<?php
/**
 * Common.php UTF-8
 * 公共方法
 *
 * @date    : 2018/9/13 18:18
 *
 * @license 这不是一个自由软件，未经授权不许任何使用和传播。
 * @author  : wuyonghong <wyh@huosdk.com>
 * @version : HuoMp 1.0
 */

namespace huoMpMsg\controller;

use huo\controller\common\Base;
use huolib\constant\CacheConst;
use think\Cache;
use think\Log;

class Common extends Base {
    /**
     * 获取 access_token
     * https://developers.weixin.qq.com/miniprogram/dev/api/token.html
     *
     * @param string $appid      第三方用户唯一凭证
     * @param string $app_secret 第三方用户唯一凭证密钥，即appsecret
     * @param bool   $read_cache
     *
     * @return string|bool
     */
    public static function getAccessToken($appid, $app_secret, $read_cache = true) {
        $_cache_key = CacheConst::CACHE_ACCESS_TOKEN_PREFIX.$appid;
        $_data = Cache::get($_cache_key);
        if (!empty($_data)) {
            $_data = json_decode($_data, true);
            $_now_time = time();
            if (isset($_data['expires_time']) && $_now_time < $_data['expires_time']) {
                if ($read_cache) {
                    return $_data['access_token'];
                }
            }
        }
        $_url = 'https://api.weixin.qq.com/cgi-bin/token';
        $_param['grant_type'] = 'client_credential';
        $_param['appid'] = $appid;
        $_param['secret'] = $app_secret;
        $_rdata = self::curl($_url, http_build_query($_param));
        $_rdata = json_decode($_rdata, true);
        if (!isset($_rdata['access_token'])) {
            Log::write(
                "func=".__FUNCTION__."&class=".__CLASS__."&step=1&appid=$appid&app_secret=$app_secret".
                json_encode($_rdata), Log::ERROR
            );

            return false;
        }
        $_data['access_token'] = $_rdata['access_token'];
        $_data['expires_in'] = $_rdata['expires_in'];
        $_data['expires_time'] = time() + $_rdata['expires_in'];
        $_rs = Cache::set($_cache_key, json_encode($_data));
        if (false == $_rs) {
            return false;
        }

        return $_data['access_token'];
    }

    /**
     * 获取 jsapi_ticket
     * https://developers.weixin.qq.com/miniprogram/dev/api/token.html
     *
     * @param $access_token $appid      第三方用户唯一凭证
     *
     * @return string|bool
     */
    public static function getJsapiTicket($access_token) {
        $_cache_key = CacheConst::CACHE_JSAPI_TICKET_PREFIX.$access_token;
        $_data = Cache::get($_cache_key);
        if (!empty($_data)) {
            $_data = json_decode($_data, true);
            $_now_time = time();
            if (isset($_data['expires_time']) && $_now_time < $_data['expires_time']) {
                return $_data['ticket'];
            }
        }
        $_url = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket';
        $_param['type'] = 'jsapi';
        $_param['access_token'] = $access_token;
        $_rdata = self::curl($_url, http_build_query($_param));
        $_rdata = json_decode($_rdata, true);
        if (!isset($_rdata['ticket'])) {
            Log::write(
                "func=".__FUNCTION__."&class=".__CLASS__."&step=1&access_token=$access_token".
                json_encode($_rdata), Log::ERROR
            );

            return false;
        }
        $_data['ticket'] = $_rdata['ticket'];
        $_data['expires_in'] = $_rdata['expires_in'];
        $_data['expires_time'] = time() + $_rdata['expires_in'];
        $_rs = Cache::set($_cache_key, json_encode($_data));
        if (false == $_rs) {
            return false;
        }

        return $_data['ticket'];
    }

    /**
     * CURL请求
     *
     * @param string $url    请求的URL
     * @param string $params 请求的参数
     * @param string $is_get 是否是get请求
     * @param array  $header 头
     *
     * @return int|mixed
     */
    public static function curl($url, $params, $is_get = "GET", $header = []) {
        $_header = $header;
        $ch = curl_init();
        if ("GET" == $is_get) {
            if (!empty($params)) {
                $url = $url.'?'.$params;
            }
            curl_setopt($ch, CURLOPT_HEADER, 0); // 过滤HTTP头
        } else {
            curl_setopt($ch, CURLOPT_POST, 1);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
        }
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 3);//设置等待时间
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);//要求结果为字符串且输出到屏幕上
        /* https 请求 */
        if (strlen($url) > 5 && strtolower(substr($url, 0, 5)) == "https") {
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        }
        if (!empty($_header)) {
            array_push($_header, 'Content-Length: '.strlen($params));
            curl_setopt($ch, CURLOPT_HTTPHEADER, $_header);
        }
        $_rs = curl_exec($ch);
        if (false === $_rs) {
            $_rs = curl_errno($ch);
        }
        curl_close($ch);

        return $_rs;
    }

    /**
     * 判断是否json
     *
     * @param $string
     *
     * @return bool
     */
    public static function isJson($string) {
        json_decode($string);

        return (json_last_error() == JSON_ERROR_NONE);
    }
}