From 75f593e243bb9a9fa516eefde54e7435052099ea Mon Sep 17 00:00:00 2001
From: Ross L <toastymallows@gmail.com>
Date: Sun, 3 May 2015 17:57:33 -0400
Subject: [PATCH] Added support for Trapdoor placement/use

---
 TrueCraft.Core/Logic/Blocks/TrapdoorBlock.cs | 71 +++++++++++++++++++-
 1 file changed, 68 insertions(+), 3 deletions(-)

diff --git a/TrueCraft.Core/Logic/Blocks/TrapdoorBlock.cs b/TrueCraft.Core/Logic/Blocks/TrapdoorBlock.cs
index c8f21f7..e3fe4f1 100644
--- a/TrueCraft.Core/Logic/Blocks/TrapdoorBlock.cs
+++ b/TrueCraft.Core/Logic/Blocks/TrapdoorBlock.cs
@@ -1,15 +1,32 @@
 using System;
 using TrueCraft.API.Logic;
 using TrueCraft.API;
+using TrueCraft.API.World;
+using TrueCraft.API.Networking;
 
 namespace TrueCraft.Core.Logic.Blocks
 {
     public class TrapdoorBlock : BlockProvider, ICraftingRecipe
     {
+        public enum TrapdoorDirection
+        {
+            West = 0x0,
+            East = 0x1,
+            South = 0x2,
+            North = 0x3,
+        }
+
+        [Flags]
+        public enum TrapdoorFlags
+        {
+            Closed = 0x0,
+            Open = 0x4
+        }
+
         public static readonly byte BlockID = 0x60;
-        
+
         public override byte ID { get { return 0x60; } }
-        
+
         public override double BlastResistance { get { return 15; } }
 
         public override double Hardness { get { return 3; } }
@@ -17,7 +34,7 @@ namespace TrueCraft.Core.Logic.Blocks
         public override byte Luminance { get { return 0; } }
 
         public override bool Opaque { get { return false; } }
-        
+
         public override string DisplayName { get { return "Trapdoor"; } }
 
         public override Tuple<int, int> GetTextureMap(byte metadata)
@@ -25,6 +42,54 @@ namespace TrueCraft.Core.Logic.Blocks
             return new Tuple<int, int>(4, 5);
         }
 
+        public override void BlockLeftClicked(BlockDescriptor descriptor, BlockFace face, IWorld world, IRemoteClient user)
+        {
+            BlockRightClicked(descriptor, face, world, user);
+        }
+
+        public override bool BlockRightClicked(BlockDescriptor descriptor, BlockFace face, IWorld world, IRemoteClient user)
+        {
+            // Flip bit back and forth between Open and Closed
+            world.SetMetadata(descriptor.Coordinates, (byte)(descriptor.Metadata ^ (byte)TrapdoorFlags.Open));
+            return false;
+        }
+
+        public override void ItemUsedOnBlock(Coordinates3D coordinates, ItemStack item, BlockFace face, IWorld world, IRemoteClient user)
+        {
+            if (face == BlockFace.PositiveY || face == BlockFace.NegativeY)
+            {
+                // Trapdoors are not placed when the user clicks on the top or bottom of a block
+                return;
+            }
+
+            // NOTE: These directions are rotated by 90 degrees so that the hinge of the trapdoor is placed
+            // where the user had their cursor.
+            switch (face)
+            {
+                case BlockFace.NegativeZ:
+                    item.Metadata = (byte)TrapdoorDirection.West;
+                    break;
+                case BlockFace.PositiveZ:
+                    item.Metadata = (byte)TrapdoorDirection.East;
+                    break;
+                case BlockFace.NegativeX:
+                    item.Metadata = (byte)TrapdoorDirection.South;
+                    break;
+                case BlockFace.PositiveX:
+                    item.Metadata = (byte)TrapdoorDirection.North;
+                    break;
+                default:
+                    return;
+            }
+
+            base.ItemUsedOnBlock(coordinates, item, face, world, user);
+        }
+
+        protected override ItemStack[] GetDrop(BlockDescriptor descriptor)
+        {
+            return new[] { new ItemStack(ID) };
+        }
+
         public ItemStack[,] Pattern
         {
             get