public function handleResponse(array $nodes, ResourceLink $link)
{
if (isset($nodes['imsx_POXBody']['readResultResponse']['result']['resultScore']['textString'])) {
$this->outcome->setValue($nodes['imsx_POXBody']['readResultResponse']['result']['resultScore']['textString']);
return true;
}
return false;
}
public function asXML()
{
$sourcedId = htmlentities($this->user->ltiResultSourcedId);
$language = $this->outcome->language;
$value = $this->outcome->getValue() ?: '';
$xml = <<<EOF
<resultRecord>
<sourcedGUID>
<sourcedId>{$sourcedId}</sourcedId>
</sourcedGUID>
<result>
<resultScore>
<language>{$language}</language>
<textString>{$value}</textString>
</resultScore>
</result>
</resultRecord>
EOF;
return $this->wrapXML($xml);
}
/**
* Convert data type of value to a supported type if possible.
*
* @param Outcome $lti_outcome Outcome object
* @param string[] $supported_types Array of outcome types to be supported (optional, default is null to use supported types reported in the last launch for this resource link)
*
* @return boolean True if the type/value are valid and supported
*/
private function checkValueType($lti_outcome, $supported_types = null)
{
if (empty($supported_types)) {
$supported_types = explode(',', str_replace(' ', '', strtolower($this->getSetting('ext_ims_lis_resultvalue_sourcedids', self::EXT_TYPE_DECIMAL))));
}
$type = $lti_outcome->type;
$value = $lti_outcome->getValue();
// Check whether the type is supported or there is no value
$ok = in_array($type, $supported_types) || strlen($value) <= 0;
if (!$ok) {
// Convert numeric values to decimal
if ($type == self::EXT_TYPE_PERCENTAGE) {
if (substr($value, -1) == '%') {
$value = substr($value, 0, -1);
}
$ok = is_numeric($value) && $value >= 0 && $value <= 100;
if ($ok) {
$lti_outcome->setValue($value / 100);
$lti_outcome->type = self::EXT_TYPE_DECIMAL;
}
} else {
if ($type == self::EXT_TYPE_RATIO) {
$parts = explode('/', $value, 2);
$ok = count($parts) == 2 && is_numeric($parts[0]) && is_numeric($parts[1]) && $parts[0] >= 0 && $parts[1] > 0;
if ($ok) {
$lti_outcome->setValue($parts[0] / $parts[1]);
$lti_outcome->type = self::EXT_TYPE_DECIMAL;
}
} else {
if ($type == self::EXT_TYPE_LETTER_AF) {
// Convert letter_af to letter_af_plus or text
if (in_array(self::EXT_TYPE_LETTER_AF_PLUS, $supported_types)) {
$ok = true;
$lti_outcome->type = self::EXT_TYPE_LETTER_AF_PLUS;
} else {
if (in_array(self::EXT_TYPE_TEXT, $supported_types)) {
$ok = true;
$lti_outcome->type = self::EXT_TYPE_TEXT;
}
}
} else {
if ($type == self::EXT_TYPE_LETTER_AF_PLUS) {
// Convert letter_af_plus to letter_af or text
if (in_array(self::EXT_TYPE_LETTER_AF, $supported_types) && strlen($value) == 1) {
$ok = true;
$lti_outcome->type = self::EXT_TYPE_LETTER_AF;
} else {
if (in_array(self::EXT_TYPE_TEXT, $supported_types)) {
$ok = true;
$lti_outcome->type = self::EXT_TYPE_TEXT;
}
}
} else {
if ($type == self::EXT_TYPE_TEXT) {
// Convert text to decimal
$ok = is_numeric($value) && $value >= 0 && $value <= 1;
if ($ok) {
$lti_outcome->type = self::EXT_TYPE_DECIMAL;
} else {
if (substr($value, -1) == '%') {
$value = substr($value, 0, -1);
$ok = is_numeric($value) && $value >= 0 && $value <= 100;
if ($ok) {
if (in_array(self::EXT_TYPE_PERCENTAGE, $supported_types)) {
$lti_outcome->type = self::EXT_TYPE_PERCENTAGE;
} else {
$lti_outcome->setValue($value / 100);
$lti_outcome->type = self::EXT_TYPE_DECIMAL;
}
}
}
}
}
}
}
}
}
}
return $ok;
}
