BlockStateDeserializerHelper.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\data\bedrock\block\convert;
 
use pocketmine\block\Block;
use pocketmine\block\Button;
use pocketmine\block\Candle;
use pocketmine\block\Crops;
use pocketmine\block\DaylightSensor;
use pocketmine\block\Door;
use pocketmine\block\DoublePlant;
use pocketmine\block\FenceGate;
use pocketmine\block\FloorCoralFan;
use pocketmine\block\FloorSign;
use pocketmine\block\ItemFrame;
use pocketmine\block\Leaves;
use pocketmine\block\Liquid;
use pocketmine\block\RedMushroomBlock;
use pocketmine\block\RedstoneComparator;
use pocketmine\block\RedstoneRepeater;
use pocketmine\block\Sapling;
use pocketmine\block\SimplePressurePlate;
use pocketmine\block\Slab;
use pocketmine\block\Stair;
use pocketmine\block\Stem;
use pocketmine\block\Trapdoor;
use pocketmine\block\utils\CopperMaterial;
use pocketmine\block\utils\CopperOxidation;
use pocketmine\block\utils\SlabType;
use pocketmine\block\Wall;
use pocketmine\block\WallSign;
use pocketmine\block\WeightedPressurePlate;
use pocketmine\block\Wood;
use pocketmine\data\bedrock\block\BlockLegacyMetadata;
use pocketmine\data\bedrock\block\BlockStateDeserializeException;
use pocketmine\data\bedrock\block\BlockStateNames;
use pocketmine\data\bedrock\block\BlockStateNames as StateNames;
use pocketmine\data\bedrock\MushroomBlockTypeIdMap;
use pocketmine\math\Axis;
use pocketmine\math\Facing;
use pocketmine\utils\AssumptionFailedError;
 
final class BlockStateDeserializerHelper{
 
    public static function decodeButton(Button $block, BlockStateReader $in) : Button{
        return $block
            ->setFacing($in->readFacingDirection())
            ->setPressed($in->readBool(BlockStateNames::BUTTON_PRESSED_BIT));
    }
 
    public static function decodeCandle(Candle $block, BlockStateReader $in) : Candle{
        return $block
            ->setCount($in->readBoundedInt(StateNames::CANDLES, 0, 3) + 1)
            ->setLit($in->readBool(StateNames::LIT));
    }
 
    public static function decodeCrops(Crops $block, BlockStateReader $in) : Crops{
        return $block->setAge($in->readBoundedInt(BlockStateNames::GROWTH, 0, 7));
    }
 
    public static function decodeComparator(RedstoneComparator $block, BlockStateReader $in) : RedstoneComparator{
        return $block
            ->setFacing($in->readCardinalHorizontalFacing())
            ->setPowered($in->readBool(BlockStateNames::OUTPUT_LIT_BIT))
            ->setSubtractMode($in->readBool(BlockStateNames::OUTPUT_SUBTRACT_BIT));
    }
 
    public static function decodeCopper(CopperMaterial $block, CopperOxidation $oxidation) : CopperMaterial{
        $block->setOxidation($oxidation);
        $block->setWaxed(false);
        return $block;
    }
 
    public static function decodeWaxedCopper(CopperMaterial $block, CopperOxidation $oxidation) : CopperMaterial{
        $block->setOxidation($oxidation);
        $block->setWaxed(true);
        return $block;
    }
 
    public static function decodeDaylightSensor(DaylightSensor $block, BlockStateReader $in) : DaylightSensor{
        return $block
            ->setOutputSignalStrength($in->readBoundedInt(BlockStateNames::REDSTONE_SIGNAL, 0, 15));
    }
 
    public static function decodeDoor(Door $block, BlockStateReader $in) : Door{
        //TODO: check if these need any special treatment to get the appropriate data to both halves of the door
        return $block
            ->setTop($in->readBool(BlockStateNames::UPPER_BLOCK_BIT))
            //a door facing "east" is actually facing north - thanks mojang
            ->setFacing(Facing::rotateY($in->readCardinalHorizontalFacing(), clockwise: false))
            ->setHingeRight($in->readBool(BlockStateNames::DOOR_HINGE_BIT))
            ->setOpen($in->readBool(BlockStateNames::OPEN_BIT));
    }
 
    public static function decodeDoublePlant(DoublePlant $block, BlockStateReader $in) : DoublePlant{
        return $block
            ->setTop($in->readBool(BlockStateNames::UPPER_BLOCK_BIT));
    }
 
    public static function decodeFenceGate(FenceGate $block, BlockStateReader $in) : FenceGate{
        return $block
            ->setFacing($in->readCardinalHorizontalFacing())
            ->setInWall($in->readBool(BlockStateNames::IN_WALL_BIT))
            ->setOpen($in->readBool(BlockStateNames::OPEN_BIT));
    }
 
    public static function decodeFloorCoralFan(FloorCoralFan $block, BlockStateReader $in) : FloorCoralFan{
        return $block
            ->setAxis(match($in->readBoundedInt(BlockStateNames::CORAL_FAN_DIRECTION, 0, 1)){
                0 => Axis::X,
                1 => Axis::Z,
                default => throw new AssumptionFailedError("readBoundedInt() should have prevented this"),
            });
    }
 
    public static function decodeFloorSign(FloorSign $block, BlockStateReader $in) : FloorSign{
        return $block
            ->setRotation($in->readBoundedInt(BlockStateNames::GROUND_SIGN_DIRECTION, 0, 15));
    }
 
    public static function decodeItemFrame(ItemFrame $block, BlockStateReader $in) : ItemFrame{
        $in->todo(StateNames::ITEM_FRAME_PHOTO_BIT); //TODO: not sure what the point of this is
        return $block
            ->setFacing($in->readFacingDirection())
            ->setHasMap($in->readBool(StateNames::ITEM_FRAME_MAP_BIT));
    }
 
