TraCIServerAPI_InductionLoop.cpp

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// Eclipse SUMO, Simulation of Urban MObility; see https://eclipse.dev/sumo
// Copyright (C) 2009-2025 German Aerospace Center (DLR) and others.
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0/
// This Source Code may also be made available under the following Secondary
// Licenses when the conditions for such availability set forth in the Eclipse
// Public License 2.0 are satisfied: GNU General Public License, version 2
// or later which is available at
// https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html
// SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
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// APIs for getting/setting induction loop values via TraCI
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#include <config.h>
 
#include <microsim/MSNet.h>
#include <microsim/output/MSDetectorControl.h>
#include <libsumo/InductionLoop.h>
#include <libsumo/TraCIConstants.h>
#include <libsumo/StorageHelper.h>
#include "TraCIServerAPI_InductionLoop.h"
 
 
// ===========================================================================
// method definitions
// ===========================================================================
bool
TraCIServerAPI_InductionLoop::processGet(TraCIServer& server, tcpip::Storage& inputStorage,
        tcpip::Storage& outputStorage) {
    const int variable = inputStorage.readUnsignedByte();
    const std::string id = inputStorage.readString();
    server.initWrapper(libsumo::RESPONSE_GET_INDUCTIONLOOP_VARIABLE, variable, id);
    try {
        if (!libsumo::InductionLoop::handleVariable(id, variable, &server, &inputStorage)) {
            return server.writeErrorStatusCmd(libsumo::CMD_GET_INDUCTIONLOOP_VARIABLE,
                                              "Get Induction Loop Variable: unsupported variable " + toHex(variable, 2)
                                              + " specified", outputStorage);
        }
    } catch (libsumo::TraCIException& e) {
        return server.writeErrorStatusCmd(libsumo::CMD_GET_INDUCTIONLOOP_VARIABLE, e.what(), outputStorage);
    }
    server.writeStatusCmd(libsumo::CMD_GET_INDUCTIONLOOP_VARIABLE, libsumo::RTYPE_OK, "", outputStorage);
    server.writeResponseWithLength(outputStorage, server.getWrapperStorage());
    return true;
}
 
 
bool
TraCIServerAPI_InductionLoop::processSet(TraCIServer& server, tcpip::Storage& inputStorage,
        tcpip::Storage& outputStorage) {
    std::string warning = ""; // additional description for response
    // variable
    int variable = inputStorage.readUnsignedByte();
    if (variable != libsumo::VAR_PARAMETER
            && variable != libsumo::VAR_VIRTUAL_DETECTION
       ) {
        return server.writeErrorStatusCmd(libsumo::CMD_SET_INDUCTIONLOOP_VARIABLE, "Set Induction Variable: unsupported variable " + toHex(variable, 2) + " specified", outputStorage);
    }
    // id
    std::string id = inputStorage.readString();
    // process
    try {
        switch (variable) {
            case libsumo::VAR_VIRTUAL_DETECTION: {
                double time = -1;
                if (!server.readTypeCheckingDouble(inputStorage, time)) {
                    return server.writeErrorStatusCmd(libsumo::CMD_SET_INDUCTIONLOOP_VARIABLE, "Setting time since last detection requires a double.", outputStorage);
                }
                libsumo::InductionLoop::overrideTimeSinceDetection(id, time);
                break;
            }
            case libsumo::VAR_PARAMETER: {
                StoHelp::readCompound(inputStorage, 2, "A compound object of size 2 is needed for setting a parameter.");
                const std::string name = StoHelp::readTypedString(inputStorage, "The name of the parameter must be given as a string.");
                const std::string value = StoHelp::readTypedString(inputStorage, "The value of the parameter must be given as a string.");
                libsumo::InductionLoop::setParameter(id, name, value);
                break;
            }
            default:
                break;
        }
    } catch (libsumo::TraCIException& e) {
        return server.writeErrorStatusCmd(libsumo::CMD_SET_INDUCTIONLOOP_VARIABLE, e.what(), outputStorage);
    }
    server.writeStatusCmd(libsumo::CMD_SET_INDUCTIONLOOP_VARIABLE, libsumo::RTYPE_OK, warning, outputStorage);
    return true;
}
 
 
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