->dbcharset = $dbcharset;
        $this->pconnect = $pconnect;
        $this->tablepre = $tablepre;
        $this->time = $time;
        if ($pconnect) {
            if (!($this->link = mysql_pconnect($dbhost, $dbuser, $dbpw))) {
                $this->halt('Can not connect to MySQL server');
            }
        } else {
            if (!($this->link = mysql_connect($dbhost, $dbuser, $dbpw))) {
                $this->halt('Can not connect to MySQL server');
            }
        }
        if ('4.1' < $this->version()) {
            if ($dbcharset) {
                mysql_query('SET character_set_connection=' . $dbcharset . ', character_set_results=' . $dbcharset . ', character_set_client=binary', $this->link);
            }
            if ('5.0.1' < $this->version()) {
                mysql_query('SET sql_mode=\'\'', $this->link);
            }
        }
        if ($dbname) {
            mysql_select_db($dbname, $this->link);
        }
    }
    public function fetch_array($query, $result_type = MYSQL_ASSOC)
    {
        return mysql_fetch_array($query, $result_type);
    }
    public function result_first($sql)
    {
        $query = $this->query($sql);
        return $this->result($query, 0);
    }
    public function fetch_first($sql)
    {
        $query = $this->query($sql);
        return $this->fetch_array($query);
    }
    public function fetch_all($sql, $id = '')
    {
        $arr = array();
        $query = $this->query($sql);
        while ($data = $this->fetch_array($query)) {
            $id ? $arr[$data[$id]] = $data : ($arr[] = $data);
        }
        return $arr;
    }
    public function cache_gc()
    {
        $this->query('DELETE FROM ' . $this->tablepre . 'sqlcaches WHERE expiry<' . $this->time);
    }
    public function query($sql, $type = '', $cachetime = false)
    {
        $func = $type == 'UNBUFFERED' && @function_exists('mysql_unbuffered_query') ? 'mysql_unbuffered_query' : 'mysql_query';
        if (!($query = $func($sql, $this->link) && $type != 'SILENT')) {
            $this->halt('MySQL Query Error', $sql);
        }
        $this->querynum++;
        $this->histories[] = $sql;
        return $query;
    }
    public function affected_rows()
    {
        return mysql_affected_rows($this->link);
    }
    public function error()
    {
        return $this->link ? mysql_error($this->link) : mysql_error();
    }
    public function errno()
    {
        return intval($this->link ? mysql_errno($this->link) : mysql_errno());
    }
    public function result($query, $row)
    {
        $query = @mysql_result($query, $row);
        return $query;
    }
    public function num_rows($query)
    {
        $query = mysql_num_rows($query);
        return $query;
    }
    public function num_fields($query)
    {
        return mysql_num_fields($query);
    }
    public function free_result($query)
    {
        return mysql_free_result($query);
    }
    public function insert_id()
    {
        return 0 <= ($id = mysql_insert_id($this->link) ? $id : $this->result($this->query('SELECT last_insert_id()'), 0));
    }
    public function fetch_row($query)
    {
        $query = mysql_fetch_row($query);
        return $query;
    }
    public function fetch_fields($query)
    {
        return mysql_fetch_field($query);
    }
    public function version()
    {
        return mysql_get_server_info($this->link);
    }
    public function close()
    {
        return mysql_close($this->link);
    }
    public function halt($message = '', $sql = '')
    {
        $error = mysql_error();
        $errorno = mysql_errno();
        if ($errorno == 2006 && 0 < $this->goneaway--) {
            $this->connect($this->dbhost, $this->dbuser, $this->dbpw, $this->dbname, $this->dbcharset, $this->pconnect, $this->tablepre, $this->time);
            $this->query($sql);
        } else {
            $s = '';
            if ($message) {
                $s = '<b>UCenter info:</b> ' . $message . '<br />';
            }
            if ($sql) {
                $s .= '<b>SQL:</b>' . htmlspecialchars($sql) . '<br />';
            }
            $s .= '<b>Error:</b>' . $error . '<br />';
            $s .= '<b>Errno:</b>' . $errorno . '<br />';
            $s = str_replace(UC_DBTABLEPRE, '[Table]', $s);
            exit($s);
        }
    }
}