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This package contains the groups membership management client plugin for drasyl.

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/*
 * Copyright (c) 2020-2021 Heiko Bornholdt and Kevin Röbert
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
 * OR OTHER DEALINGS IN THE SOFTWARE.
 */
package org.drasyl.node.plugin.groups.client;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import org.drasyl.channel.OverlayAddressedMessage;
import org.drasyl.node.plugin.groups.client.message.GroupJoinFailedMessage;
import org.drasyl.node.plugin.groups.client.message.GroupWelcomeMessage;
import org.drasyl.node.plugin.groups.client.message.GroupsServerMessage;
import org.drasyl.node.plugin.groups.client.message.MemberJoinedMessage;
import org.drasyl.node.plugin.groups.client.message.MemberLeftMessage;

import java.util.List;

import static org.drasyl.node.plugin.groups.client.GroupsServerMessageEncoder.MAGIC_NUMBER_FAILED;
import static org.drasyl.node.plugin.groups.client.GroupsServerMessageEncoder.MAGIC_NUMBER_JOINED;
import static org.drasyl.node.plugin.groups.client.GroupsServerMessageEncoder.MAGIC_NUMBER_LEFT;
import static org.drasyl.node.plugin.groups.client.GroupsServerMessageEncoder.MAGIC_NUMBER_WELCOME;

/**
 * Decodes {@link ByteBuf}s  to {@link GroupsServerMessage}s.
 */
class GroupsServerMessageDecoder extends MessageToMessageDecoder> {
    @Override
    public boolean acceptInboundMessage(final Object msg) {
        return msg instanceof OverlayAddressedMessage && ((OverlayAddressedMessage) msg).content() instanceof ByteBuf;
    }

    @Override
    protected void decode(final ChannelHandlerContext ctx,
                          final OverlayAddressedMessage msg,
                          final List