<?php

namespace app\api\controller;

use app\api\model\Area;
use app\common\controller\Api;
use think\Request;


class Index extends Api
{
    protected $noNeedLogin = ['*'];

    private $bannerModel;

    public function __construct(Request $request = null)
    {
        $this->bannerModel = new \app\api\model\Banner();

        parent::__construct($request);
    }

    /**
     * 获取banner
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\ModelNotFoundException
     * @throws \think\exception\DbException
     */
    public function fetchBanner()
    {
        $module_type = input("module_type", "user");
        $banners = $this->bannerModel->fetchBanner($module_type, 5);
        $this->success($banners);
    }

    public function fetchArea()
    {
        $this->success(Area::fetchArea());
    }

    public function check()
    {
        $signature = $this->request->param('signature', "");
        $timestamp = $this->request->param('timestamp', "");
        $nonce = $this->request->param('nonce', "");
        $echostr = $this->request->param('echostr', "");
        if($this->checkSignature($signature,$timestamp,$nonce)){
            ob_clean();
            echo $echostr;die;//这里特别注意，如果不用die结束程序会token验证失败
        }else{
            echo false;
        }
    }

    private function checkSignature($signature,$timestamp,$nonce)
    {
        $token = "M1xMa324s5sa6geYsdhU342";//这里写你在微信公众平台里面填写的token
        $tmpArr = array($token,$timestamp, $nonce);
        sort($tmpArr, SORT_STRING);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );
        if($tmpStr == $signature){
            return true;
        }else{
            return false;
        }
    }


}