199 lines
8.9 KiB
Java
199 lines
8.9 KiB
Java
package net.minecraft.commands.arguments;
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import com.mojang.brigadier.ImmutableStringReader;
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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.Dynamic2CommandExceptionType;
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import com.mojang.brigadier.exceptions.DynamicCommandExceptionType;
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import com.mojang.brigadier.suggestion.Suggestions;
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import com.mojang.brigadier.suggestion.SuggestionsBuilder;
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import com.mojang.serialization.Codec;
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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 java.util.Optional;
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import java.util.concurrent.CompletableFuture;
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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.commands.SharedSuggestionProvider;
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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.SnbtGrammar;
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import net.minecraft.nbt.Tag;
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import net.minecraft.network.chat.Component;
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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.server.dialog.Dialog;
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import net.minecraft.util.parsing.packrat.Atom;
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import net.minecraft.util.parsing.packrat.Dictionary;
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import net.minecraft.util.parsing.packrat.NamedRule;
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import net.minecraft.util.parsing.packrat.Term;
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import net.minecraft.util.parsing.packrat.commands.Grammar;
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import net.minecraft.util.parsing.packrat.commands.ResourceLocationParseRule;
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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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public static final Dynamic2CommandExceptionType ERROR_NO_SUCH_ELEMENT = new Dynamic2CommandExceptionType(
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(object, object2) -> Component.translatableEscape("argument.resource_or_id.no_such_element", object, object2)
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);
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public static final DynamicOps<Tag> OPS = NbtOps.INSTANCE;
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private final HolderLookup.Provider registryLookup;
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private final Optional<? extends HolderLookup.RegistryLookup<T>> elementLookup;
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private final Codec<T> codec;
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private final Grammar<ResourceOrIdArgument.Result<T, Tag>> grammar;
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private final ResourceKey<? extends Registry<T>> registryKey;
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protected ResourceOrIdArgument(CommandBuildContext registryLookup, ResourceKey<? extends Registry<T>> registryKey, Codec<T> codec) {
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this.registryLookup = registryLookup;
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this.elementLookup = registryLookup.lookup(registryKey);
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this.registryKey = registryKey;
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this.codec = codec;
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this.grammar = createGrammar(registryKey, OPS);
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}
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public static <T, O> Grammar<ResourceOrIdArgument.Result<T, O>> createGrammar(ResourceKey<? extends Registry<T>> registryKey, DynamicOps<O> ops) {
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Grammar<O> grammar = SnbtGrammar.createParser(ops);
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Dictionary<StringReader> dictionary = new Dictionary<>();
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Atom<ResourceOrIdArgument.Result<T, O>> atom = Atom.of("result");
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Atom<ResourceLocation> atom2 = Atom.of("id");
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Atom<O> atom3 = Atom.of("value");
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dictionary.put(atom2, ResourceLocationParseRule.INSTANCE);
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dictionary.put(atom3, grammar.top().value());
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NamedRule<StringReader, ResourceOrIdArgument.Result<T, O>> namedRule = dictionary.put(
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atom, Term.alternative(dictionary.named(atom2), dictionary.named(atom3)), scope -> {
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ResourceLocation resourceLocation = scope.get(atom2);
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if (resourceLocation != null) {
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return new ResourceOrIdArgument.ReferenceResult<>(ResourceKey.create(registryKey, resourceLocation));
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} else {
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O object = scope.getOrThrow(atom3);
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return new ResourceOrIdArgument.InlineResult<>(object);
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}
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}
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);
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return new Grammar<>(dictionary, namedRule);
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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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public static ResourceOrIdArgument.DialogArgument dialog(CommandBuildContext context) {
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return new ResourceOrIdArgument.DialogArgument(context);
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}
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public static Holder<Dialog> getDialog(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, this.grammar, OPS);
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}
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@Nullable
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private <O> Holder<T> parse(StringReader reader, Grammar<ResourceOrIdArgument.Result<T, O>> grammar, DynamicOps<O> ops) throws CommandSyntaxException {
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ResourceOrIdArgument.Result<T, O> result = grammar.parseForCommands(reader);
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return this.elementLookup.isEmpty()
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? null
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: result.parse(reader, this.registryLookup, ops, this.codec, (HolderLookup.RegistryLookup<T>)this.elementLookup.get());
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}
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@Override
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public <S> CompletableFuture<Suggestions> listSuggestions(CommandContext<S> commandContext, SuggestionsBuilder suggestionsBuilder) {
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return SharedSuggestionProvider.listSuggestions(commandContext, suggestionsBuilder, this.registryKey, SharedSuggestionProvider.ElementSuggestionType.ELEMENTS);
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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 DialogArgument extends ResourceOrIdArgument<Dialog> {
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protected DialogArgument(CommandBuildContext context) {
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super(context, Registries.DIALOG, Dialog.DIRECT_CODEC);
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}
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}
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public record InlineResult<T, O>(O value) implements ResourceOrIdArgument.Result<T, O> {
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@Override
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public Holder<T> parse(
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ImmutableStringReader reader, HolderLookup.Provider registryLookup, DynamicOps<O> ops, Codec<T> codec, HolderLookup.RegistryLookup<T> elementLookup
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) throws CommandSyntaxException {
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return Holder.direct(
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codec.parse(registryLookup.createSerializationContext(ops), this.value)
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.getOrThrow(string -> ResourceOrIdArgument.ERROR_FAILED_TO_PARSE.createWithContext(reader, string))
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);
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}
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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.ROOT_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.DIRECT_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.DIRECT_CODEC);
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}
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}
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public record ReferenceResult<T, O>(ResourceKey<T> key) implements ResourceOrIdArgument.Result<T, O> {
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@Override
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public Holder<T> parse(
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ImmutableStringReader reader, HolderLookup.Provider registryLookup, DynamicOps<O> ops, Codec<T> codec, HolderLookup.RegistryLookup<T> elementLookup
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) throws CommandSyntaxException {
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return (Holder<T>)elementLookup.get(this.key)
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.orElseThrow(() -> ResourceOrIdArgument.ERROR_NO_SUCH_ELEMENT.createWithContext(reader, this.key.location(), this.key.registry()));
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}
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}
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public sealed interface Result<T, O> permits ResourceOrIdArgument.InlineResult, ResourceOrIdArgument.ReferenceResult {
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Holder<T> parse(
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ImmutableStringReader reader, HolderLookup.Provider registryLookup, DynamicOps<O> ops, Codec<T> codec, HolderLookup.RegistryLookup<T> elementLookup
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) throws CommandSyntaxException;
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}
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}
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