Method HandleGET_nodes

Modules/RESTAPI/src/mitkDataStorageController.cpp:909–1021

}

void DataStorageController::HandleGET_nodes(const httplib::Request& req, httplib::Response& res)
{
  if (!m_Bridge.HasDataStorage())
  {
    this->SendErrorResponse(res, 503, ErrorResponse::DataStorageNotAvailable(req.path));
    return;
  }

  // Parse query parameters
  NodeQueryParams params;
  try
  {
    params = this->ParseNodeQueryParams(req);
  }
  catch (const InvalidQueryParam& e)
  {
    this->SendErrorResponse(res, 400, ErrorResponse::InvalidRequest(e.detail, req.path));
    return;
  }

  auto queryResult = m_Bridge.GetNodes(params);

  int returnedCount = static_cast<int>(queryResult.nodes.size());

  nlohmann::json response;
  response["data"] = queryResult.nodes;
  response["meta"]["total_count"] = queryResult.totalCount;
  response["meta"]["limit"] = queryResult.limit;
  response["meta"]["offset"] = queryResult.offset;
  response["meta"]["returned_count"] = returnedCount;

  // Include pagination links if applicable
  auto links = BuildPaginationLinks(req, queryResult.limit, queryResult.offset, queryResult.totalCount, returnedCount);
  if (!links.empty())
  {
    response["meta"]["links"] = links;
  }

  // Include query info: context, filters, sorting, field limitations
  response["meta"]["context"] = params.context.has_value() ? nlohmann::json(params.context.value()) : nlohmann::json(nullptr);

  // Property scope
  std::string scopeStr = "all";
  if (params.propertyScope == PropertyScope::Node)
  {
    scopeStr = "node";
  }
  else if (params.propertyScope == PropertyScope::Data)
  {
    scopeStr = "data";
  }
  response["meta"]["property_scope"] = scopeStr;

  // Echo the request's path filter back in meta as path_query (see "Path Query
  // Response" in the MITK REST API specification under Documentation/).
  if (params.path.has_value())
  {
    response["meta"]["path_query"] = params.path.value();