mirror of https://github.com/GeyserMC/Geyser.git
218 lines
8.6 KiB
Java
218 lines
8.6 KiB
Java
/*
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* Copyright (c) 2019-2022 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.geyser.level;
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import com.github.steveice10.mc.protocol.data.game.entity.player.GameMode;
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import com.github.steveice10.mc.protocol.data.game.level.block.BlockEntityInfo;
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import com.github.steveice10.mc.protocol.data.game.setting.Difficulty;
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import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
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import org.checkerframework.checker.nullness.qual.NonNull;
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import org.checkerframework.checker.nullness.qual.Nullable;
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import org.cloudburstmc.math.vector.Vector3i;
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import org.geysermc.erosion.util.BlockPositionIterator;
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import org.geysermc.geyser.session.GeyserSession;
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import java.util.List;
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import java.util.Locale;
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import java.util.concurrent.CompletableFuture;
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/**
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* Class that manages or retrieves various information
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* from the world. Everything in this class should be
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* safe to return null or an empty value in the event
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* that chunk caching or anything of the sort is disabled
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* on the standalone version of Geyser.
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*/
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public abstract class WorldManager {
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/**
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* Gets the Java block state at the specified location
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*
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* @param session the session
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* @param vector the position
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* @return the block state at the specified location
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*/
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public final int getBlockAt(GeyserSession session, Vector3i vector) {
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return this.getBlockAt(session, vector.getX(), vector.getY(), vector.getZ());
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}
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/**
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* Gets the Java block state at the specified location
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*
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* @param session the session
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* @param x the x coordinate to get the block at
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* @param y the y coordinate to get the block at
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* @param z the z coordinate to get the block at
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* @return the block state at the specified location
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*/
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public abstract int getBlockAt(GeyserSession session, int x, int y, int z);
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public final CompletableFuture<Integer> getBlockAtAsync(GeyserSession session, Vector3i vector) {
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return this.getBlockAtAsync(session, vector.getX(), vector.getY(), vector.getZ());
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}
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public CompletableFuture<Integer> getBlockAtAsync(GeyserSession session, int x, int y, int z) {
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return CompletableFuture.completedFuture(this.getBlockAt(session, x, y, z));
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}
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public int[] getBlocksAt(GeyserSession session, BlockPositionIterator iter) {
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int[] blocks = new int[iter.getMaxIterations()];
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for (; iter.hasNext(); iter.next()) {
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int networkId = this.getBlockAt(session, iter.getX(), iter.getY(), iter.getZ());
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blocks[iter.getIteration()] = networkId;
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}
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return blocks;
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}
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/**
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* Checks whether or not this world manager requires a separate chunk cache/has access to more block data than the chunk cache.
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* <p>
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* Some world managers (e.g. Spigot) can provide access to block data outside of the chunk cache, and even with chunk caching disabled. This
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* method provides a means to check if this manager has this capability.
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*
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* @return whether or not this world manager has access to more block data than the chunk cache
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*/
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public abstract boolean hasOwnChunkCache();
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/**
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* Sigh. <br>
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*
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* So, on Java Edition, the lectern is an inventory. Java opens it and gets the contents of the book there.
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* On Bedrock, the lectern contents are part of the block entity tag. Therefore, Bedrock expects to have the contents
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* of the lectern ready and present in the world. If the contents are not there, it takes at least two clicks for the
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* lectern to update the tag and then present itself. <br>
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*
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* We solve this problem by querying all loaded lecterns, where possible, and sending their information in a block entity
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* tag.
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* <p>
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* Note that the lectern data may be sent asynchronously.
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*
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* @param session the session of the player
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* @param x the x coordinate of the lectern
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* @param y the y coordinate of the lectern
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* @param z the z coordinate of the lectern
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*/
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public abstract void sendLecternData(GeyserSession session, int x, int y, int z);
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/**
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* {@link #sendLecternData(GeyserSession, int, int, int)} but batched for chunks.
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*
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* @param x chunk x
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* @param z chunk z
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* @param blockEntityInfos a list of coordinates (chunk local) to grab lecterns from.
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*/
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public abstract void sendLecternData(GeyserSession session, int x, int z, List<BlockEntityInfo> blockEntityInfos);
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/**
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* @return whether we should expect lectern data to update, or if we have to fall back on a workaround.
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*/
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public abstract boolean shouldExpectLecternHandled(GeyserSession session);
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/**
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* Updates a gamerule value on the Java server
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*
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* @param session The session of the user that requested the change
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* @param name The gamerule to change
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* @param value The new value for the gamerule
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*/
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public void setGameRule(GeyserSession session, String name, Object value) {
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session.sendCommand("gamerule " + name + " " + value);
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}
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/**
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* Gets a gamerule value as a boolean
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*
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* @param session The session of the user that requested the value
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* @param gameRule The gamerule to fetch the value of
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* @return The boolean representation of the value
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*/
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public abstract boolean getGameRuleBool(GeyserSession session, GameRule gameRule);
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/**
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* Get a gamerule value as an integer
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*
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* @param session The session of the user that requested the value
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* @param gameRule The gamerule to fetch the value of
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* @return The integer representation of the value
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*/
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public abstract int getGameRuleInt(GeyserSession session, GameRule gameRule);
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/**
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* Change the game mode of the given session
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*
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* @param session The session of the player to change the game mode of
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* @param gameMode The game mode to change the player to
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*/
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public void setPlayerGameMode(GeyserSession session, GameMode gameMode) {
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session.sendCommand("gamemode " + gameMode.name().toLowerCase(Locale.ROOT));
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}
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/**
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* Get the default game mode of the server
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*
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* @param session the player requesting the default game mode
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* @return the default game mode of the server, or Survival if unknown.
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*/
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public abstract GameMode getDefaultGameMode(GeyserSession session);
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/**
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* Change the default game mode of the session's server
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*
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* @param session the player making the change
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* @param gameMode the new default game mode
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*/
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public void setDefaultGameMode(GeyserSession session, GameMode gameMode) {
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session.sendCommand("defaultgamemode " + gameMode.name().toLowerCase(Locale.ROOT));
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}
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/**
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* Change the difficulty of the Java server
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*
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* @param session The session of the user that requested the change
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* @param difficulty The difficulty to change to
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*/
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public void setDifficulty(GeyserSession session, Difficulty difficulty) {
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session.sendCommand("difficulty " + difficulty.name().toLowerCase(Locale.ROOT));
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}
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/**
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* Returns a list of biome identifiers available on the server.
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*/
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public String @Nullable [] getBiomeIdentifiers(boolean withTags) {
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return null;
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}
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/**
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* Used for pick block, so we don't need to cache more data than necessary.
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*
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* @return expected NBT for this item.
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*/
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@NonNull
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public CompletableFuture<@Nullable CompoundTag> getPickItemNbt(GeyserSession session, int x, int y, int z, boolean addNbtData) {
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return CompletableFuture.completedFuture(null);
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}
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}
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