src/game/java/net/minecraft/commands/arguments/StringRepresentableArgument.java

package net.minecraft.commands.arguments;

import com.google.gson.JsonPrimitive;
import com.mojang.brigadier.StringReader;
import com.mojang.brigadier.arguments.ArgumentType;
import com.mojang.brigadier.context.CommandContext;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import com.mojang.brigadier.exceptions.DynamicCommandExceptionType;
import com.mojang.brigadier.suggestion.Suggestions;
import com.mojang.brigadier.suggestion.SuggestionsBuilder;
import com.mojang.serialization.Codec;
import com.mojang.serialization.JsonOps;
import java.util.Arrays;
import java.util.Collection;
import java.util.concurrent.CompletableFuture;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import net.minecraft.commands.SharedSuggestionProvider;
import net.minecraft.network.chat.Component;
import net.minecraft.util.StringRepresentable;

public class StringRepresentableArgument<T extends Enum<T> & StringRepresentable> implements ArgumentType<T> {
    private static final DynamicCommandExceptionType ERROR_INVALID_VALUE = new DynamicCommandExceptionType(
        p_308387_ -> Component.translatableEscape("argument.enum.invalid", p_308387_)
    );
    private final Codec<T> codec;
    private final Supplier<T[]> values;

    protected StringRepresentableArgument(Codec<T> p_234060_, Supplier<T[]> p_234061_) {
        this.codec = p_234060_;
        this.values = p_234061_;
    }

    public T parse(StringReader p_234063_) throws CommandSyntaxException {
        String s = p_234063_.readUnquotedString();
        return this.codec.parse(JsonOps.INSTANCE, new JsonPrimitive(s)).result().orElseThrow(() -> ERROR_INVALID_VALUE.createWithContext(p_234063_, s));
    }

    @Override
    public <S> CompletableFuture<Suggestions> listSuggestions(CommandContext<S> p_234074_, SuggestionsBuilder p_234075_) {
        return SharedSuggestionProvider.suggest(
            Arrays.<Enum>stream((Enum[])this.values.get())
                .map(p_234069_ -> ((StringRepresentable)p_234069_).getSerializedName())
                .map(this::convertId)
                .collect(Collectors.toList()),
            p_234075_
        );
    }

    @Override
    public Collection<String> getExamples() {
        return Arrays.<Enum>stream((Enum[])this.values.get())
            .map(p_234065_ -> ((StringRepresentable)p_234065_).getSerializedName())
            .map(this::convertId)
            .limit(2L)
            .collect(Collectors.toList());
    }

    protected String convertId(String p_275436_) {
        return p_275436_;
    }
}