/* * Copyright (c) 2019-2020 GeyserMC. http://geysermc.org * * 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. * * @author GeyserMC * @link https://github.com/GeyserMC/Geyser */package org.geysermc.connector.network.translators.java;import com.github.steveice10.mc.protocol.packet.ingame.client.ClientPluginMessagePacket;import com.github.steveice10.mc.protocol.packet.ingame.server.ServerPluginMessagePacket;import com.google.common.base.Charsets;import org.geysermc.connector.common.AuthType;import org.geysermc.connector.network.session.GeyserSession;import org.geysermc.connector.network.translators.PacketTranslator;import org.geysermc.connector.network.translators.Translator;import org.geysermc.cumulus.Form;import org.geysermc.cumulus.Forms;import org.geysermc.cumulus.util.FormType;import java.nio.charset.StandardCharsets;@Translator(packet = ServerPluginMessagePacket.class)public class JavaPluginMessageTranslator extends PacketTranslator<ServerPluginMessagePacket> {    @Override    public void translate(GeyserSession session, ServerPluginMessagePacket packet) {        // The only plugin messages it has to listen for are Floodgate plugin messages        if (session.getRemoteAuthType() != AuthType.FLOODGATE) {            return;        }        String channel = packet.getChannel();        if (channel.equals("floodgate:form")) {            byte[] data = packet.getData();            // receive: first byte is form type, second and third are the id, remaining is the form data            // respond: first and second byte id, remaining is form response data            FormType type = FormType.getByOrdinal(data[0]);            if (type == null) {                throw new NullPointerException(                        "Got type " + data[0] + " which isn't a valid form type!");            }            String dataString = new String(data, 3, data.length - 3, Charsets.UTF_8);            Form form = Forms.fromJson(dataString, type);            form.setResponseHandler(response -> {                byte[] raw = response.getBytes(StandardCharsets.UTF_8);                byte[] finalData = new byte[raw.length + 2];                finalData[0] = data[1];                finalData[1] = data[2];                System.arraycopy(raw, 0, finalData, 2, raw.length);                session.sendDownstreamPacket(new ClientPluginMessagePacket(channel, finalData));            });            session.sendForm(form);        }    }}