Sign.php

<?php
 
/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
 */
 
declare(strict_types=1);
 
namespace pocketmine\block\tile;
 
use pocketmine\block\utils\SignText;
use pocketmine\color\Color;
use pocketmine\math\Vector3;
use pocketmine\nbt\tag\ByteTag;
use pocketmine\nbt\tag\CompoundTag;
use pocketmine\nbt\tag\IntTag;
use pocketmine\nbt\tag\StringTag;
use pocketmine\utils\Binary;
use pocketmine\world\World;
use function array_pad;
use function array_slice;
use function explode;
use function implode;
use function mb_scrub;
use function sprintf;
 
class Sign extends Spawnable{
    public const TAG_TEXT_BLOB = "Text";
    public const TAG_TEXT_LINE = "Text%d"; //sprintf()able
    public const TAG_TEXT_COLOR = "SignTextColor";
    public const TAG_GLOWING_TEXT = "IgnoreLighting";
    public const TAG_PERSIST_FORMATTING = "PersistFormatting"; //TAG_Byte
    public const TAG_LEGACY_BUG_RESOLVE = "TextIgnoreLegacyBugResolved";
 
    public const TAG_FRONT_TEXT = "FrontText"; //TAG_Compound
    public const TAG_BACK_TEXT = "BackText"; //TAG_Compound
    public const TAG_WAXED = "IsWaxed"; //TAG_Byte
    public const TAG_LOCKED_FOR_EDITING_BY = "LockedForEditingBy"; //TAG_Long
 
    public static function fixTextBlob(string $blob) : array{
        return array_slice(array_pad(explode("\n", $blob, limit: 5), 4, ""), 0, 4);
    }
 
    protected SignText $text;
    private bool $waxed = false;
 
    protected ?int $editorEntityRuntimeId = null;
 
    public function __construct(World $world, Vector3 $pos){
        $this->text = new SignText();
        parent::__construct($world, $pos);
    }
 
    private function readTextTag(CompoundTag $nbt, bool $lightingBugResolved) : void{
        $baseColor = new Color(0, 0, 0);
        $glowingText = false;
        if(($baseColorTag = $nbt->getTag(self::TAG_TEXT_COLOR)) instanceof IntTag){
            $baseColor = Color::fromARGB(Binary::unsignInt($baseColorTag->getValue()));
        }
        if($lightingBugResolved && ($glowingTextTag = $nbt->getTag(self::TAG_GLOWING_TEXT)) instanceof ByteTag){
            //both of these must be 1 - if only one is set, it's a leftover from 1.16.210 experimental features
            //see https://bugs.mojang.com/browse/MCPE-117835
            $glowingText = $glowingTextTag->getValue() !== 0;
        }
        $this->text = SignText::fromBlob(mb_scrub($nbt->getString(self::TAG_TEXT_BLOB), 'UTF-8'), $baseColor, $glowingText);
    }
 
    public function readSaveData(CompoundTag $nbt) : void{
        $frontTextTag = $nbt->getTag(self::TAG_FRONT_TEXT);
        if($frontTextTag instanceof CompoundTag){
            $this->readTextTag($frontTextTag, true);
        }elseif($nbt->getTag(self::TAG_TEXT_BLOB) instanceof StringTag){ //MCPE 1.2 save format
            $lightingBugResolved = false;
            if(($lightingBugResolvedTag = $nbt->getTag(self::TAG_LEGACY_BUG_RESOLVE)) instanceof ByteTag){
                $lightingBugResolved = $lightingBugResolvedTag->getValue() !== 0;
            }
            $this->readTextTag($nbt, $lightingBugResolved);
        }else{
            $text = [];
            for($i = 0; $i < SignText::LINE_COUNT; ++$i){
                $textKey = sprintf(self::TAG_TEXT_LINE, $i + 1);
                if(($lineTag = $nbt->getTag($textKey)) instanceof StringTag){
                    $text[$i] = mb_scrub($lineTag->getValue(), 'UTF-8');
                }
            }
            $this->text = new SignText($text);
        }
        $this->waxed = $nbt->getByte(self::TAG_WAXED, 0) !== 0;
    }
 
    protected function writeSaveData(CompoundTag $nbt) : void{
        $nbt->setTag(self::TAG_FRONT_TEXT, CompoundTag::create()
            ->setString(self::TAG_TEXT_BLOB, implode("\n", $this->text->getLines()))
            ->setInt(self::TAG_TEXT_COLOR, Binary::signInt($this->text->getBaseColor()->toARGB()))
            ->setByte(self::TAG_GLOWING_TEXT, $this->text->isGlowing() ? 1 : 0)
            ->setByte(self::TAG_PERSIST_FORMATTING, 1)
        );
        $nbt->setTag(self::TAG_BACK_TEXT, CompoundTag::create()
            ->setString(self::TAG_TEXT_BLOB, "")
            ->setInt(self::TAG_TEXT_COLOR, Binary::signInt(0xff_00_00_00))
            ->setByte(self::TAG_GLOWING_TEXT, 0)
            ->setByte(self::TAG_PERSIST_FORMATTING, 1)
        );
 
        $nbt->setByte(self::TAG_WAXED, $this->waxed ? 1 : 0);
    }
 
    public function getText() : SignText{
        return $this->text;
    }
 
    public function setText(SignText $text) : void{
        $this->text = $text;
    }
 
    public function isWaxed() : bool{ return $this->waxed; }
 
    public function setWaxed(bool $waxed) : void{ $this->waxed = $waxed; }
 
    public function getEditorEntityRuntimeId() : ?int{ return $this->editorEntityRuntimeId; }
 
    public function setEditorEntityRuntimeId(?int $editorEntityRuntimeId) : void{
        $this->editorEntityRuntimeId = $editorEntityRuntimeId;
    }
 
    protected function addAdditionalSpawnData(CompoundTag $nbt) : void{
        $nbt->setTag(self::TAG_FRONT_TEXT, CompoundTag::create()
            ->setString(self::TAG_TEXT_BLOB, implode("\n", $this->text->getLines()))
            ->setInt(self::TAG_TEXT_COLOR, Binary::signInt($this->text->getBaseColor()->toARGB()))
            ->setByte(self::TAG_GLOWING_TEXT, $this->text->isGlowing() ? 1 : 0)
            ->setByte(self::TAG_PERSIST_FORMATTING, 1) //TODO: not sure what this is used for
        );
        //TODO: this is not yet used by the server, but needed to rollback any client-side changes to the back text
        $nbt->setTag(self::TAG_BACK_TEXT, CompoundTag::create()
            ->setString(self::TAG_TEXT_BLOB, "")
            ->setInt(self::TAG_TEXT_COLOR, Binary::signInt(0xff_00_00_00))
            ->setByte(self::TAG_GLOWING_TEXT, 0)
            ->setByte(self::TAG_PERSIST_FORMATTING, 1)
        );
        $nbt->setByte(self::TAG_WAXED, $this->waxed ? 1 : 0);
        $nbt->setLong(self::TAG_LOCKED_FOR_EDITING_BY, $this->editorEntityRuntimeId ?? -1);
    }
}