src/game/java/net/minecraft/client/multiplayer/MultiPlayerGameMode.java

package net.minecraft.client.multiplayer;

import com.google.common.collect.Lists;
import com.mojang.logging.LogUtils;
import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
import it.unimi.dsi.fastutil.ints.Int2ObjectOpenHashMap;
import java.util.List;
import java.util.Objects;
import javax.annotation.Nullable;
import net.minecraft.client.ClientRecipeBook;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.screens.inventory.AbstractContainerScreen;
import net.minecraft.client.gui.screens.inventory.CreativeModeInventoryScreen;
import net.minecraft.client.multiplayer.prediction.BlockStatePredictionHandler;
import net.minecraft.client.multiplayer.prediction.PredictiveAction;
import net.minecraft.client.player.LocalPlayer;
import net.minecraft.client.resources.sounds.SimpleSoundInstance;
import net.minecraft.client.resources.sounds.SoundInstance;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.NonNullList;
import net.minecraft.network.protocol.Packet;
import net.minecraft.network.protocol.game.ServerGamePacketListener;
import net.minecraft.network.protocol.game.ServerboundContainerButtonClickPacket;
import net.minecraft.network.protocol.game.ServerboundContainerClickPacket;
import net.minecraft.network.protocol.game.ServerboundContainerSlotStateChangedPacket;
import net.minecraft.network.protocol.game.ServerboundInteractPacket;
import net.minecraft.network.protocol.game.ServerboundPickItemFromBlockPacket;
import net.minecraft.network.protocol.game.ServerboundPickItemFromEntityPacket;
import net.minecraft.network.protocol.game.ServerboundPlaceRecipePacket;
import net.minecraft.network.protocol.game.ServerboundPlayerActionPacket;
import net.minecraft.network.protocol.game.ServerboundSetCarriedItemPacket;
import net.minecraft.network.protocol.game.ServerboundSetCreativeModeSlotPacket;
import net.minecraft.network.protocol.game.ServerboundUseItemOnPacket;
import net.minecraft.network.protocol.game.ServerboundUseItemPacket;
import net.minecraft.sounds.SoundSource;
import net.minecraft.stats.StatsCounter;
import net.minecraft.util.Mth;
import net.minecraft.world.InteractionHand;
import net.minecraft.world.InteractionResult;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.HasCustomInventoryScreen;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.inventory.AbstractContainerMenu;
import net.minecraft.world.inventory.ClickType;
import net.minecraft.world.inventory.Slot;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.item.context.UseOnContext;
import net.minecraft.world.item.crafting.display.RecipeDisplayId;
import net.minecraft.world.level.GameType;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.GameMasterBlock;
import net.minecraft.world.level.block.SoundType;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.material.FluidState;
import net.minecraft.world.phys.BlockHitResult;
import net.minecraft.world.phys.EntityHitResult;
import net.minecraft.world.phys.Vec3;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;
import org.apache.commons.lang3.mutable.MutableObject;
import org.slf4j.Logger;

@OnlyIn(Dist.CLIENT)
public class MultiPlayerGameMode {
    private static final Logger LOGGER = LogUtils.getLogger();
    private final Minecraft minecraft;
    private final ClientPacketListener connection;
    private BlockPos destroyBlockPos = new BlockPos(-1, -1, -1);
    private ItemStack destroyingItem = ItemStack.EMPTY;
    private float destroyProgress;
    private float destroyTicks;
    private int destroyDelay;
    private boolean isDestroying;
    private GameType localPlayerMode = GameType.DEFAULT_MODE;
    @Nullable
    private GameType previousLocalPlayerMode;
    private int carriedIndex;

    public MultiPlayerGameMode(Minecraft p_105203_, ClientPacketListener p_105204_) {
        this.minecraft = p_105203_;
        this.connection = p_105204_;
    }

    public void adjustPlayer(Player p_105222_) {
        this.localPlayerMode.updatePlayerAbilities(p_105222_.getAbilities());
    }

    public void setLocalMode(GameType p_171806_, @Nullable GameType p_171807_) {
        this.localPlayerMode = p_171806_;
        this.previousLocalPlayerMode = p_171807_;
        this.localPlayerMode.updatePlayerAbilities(this.minecraft.player.getAbilities());
    }

