<?php
namespace app\server;

use support\Log;

class BaiduApiService {
    /**
     * @file   baidu_transapi.php
     * @author mouyantao(mouyantao@baidu.com)
     * @date   2015/06/23 14:32:18
     * @brief
     **/
    const CURL_TIMEOUT = 10;
    const URL = "http://api.fanyi.baidu.com/api/trans/vip/translate";
    const APP_ID = "20250324002313859"; //替换为您的APPID
    const SEC_KEY = "cyOyMUfVAmBZjI0CFCjL";//替换为您的密钥

    //翻译入口
    function translate($query, $from, $to) {
        $args = array('q' => $query, 'appid' => self::APP_ID, 'salt' => rand(10000, 99999), 'from' => $from, 'to' => $to,);
        $args['sign'] = $this->buildSign($query, self::APP_ID, $args['salt'], self::SEC_KEY);
        $ret = $this->call(self::URL, $args);

        $ret = json_decode($ret, true);
        return $ret['trans_result'][0]['dst'] ?? '';
    }

    //加密
    function buildSign($query, $appID, $salt, $secKey) {/*{{{*/
        $str = $appID . $query . $salt . $secKey;
        $ret = md5($str);

        return $ret;
    }/*}}}*/

    //发起网络请求
    function call($url, $args = null, $method = "post", $testflag = 0, $timeout = self::CURL_TIMEOUT, $headers = array()) {/*{{{*/
        $ret = false;
        $i = 0;
        while ($ret === false) {
            if ($i > 1) {
                break;
            }
            if ($i > 0) {
                sleep(1);
            }
            $ret = $this->callOnce($url, $args, $method, false, $timeout, $headers);
            $i++;
        }

        return $ret;
    }/*}}}*/
    function callOnce($url, $args = null, $method = "post", $withCookie = false, $timeout = self::CURL_TIMEOUT, $headers = array()) {/*{{{*/
        $ch = curl_init();
        if ($method == "post") {
            $data = $this->convert($args);
            curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
            curl_setopt($ch, CURLOPT_POST, 1);
        }
        else {
            $data = $this->convert($args);
            if ($data) {
                if (stripos($url, "?") > 0) {
                    $url .= "&$data";
                }
                else {
                    $url .= "?$data";
                }
            }
        }
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        if (!empty($headers)) {
            curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
        }
        if ($withCookie) {
            curl_setopt($ch, CURLOPT_COOKIEJAR, $_COOKIE);
        }
        $r = curl_exec($ch);
        curl_close($ch);

        return $r;
    }

    function convert(&$args) {/*{{{*/
        $data = '';
        if (is_array($args)) {
            foreach ($args as $key => $val) {
                if (is_array($val)) {
                    foreach ($val as $k => $v) {
                        $data .= $key . '[' . $k . ']=' . rawurlencode($v) . '&';
                    }
                }
                else {
                    $data .= "$key=" . rawurlencode($val) . "&";
                }
            }

            return trim($data, "&");
        }

        return $args;
    }/*}}}*/
}