<?php

namespace app\common\dm;

class Dm
{
    private $host = 'localhost:5236'; // IP 地址
    private $port = '5236'; // 端口号
    private $dbname = 'CXK'; // 数据库名
    private $username = 'SYSDBA'; // 用户名
    private $password = 'SYSDBA'; // 密码
    private $charset = 'GBK'; // 字符集

    public $conn;

    public function __construct()
    {
        $database = config('database');
        $dm = $database['connections']['dm'];
        $this->conn = dm_connect($dm['hostname'].':'.$dm['hostport'], $dm['username'], $dm['password']);
        if (!$this->conn) {
            die('连接数据库失败！');
        }
    }

    public function insert($table, $data)
    {
        #$fields = implode(',', array_keys($data));
        $values = "'" . implode("','", array_values($data)) . "'";

        $sql = 'INSERT INTO '.$table.' VALUES ('.$values.')';

        $res = dm_exec($this->conn, $sql);

        dm_free_result($res);

        return $res;
    }

    // 更新数据
    public function update($table, $data, $where)
    {
        $set = array();
        foreach ($data as $key => $value) {
            $set[] = $key . '=' . "'{$value}'";
        }

        $sql = 'UPDATE '.$table." SET " . implode(",", $set) . ' WHERE '.$where;

        $res = dm_exec($this->conn, $sql);

        dm_free_result($res);

        return $res;
    }

    // 删除数据
    public function delete($table, $where)
    {
        $sql = 'DELETE FROM '.$table.' WHERE '.$where;

        $result = dm_exec($this->conn, $sql);

        dm_free_result($result);

        return $result;
    }

    // 清空表
    public function truncate($table)
    {

        $sql = 'truncate table '.$table;

        $result = dm_exec($this->conn, $sql);

        dm_free_result($result);

        return $result;
    }

    // 查询数据
    public function select($table, $where = null, $fields = '*', $order = null, $limit = null)
    {
        $sql = 'SELECT '.$fields.' FROM '.$table;
        if ($where != null) {
            $sql .= ' WHERE '.$where;
        }
        if ($order != null) {
            $sql .= ' ORDER BY '.$order;
        }
        if ($limit != null) {
            $sql .= ' LIMIT '.$limit;
        }

        $result = dm_exec($this->conn, $sql);
        $data = array();

        while ($row = dm_fetch_array($result)) {
            $data[] = $row;
        }

        dm_free_result($result);

        return $data;
    }

}