<?php namespace Lib;

class HTTPUnexpectedResponse extends \Exception {
    static $ecode = array(
        100 => 'Continue',
        101 => 'Switching Protocols',
        102 => 'Processing', // WebDAV; RFC 2518
        200 => 'OK',
        201 => 'Created',
        202 => 'Accepted',
        203 => 'Non-Authoritative Information', // since HTTP/1.1
        204 => 'No Content',
        205 => 'Reset Content',
        206 => 'Partial Content',
        207 => 'Multi-Status', // WebDAV; RFC 4918
        208 => 'Already Reported', // WebDAV; RFC 5842
        226 => 'IM Used', // RFC 3229
        300 => 'Multiple Choices',
        301 => 'Moved Permanently',
        302 => 'Found',
        303 => 'See Other', // since HTTP/1.1
        304 => 'Not Modified',
        305 => 'Use Proxy', // since HTTP/1.1
        306 => 'Switch Proxy',
        307 => 'Temporary Redirect', // since HTTP/1.1
        308 => 'Permanent Redirect', // approved as experimental RFC
        400 => 'Bad Request',
        401 => 'Unauthorized',
        402 => 'Payment Required',
        403 => 'Forbidden',
        404 => 'Not Found',
        405 => 'Method Not Allowed',
        406 => 'Not Acceptable',
        407 => 'Proxy Authentication Required',
        408 => 'Request Timeout',
        409 => 'Conflict',
        410 => 'Gone',
        411 => 'Length Required',
        412 => 'Precondition Failed',
        413 => 'Request Entity Too Large',
        414 => 'Request-URI Too Long',
        415 => 'Unsupported Media Type',
        416 => 'Requested Range Not Satisfiable',
        417 => 'Expectation Failed',
        418 => 'I\'m a teapot', // RFC 2324
        419 => 'Authentication Timeout', // not in RFC 2616
        420 => 'Enhance Your Calm', // Twitter
        420 => 'Method Failure', // Spring Framework
        422 => 'Unprocessable Entity', // WebDAV; RFC 4918
        423 => 'Locked', // WebDAV; RFC 4918
        424 => 'Failed Dependency', // WebDAV; RFC 4918
        424 => 'Method Failure', // WebDAV)
        425 => 'Unordered Collection', // Internet draft
        426 => 'Upgrade Required', // RFC 2817
        428 => 'Precondition Required', // RFC 6585
        429 => 'Too Many Requests', // RFC 6585
        431 => 'Request Header Fields Too Large', // RFC 6585
        444 => 'No Response', // Nginx
        449 => 'Retry With', // Microsoft
        450 => 'Blocked by Windows Parental Controls', // Microsoft
        451 => 'Redirect', // Microsoft
        451 => 'Unavailable For Legal Reasons', // Internet draft
        494 => 'Request Header Too Large', // Nginx
        495 => 'Cert Error', // Nginx
        496 => 'No Cert', // Nginx
        497 => 'HTTP to HTTPS', // Nginx
        499 => 'Client Closed Request', // Nginx
        500 => 'Internal Server Error',
        501 => 'Not Implemented',
        502 => 'Bad Gateway',
        503 => 'Service Unavailable',
        504 => 'Gateway Timeout',
        505 => 'HTTP Version Not Supported',
        506 => 'Variant Also Negotiates', // RFC 2295
        507 => 'Insufficient Storage', // WebDAV; RFC 4918
        508 => 'Loop Detected', // WebDAV; RFC 5842
        509 => 'Bandwidth Limit Exceeded', // Apache bw/limited extension
        510 => 'Not Extended', // RFC 2774
        511 => 'Network Authentication Required', // RFC 6585
        598 => 'Network read timeout error', // Unknown
        599 => 'Network connect timeout error', // Unknown
    );
}

class NotAuthorizedException extends \Exception{}

trait Curl {
    protected $url;
    protected $token;

    protected $user_agent = "Gogs PHP Api Client/0.0 (compatible; LINUX)";
    protected $timeout = 30;
    protected $max_redirects = 4;

    protected function method(&$req, $scope, $params, $post, $ret) {
        echo sprintf("%s: %s%s\n", $post ? "POST" : "GET", $this->url, $scope);
        $c = curl_init();

        if (!$c) {
            return false;
        }

        if ($post) {
            curl_setopt($c, CURLOPT_POST, 1);
            curl_setopt($c, CURLOPT_POSTFIELDS, $params);
        }

        curl_setopt($c, CURLOPT_USERAGENT, $this->user_agent);
        curl_setopt($c, CURLOPT_URL, sprintf("%s%s", $this->url, $scope));
        curl_setopt($c, CURLOPT_HTTPHEADER, array(
            sprintf("Authorization: token %s", $this->token)
        ));
        curl_setopt($c, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($c, CURLOPT_TIMEOUT, $this->timeout);
        curl_setopt($c, CURLOPT_MAXREDIRS, $this->max_redirects);
        curl_setopt($c, CURLOPT_FOLLOWLOCATION, true);

        $req = curl_exec($c);

        $status_code = curl_getinfo($c, CURLINFO_HTTP_CODE);

        curl_close($c);

        return $status_code;
    }

    protected function authorized($scope) {
        $ret = "";
        if ($this->method($ret, $scope, array(), false, false) == 401) {
            throw new NotAuthorizedException("Not authorized", 401);
        }
        return true;
    }

    private function post($scope = "", $params = array()) {
        $req = "";

        $code = $this->method($req, $scope, $params, true, true);

        switch ($code) {
        case 200:
            return $req;
        case 401:
            throw new NotAuthorizedException(HTTPUnexpectedResponse::$ecode[401], 401);
        default:
            throw new HTTPUnexpectedResponse(HTTPUnexpectedResponse::$ecode[$code], $code);
        }
    }

    private function get($scope = "", $params = array()) {
        $req = "";

        $code = $this->method($req, $scope, $params, false, true);

        switch ($code) {
        case 200:
            return $req;
        case 401:
            throw new NotAuthorizedException(HTTPUnexpectedResponse::$ecode[401], 401);
        default:
            throw new HTTPUnexpectedResponse(HTTPUnexpectedResponse::$ecode[$code], $code);

        }
    }

}