    public void setLocalMode(GameType p_105280_) {
        if (p_105280_ != this.localPlayerMode) {
            this.previousLocalPlayerMode = this.localPlayerMode;
        }

        this.localPlayerMode = p_105280_;
        this.localPlayerMode.updatePlayerAbilities(this.minecraft.player.getAbilities());
    }

    public boolean canHurtPlayer() {
        return this.localPlayerMode.isSurvival();
    }

    public boolean destroyBlock(BlockPos p_105268_) {
        if (this.minecraft.player.blockActionRestricted(this.minecraft.level, p_105268_, this.localPlayerMode)) {
            return false;
        } else {
            Level level = this.minecraft.level;
            BlockState blockstate = level.getBlockState(p_105268_);
            if (!this.minecraft.player.getMainHandItem().getItem().canAttackBlock(blockstate, level, p_105268_, this.minecraft.player)) {
                return false;
            } else {
                Block block = blockstate.getBlock();
                if (block instanceof GameMasterBlock && !this.minecraft.player.canUseGameMasterBlocks()) {
                    return false;
                } else if (blockstate.isAir()) {
                    return false;
                } else {
                    block.playerWillDestroy(level, p_105268_, blockstate, this.minecraft.player);
                    FluidState fluidstate = level.getFluidState(p_105268_);
                    boolean flag = level.setBlock(p_105268_, fluidstate.createLegacyBlock(), 11);
                    if (flag) {
                        block.destroy(level, p_105268_, blockstate);
                    }

                    return flag;
                }
            }
        }
    }

    public boolean startDestroyBlock(BlockPos p_105270_, Direction p_105271_) {
        if (this.minecraft.player.blockActionRestricted(this.minecraft.level, p_105270_, this.localPlayerMode)) {
            return false;
        } else if (!this.minecraft.level.getWorldBorder().isWithinBounds(p_105270_)) {
            return false;
        } else {
            if (this.localPlayerMode.isCreative()) {
                BlockState blockstate = this.minecraft.level.getBlockState(p_105270_);
                this.minecraft.getTutorial().onDestroyBlock(this.minecraft.level, p_105270_, blockstate, 1.0F);
                this.startPrediction(this.minecraft.level, p_233757_ -> {
                    this.destroyBlock(p_105270_);
                    return new ServerboundPlayerActionPacket(ServerboundPlayerActionPacket.Action.START_DESTROY_BLOCK, p_105270_, p_105271_, p_233757_);
                });
                this.destroyDelay = 5;
            } else if (!this.isDestroying || !this.sameDestroyTarget(p_105270_)) {
                if (this.isDestroying) {
                    this.connection
                        .send(new ServerboundPlayerActionPacket(ServerboundPlayerActionPacket.Action.ABORT_DESTROY_BLOCK, this.destroyBlockPos, p_105271_));
                }

                BlockState blockstate1 = this.minecraft.level.getBlockState(p_105270_);
                this.minecraft.getTutorial().onDestroyBlock(this.minecraft.level, p_105270_, blockstate1, 0.0F);
                this.startPrediction(this.minecraft.level, p_233728_ -> {
                    boolean flag = !blockstate1.isAir();
                    if (flag && this.destroyProgress == 0.0F) {
                        blockstate1.attack(this.minecraft.level, p_105270_, this.minecraft.player);
                    }

                    if (flag && blockstate1.getDestroyProgress(this.minecraft.player, this.minecraft.player.level(), p_105270_) >= 1.0F) {
                        this.destroyBlock(p_105270_);
                    } else {
                        this.isDestroying = true;
                        this.destroyBlockPos = p_105270_;
                        this.destroyingItem = this.minecraft.player.getMainHandItem();
                        this.destroyProgress = 0.0F;
                        this.destroyTicks = 0.0F;
                        this.minecraft.level.destroyBlockProgress(this.minecraft.player.getId(), this.destroyBlockPos, this.getDestroyStage());
                    }

