blockstate, more block events, command preprocess event.

Minecraft.Server.FourKit/Event/Block/BlockFromToEvent.cs

@@ -0,0 +1,59 @@
+namespace Minecraft.Server.FourKit.Event.Block;
+
+using Minecraft.Server.FourKit.Block;
+
+/// <summary>
+/// Represents events with a source block and a destination block, currently
+/// only applies to liquid (lava and water) and teleporting dragon eggs.
+///
+/// <para>If a Block From To event is cancelled, the block will not move
+/// (the liquid will not flow).</para>
+/// </summary>
+public class BlockFromToEvent : BlockEvent, Cancellable
+{
+    private readonly Block _to;
+    private readonly BlockFace _face;
+    private bool _cancel;
+
+    internal BlockFromToEvent(Block block, BlockFace face) : base(block)
+    {
+        _face = face;
+        _to = block.getRelative(face);
+        _cancel = false;
+    }
+
+    internal BlockFromToEvent(Block block, Block toBlock) : base(block)
+    {
+        _to = toBlock;
+        _face = BlockFace.SELF;
+        _cancel = false;
+    }
+
+    internal BlockFromToEvent(Block block, Block toBlock, BlockFace face) : base(block)
+    {
+        _to = toBlock;
+        _face = face;
+        _cancel = false;
+    }
+
+    /// <summary>
+    /// Gets the BlockFace that the block is moving to.
+    /// </summary>
+    /// <returns>The BlockFace that the block is moving to.</returns>
+    public BlockFace getFace() => _face;
+
+    /// <summary>
+    /// Convenience method for getting the faced Block.
+    /// </summary>
+    /// <returns>The faced Block.</returns>
+    public Block getToBlock() => _to;
+
+    /// <inheritdoc/>
+    public bool isCancelled() => _cancel;
+
+    /// <inheritdoc/>
+    public void setCancelled(bool cancel)
+    {
+        _cancel = cancel;
+    }
+}