VILLASnode/lib/api/requests/universal/channels.cpp

/** The Universal Data-exchange API.
 *
 * @author Steffen Vogel <post@steffenvogel.de>
 * @copyright 2014-2022, Institute for Automation of Complex Power Systems, EONERC
 * @license Apache 2.0
 *********************************************************************************/

#include <villas/utils.hpp>
#include <villas/api/requests/universal.hpp>
#include <villas/api/response.hpp>

namespace villas {
namespace node {
namespace api {
namespace universal {

class SignalsRequest : public UniversalRequest {
public:
	using UniversalRequest::UniversalRequest;

	virtual Response * execute()
	{
		if (method != Session::Method::GET)
			throw InvalidMethod(this);

		if (body != nullptr)
			throw BadRequest("This endpoint does not accept any body data");

		auto *json_sigs = json_array();

		for (size_t i = 0; i < MIN(api_node->getOutputSignals()->size(), api_node->write.channels.size()); i++) {
			auto sig = api_node->getOutputSignals()->at(i);
			auto ch = api_node->write.channels.at(i);
			auto *json_sig = ch->toJson(sig);

			json_array_append(json_sigs, json_sig);
		}

		for (size_t i = 0; i < MIN(api_node->getInputSignals()->size(), api_node->read.channels.size()); i++) {
			auto sig = api_node->getInputSignals()->at(i);
			auto ch = api_node->read.channels.at(i);
			auto *json_sig = ch->toJson(sig);

			json_array_append(json_sigs, json_sig);
		}

		return new JsonResponse(session, HTTP_STATUS_OK, json_sigs);
	}
};

/* Register API requests */
static char n[] = "universal/channels";
static char r[] = "/universal/(" RE_NODE_NAME ")/channels";
static char d[] = "get channels of universal data-exchange API node";
static RequestPlugin<SignalsRequest, n, r, d> p;

} // namespace universal
} // namespace api
} // namespace node
} // namespace villas