BlockRegionModificationEvent.java

package dev.compactmods.machines.test.worldgen;

import net.minecraft.core.BlockPos;
import net.minecraft.world.phys.AABB;
import net.neoforged.bus.api.Event;
import net.neoforged.bus.api.ICancellableEvent;

import java.util.Collection;

/**
 * Notifies listeners of block changes over a large region.
 */
public abstract class BlockRegionModificationEvent extends Event {

    private final AABB boundaries;

    public BlockRegionModificationEvent(AABB boundaries) {
        this.boundaries = boundaries;
    }

    public AABB getBoundaries() {
        return this.boundaries;
    }

    /**
     * Fired on the logical server when multiple blocks in an area are about to change.
     * If cancelled, none of the blocks within boundaries are to be modified.
     */
    public static class Pre extends BlockRegionModificationEvent implements ICancellableEvent {
        public Pre(AABB boundaries) {
            super(boundaries);
        }

        public void disallowChanges(AABB boundaries) {
        }

        public void disallowChanges(Collection<BlockPos> blockPositions) {
        }
    }

    /**
     * Fired on the logical server after a region of blocks have been changed.
     */
    public static class Post extends BlockRegionModificationEvent {

        public Post(AABB boundaries) {
            super(boundaries);
        }
    }
}