src/game/java/net/minecraft/server/ReloadableServerResources.java

package net.minecraft.server;

import com.mojang.logging.LogUtils;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Executor;
import net.minecraft.commands.CommandBuildContext;
import net.minecraft.commands.Commands;
import net.minecraft.core.HolderLookup;
import net.minecraft.core.LayeredRegistryAccess;
import net.minecraft.core.Registry;
import net.minecraft.server.packs.resources.PreparableReloadListener;
import net.minecraft.server.packs.resources.ResourceManager;
import net.minecraft.server.packs.resources.SimpleReloadInstance;
import net.minecraft.util.Unit;
import net.minecraft.world.flag.FeatureFlagSet;
import net.minecraft.world.item.crafting.RecipeManager;
import org.slf4j.Logger;

public class ReloadableServerResources {
    private static final Logger LOGGER = LogUtils.getLogger();
    private static final CompletableFuture<Unit> DATA_RELOAD_INITIAL_TASK = CompletableFuture.completedFuture(Unit.INSTANCE);
    private final ReloadableServerRegistries.Holder fullRegistryHolder;
    private final Commands commands;
    private final RecipeManager recipes;
    private final ServerAdvancementManager advancements;
    private final ServerFunctionLibrary functionLibrary;
    private final List<Registry.PendingTags<?>> postponedTags;

    private ReloadableServerResources(
        LayeredRegistryAccess<RegistryLayer> p_368059_,
        HolderLookup.Provider p_363207_,
        FeatureFlagSet p_250695_,
        Commands.CommandSelection p_206858_,
        List<Registry.PendingTags<?>> p_364269_,
        int p_206859_
    ) {
        this.fullRegistryHolder = new ReloadableServerRegistries.Holder(p_368059_.compositeAccess());
        this.postponedTags = p_364269_;
        this.recipes = new RecipeManager(p_363207_);
        this.commands = new Commands(p_206858_, CommandBuildContext.simple(p_363207_, p_250695_));
        this.advancements = new ServerAdvancementManager(p_363207_);
        this.functionLibrary = new ServerFunctionLibrary(p_206859_, this.commands.getDispatcher());
    }

    public ServerFunctionLibrary getFunctionLibrary() {
        return this.functionLibrary;
    }

    public ReloadableServerRegistries.Holder fullRegistries() {
        return this.fullRegistryHolder;
    }

    public RecipeManager getRecipeManager() {
        return this.recipes;
    }

    public Commands getCommands() {
        return this.commands;
    }

    public ServerAdvancementManager getAdvancements() {
        return this.advancements;
    }

    public List<PreparableReloadListener> listeners() {
        return List.of(this.recipes, this.functionLibrary, this.advancements);
    }

    public static CompletableFuture<ReloadableServerResources> loadResources(
        ResourceManager p_248588_,
        LayeredRegistryAccess<RegistryLayer> p_330376_,
        List<Registry.PendingTags<?>> p_366334_,
        FeatureFlagSet p_250212_,
        Commands.CommandSelection p_249301_,
        int p_251126_,
        Executor p_249136_,
        Executor p_249601_
    ) {
        return ReloadableServerRegistries.reload(p_330376_, p_366334_, p_248588_, p_249136_)
            .thenCompose(
                p_358539_ -> {
                    ReloadableServerResources reloadableserverresources = new ReloadableServerResources(
                        p_358539_.layers(), p_358539_.lookupWithUpdatedTags(), p_250212_, p_249301_, p_366334_, p_251126_
                    );
                    return SimpleReloadInstance.create(
                            p_248588_, reloadableserverresources.listeners(), p_249136_, p_249601_, DATA_RELOAD_INITIAL_TASK, LOGGER.isDebugEnabled()
                        )
                        .done()
                        .thenApply(p_214306_ -> reloadableserverresources);
                }
            );
    }

    public void updateStaticRegistryTags() {
        this.postponedTags.forEach(Registry.PendingTags::apply);
    }
}