<?php


namespace app\mobile\logic;

//关于微信相关操作的工具类
use think\exception\ValidateException;
use think\facade\Validate;

class WechatLogic
{

    //获取微信网页授权URL
    //$param $callback string 微信回跳地址（接口已经默认url_encode处理，授权成功会有$_GET['code']值，可用于下个步骤）
    //$param $state string 重定向后会带上state参数（开发者可以填写a-zA-Z0-9的参数值，最多128字节）
    //$param $scope string 应用授权作用域（snsapi_base | snsapi_userinfo）
    public static function getOauthRedirect(string $callback = '', string $state = '', string $scope = 'snsapi_base'): string
    {

        $val = Validate::rule([
            'callback|微信回跳地址' => 'require|url',
            'state|携带参数' => 'require|length:1,255',
            'scope|应用授权作用域' => 'require|in:snsapi_base,snsapi_userinfo'
        ]);

        if (!$val->check(['callback' => $callback, 'state' => $state, 'scope' => $scope])) throw new ValidateException($val->getError());

        $oauth = &load_wechat('Oauth');

        $rs = $oauth->getOauthRedirect($callback, $state, $scope);

        halt('调用成功', $rs);

    }


}