<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 流年 <liu21st@gmail.com>
// +----------------------------------------------------------------------
use think\facade\Env;
use app\common\model\Order;
use think\db;

// 应用公共文件

if (!function_exists('get_middle_str')) {
    /**
     * 获取指定字符串中间内容
     * @param string $str 原字符串
     * @param string $leftStr 左侧
     * @param string $rightStr
     * @return bool|string
     */
    function get_middle_str($str, $leftStr, $rightStr)
    {
        $left  = strpos($str, $leftStr);
        $right = strpos($str, $rightStr, $left);
        if ($left < 0 || $right < $left) {
            return '';
        }
        return substr($str, $left + strlen($leftStr), $right - $left - strlen($leftStr));
    }
}


if (!function_exists('format_size')) {
    /**
     * 格式化文件大小单位
     * @param $size
     * @param string $delimiter
     * @return string
     */
    function format_size($size, $delimiter = '')
    {
        $units = array('B', 'KB', 'MB', 'GB', 'TB', 'PB');
        for ($i = 0; $size >= 1024 && $i < 5; $i++) {
            $size /= 1024;
        }
        return round($size, 2) . $delimiter . $units[$i];
    }
}

if (!function_exists('thumbnail_img')) {
    /**
     * 生成缩略图
     * @param string $status 上传后图片信息
     * @param string $width 宽
     * @param string $heigh 高
     */
    function thumbnail_img($status, $width, $heigh, $folder_name = '')
    {
        $img = Env::get('root_path') . 'public/uploads/attachment/' . $status->getSaveName();
        $image = \think\Image::open($img);
        $slt = substr($img, 0, strlen($img) - 4);
        $image->thumb($width, $heigh, \think\Image::THUMB_CENTER)->save($slt . '_' . $width . '_' . $heigh . '.' . $status->getExtension());
        $img_url = $status->getSaveName();
        $img_slt = '/uploads/' . $folder_name . '/' . substr($img_url, 0, strlen($img_url) - 4) . '_' . $width . '_' . $heigh . '.' . $status->getExtension();
        return $img_slt;
    }
}

if (!function_exists('get_order_sn')) {
    /**
     * 获取得到新订单编号
     */
    function get_order_sn()
    {
        mt_srand((float) microtime() * 1000000);
        $order_sn = 'O' . date('Ymd') . str_pad(mt_rand(1, 99999), 5, '0', STR_PAD_LEFT);
        $where = 'order_no="' . $order_sn . '"';
        //开始编辑区域
        $_OrderModel = new Order();
        $count = $_OrderModel->where($where)->count();
        //结束编辑区域
        if ($count == 0) {
            /* 否则就使用这个订单号 */
            return $order_sn;
        }
        return get_order_sn();
    }
}


/**
 * Desc: 用时间生成订单编号
 * @param $table
 * @param $field
 * @param string $prefix
 * @param int $rand_suffix_length
 * @param array $pool
 */
function createSn($table, $field, $prefix = '', $rand_suffix_length = 4, $pool = [])
{
    $suffix = '';
    for ($i = 0; $i < $rand_suffix_length; $i++) {
        if (empty($pool)) {
            $suffix .= rand(0, 9);
        } else {
            $suffix .= $pool[array_rand($pool)];
        }
    }
    $sn = $prefix . date('YmdHis') . $suffix;
    if (Db::name($table)->where($field, $sn)->find()) {
        return createSn($table, $field, $prefix, $rand_suffix_length, $pool);
    }
    return $sn;
}

/**
 * 生成会员码
 * @return 会员码
 */
function create_user_sn($prefix = '', $length = 8)
{
    $rand_str = '';
    for ($i = 0; $i < $length; $i++) {
        $rand_str .= mt_rand(0, 9);
    }
    $sn = $prefix . $rand_str;
    if (Db::name('user')->where(['sn' => $sn])->find()) {
        return create_user_sn($prefix, $length);
    }
    return $sn;
}

//生成用户邀请码
function generate_invite_code()
{

    $letter_all = range('A', 'Z');
    shuffle($letter_all);
    //排除I、O字母
    $letter_array = array_diff($letter_all, ['I', 'O', 'D']);
    //排除1、0
    $num_array = range('2', '9');
    shuffle($num_array);

    $pattern = array_merge($num_array, $letter_array, $num_array);
    shuffle($pattern);
    $pattern = array_values($pattern);

    $code = '';
    for ($i = 0; $i < 6; $i++) {
        $code .= $pattern[mt_rand(0, count($pattern) - 1)];
    }

    $code = strtoupper($code);
    $check = Db::name('user')->where('distribution_code', $code)->find();
    if ($check) {
        return generate_invite_code();
    }
    return $code;
}