<?php
/**
 * 2007-2017 Decanet
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Academic Free License (AFL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/afl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@prestashop.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
 * versions in the future. If you wish to customize PrestaShop for your
 * needs please refer to http://www.decanet.fr for more information.
 *
 *  @author    Decanet SA <contact@decanet.fr>
 *  @copyright 2007-2017 Decanet SA
 *  @license   http://opensource.org/licenses/afl-3.0.php  Academic Free License (AFL 3.0)
 *  International Registered Trademark & Property of PrestaShop SA
*/

class DecanetApi
{
    public $LOGIN = false;
    public $PASS = false;
    public $ROOT = 'https://api.decanet.fr';

    public $timeDrift = 0;

    public function __construct($_login = false, $_pass = false, $_root = false)
    {
        if ($_login) {
            $this->LOGIN = $_login;
        }
        if ($_pass) {
            $this->PASS = $_pass;
        }
        if ($_root) {
            $this->ROOT = $_root;
        }

        // Compute time drift
        $srvTime = Tools::jsonDecode(Tools::file_get_contents($this->ROOT . '/auth/time'));
        if ($srvTime !== false) {
            $this->timeDrift = time() - (int)$srvTime;
        }
    }

    private function call($method, $url, $body = null)
    {
        $url = $this->ROOT . $url;
        if ($body) {
            $bodystring = '';
            foreach ($body as $key => $value) {
                $bodystring .= $key.'='.urlencode($value).'&';
            }
            $bodystring = rtrim($bodystring, '&');
        }
        
        // Compute signature
        $time = time() - $this->timeDrift;
        $toSign = $this->LOGIN.'+'.$this->PASS.'+'.$method.'+'.$time;
        $signature = '$1$' . sha1($toSign);

        // Call
        $curl = curl_init($url);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $method);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_HTTPHEADER, array(
            'X-Consumer:' . $this->LOGIN,
            'X-Signature:' . $signature,
            'X-Timestamp:' . $time,
        ));
        if ($body) {
            curl_setopt($curl, CURLOPT_POST, true);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $bodystring);
        }
        $result = curl_exec($curl);
        if ($result === false) {
            echo curl_error($curl);
            return null;
        }
        
        return Tools::jsonDecode($result);
    }

    public function get($url)
    {
        return $this->call("GET", $url);
    }
    public function put($url, $body)
    {
        return $this->call("PUT", $url, $body);
    }
    public function post($url, $body)
    {
        return $this->call("POST", $url, $body);
    }
    public function delete($url, $body = false)
    {
        return $this->call("DELETE", $url, $body);
    }
}