org.syphr.mythtv.protocol.impl.Command63LockTuner Maven / Gradle / Ivy

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/*
 * Copyright 2011-2012 Gregory P. Moyer
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.syphr.mythtv.protocol.impl;

import java.io.IOException;
import java.util.List;

import org.syphr.mythtv.data.RecorderDevice;
import org.syphr.mythtv.util.exception.CommandException;
import org.syphr.mythtv.util.exception.ProtocolException;
import org.syphr.mythtv.util.exception.ProtocolException.Direction;
import org.syphr.mythtv.util.socket.SocketManager;
import org.syphr.mythtv.util.translate.Translator;

/* default */class Command63LockTuner extends AbstractProtocolCommand
{
    private final int recorderId;

    public Command63LockTuner(Translator translator, Parser parser, int recorderId)
    {
        super(translator, parser);

        this.recorderId = recorderId;
    }

    @Override
    protected String getMessage() throws ProtocolException
    {
        StringBuilder builder = new StringBuilder();
        builder.append("LOCK_TUNER");

        if (recorderId > 0)
        {
            builder.append(' ');
            builder.append(recorderId);
        }

        return builder.toString();
    }

    @Override
    public RecorderDevice send(SocketManager socketManager) throws IOException, CommandException
    {
        String response = socketManager.sendAndWait(getMessage());
        List args = getParser().splitArguments(response);
        if (args.isEmpty())
        {
            throw new ProtocolException(response, Direction.RECEIVE);
        }

        try
        {
            int retRecorderId = Integer.parseInt(args.get(0));

            if (retRecorderId == -2)
            {
                throw new CommandException("Tuner already in use");
            }

            if (retRecorderId == -1)
            {
                throw new CommandException("Unknown recorder ID: " + recorderId);
            }

            if (args.size() < 4)
            {
                throw new ProtocolException(response, Direction.RECEIVE);
            }

            return new RecorderDevice(retRecorderId, args.get(1), args.get(2), args.get(3));
        }
        catch (NumberFormatException e)
        {
            throw new ProtocolException(response, Direction.RECEIVE, e);
        }
    }
}