134 lines
5.5 KiB
Java
134 lines
5.5 KiB
Java
package net.minecraft.commands.arguments;
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import com.google.common.annotations.VisibleForTesting;
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import com.mojang.brigadier.StringReader;
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import com.mojang.brigadier.arguments.ArgumentType;
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import com.mojang.brigadier.context.CommandContext;
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import com.mojang.brigadier.exceptions.CommandSyntaxException;
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import com.mojang.brigadier.exceptions.DynamicCommandExceptionType;
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import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
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import com.mojang.serialization.Codec;
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import com.mojang.serialization.Dynamic;
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import com.mojang.serialization.DynamicOps;
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import java.util.Collection;
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import java.util.List;
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import net.minecraft.commands.CommandBuildContext;
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import net.minecraft.commands.CommandSourceStack;
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import net.minecraft.core.Holder;
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import net.minecraft.core.HolderLookup;
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import net.minecraft.core.Registry;
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import net.minecraft.core.registries.Registries;
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import net.minecraft.nbt.NbtOps;
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import net.minecraft.nbt.TagParser;
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import net.minecraft.network.chat.Component;
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import net.minecraft.resources.RegistryOps;
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import net.minecraft.resources.ResourceKey;
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import net.minecraft.resources.ResourceLocation;
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import net.minecraft.world.level.storage.loot.LootTable;
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import net.minecraft.world.level.storage.loot.functions.LootItemFunction;
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import net.minecraft.world.level.storage.loot.functions.LootItemFunctions;
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import net.minecraft.world.level.storage.loot.predicates.LootItemCondition;
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import org.jetbrains.annotations.Nullable;
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public class ResourceOrIdArgument<T> implements ArgumentType<Holder<T>> {
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private static final Collection<String> EXAMPLES = List.of("foo", "foo:bar", "012", "{}", "true");
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public static final DynamicCommandExceptionType ERROR_FAILED_TO_PARSE = new DynamicCommandExceptionType(
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object -> Component.translatableEscape("argument.resource_or_id.failed_to_parse", object)
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);
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private static final SimpleCommandExceptionType ERROR_INVALID = new SimpleCommandExceptionType(Component.translatable("argument.resource_or_id.invalid"));
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private static final TagParser<?> VALUE_PARSER = TagParser.create(NbtOps.INSTANCE);
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private final HolderLookup.Provider registryLookup;
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private final boolean hasRegistry;
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private final Codec<Holder<T>> codec;
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protected ResourceOrIdArgument(CommandBuildContext registryLookup, ResourceKey<Registry<T>> registryKey, Codec<Holder<T>> codec) {
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this.registryLookup = registryLookup;
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this.hasRegistry = registryLookup.lookup(registryKey).isPresent();
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this.codec = codec;
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}
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public static ResourceOrIdArgument.LootTableArgument lootTable(CommandBuildContext context) {
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return new ResourceOrIdArgument.LootTableArgument(context);
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}
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public static Holder<LootTable> getLootTable(CommandContext<CommandSourceStack> context, String name) throws CommandSyntaxException {
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return getResource(context, name);
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}
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public static ResourceOrIdArgument.LootModifierArgument lootModifier(CommandBuildContext context) {
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return new ResourceOrIdArgument.LootModifierArgument(context);
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}
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public static Holder<LootItemFunction> getLootModifier(CommandContext<CommandSourceStack> context, String name) {
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return getResource(context, name);
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}
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public static ResourceOrIdArgument.LootPredicateArgument lootPredicate(CommandBuildContext context) {
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return new ResourceOrIdArgument.LootPredicateArgument(context);
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}
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public static Holder<LootItemCondition> getLootPredicate(CommandContext<CommandSourceStack> context, String name) {
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return getResource(context, name);
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}
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private static <T> Holder<T> getResource(CommandContext<CommandSourceStack> context, String name) {
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return context.getArgument(name, Holder.class);
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}
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@Nullable
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public Holder<T> parse(StringReader reader) throws CommandSyntaxException {
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return this.parse(reader, VALUE_PARSER);
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}
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@Nullable
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private <O> Holder<T> parse(StringReader reader, TagParser<O> parser) throws CommandSyntaxException {
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RegistryOps<O> registryOps = this.registryLookup.createSerializationContext(parser.getOps());
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Dynamic<?> dynamic = parseInlineOrId(registryOps, parser, reader);
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return !this.hasRegistry ? null : this.codec.parse(dynamic).getOrThrow(string -> ERROR_FAILED_TO_PARSE.createWithContext(reader, string));
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}
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@VisibleForTesting
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static <T> Dynamic<T> parseInlineOrId(DynamicOps<T> ops, TagParser<T> tagParser, StringReader reader) throws CommandSyntaxException {
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int i = reader.getCursor();
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T object = tagParser.parseAsArgument(reader);
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if (hasConsumedWholeArg(reader)) {
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return new Dynamic<>(ops, object);
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} else {
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reader.setCursor(i);
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ResourceLocation resourceLocation = ResourceLocation.read(reader);
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if (hasConsumedWholeArg(reader)) {
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return new Dynamic<>(ops, ops.createString(resourceLocation.toString()));
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} else {
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reader.setCursor(i);
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throw ERROR_INVALID.createWithContext(reader);
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}
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}
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}
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private static boolean hasConsumedWholeArg(StringReader reader) {
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return !reader.canRead() || reader.peek() == ' ';
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}
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@Override
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public Collection<String> getExamples() {
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return EXAMPLES;
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}
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public static class LootModifierArgument extends ResourceOrIdArgument<LootItemFunction> {
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protected LootModifierArgument(CommandBuildContext context) {
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super(context, Registries.ITEM_MODIFIER, LootItemFunctions.CODEC);
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}
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}
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public static class LootPredicateArgument extends ResourceOrIdArgument<LootItemCondition> {
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protected LootPredicateArgument(CommandBuildContext context) {
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super(context, Registries.PREDICATE, LootItemCondition.CODEC);
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}
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}
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public static class LootTableArgument extends ResourceOrIdArgument<LootTable> {
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protected LootTableArgument(CommandBuildContext context) {
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super(context, Registries.LOOT_TABLE, LootTable.CODEC);
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}
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}
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}
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