forked from GeyserMC/Geyser
76 lines
3.0 KiB
Java
76 lines
3.0 KiB
Java
/*
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* Copyright (c) 2019-2021 GeyserMC. http://geysermc.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @author GeyserMC
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* @link https://github.com/GeyserMC/Geyser
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*/
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package org.geysermc.connector.network.session.cache;
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import com.github.steveice10.mc.protocol.data.game.entity.metadata.ItemStack;
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import com.github.steveice10.mc.protocol.packet.ingame.client.window.ClientEditBookPacket;
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import lombok.Setter;
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import org.geysermc.connector.network.session.GeyserSession;
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import org.geysermc.connector.network.translators.item.ItemRegistry;
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/**
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* Manages updating the current writable book.
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*
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* Java sends book updates less frequently than Bedrock, and this can cause issues with servers that rate limit
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* book packets. Because of this, we need to ensure packets are only send every second or so at maximum.
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*/
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public class BookEditCache {
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private final GeyserSession session;
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@Setter
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private ClientEditBookPacket packet;
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/**
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* Stores the last time a book update packet was sent to the server.
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*/
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private long lastBookUpdate;
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public BookEditCache(GeyserSession session) {
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this.session = session;
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}
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/**
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* Check to see if there is a book edit update to send, and if so, send it.
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*/
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public void checkForSend() {
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if (packet == null) {
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// No new packet has to be sent
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return;
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}
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// Prevent kicks due to rate limiting - specifically on Spigot servers
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if ((System.currentTimeMillis() - lastBookUpdate) < 1000) {
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return;
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}
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// Don't send the update if the player isn't not holding a book, shouldn't happen if we catch all interactions
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ItemStack itemStack = session.getInventory().getItemInHand();
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if (itemStack == null || itemStack.getId() != ItemRegistry.WRITABLE_BOOK.getJavaId()) {
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packet = null;
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return;
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}
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session.getDownstream().getSession().send(packet);
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packet = null;
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lastBookUpdate = System.currentTimeMillis();
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}
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}
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