<?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 $database = 'STADIUM';

    public function __construct()
    {
        # 获取配置数据
        $database = config('database');
        $dm = $database['connections']['dm'];
        # 模式名称
        $this->database = $dm['database'];
        # 连接达梦数据库
        $this->conn = dm_connect($dm['hostname'].':'.$dm['hostport'], $dm['username'], $dm['password']);
        if (!$this->conn) {
            die('连接数据库失败！');
        }
    }

    /**
     * 拼接达梦查询数据表名
     * @param string $tableName        // 表名
     * @return string
     */
    protected function splitTableName($tableName) {
        if (strpos($tableName,$this->database) !== false) return  $tableName;
        return '"' . $this->database . '"."' . $tableName .'"';
    }

    /**
     * 创建数据
     * @param string $table    // 创建数据表名
     * @param array $data     // 创建数据
     * @return mixed
     */
    public function insert($table, $data)
    {
        $fields = '"' . implode('","', array_keys($data)) . '"';
        $values = "'" . implode("','", array_values($data)) . "'";
        $tableName = $this->splitTableName($table);
        $sql = 'INSERT INTO '.$tableName.'('.$fields.') VALUES ('.$values.')';

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

        dm_free_result($res);

        return $res;
    }

    /**
     * 更新数据
     * @param string $table    // 更新数据表名
     * @param array $data     // 更新数据
     * @param string $where    // 更新数据条件
     * @return mixed
     */
    public function update($table, $data, $where)
    {
        $set = array();
        foreach ($data as $key => $value) {
            $set[] = $key . '=' . "'{$value}'";
        }

        $tableName = $this->splitTableName($table);
        $sql = 'UPDATE '.$tableName." SET " . implode(",", $set) . ' WHERE '.$where;

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

        dm_free_result($res);

        return $res;
    }

    /**
     * 删除数据
     * @param string $table    // 删除数据表名
     * @param string $where    // 删除数据条件
     * @return mixed
     */
    public function delete($table, $where)
    {
        $tableName = $this->splitTableName($table);
        $sql = 'DELETE FROM '.$tableName.' WHERE '.$where;

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

        dm_free_result($result);

        return $result;
    }

    /**
     * 清空表
     * @param string $table    // 清空表名
     * @return mixed
     */
    public function truncate($table)
    {

        $tableName = $this->splitTableName($table);
        $sql = 'truncate table '.$tableName;

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

        dm_free_result($result);

        return $result;
    }

    /**
     * 查询多条数据
     * @param string $table        // 查询表名
     * @param string $where        // 查询条件
     * @param string $fields       // 查询字段
     * @param string $order        // 查询排序
     * @param string $limit        // 查询条数
     * @return array               // 返回数组
     */
    public function select($table, $where = null, $fields = '*', $order = null, $limit = null)
    {
        $tableName = $this->splitTableName($table);
        $sql = 'SELECT '.$fields.' FROM '.$tableName;
        if ($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;
    }

}