<?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
     * @return void
     */
    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;
        }
    }


}