<?PHP
namespace App\DAO\Lib;
class mail
{

    protected $base_url = 'http://api.mysubmail.com/';

    protected $mail_configs;
    protected $signType = 'normal';

    function __construct($mail_config)
    {
        $this->mail_configs = $mail_config;
        if (!empty($mail_config['server'])) {
            $this->base_url = $mail_config['server'];
        }
    }

    protected function createSignature($request)
    {
        $r = "";
        switch ($this->signType) {
            case 'normal':
                $r = $this->mail_configs['appkey'];
                break;
            case 'md5':
                $r = $this->buildSignature($this->argSort($request));
                break;
            case 'sha1':
                $r = $this->buildSignature($this->argSort($request));
                break;
        }
        return $r;
    }

    protected function buildSignature($request)
    {
        $arg = "";
        $app = $this->mail_configs['appid'];
        $appkey = $this->mail_configs['appkey'];
        while (list ($key, $val) = each($request)) {
            if (strpos($key, "attachments") === false) {
                $arg .= $key . "=" . $val . "&";
            }
        }
        $arg = substr($arg, 0, count($arg) - 2);
        if (get_magic_quotes_gpc()) {
            $arg = stripslashes($arg);
        }
        if ($this->signType == 'sha1') {
            $r = sha1($app . $appkey . $arg . $app . $appkey);
        } else {
            $r = md5($app . $appkey . $arg . $app . $appkey);
        }
        return $r;
    }

    protected function argSort($request)
    {
        ksort($request);
        reset($request);
        return $request;
    }

    public function getTimestamp()
    {
        $api = $this->base_url . 'service/timestamp.json';
        $ch = curl_init($api);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
        $output = curl_exec($ch);
        $timestamp = json_decode($output, true);

        return $timestamp['timestamp'];
    }

    protected function APIHttpRequestCURL($api, $post_data, $method = 'post')
    {
        if ($method != 'get') {
            $ch = curl_init();
            curl_setopt_array($ch, array(
                CURLOPT_URL => $api,
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_POSTFIELDS => http_build_query($post_data),
                CURLOPT_CUSTOMREQUEST => strtoupper($method),
                CURLOPT_HTTPHEADER => array("Content-Type: application/x-www-form-urlencoded")
            ));
        } else {
            $url = $api . '?' . http_build_query($post_data);
            $ch = curl_init($url);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
        }
        $output = curl_exec($ch);
        curl_close($ch);
        $output = trim($output, "\xEF\xBB\xBF");
        return json_decode($output, true);
    }


    public function send($request)
    {
        $api = $this->base_url . 'mail/send.json';
        $request['appid'] = $this->mail_configs['appid'];
        $request['timestamp'] = $this->getTimestamp();
        if (empty($this->mail_configs['sign_type'])
            && $this->mail_configs['sign_type'] == ""
            && $this->mail_configs['sign_type'] != "normal"
            && $this->mail_configs['sign_type'] != "md5"
            && $this->mail_configs['sign_type'] != "sha1"
        ) {
            $this->signType = 'normal';
        } else {
            $this->signType = $this->mail_configs['sign_type'];
            $request['sign_type'] = $this->mail_configs['sign_type'];
        }
        $request['signature'] = $this->createSignature($request);
        $send = $this->APIHttpRequestCURL($api, $request);

        return $send;
    }

    public function xsend($request)
    {
        $api = $this->base_url . 'mail/xsend.json';
        $request['appid'] = $this->mail_configs['appid'];
        $request['timestamp'] = $this->getTimestamp();
        if (empty($this->mail_configs['sign_type'])
            && $this->mail_configs['sign_type'] == ""
            && $this->mail_configs['sign_type'] != "normal"
            && $this->mail_configs['sign_type'] != "md5"
            && $this->mail_configs['sign_type'] != "sha1"
        ) {
            $this->signType = 'normal';
        } else {
            $this->signType = $this->mail_configs['sign_type'];
            $request['sign_type'] = $this->mail_configs['sign_type'];
        }
        $request['signature'] = $this->createSignature($request);
        $xsend = $this->APIHttpRequestCURL($api, $request);
        return $xsend;
    }

    public function subscribe($request)
    {
        $api = $this->base_url . 'addressbook/mail/subscribe.json';
        $request['appid'] = $this->mail_configs['appid'];
        $request['timestamp'] = $this->getTimestamp();
        if (empty($this->mail_configs['sign_type'])
            && $this->mail_configs['sign_type'] == ""
            && $this->mail_configs['sign_type'] != "normal"
            && $this->mail_configs['sign_type'] != "md5"
            && $this->mail_configs['sign_type'] != "sha1"
        ) {
            $this->signType = 'normal';
        } else {
            $this->signType = $this->mail_configs['sign_type'];
            $request['sign_type'] = $this->mail_configs['sign_type'];
        }
        $request['signature'] = $this->createSignature($request);
        $subscribe = $this->APIHttpRequestCURL($api, $request);
        return $subscribe;
    }

    public function unsubscribe($request)
    {
        $api = $this->base_url . 'addressbook/mail/unsubscribe.json';
        $request['appid'] = $this->mail_configs['appid'];
        $request['timestamp'] = $this->getTimestamp();
        if (empty($this->mail_configs['sign_type'])
            && $this->mail_configs['sign_type'] == ""
            && $this->mail_configs['sign_type'] != "normal"
            && $this->mail_configs['sign_type'] != "md5"
            && $this->mail_configs['sign_type'] != "sha1"
        ) {
            $this->signType = 'normal';
        } else {
            $this->signType = $this->mail_configs['sign_type'];
            $request['sign_type'] = $this->mail_configs['sign_type'];
        }
        $request['signature'] = $this->createSignature($request);
        $unsubscribe = $this->APIHttpRequestCURL($api, $request);
        return $unsubscribe;
    }
}