function lti_parse_request($wp)
{
// Note: we should use the base_prefix always as when in site
// blogs the prefix changes to prefixblog_id_, i.e. wp_60_
global $wpdb;
if (empty($_POST['lti_message_type'])) {
return FALSE;
}
// Clear any existing session variables for this plugin
lti_reset_session();
// Deal with magic quotes before they cause OAuth to fail
lti_strip_magic_quotes();
// Do the necessary
$tool = new LTI_Tool_Provider('lti_do_connect', array($wpdb->base_prefix));
$tool->setParameterConstraint('resource_link_id', TRUE, 40);
$tool->setParameterConstraint('user_id', TRUE);
// Get settings and check whether sharing is enabled.
$tool->allowSharing = TRUE;
$tool->execute();
exit;
}
/**
* Get the plugin instance...
*
* @param string|array $callbackHandler
* @return \LTI_Tool_Provider
*/
public function getLtiToolProvider($callbackHandler = null)
{
if (!$this->exists('res.lti.toolProvider')) {
$tool = new \LTI_Tool_Provider($callbackHandler, $this->getLtiDataConnector());
$tool->setParameterConstraint('oauth_consumer_key', TRUE, 50);
$tool->setParameterConstraint('resource_link_id', TRUE, 50);
$tool->setParameterConstraint('user_id', TRUE, 50);
$tool->setParameterConstraint('roles', TRUE);
$this->set('res.lti.toolProvider', $tool);
}
return $this->get('res.lti.toolProvider');
}