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package org.traccar.http;

import javax.json.Json;
import javax.json.JsonObject;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.traccar.Context;
import org.traccar.command.CommandType;
import org.traccar.command.GpsCommand;
import org.traccar.database.ActiveDevice;

public class CommandsServlet extends BaseServlet {

    @Override
    protected boolean handle(String command, HttpServletRequest req, HttpServletResponse resp) throws Exception {
        
        switch (command) {
            case "/send":
                send(req, resp);
                return true;
            case "/raw":
                sendRawCommand(req, resp);
                return true;
            default:
                return false;
        }
    }

    private void send(HttpServletRequest req, HttpServletResponse resp) throws Exception {
        GpsCommand command = JsonConverter.<GpsCommand>enumObjectFromJson(req.getReader(), new EnumFactory(CommandType.class, "type"));

        String uniqueId = command.getUniqueId();

        ActiveDevice activeDevice = Context.getConnectionManager().getActiveDevice(uniqueId);
        if(activeDevice == null) {
            throw new RuntimeException("The device has not yet registered to the server");
        }

        activeDevice.sendCommand(command);

        sendResponse(resp.getWriter(), JsonConverter.objectToJson(new Object()));
    }

    private void sendRawCommand(HttpServletRequest req, HttpServletResponse resp) throws Exception {
        JsonObject json = Json.createReader(req.getReader()).readObject();
        String uniqueId = json.getString("uniqueId");

        ActiveDevice activeDevice = Context.getConnectionManager().getActiveDevice(uniqueId);
        if(activeDevice == null) {
            throw new RuntimeException("The device has not yet registered to the server");
        }

        String command = json.getString("command");
        activeDevice.write(command);

        sendResponse(resp.getWriter(), JsonConverter.objectToJson(new Object()));
    }
}