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

package net.minecraft.commands.arguments;

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 java.util.Arrays;
import java.util.Collection;
import java.util.concurrent.CompletableFuture;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import net.minecraft.commands.CommandSourceStack;
import net.minecraft.commands.SharedSuggestionProvider;
import net.minecraft.network.chat.Component;
import net.minecraft.world.level.GameType;

public class GameModeArgument implements ArgumentType<GameType> {
    private static final Collection<String> EXAMPLES = Stream.of(GameType.SURVIVAL, GameType.CREATIVE).map(GameType::getName).collect(Collectors.toList());
    private static final GameType[] VALUES = GameType.values();
    private static final DynamicCommandExceptionType ERROR_INVALID = new DynamicCommandExceptionType(
        p_308349_ -> Component.translatableEscape("argument.gamemode.invalid", p_308349_)
    );

    public GameType parse(StringReader p_260111_) throws CommandSyntaxException {
        String s = p_260111_.readUnquotedString();
        GameType gametype = GameType.byName(s, null);
        if (gametype == null) {
            throw ERROR_INVALID.createWithContext(p_260111_, s);
        } else {
            return gametype;
        }
    }

    @Override
    public <S> CompletableFuture<Suggestions> listSuggestions(CommandContext<S> p_259767_, SuggestionsBuilder p_259515_) {
        return p_259767_.getSource() instanceof SharedSuggestionProvider
            ? SharedSuggestionProvider.suggest(Arrays.stream(VALUES).map(GameType::getName), p_259515_)
            : Suggestions.empty();
    }

    @Override
    public Collection<String> getExamples() {
        return EXAMPLES;
    }

    public static GameModeArgument gameMode() {
        return new GameModeArgument();
    }

    public static GameType getGameMode(CommandContext<CommandSourceStack> p_259927_, String p_260246_) throws CommandSyntaxException {
        return p_259927_.getArgument(p_260246_, GameType.class);
    }
}