D-Net

<?php

defined('_JEXEC') or die('Access denied');

jimport('joomla.application.component.helper');

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

jimport('joomla.log.log');

// This model creates redirection URLs.

class OpenAireModelRedirect extends JModelItem {

	const LOG = 'openaire';

	private $invenioUrl;

	private $invenioPassword;

	private $validatorUrl;

	private $validatorPassword;

	// Construct a new OpenAireModelInvenio.

	// $configuration the configuration to use

	public function __construct($configuration) {

		parent::__construct($configuration);

		$parameters = JComponentHelper :: getParams('com_openaire');

		$this -> invenioUrl = $parameters -> get('invenioUrl');

		$this -> invenioPassword = $parameters -> get('invenioPassword');

		$this -> validatorUrl = $parameters -> get('validatorUrl');

		$this -> validatorPassword = $parameters -> get('validatorPassword');

	}

	// Create an Invenio redirect URL. Since an Invenio redirect URL involves a timeout, it can not be cached.

	// $user the user to create Invenio redirect URL for

	// return the Invenio redirect URL or NULL if any errors occur

	public function createInvenioRedirectUrl($user) {

		try {

			$userData = array(

				'email' => $user -> email,

				'fullname' => $user -> name,

				'nickname' => $user -> username,

				'id' => $user -> id,

				'__timeout__' => time() + 60 * 60,

				'__userip__' => $this -> getUserIp()

			);

			$assertion = json_encode($userData);

			$digest = hash_hmac('sha1', $assertion, $this -> invenioPassword);

			$redirectUrl = $this -> invenioUrl . 'youraccount/robotlogin?robot=OpenAIRE_Portal&login_method=OpenAIRE&assertion=' . urlencode($assertion) . '&digest=' . urlencode($digest) . '&referer=' . urlencode($this -> invenioUrl . 'deposit?style=portal&ln=en');

			JLog :: add('Created Invenio redirect URL ' . $redirectUrl . ' (user: ' . $user -> username . ')', JLog :: INFO, self :: LOG);

			return $redirectUrl;

		} catch (Exception $e) {

			JLog :: add('Error creating Invenio redirect URL (user: ' . $user -> username . '): ' . $e -> getMessage(), JLog :: ERROR, self :: LOG);

			return NULL;

		}

	}

	// Create a validator redirect URL. Since a validator redirect URL involves a timeout, it can not be cached.

	// $user the user to create validator redirect URL for

	// return the validator redirect URL or NULL if any errors occur

	public function createValidatorRedirectUrl($user) {

		try {

			$redirectUrl = $this -> validatorUrl;

			if (!$user -> guest) {

				$username  = $user -> username;	

				$ip = $this -> getUserIp();

				$valid = (time() + 60 * 60) * 1000;

				$signature = hash_hmac('sha1', $username . $ip . $valid, $this -> validatorPassword);

				$redirectUrl .= 'portalLogin.action?user=' . urlencode($username) . '&valid=' . urlencode($valid) . '&ip=' . urlencode($ip) . '&signature=' . base64_encode($signature);

			}

			JLog :: add('Created validator redirect URL ' . $redirectUrl . ' (user: ' . ($user -> guest ? 'guest' : $user -> username) . ')', JLog :: INFO, self :: LOG);

			return $redirectUrl;

		} catch (Exception $e) {

			JLog :: add('Error creating validator redirect URL (user: ' . $user -> username . ', referer: ' . $referer . '): ' . $e -> getMessage(), JLog :: ERROR, self :: LOG);

			return NULL;

		}

	}

	private function getUserIp() {

		$ip = NULL;

		if (function_exists('apache_request_headers')) {

			$headers = apache_request_headers();

			if (array_key_exists('X-Forwarded-For', $headers))

				$ip = $headers['X-Forwarded-For'];

		}

		if ($ip === NULL)

			$ip = $_SERVER['REMOTE_ADDR'];

		return $ip;

	}

}