                    return new ServerboundPlayerActionPacket(ServerboundPlayerActionPacket.Action.START_DESTROY_BLOCK, p_105270_, p_105271_, p_233728_);
                });
            }

            return true;
        }
    }

    public void stopDestroyBlock() {
        if (this.isDestroying) {
            BlockState blockstate = this.minecraft.level.getBlockState(this.destroyBlockPos);
            this.minecraft.getTutorial().onDestroyBlock(this.minecraft.level, this.destroyBlockPos, blockstate, -1.0F);
            this.connection
                .send(new ServerboundPlayerActionPacket(ServerboundPlayerActionPacket.Action.ABORT_DESTROY_BLOCK, this.destroyBlockPos, Direction.DOWN));
            this.isDestroying = false;
            this.destroyProgress = 0.0F;
            this.minecraft.level.destroyBlockProgress(this.minecraft.player.getId(), this.destroyBlockPos, -1);
            this.minecraft.player.resetAttackStrengthTicker();
        }
    }

    public boolean continueDestroyBlock(BlockPos p_105284_, Direction p_105285_) {
        this.ensureHasSentCarriedItem();
        if (this.destroyDelay > 0) {
            this.destroyDelay--;
            return true;
        } else if (this.localPlayerMode.isCreative() && this.minecraft.level.getWorldBorder().isWithinBounds(p_105284_)) {
            this.destroyDelay = 5;
            BlockState blockstate1 = this.minecraft.level.getBlockState(p_105284_);
            this.minecraft.getTutorial().onDestroyBlock(this.minecraft.level, p_105284_, blockstate1, 1.0F);
            this.startPrediction(this.minecraft.level, p_233753_ -> {
                this.destroyBlock(p_105284_);
                return new ServerboundPlayerActionPacket(ServerboundPlayerActionPacket.Action.START_DESTROY_BLOCK, p_105284_, p_105285_, p_233753_);
            });
            return true;
        } else if (this.sameDestroyTarget(p_105284_)) {
            BlockState blockstate = this.minecraft.level.getBlockState(p_105284_);
            if (blockstate.isAir()) {
                this.isDestroying = false;
                return false;
            } else {
                this.destroyProgress = this.destroyProgress + blockstate.getDestroyProgress(this.minecraft.player, this.minecraft.player.level(), p_105284_);
                if (this.destroyTicks % 4.0F == 0.0F) {
                    SoundType soundtype = blockstate.getSoundType();
                    this.minecraft
                        .getSoundManager()
                        .play(
                            new SimpleSoundInstance(
                                soundtype.getHitSound(),
                                SoundSource.BLOCKS,
                                (soundtype.getVolume() + 1.0F) / 8.0F,
                                soundtype.getPitch() * 0.5F,
                                SoundInstance.createUnseededRandom(),
                                p_105284_
                            )
                        );
                }

                this.destroyTicks++;
                this.minecraft.getTutorial().onDestroyBlock(this.minecraft.level, p_105284_, blockstate, Mth.clamp(this.destroyProgress, 0.0F, 1.0F));
                if (this.destroyProgress >= 1.0F) {
                    this.isDestroying = false;
                    this.startPrediction(this.minecraft.level, p_233739_ -> {
                        this.destroyBlock(p_105284_);
                        return new ServerboundPlayerActionPacket(ServerboundPlayerActionPacket.Action.STOP_DESTROY_BLOCK, p_105284_, p_105285_, p_233739_);
                    });
                    this.destroyProgress = 0.0F;
                    this.destroyTicks = 0.0F;
                    this.destroyDelay = 5;
                }

                this.minecraft.level.destroyBlockProgress(this.minecraft.player.getId(), this.destroyBlockPos, this.getDestroyStage());
                return true;
            }
        } else {
            return this.startDestroyBlock(p_105284_, p_105285_);
        }
    }

    private void startPrediction(ClientLevel p_233730_, PredictiveAction p_233731_) {
        try (BlockStatePredictionHandler blockstatepredictionhandler = p_233730_.getBlockStatePredictionHandler().startPredicting()) {
            int i = blockstatepredictionhandler.currentSequence();
            Packet<ServerGamePacketListener> packet = p_233731_.predict(i);
            this.connection.send(packet);
        }
    }

