ApiController::getSearchService PHP Method

    private function getSearchService($resource_type, array &$params)
    {
        $profiles = isset($params['_profile']) ? array($params['_profile']) : array();
        $service = Yii::app()->service->getFhirService($resource_type, $profiles);
        if (!$service) {
            return;
        }
        // If a profile was supplied it must match
        if (isset($params['_profile'])) {
            $resource_class = $service->getResourceClass();
            if ($resource_class::getOeFhirProfile() != $params['_profile']) {
                return;
            }
        }
        // Special case for when there's a resource ID as part of the search (which doesn't seem very useful...)
        if (isset($params['_id'])) {
            if (!($ref = Yii::app()->service->fhirIdToReference($resource_type, $params['_id']))) {
                // Not an error: we support the resource type, you just asked for an ID that doesn't exist
                return;
            }
            $params['id'] = $ref->getId();
            if ($ref->getServiceName() != $service::getServiceName()) {
                // service mismatch
                return;
            }
        }
        return $service;
    }