src/game/java/net/minecraft/commands/arguments/blocks/BlockStateArgument.java

package net.minecraft.commands.arguments.blocks;

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.suggestion.Suggestions;
import com.mojang.brigadier.suggestion.SuggestionsBuilder;
import java.util.Arrays;
import java.util.Collection;
import java.util.concurrent.CompletableFuture;
import net.minecraft.commands.CommandBuildContext;
import net.minecraft.commands.CommandSourceStack;
import net.minecraft.core.HolderLookup;
import net.minecraft.core.registries.Registries;
import net.minecraft.world.level.block.Block;

public class BlockStateArgument implements ArgumentType<BlockInput> {
    private static final Collection<String> EXAMPLES = Arrays.asList("stone", "minecraft:stone", "stone[foo=bar]", "foo{bar=baz}");
    private final HolderLookup<Block> blocks;

    public BlockStateArgument(CommandBuildContext p_234649_) {
        this.blocks = p_234649_.lookupOrThrow(Registries.BLOCK);
    }

    public static BlockStateArgument block(CommandBuildContext p_234651_) {
        return new BlockStateArgument(p_234651_);
    }

    public BlockInput parse(StringReader p_116122_) throws CommandSyntaxException {
        BlockStateParser.BlockResult blockstateparser$blockresult = BlockStateParser.parseForBlock(this.blocks, p_116122_, true);
        return new BlockInput(
            blockstateparser$blockresult.blockState(), blockstateparser$blockresult.properties().keySet(), blockstateparser$blockresult.nbt()
        );
    }

    public static BlockInput getBlock(CommandContext<CommandSourceStack> p_116124_, String p_116125_) {
        return p_116124_.getArgument(p_116125_, BlockInput.class);
    }

    @Override
    public <S> CompletableFuture<Suggestions> listSuggestions(CommandContext<S> p_116128_, SuggestionsBuilder p_116129_) {
        return BlockStateParser.fillSuggestions(this.blocks, p_116129_, false, true);
    }

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