<?php

defined('_JEXEC') or die('Restricted access');

jimport('joomla.application.component.model');
jimport('joomla.error.log');

class OpenaireModelInvenio extends JModel {
  private $invenioUrl;

  public function __construct($configuration) {
    parent::__construct($configuration);
    $db =& JFactory::getDBO();
    $db -> setQuery('SELECT `value` FROM `#__openaire` WHERE `key` = \'invenioUrl\'');
    $this->invenioUrl = $db->loadResult();
  }

  public function createRedirectUrl($referer) {
    $referer = ($referer != null)?$referer:$this->invenioUrl.'/deposit?style=portal&ln=en';

    $user = array(
      "email" => JFactory::getUser()->email, 
      "fullname" => JFactory::getUser()->name,
      "nickname" => JFactory::getUser()->username,
      "id" => JFactory::getUser()->id,
      "__timeout__" => time() + 3600, 
      "__userip__" => $_SERVER['REMOTE_ADDR']);

    $assertion = json_encode($user);
    $digest = hash_hmac('sha1', $assertion, 'password');
    $params = 
      'assertion='.urlencode($assertion).
      '&robot=OpenAIRE_Portal'.
      '&login_method=OpenAIRE'.
      '&digest='.$digest.
      '&referer='.$referer;

    $invenioUrl = $this->invenioUrl.'/youraccount/robotlogin?'.$params;

    JLog :: getInstance() -> addEntry(array('level' => 'info', 'comment' => 'redirect url: '.$invenioUrl));

    return $invenioUrl;
  }
}
?>