Implement 1.9->1.8 command block translation #692
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| /* | ||
| * This file is part of ViaRewind - https://github.com/ViaVersion/ViaRewind | ||
| * Copyright (C) 2018-2026 ViaVersion and contributors | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation, either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package com.viaversion.viarewind.protocol.v1_9to1_8.data; | ||
|
|
||
| import com.viaversion.nbt.tag.CompoundTag; | ||
| import com.viaversion.nbt.tag.NumberTag; | ||
| import com.viaversion.nbt.tag.StringTag; | ||
|
|
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| public final class CommandBlockState { | ||
|
|
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| public static final int COMMAND_BLOCK_COMMAND_LIMIT = 32500; | ||
|
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| private static final String IMPULSE = "IMPULSE"; | ||
| private static final String REPEAT = "REPEAT"; | ||
| private static final String CHAIN = "CHAIN"; | ||
| private static final String CONDITIONAL = "CONDITIONAL"; | ||
| private static final String UNCONDITIONAL = "UNCONDITIONAL"; | ||
| private static final String ALWAYS_ACTIVE = "ALWAYSACTIVE"; | ||
| private static final String REDSTONE = "REDSTONE"; | ||
|
|
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| private CommandBlockState() { | ||
| } | ||
|
|
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| public static boolean isCommandBlock(final int blockState) { | ||
| return isImpulse(blockState) || isRepeat(blockState) || isChain(blockState); | ||
| } | ||
|
|
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| public static void decorateCommand(final CompoundTag tag, final int blockState) { | ||
| if (tag == null || !isCommandBlock(blockState)) { | ||
| return; | ||
| } | ||
|
|
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| final StringTag commandTag = tag.getStringTag("Command"); | ||
| if (commandTag == null) { | ||
| return; | ||
| } | ||
|
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| final Mode mode = mode(blockState); | ||
| final boolean conditional = (blockState & 8) != 0; | ||
| final boolean automatic = booleanTag(tag, "auto"); | ||
| if (mode == Mode.REDSTONE && !conditional && !automatic) { | ||
| return; | ||
| } | ||
|
|
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| final String prefix = mode.prefix + ' ' + (conditional ? CONDITIONAL : UNCONDITIONAL) + ' ' + (automatic ? ALWAYS_ACTIVE : REDSTONE) + ' '; | ||
| final String command = commandTag.getValue(); | ||
| if (!parseDecoratedCommand(command).prefixed() && prefix.length() + command.length() <= COMMAND_BLOCK_COMMAND_LIMIT) { | ||
| commandTag.setValue(prefix + command); | ||
| } | ||
| } | ||
|
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| public static ParsedCommand parseDecoratedCommand(final String command) { | ||
| final int first = command.indexOf(' '); | ||
| if (first == -1) { | ||
| return ParsedCommand.defaultState(command); | ||
| } | ||
| final int second = command.indexOf(' ', first + 1); | ||
| if (second == -1) { | ||
| return ParsedCommand.defaultState(command); | ||
| } | ||
| final int third = command.indexOf(' ', second + 1); | ||
| if (third == -1) { | ||
| return ParsedCommand.defaultState(command); | ||
| } | ||
|
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| final Mode mode = Mode.fromPrefix(command.substring(0, first)); | ||
| if (mode == null) { | ||
| return ParsedCommand.defaultState(command); | ||
| } | ||
|
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| final String conditionalToken = command.substring(first + 1, second); | ||
| final boolean conditional; | ||
| if (CONDITIONAL.equalsIgnoreCase(conditionalToken)) { | ||
| conditional = true; | ||
| } else if (UNCONDITIONAL.equalsIgnoreCase(conditionalToken)) { | ||
| conditional = false; | ||
| } else { | ||
| return ParsedCommand.defaultState(command); | ||
| } | ||
|
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| final String automaticToken = command.substring(second + 1, third); | ||
| final boolean automatic; | ||
| if (ALWAYS_ACTIVE.equalsIgnoreCase(automaticToken)) { | ||
| automatic = true; | ||
| } else if (REDSTONE.equalsIgnoreCase(automaticToken)) { | ||
| automatic = false; | ||
| } else { | ||
| return ParsedCommand.defaultState(command); | ||
| } | ||
|
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| return new ParsedCommand(command.substring(third + 1), mode.serverName, conditional, automatic, true); | ||
| } | ||
|
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| private static boolean booleanTag(final CompoundTag tag, final String key) { | ||
| final NumberTag numberTag = tag.getNumberTag(key); | ||
| return numberTag != null && numberTag.asByte() != 0; | ||
| } | ||
|
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| private static Mode mode(final int blockState) { | ||
| if (isRepeat(blockState)) { | ||
| return Mode.AUTO; | ||
| } | ||
| if (isChain(blockState)) { | ||
| return Mode.SEQUENCE; | ||
| } | ||
| return Mode.REDSTONE; | ||
| } | ||
|
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| private static boolean isImpulse(final int blockState) { | ||
| return blockState >= 2192 && blockState <= 2207; | ||
| } | ||
|
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| private static boolean isRepeat(final int blockState) { | ||
| return blockState >= 3360 && blockState <= 3375; | ||
| } | ||
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| private static boolean isChain(final int blockState) { | ||
| return blockState >= 3376 && blockState <= 3391; | ||
| } | ||
|
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| public record ParsedCommand(String command, String mode, boolean conditional, boolean automatic, boolean prefixed) { | ||
|
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| private static ParsedCommand defaultState(final String command) { | ||
| return new ParsedCommand(command, Mode.REDSTONE.serverName, false, false, false); | ||
| } | ||
| } | ||
|
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| private enum Mode { | ||
| REDSTONE(IMPULSE, "REDSTONE"), | ||
| AUTO(REPEAT, "AUTO"), | ||
| SEQUENCE(CHAIN, "SEQUENCE"); | ||
|
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| private final String prefix; | ||
| private final String serverName; | ||
|
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| Mode(final String prefix, final String serverName) { | ||
| this.prefix = prefix; | ||
| this.serverName = serverName; | ||
| } | ||
|
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| private static Mode fromPrefix(final String prefix) { | ||
| for (final Mode mode : values()) { | ||
| if (mode.prefix.equalsIgnoreCase(prefix)) { | ||
| return mode; | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
| } | ||
| } |
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These can just be inlined, the helper methods only exist in rewriter base classes to reduce duplicated code.