minecraft-src/net/minecraft/world/level/block/entity/trialspawner/TrialSpawnerConfig.java

package net.minecraft.world.level.block.entity.trialspawner;

import com.mojang.serialization.Codec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import java.util.Optional;
import net.minecraft.core.Holder;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.core.registries.Registries;
import net.minecraft.nbt.CompoundTag;
import net.minecraft.resources.RegistryFileCodec;
import net.minecraft.resources.ResourceKey;
import net.minecraft.util.random.WeightedList;
import net.minecraft.world.entity.EntityType;
import net.minecraft.world.level.SpawnData;
import net.minecraft.world.level.storage.loot.BuiltInLootTables;
import net.minecraft.world.level.storage.loot.LootTable;

public record TrialSpawnerConfig(
	int spawnRange,
	float totalMobs,
	float simultaneousMobs,
	float totalMobsAddedPerPlayer,
	float simultaneousMobsAddedPerPlayer,
	int ticksBetweenSpawn,
	WeightedList<SpawnData> spawnPotentialsDefinition,
	WeightedList<ResourceKey<LootTable>> lootTablesToEject,
	ResourceKey<LootTable> itemsToDropWhenOminous
) {
	public static final TrialSpawnerConfig DEFAULT = builder().build();
	public static final Codec<TrialSpawnerConfig> DIRECT_CODEC = RecordCodecBuilder.create(
		instance -> instance.group(
				Codec.intRange(1, 128).optionalFieldOf("spawn_range", DEFAULT.spawnRange).forGetter(TrialSpawnerConfig::spawnRange),
				Codec.floatRange(0.0F, Float.MAX_VALUE).optionalFieldOf("total_mobs", DEFAULT.totalMobs).forGetter(TrialSpawnerConfig::totalMobs),
				Codec.floatRange(0.0F, Float.MAX_VALUE).optionalFieldOf("simultaneous_mobs", DEFAULT.simultaneousMobs).forGetter(TrialSpawnerConfig::simultaneousMobs),
				Codec.floatRange(0.0F, Float.MAX_VALUE)
					.optionalFieldOf("total_mobs_added_per_player", DEFAULT.totalMobsAddedPerPlayer)
					.forGetter(TrialSpawnerConfig::totalMobsAddedPerPlayer),
				Codec.floatRange(0.0F, Float.MAX_VALUE)
					.optionalFieldOf("simultaneous_mobs_added_per_player", DEFAULT.simultaneousMobsAddedPerPlayer)
					.forGetter(TrialSpawnerConfig::simultaneousMobsAddedPerPlayer),
				Codec.intRange(0, Integer.MAX_VALUE).optionalFieldOf("ticks_between_spawn", DEFAULT.ticksBetweenSpawn).forGetter(TrialSpawnerConfig::ticksBetweenSpawn),
				SpawnData.LIST_CODEC.optionalFieldOf("spawn_potentials", WeightedList.of()).forGetter(TrialSpawnerConfig::spawnPotentialsDefinition),
				WeightedList.codec(LootTable.KEY_CODEC).optionalFieldOf("loot_tables_to_eject", DEFAULT.lootTablesToEject).forGetter(TrialSpawnerConfig::lootTablesToEject),
				LootTable.KEY_CODEC.optionalFieldOf("items_to_drop_when_ominous", DEFAULT.itemsToDropWhenOminous).forGetter(TrialSpawnerConfig::itemsToDropWhenOminous)
			)
			.apply(instance, TrialSpawnerConfig::new)
	);
	public static final Codec<Holder<TrialSpawnerConfig>> CODEC = RegistryFileCodec.create(Registries.TRIAL_SPAWNER_CONFIG, DIRECT_CODEC);

	public int calculateTargetTotalMobs(int players) {
		return (int)Math.floor(this.totalMobs + this.totalMobsAddedPerPlayer * players);
	}

	public int calculateTargetSimultaneousMobs(int players) {
		return (int)Math.floor(this.simultaneousMobs + this.simultaneousMobsAddedPerPlayer * players);
	}

