/**
* Perform an Outcomes service request.
*
* @param int $action The action type constant
* @param LTI_Outcome $lti_outcome Outcome object
* @param LTI_User $user User object
*
* @return boolean True if the request was successfully processed
*/
public function doOutcomesService($action, $lti_outcome, $user = NULL)
{
$response = FALSE;
$this->ext_response = NULL;
#
### Lookup service details from the source resource link appropriate to the user (in case the destination is being shared)
#
$source_resource_link = $this;
$sourcedid = $lti_outcome->getSourcedid();
if (!is_null($user)) {
$source_resource_link = $user->getResourceLink();
$sourcedid = $user->lti_result_sourcedid;
}
#
### Use LTI 1.1 service in preference to extension service if it is available
#
$urlLTI11 = $source_resource_link->getSetting('lis_outcome_service_url');
$urlExt = $source_resource_link->getSetting('ext_ims_lis_basic_outcome_url');
if ($urlExt || $urlLTI11) {
switch ($action) {
case self::EXT_READ:
if ($urlLTI11 && $lti_outcome->type == self::EXT_TYPE_DECIMAL) {
$do = 'readResult';
} else {
if ($urlExt) {
$urlLTI11 = NULL;
$do = 'basic-lis-readresult';
}
}
break;
case self::EXT_WRITE:
if ($urlLTI11 && $this->checkValueType($lti_outcome, array(self::EXT_TYPE_DECIMAL))) {
$do = 'replaceResult';
} else {
if ($this->checkValueType($lti_outcome)) {
$urlLTI11 = NULL;
$do = 'basic-lis-updateresult';
}
}
break;
case self::EXT_DELETE:
if ($urlLTI11 && $lti_outcome->type == self::EXT_TYPE_DECIMAL) {
$do = 'deleteResult';
} else {
if ($urlExt) {
$urlLTI11 = NULL;
$do = 'basic-lis-deleteresult';
}
}
break;
}
}
if (isset($do)) {
$value = $lti_outcome->getValue();
if (is_null($value)) {
$value = '';
}
if ($urlLTI11) {
$xml = '';
if ($action == self::EXT_WRITE) {
$xml = <<<EOF
\t\t\t\t<result>
\t\t\t\t\t<resultScore>
\t\t\t\t\t\t<language>{$lti_outcome->language}</language>
\t\t\t\t\t\t<textString>{$value}</textString>
\t\t\t\t\t</resultScore>
\t\t\t\t</result>
EOF;
}
$sourcedid = htmlentities($sourcedid);
$xml = <<<EOF
\t\t\t<resultRecord>
\t\t\t\t<sourcedGUID>
\t\t\t\t\t<sourcedId>{$sourcedid}</sourcedId>
\t\t\t\t</sourcedGUID>{$xml}
\t\t\t</resultRecord>
EOF;
if ($this->doLTI11Service($do, $urlLTI11, $xml)) {
switch ($action) {
case self::EXT_READ:
if (!isset($this->ext_nodes['imsx_POXBody']["{$do}Response"]['result']['resultScore']['textString'])) {
break;
} else {
$lti_outcome->setValue($this->ext_nodes['imsx_POXBody']["{$do}Response"]['result']['resultScore']['textString']);
}
case self::EXT_WRITE:
case self::EXT_DELETE:
$response = TRUE;
break;
}
}
} else {
$params = array();
$params['sourcedid'] = $sourcedid;
$params['result_resultscore_textstring'] = $value;
if (!empty($lti_outcome->language)) {
$params['result_resultscore_language'] = $lti_outcome->language;
}
if (!empty($lti_outcome->status)) {
$params['result_statusofresult'] = $lti_outcome->status;
}
if (!empty($lti_outcome->date)) {
$params['result_date'] = $lti_outcome->date;
}
if (!empty($lti_outcome->type)) {
$params['result_resultvaluesourcedid'] = $lti_outcome->type;
}
if (!empty($lti_outcome->data_source)) {
$params['result_datasource'] = $lti_outcome->data_source;
}
if ($this->doService($do, $urlExt, $params)) {
switch ($action) {
case self::EXT_READ:
if (isset($this->ext_nodes['result']['resultscore']['textstring'])) {
$response = $this->ext_nodes['result']['resultscore']['textstring'];
}
break;
case self::EXT_WRITE:
case self::EXT_DELETE:
$response = TRUE;
break;
}
}
}
if (is_array($response) && count($response) <= 0) {
$response = '';
}
}
return $response;
}
