/**
* sign request data with OAuth
*
* @param array ( "method => signature methos
* "key" => consumer key
* "secret" => shared secret
* "token" => request token
* "url" => request url
* data => array (key => value)
* )
*
* @return array signed data
*/
private static function signOAuth($a_params)
{
require_once './Customizing/global/plugins/Services/Repository/RepositoryObject/ExternalContent/lib/OAuth.php';
switch ($a_params['sign_method']) {
case "HMAC_SHA1":
$method = new OAuthSignatureMethod_HMAC_SHA1();
break;
case "PLAINTEXT":
$method = new OAuthSignatureMethod_PLAINTEXT();
break;
case "RSA_SHA1":
$method = new OAuthSignatureMethod_RSA_SHA1();
break;
default:
return "ERROR: unsupported signature method!";
}
$consumer = new OAuthConsumer($a_params["key"], $a_params["secret"], $a_params["callback"]);
$request = OAuthRequest::from_consumer_and_token($consumer, $a_params["token"], $a_params["http_method"], $a_params["url"], $a_params["data"]);
$request->sign_request($method, $consumer, $a_params["token"]);
// Pass this back up "out of band" for debugging
self::$last_oauth_base_string = $request->get_signature_base_string();
return $request->get_parameters();
}
/**
* Apply a function with parameters to fill a field
*
* @param $a_field
* @param $a_maxdepth
* @return unknown_type
*/
private function fillCalculatedField($a_field, $a_maxdepth)
{
// process the function parameters
$parsed_params = array();
foreach ($a_field['params'] as $param_name => $param_value) {
foreach ($this->fields as $field_name => $field) {
if ($param_value == $this->typedef->getPlaceholder($field_name)) {
$param_value = $this->fillField($field, $a_maxdepth);
}
$parsed_params[$param_name] = $param_value;
}
}
// apply the function
require_once "./Customizing/global/plugins/Services/Repository/RepositoryObject/ExternalContent/classes/class.ilExternalContentFunctions.php";
$value = ilExternalContentFunctions::applyFunction($a_field['function'], $parsed_params);
// save the value so that it is not re-calculated
$this->fields[$a_field['field_name']]['field_value'] = $value;
return $value;
}