    public void tick() {
        this.ensureHasSentCarriedItem();
        if (this.connection.getConnection().isConnected()) {
            this.connection.getConnection().tick();
        } else {
            this.connection.getConnection().handleDisconnection();
        }
    }

    private boolean sameDestroyTarget(BlockPos p_105282_) {
        ItemStack itemstack = this.minecraft.player.getMainHandItem();
        return p_105282_.equals(this.destroyBlockPos) && ItemStack.isSameItemSameComponents(itemstack, this.destroyingItem);
    }

    private void ensureHasSentCarriedItem() {
        int i = this.minecraft.player.getInventory().selected;
        if (i != this.carriedIndex) {
            this.carriedIndex = i;
            this.connection.send(new ServerboundSetCarriedItemPacket(this.carriedIndex));
        }
    }

    public InteractionResult useItemOn(LocalPlayer p_233733_, InteractionHand p_233734_, BlockHitResult p_233735_) {
        this.ensureHasSentCarriedItem();
        if (!this.minecraft.level.getWorldBorder().isWithinBounds(p_233735_.getBlockPos())) {
            return InteractionResult.FAIL;
        } else {
            MutableObject<InteractionResult> mutableobject = new MutableObject<>();
            this.startPrediction(this.minecraft.level, p_233745_ -> {
                mutableobject.setValue(this.performUseItemOn(p_233733_, p_233734_, p_233735_));
                return new ServerboundUseItemOnPacket(p_233734_, p_233735_, p_233745_);
            });
            return mutableobject.getValue();
        }
    }

    private InteractionResult performUseItemOn(LocalPlayer p_233747_, InteractionHand p_233748_, BlockHitResult p_233749_) {
        BlockPos blockpos = p_233749_.getBlockPos();
        ItemStack itemstack = p_233747_.getItemInHand(p_233748_);
        if (this.localPlayerMode == GameType.SPECTATOR) {
            return InteractionResult.CONSUME;
        } else {
            boolean flag = !p_233747_.getMainHandItem().isEmpty() || !p_233747_.getOffhandItem().isEmpty();
            boolean flag1 = p_233747_.isSecondaryUseActive() && flag;
            if (!flag1) {
                BlockState blockstate = this.minecraft.level.getBlockState(blockpos);
                if (!this.connection.isFeatureEnabled(blockstate.getBlock().requiredFeatures())) {
                    return InteractionResult.FAIL;
                }

                InteractionResult interactionresult = blockstate.useItemOn(
                    p_233747_.getItemInHand(p_233748_), this.minecraft.level, p_233747_, p_233748_, p_233749_
                );
                if (interactionresult.consumesAction()) {
                    return interactionresult;
                }

                if (interactionresult instanceof InteractionResult.TryEmptyHandInteraction && p_233748_ == InteractionHand.MAIN_HAND) {
                    InteractionResult interactionresult1 = blockstate.useWithoutItem(this.minecraft.level, p_233747_, p_233749_);
                    if (interactionresult1.consumesAction()) {
                        return interactionresult1;
                    }
                }
            }

            if (!itemstack.isEmpty() && !p_233747_.getCooldowns().isOnCooldown(itemstack)) {
                UseOnContext useoncontext = new UseOnContext(p_233747_, p_233748_, p_233749_);
                InteractionResult interactionresult2;
                if (this.localPlayerMode.isCreative()) {
                    int i = itemstack.getCount();
                    interactionresult2 = itemstack.useOn(useoncontext);
                    itemstack.setCount(i);
                } else {
                    interactionresult2 = itemstack.useOn(useoncontext);
                }

                return interactionresult2;
            } else {
                return InteractionResult.PASS;
            }
        }
    }