    public static function decodeLeaves(Leaves $block, BlockStateReader $in) : Leaves{
        return $block
            ->setNoDecay($in->readBool(StateNames::PERSISTENT_BIT))
            ->setCheckDecay($in->readBool(StateNames::UPDATE_BIT));
    }
 
    public static function decodeLiquid(Liquid $block, BlockStateReader $in, bool $still) : Liquid{
        $fluidHeightState = $in->readBoundedInt(BlockStateNames::LIQUID_DEPTH, 0, 15);
        return $block
            ->setDecay($fluidHeightState & 0x7)
            ->setFalling(($fluidHeightState & 0x8) !== 0)
            ->setStill($still);
    }
 
    public static function decodeFlowingLiquid(Liquid $block, BlockStateReader $in) : Liquid{
        return self::decodeLiquid($block, $in, false);
    }
 
    public static function decodeStillLiquid(Liquid $block, BlockStateReader $in) : Liquid{
        return self::decodeLiquid($block, $in, true);
    }
 
    public static function decodeLog(Wood $block, bool $stripped, BlockStateReader $in) : Wood{
        return $block
            ->setAxis($in->readPillarAxis())
            ->setStripped($stripped);
    }
 
    public static function decodeMushroomBlock(RedMushroomBlock $block, BlockStateReader $in) : Block{
        switch($type = $in->readBoundedInt(BlockStateNames::HUGE_MUSHROOM_BITS, 0, 15)){
            case BlockLegacyMetadata::MUSHROOM_BLOCK_ALL_STEM:
            case BlockLegacyMetadata::MUSHROOM_BLOCK_STEM: throw new BlockStateDeserializeException("This state does not exist");
            default:
                //invalid types get left as default
                $type = MushroomBlockTypeIdMap::getInstance()->fromId($type);
                return $type !== null ? $block->setMushroomBlockType($type) : $block;
        }
    }
 
    public static function decodeRepeater(RedstoneRepeater $block, BlockStateReader $in) : RedstoneRepeater{
        return $block
            ->setFacing($in->readCardinalHorizontalFacing())
            ->setDelay($in->readBoundedInt(BlockStateNames::REPEATER_DELAY, 0, 3) + 1);
    }
 
    public static function decodeSapling(Sapling $block, BlockStateReader $in) : Sapling{
        return $block
            ->setReady($in->readBool(BlockStateNames::AGE_BIT));
    }
 
    public static function decodeSimplePressurePlate(SimplePressurePlate $block, BlockStateReader $in) : SimplePressurePlate{
        //TODO: not sure what the deal is here ... seems like a mojang bug / artifact of bad implementation?
        //best to keep this separate from weighted plates anyway...
        return $block->setPressed($in->readBoundedInt(BlockStateNames::REDSTONE_SIGNAL, 0, 15) !== 0);
    }
 
    public static function decodeSingleSlab(Slab $block, BlockStateReader $in) : Slab{
        return $block->setSlabType($in->readSlabPosition());
    }
 
    public static function decodeDoubleSlab(Slab $block, BlockStateReader $in) : Slab{
        $in->ignored(StateNames::MC_VERTICAL_HALF);
        return $block->setSlabType(SlabType::DOUBLE);
    }
 
    public static function decodeStairs(Stair $block, BlockStateReader $in) : Stair{
        return $block
            ->setUpsideDown($in->readBool(BlockStateNames::UPSIDE_DOWN_BIT))
            ->setFacing($in->readWeirdoHorizontalFacing());
    }
 
    public static function decodeStem(Stem $block, BlockStateReader $in) : Stem{
        //In PM, we use Facing::UP to indicate that the stem is not attached to a pumpkin/melon, since this makes the
        //most intuitive sense (the stem is pointing at the sky). However, Bedrock uses the DOWN state for this, which
        //is absurd, and I refuse to make our API similarly absurd.
        $facing = $in->readFacingWithoutUp();
        return self::decodeCrops($block, $in)
            ->setFacing($facing === Facing::DOWN ? Facing::UP : $facing);
    }
 
    public static function decodeTrapdoor(Trapdoor $block, BlockStateReader $in) : Trapdoor{
        return $block
            ->setFacing($in->read5MinusHorizontalFacing())
            ->setTop($in->readBool(BlockStateNames::UPSIDE_DOWN_BIT))
            ->setOpen($in->readBool(BlockStateNames::OPEN_BIT));
    }
 
    public static function decodeWall(Wall $block, BlockStateReader $in) : Wall{
        $block->setPost($in->readBool(BlockStateNames::WALL_POST_BIT));
        $block->setConnection(Facing::NORTH, $in->readWallConnectionType(BlockStateNames::WALL_CONNECTION_TYPE_NORTH));
        $block->setConnection(Facing::SOUTH, $in->readWallConnectionType(BlockStateNames::WALL_CONNECTION_TYPE_SOUTH));
        $block->setConnection(Facing::WEST, $in->readWallConnectionType(BlockStateNames::WALL_CONNECTION_TYPE_WEST));
        $block->setConnection(Facing::EAST, $in->readWallConnectionType(BlockStateNames::WALL_CONNECTION_TYPE_EAST));
 
        return $block;
    }
 
    public static function decodeWallSign(WallSign $block, BlockStateReader $in) : WallSign{
        return $block
            ->setFacing($in->readHorizontalFacing());
    }
 
    public static function decodeWeightedPressurePlate(WeightedPressurePlate $block, BlockStateReader $in) : WeightedPressurePlate{
        return $block
            ->setOutputSignalStrength($in->readBoundedInt(BlockStateNames::REDSTONE_SIGNAL, 0, 15));
    }
}