<?php

class Alisms
{
    private $bucket = null;

    private $conf = array(
        'host' => 'dysmsapi.aliyuncs.com',
        'format' => 'JSON',
        'version' => '2017-05-25',
        'signatureVersion' => '1.0',
        'signatureMethod' => 'HMAC-SHA1',
        'accessKeyId' => null,
        'accessKeySecret' => null,
        'signName' => null,
        'templateCode' => null,
    );

    public function __construct($conf)
    {
        $this->setConf($conf);
    }

    public function setConf($conf)
    {
        $this->conf = array_merge($this->conf, $conf);
        return true;
    }

    /**
     * 发送验证码
     *
     * @example shell curl -d 'Action=SingleSendSms
     &SignName=阿里云短信服务
     &TemplateCode=SMS_1595010
     &RecNum=13011112222
     &ParamString={"no":"123456"}
     &<公共请求参数>' 'https://sms.aliyuncs.com/'
     * @return boolean
     */
    public function singleSendSms($mobile, $params, $template = null, $sign = null)
    {
        $data = [
            'Action' => 'SendSms',
            'SignName' => empty($sign) ? $this->conf['signName'] : $sign,
            'TemplateCode' => empty($template) ? $this->conf['templateCode'] : $template,
            'PhoneNumbers' => is_array($mobile) ? implode(',', $mobile) : $mobile,
            'TemplateParam' => json_encode($params),
        ];
        if (empty($data['SignName']) || empty($data['TemplateCode'])) {
            return false;
        }
        $tmp = $this->mergePublicParams($data);
        $tmp['Signature'] = $this->sign('GET', $tmp);
        $url = 'https://'.$this->conf['host'].'/?' . http_build_query ( $tmp );
        $ch = curl_init ();
        curl_setopt ( $ch, CURLOPT_URL, $url );
        curl_setopt ( $ch, CURLOPT_SSL_VERIFYPEER, FALSE );
        curl_setopt ( $ch, CURLOPT_SSL_VERIFYHOST, FALSE );
        curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
        curl_setopt ( $ch, CURLOPT_TIMEOUT, 10 );
        $result = curl_exec ( $ch );
        curl_close ( $ch );
        $result = json_decode ( $result, true );
        if ($result['Message'] == 'OK') {
            return ['code'=>0,'message'=>'发送成功'];
        }else{
            return ['code'=>1,'message'=>$result['Message']];
        }
    }
    
    /**
     * 合并“公共请求参数”
     *
     * @link https://help.aliyun.com/document_detail/44362.html
     */
    private function mergePublicParams($data)
    {
        $default = [
            'Format' => $this->conf['format'],
            'Version' => $this->conf['version'],
            'SignatureVersion' => $this->conf['signatureVersion'],
            'SignatureMethod' => $this->conf['signatureMethod'],
            'AccessKeyId' => $this->conf['accessKeyId'],
            'Timestamp' => gmDate("Y-m-d\TH:i:s\Z"),
            'SignatureNonce' => uniqid('', true),
        ];
        return array_merge($default,$data);
    }

    /**
     * 签名
     *
     * @link https://help.aliyun.com/document_detail/44363.html
     */
    private function sign($httpMethod, $data)
    {
        ksort($data);
        $q = http_build_query($data);
        return base64_encode(hash_hmac('sha1', $httpMethod . '&%2F&' . rawurlencode($q), $this->conf['accessKeySecret'] . '&', true));
    }
}
?>