	public long ticksBetweenItemSpawners() {
		return 160L;
	}

	public static TrialSpawnerConfig.Builder builder() {
		return new TrialSpawnerConfig.Builder();
	}

	public TrialSpawnerConfig withSpawning(EntityType<?> entityType) {
		CompoundTag compoundTag = new CompoundTag();
		compoundTag.putString("id", BuiltInRegistries.ENTITY_TYPE.getKey(entityType).toString());
		SpawnData spawnData = new SpawnData(compoundTag, Optional.empty(), Optional.empty());
		return new TrialSpawnerConfig(
			this.spawnRange,
			this.totalMobs,
			this.simultaneousMobs,
			this.totalMobsAddedPerPlayer,
			this.simultaneousMobsAddedPerPlayer,
			this.ticksBetweenSpawn,
			WeightedList.of(spawnData),
			this.lootTablesToEject,
			this.itemsToDropWhenOminous
		);
	}

	public static class Builder {
		private int spawnRange = 4;
		private float totalMobs = 6.0F;
		private float simultaneousMobs = 2.0F;
		private float totalMobsAddedPerPlayer = 2.0F;
		private float simultaneousMobsAddedPerPlayer = 1.0F;
		private int ticksBetweenSpawn = 40;
		private WeightedList<SpawnData> spawnPotentialsDefinition = WeightedList.of();
		private WeightedList<ResourceKey<LootTable>> lootTablesToEject = WeightedList.<ResourceKey<LootTable>>builder()
			.add(BuiltInLootTables.SPAWNER_TRIAL_CHAMBER_CONSUMABLES)
			.add(BuiltInLootTables.SPAWNER_TRIAL_CHAMBER_KEY)
			.build();
		private ResourceKey<LootTable> itemsToDropWhenOminous = BuiltInLootTables.SPAWNER_TRIAL_ITEMS_TO_DROP_WHEN_OMINOUS;

		public TrialSpawnerConfig.Builder spawnRange(int spawnRange) {
			this.spawnRange = spawnRange;
			return this;
		}

		public TrialSpawnerConfig.Builder totalMobs(float totalMobs) {
			this.totalMobs = totalMobs;
			return this;
		}

		public TrialSpawnerConfig.Builder simultaneousMobs(float simultaneousMobs) {
			this.simultaneousMobs = simultaneousMobs;
			return this;
		}

		public TrialSpawnerConfig.Builder totalMobsAddedPerPlayer(float totalMobsAddedPerPlayer) {
			this.totalMobsAddedPerPlayer = totalMobsAddedPerPlayer;
			return this;
		}

		public TrialSpawnerConfig.Builder simultaneousMobsAddedPerPlayer(float simultaneousMobsAddedPerPlayer) {
			this.simultaneousMobsAddedPerPlayer = simultaneousMobsAddedPerPlayer;
			return this;
		}

		public TrialSpawnerConfig.Builder ticksBetweenSpawn(int ticksBetweenSpawn) {
			this.ticksBetweenSpawn = ticksBetweenSpawn;
			return this;
		}

		public TrialSpawnerConfig.Builder spawnPotentialsDefinition(WeightedList<SpawnData> spawnPotentialsDefinition) {
			this.spawnPotentialsDefinition = spawnPotentialsDefinition;
			return this;
		}

		public TrialSpawnerConfig.Builder lootTablesToEject(WeightedList<ResourceKey<LootTable>> lootTablesToEject) {
			this.lootTablesToEject = lootTablesToEject;
			return this;
		}

		public TrialSpawnerConfig.Builder itemsToDropWhenOminous(ResourceKey<LootTable> itemsToDropWhenOminous) {
			this.itemsToDropWhenOminous = itemsToDropWhenOminous;
			return this;
		}

		public TrialSpawnerConfig build() {
			return new TrialSpawnerConfig(
				this.spawnRange,
				this.totalMobs,
				this.simultaneousMobs,
				this.totalMobsAddedPerPlayer,
				this.simultaneousMobsAddedPerPlayer,
				this.ticksBetweenSpawn,
				this.spawnPotentialsDefinition,
				this.lootTablesToEject,
				this.itemsToDropWhenOminous
			);
		}
	}
}