    public InteractionResult useItem(Player p_233722_, InteractionHand p_233723_) {
        if (this.localPlayerMode == GameType.SPECTATOR) {
            return InteractionResult.PASS;
        } else {
            this.ensureHasSentCarriedItem();
            MutableObject<InteractionResult> mutableobject = new MutableObject<>();
            this.startPrediction(
                this.minecraft.level,
                p_357795_ -> {
                    ServerboundUseItemPacket serverbounduseitempacket = new ServerboundUseItemPacket(
                        p_233723_, p_357795_, p_233722_.getYRot(), p_233722_.getXRot()
                    );
                    ItemStack itemstack = p_233722_.getItemInHand(p_233723_);
                    if (p_233722_.getCooldowns().isOnCooldown(itemstack)) {
                        mutableobject.setValue(InteractionResult.PASS);
                        return serverbounduseitempacket;
                    } else {
                        InteractionResult interactionresult = itemstack.use(this.minecraft.level, p_233722_, p_233723_);
                        ItemStack itemstack1;
                        if (interactionresult instanceof InteractionResult.Success interactionresult$success) {
                            itemstack1 = Objects.requireNonNullElseGet(interactionresult$success.heldItemTransformedTo(), () -> p_233722_.getItemInHand(p_233723_));
                        } else {
                            itemstack1 = p_233722_.getItemInHand(p_233723_);
                        }

                        if (itemstack1 != itemstack) {
                            p_233722_.setItemInHand(p_233723_, itemstack1);
                        }

                        mutableobject.setValue(interactionresult);
                        return serverbounduseitempacket;
                    }
                }
            );
            return mutableobject.getValue();
        }
    }

    public LocalPlayer createPlayer(ClientLevel p_105247_, StatsCounter p_105248_, ClientRecipeBook p_105249_) {
        return this.createPlayer(p_105247_, p_105248_, p_105249_, false, false);
    }

    public LocalPlayer createPlayer(ClientLevel p_105251_, StatsCounter p_105252_, ClientRecipeBook p_105253_, boolean p_105254_, boolean p_105255_) {
        return new LocalPlayer(this.minecraft, p_105251_, this.connection, p_105252_, p_105253_, p_105254_, p_105255_);
    }

    public void attack(Player p_105224_, Entity p_105225_) {
        this.ensureHasSentCarriedItem();
        this.connection.send(ServerboundInteractPacket.createAttackPacket(p_105225_, p_105224_.isShiftKeyDown()));
        if (this.localPlayerMode != GameType.SPECTATOR) {
            p_105224_.attack(p_105225_);
            p_105224_.resetAttackStrengthTicker();
        }
    }

    public InteractionResult interact(Player p_105227_, Entity p_105228_, InteractionHand p_105229_) {
        this.ensureHasSentCarriedItem();
        this.connection.send(ServerboundInteractPacket.createInteractionPacket(p_105228_, p_105227_.isShiftKeyDown(), p_105229_));
        return (InteractionResult)(this.localPlayerMode == GameType.SPECTATOR ? InteractionResult.PASS : p_105227_.interactOn(p_105228_, p_105229_));
    }

    public InteractionResult interactAt(Player p_105231_, Entity p_105232_, EntityHitResult p_105233_, InteractionHand p_105234_) {
        this.ensureHasSentCarriedItem();
        Vec3 vec3 = p_105233_.getLocation().subtract(p_105232_.getX(), p_105232_.getY(), p_105232_.getZ());
        this.connection.send(ServerboundInteractPacket.createInteractionPacket(p_105232_, p_105231_.isShiftKeyDown(), p_105234_, vec3));
        return (InteractionResult)(this.localPlayerMode == GameType.SPECTATOR ? InteractionResult.PASS : p_105232_.interactAt(p_105231_, vec3, p_105234_));
    }

    public void handleInventoryMouseClick(int p_171800_, int p_171801_, int p_171802_, ClickType p_171803_, Player p_171804_) {
        AbstractContainerMenu abstractcontainermenu = p_171804_.containerMenu;
        if (p_171800_ != abstractcontainermenu.containerId) {
            LOGGER.warn("Ignoring click in mismatching container. Click in {}, player has {}.", p_171800_, abstractcontainermenu.containerId);
        } else {
            NonNullList<Slot> nonnulllist = abstractcontainermenu.slots;
            int i = nonnulllist.size();
            List<ItemStack> list = Lists.newArrayListWithCapacity(i);

            for (Slot slot : nonnulllist) {
                list.add(slot.getItem().copy());
            }

