<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Org\Weixin;
class WeixinLogin{
    private $login_page_url = "https://open.weixin.qq.com/connect/oauth2/authorize?";//微信登录界面
    private $get_accessToken_url = "https://api.weixin.qq.com/sns/oauth2/access_token?";//获取token的url(此token仅用于授权登录)
    private $get_Token_url = "https://api.weixin.qq.com/cgi-bin/token?";//获取token的url
    private $get_user_info = "https://api.weixin.qq.com/sns/userinfo?";//获取用户信息的url
    private $app_id;//appid
    private $app_key;//AppSecret
    //参数
    public function __construct($config) {
        $this->app_id=$config[app_id];
        $this->app_key=$config[app_key];
        $this->redirect_url=$config[redirect_url];
    }
    //第一步：发起用户同意授权页
    public function send_accept_url($scope,$redirect_uri){//scope方式分别有[snsapi_base|snsapi_userinfo],$redirect_uri为回调地址
        $state = md5(rand(1,1000));
        $query =array(
            'appid' => $this->app_id,
            'redirect_uri' =>$redirect_uri,
            'response_type' => 'code',
            'scope' => $scope,
            'state' => $state,
        );
        $url= $this->login_page_url.http_build_query($query).'#wechat_redirect';
        header("Location:$url");
    }
    //第二步 回调地址，接受微信官方跳转过来的url参数，通过获取的code再去换access_token
    public function code_get_token($get){
        $code = $get['code'];
        $state = $get['state'];
        $query =array(
            'grant_type' => 'authorization_code',
            'code'       => $code,
            'secret' => $this->app_key,
            'appid' => $this->app_id,
        );
        $url_request = $this->get_accessToken_url.http_build_query($query);
        //抓取url data并转成json
        $data=  file_get_contents($url_request);
        return json_decode($data);        
    }
    //第三步 
    public function get_userinfo($get){
        $array = array(
            'access_token' => $get->access_token,
            'openid'       => $get->openid,
        );   
        $url_request = $this->get_user_info.http_build_query($array);
        //抓取url data并转成json
        $data=  file_get_contents($url_request);
        return json_decode($data);
    }
    //curl方式 提交数据
    public function curl_post($url,$vars,$second=120,$aHeader=array()){
        $vars=json_encode($vars);
        $ch = curl_init();
        //超时时间  
        curl_setopt($ch,CURLOPT_TIMEOUT,$second);  
        curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1);  
        //这里设置代理，如果有的话  
        curl_setopt($ch,CURLOPT_URL,$url);  
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);  
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);  
        if( count($aHeader) >= 1 ){  
            curl_setopt($ch, CURLOPT_HTTPHEADER, $aHeader);  
        }  
        curl_setopt($ch,CURLOPT_POST, 1);  
        curl_setopt($ch,CURLOPT_POSTFIELDS,$vars);
        $data = curl_exec($ch);  
        return $data;  
        if($data){  
            curl_close($ch);  
        }else {  
            $error = curl_errno($ch);  
            curl_close($ch);  
            return $error;  
        }  
    }  
    
    //获取 access token
    public function get_access_token(){
        $weixin_access_token=vars("weixin_access_token");
        $weixin_access_token_expires_in=vars("weixin_access_token_expires_in");
        if($weixin_access_token&&$weixin_access_token_expires_in>time()){
            return $weixin_access_token;
        }else{
            $query =array(
                'grant_type' => 'client_credential',
                'appid'       => $this->app_id,
                'secret' => $this->app_key,
            );
            $url_request = $this->get_Token_url.http_build_query($query);
            //抓取url data并转成json
            $data=  file_get_contents($url_request);      
            $data=json_decode($data);
            vars("weixin_access_token",$data->access_token);
            vars("weixin_access_token_expires_in",time()+1800);
            return $data->access_token; 
        } 
    }
    //获取关注的粉丝数
    public function fans_count(){
        $query =array(
            'access_token' => $this->get_access_token(),
        );        
        $url_request = "https://api.weixin.qq.com/datacube/getusercumulate?".http_build_query($query);
        $begin_date=$month_lastday=date('Y-m-d', strtotime(date('Y-m-d')." -1 day"));
        $end_date=date('Y-m-d', strtotime(date('Y-m-d')." -1 day"));
        $postdata=array("begin_date"=>$begin_date,"end_date"=>$end_date);
        $data=$this->curl_post($url_request,$postdata);
        $data=  json_decode($data);
        return $data->list[0]->cumulate_user;
    }
    //获取新关注的粉丝数
    public function newfans_count(){
        $query =array(
            'access_token' => $this->get_access_token(),
        );        
        $url_request = "https://api.weixin.qq.com/datacube/getusersummary?".http_build_query($query);
        $begin_date=$month_lastday=date('Y-m-d', strtotime(date('Y-m-d')." -2 day"));
        $end_date=date('Y-m-d', strtotime(date('Y-m-d')." -1 day"));
        $postdata=array("begin_date"=>$begin_date,"end_date"=>$end_date);
        $data=$this->curl_post($url_request,$postdata);
        $data=  json_decode($data);
        return $data->list[1]->new_user;
    }    
    //获取粉丝的详细信息
    public function get_fans_detail(){
        $query =array(
            'access_token' => $this->get_access_token(),
        );
        $url_request = "https://api.weixin.qq.com/datacube/getusersummary?".http_build_query($query);
        $begin_date=$month_lastday=date('Y-m-d', strtotime(date('Y-m-d')." -2 day"));
        $end_date=date('Y-m-d', strtotime(date('Y-m-d')." -1 day"));
        $postdata=array("begin_date"=>$begin_date,"end_date"=>$end_date);
        $data=$this->curl_post($url_request,$postdata);
        $data=  json_decode($data);
        return $data->list[1]->new_user;
    }      
}