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There is a newer version: 1.20.40-r1

package cn.nukkit.level.format.updater;

import cn.nukkit.api.PowerNukkitOnly;
import cn.nukkit.api.Since;
import cn.nukkit.block.BlockID;
import cn.nukkit.blockstate.BlockState;
import cn.nukkit.level.format.ChunkSection;

@PowerNukkitOnly
@Since("1.4.0.0-PN")
class OldWoodBarkUpdater implements Updater {
    private final ChunkSection section;
    private final int fromLog;
    private final int increment;

    @PowerNukkitOnly
    @Since("1.4.0.0-PN")
    public OldWoodBarkUpdater(ChunkSection section, int fromLog, int increment) {
        this.section = section;
        this.fromLog = fromLog;
        this.increment = increment;
    }

    @PowerNukkitOnly
    @Override
    public boolean update(int offsetX, int offsetY, int offsetZ, int x, int y, int z, BlockState state) {
        if (state.getBlockId() != fromLog) {
            return false;
        }

        @SuppressWarnings("deprecation")
        int legacyDamage = state.getLegacyDamage();
        if ((legacyDamage & 0b1100) != 0b1100) {
            return false;
        }

        section.setBlockState(x, y, z, BlockState.of(BlockID.WOOD, (legacyDamage & 0b11) + increment));
        return true;
    }
}