            abstractcontainermenu.clicked(p_171801_, p_171802_, p_171803_, p_171804_);
            Int2ObjectMap<ItemStack> int2objectmap = new Int2ObjectOpenHashMap<>();

            for (int j = 0; j < i; j++) {
                ItemStack itemstack = list.get(j);
                ItemStack itemstack1 = nonnulllist.get(j).getItem();
                if (!ItemStack.matches(itemstack, itemstack1)) {
                    int2objectmap.put(j, itemstack1.copy());
                }
            }

            this.connection
                .send(
                    new ServerboundContainerClickPacket(
                        p_171800_,
                        abstractcontainermenu.getStateId(),
                        p_171801_,
                        p_171802_,
                        p_171803_,
                        abstractcontainermenu.getCarried().copy(),
                        int2objectmap
                    )
                );
        }
    }

    public void handlePlaceRecipe(int p_105218_, RecipeDisplayId p_365843_, boolean p_105220_) {
        this.connection.send(new ServerboundPlaceRecipePacket(p_105218_, p_365843_, p_105220_));
    }

    public void handleInventoryButtonClick(int p_105209_, int p_105210_) {
        this.connection.send(new ServerboundContainerButtonClickPacket(p_105209_, p_105210_));
    }

    public void handleCreativeModeItemAdd(ItemStack p_105242_, int p_105243_) {
        if (this.localPlayerMode.isCreative() && this.connection.isFeatureEnabled(p_105242_.getItem().requiredFeatures())) {
            this.connection.send(new ServerboundSetCreativeModeSlotPacket(p_105243_, p_105242_));
        }
    }

    public void handleCreativeModeItemDrop(ItemStack p_105240_) {
        boolean flag = this.minecraft.screen instanceof AbstractContainerScreen && !(this.minecraft.screen instanceof CreativeModeInventoryScreen);
        if (this.localPlayerMode.isCreative() && !flag && !p_105240_.isEmpty() && this.connection.isFeatureEnabled(p_105240_.getItem().requiredFeatures())) {
            this.connection.send(new ServerboundSetCreativeModeSlotPacket(-1, p_105240_));
            this.minecraft.player.getDropSpamThrottler().increment();
        }
    }

    public void releaseUsingItem(Player p_105278_) {
        this.ensureHasSentCarriedItem();
        this.connection.send(new ServerboundPlayerActionPacket(ServerboundPlayerActionPacket.Action.RELEASE_USE_ITEM, BlockPos.ZERO, Direction.DOWN));
        p_105278_.releaseUsingItem();
    }

    public boolean hasExperience() {
        return this.localPlayerMode.isSurvival();
    }

    public boolean hasMissTime() {
        return !this.localPlayerMode.isCreative();
    }

    public boolean hasInfiniteItems() {
        return this.localPlayerMode.isCreative();
    }

    public boolean isServerControlledInventory() {
        return this.minecraft.player.isPassenger() && this.minecraft.player.getVehicle() instanceof HasCustomInventoryScreen;
    }

    public boolean isAlwaysFlying() {
        return this.localPlayerMode == GameType.SPECTATOR;
    }

    @Nullable
    public GameType getPreviousPlayerMode() {
        return this.previousLocalPlayerMode;
    }

    public GameType getPlayerMode() {
        return this.localPlayerMode;
    }

    public boolean isDestroying() {
        return this.isDestroying;
    }

    public int getDestroyStage() {
        return this.destroyProgress > 0.0F ? (int)(this.destroyProgress * 10.0F) : -1;
    }

    public void handlePickItemFromBlock(BlockPos p_376249_, boolean p_375534_) {
        this.connection.send(new ServerboundPickItemFromBlockPacket(p_376249_, p_375534_));
    }

    public void handlePickItemFromEntity(Entity p_378506_, boolean p_375481_) {
        this.connection.send(new ServerboundPickItemFromEntityPacket(p_378506_.getId(), p_375481_));
    }

    public void handleSlotStateChanged(int p_312970_, int p_309738_, boolean p_310073_) {
        this.connection.send(new ServerboundContainerSlotStateChangedPacket(p_312970_, p_309738_, p_310073_));
    }
}