From e93f03bd4e60aebf33f70acf9e462ab283385e37 Mon Sep 17 00:00:00 2001
From: ReinforceZwei <39955851+ReinforceZwei@users.noreply.github.com>
Date: Wed, 1 Apr 2020 18:28:00 +0800
Subject: [PATCH] Add auto repsawn if player was dead

---
 MinecraftClient/McTcpClient.cs                | 23 +++++++++++++++++++
 .../Protocol/Handlers/PacketIncomingType.cs   |  1 +
 .../Protocol/Handlers/Protocol18.cs           |  7 ++++++
 .../Handlers/Protocol18PacketTypes.cs         |  1 +
 .../Protocol/IMinecraftComHandler.cs          |  2 ++
 MinecraftClient/Settings.cs                   |  3 +++
 6 files changed, 37 insertions(+)

diff --git a/MinecraftClient/McTcpClient.cs b/MinecraftClient/McTcpClient.cs
index 0aabe342..f4596f5f 100644
--- a/MinecraftClient/McTcpClient.cs
+++ b/MinecraftClient/McTcpClient.cs
@@ -11,6 +11,7 @@ using MinecraftClient.Proxy;
 using MinecraftClient.Protocol.Handlers.Forge;
 using MinecraftClient.Mapping;
 using MinecraftClient.Inventory;
+using System.Threading.Tasks;
 
 namespace MinecraftClient
 {
@@ -1380,5 +1381,27 @@ namespace MinecraftClient
                 return false;
             }
         }
+
+        /// <summary>
+        /// Called when client player's health changed, e.g. getting attack
+        /// </summary>
+        /// <param name="health">Player current health</param>
+        public void OnUpdateHealth(float health)
+        {
+            if (Settings.AutoRespawn)
+            {
+                if (health <= 0)
+                {
+                    ConsoleIO.WriteLine("Client player dead.");
+                    ConsoleIO.WriteLine("Respawn after 1 second...");
+                    Task.Factory.StartNew(delegate
+                    {
+                    // wait before respawn
+                    Thread.Sleep(1000);
+                        SendRespawnPacket();
+                    });
+                }
+            }
+        }
     }
 }
diff --git a/MinecraftClient/Protocol/Handlers/PacketIncomingType.cs b/MinecraftClient/Protocol/Handlers/PacketIncomingType.cs
index 115958d3..aaecc466 100644
--- a/MinecraftClient/Protocol/Handlers/PacketIncomingType.cs
+++ b/MinecraftClient/Protocol/Handlers/PacketIncomingType.cs
@@ -41,6 +41,7 @@ namespace MinecraftClient.Protocol.Handlers
         TimeUpdate,
         EntityTeleport,
         EntityStatus,
+        UpdateHealth,
         UnknownPacket
     }
 }
diff --git a/MinecraftClient/Protocol/Handlers/Protocol18.cs b/MinecraftClient/Protocol/Handlers/Protocol18.cs
index 6800769f..8ba05ea6 100644
--- a/MinecraftClient/Protocol/Handlers/Protocol18.cs
+++ b/MinecraftClient/Protocol/Handlers/Protocol18.cs
@@ -725,6 +725,13 @@ namespace MinecraftClient.Protocol.Handlers
                             handler.OnEntityTeleport(EntityID, X, Y, Z, OnGround);
                         }
                         break;
+                    case PacketIncomingType.UpdateHealth:
+                        float health = dataTypes.ReadNextFloat(packetData);
+                        // don't need them
+                        dataTypes.ReadNextVarInt(packetData);
+                        dataTypes.ReadNextFloat(packetData);
+                        handler.OnUpdateHealth(health);
+                        break;
                     default:
                         return false; //Ignored packet
                 }
diff --git a/MinecraftClient/Protocol/Handlers/Protocol18PacketTypes.cs b/MinecraftClient/Protocol/Handlers/Protocol18PacketTypes.cs
index 032bce34..210da952 100644
--- a/MinecraftClient/Protocol/Handlers/Protocol18PacketTypes.cs
+++ b/MinecraftClient/Protocol/Handlers/Protocol18PacketTypes.cs
@@ -277,6 +277,7 @@ namespace MinecraftClient.Protocol.Handlers
                     case 0x59: return PacketIncomingType.EntityProperties;
                     case 0x57: return PacketIncomingType.EntityTeleport;
                     case 0x1C: return PacketIncomingType.EntityStatus;
+                    case 0x49: return PacketIncomingType.UpdateHealth; // TODO: Add backwards support for this packet
                     default: return PacketIncomingType.UnknownPacket;
                 }
             }
diff --git a/MinecraftClient/Protocol/IMinecraftComHandler.cs b/MinecraftClient/Protocol/IMinecraftComHandler.cs
index db7f5a02..43baa9c6 100644
--- a/MinecraftClient/Protocol/IMinecraftComHandler.cs
+++ b/MinecraftClient/Protocol/IMinecraftComHandler.cs
@@ -212,6 +212,8 @@ namespace MinecraftClient.Protocol
         /// <param name="item">Item (may be null for empty slot)</param>
         void OnSetSlot(byte inventoryID, short slotID, Item item);
 
+        void OnUpdateHealth(float health);
+
         /// <summary>
         /// Called when the Player entity ID has been received from the server
         /// </summary>
diff --git a/MinecraftClient/Settings.cs b/MinecraftClient/Settings.cs
index b693c881..0706cf55 100644
--- a/MinecraftClient/Settings.cs
+++ b/MinecraftClient/Settings.cs
@@ -96,6 +96,7 @@ namespace MinecraftClient
         public static bool ResolveSrvRecords = true;
         public static bool ResolveSrvRecordsShortTimeout = true;
         public static bool EntityHandling = false;
+        public static bool AutoRespawn = false;
 
         //AntiAFK Settings
         public static bool AntiAFK_Enabled = false;
@@ -240,6 +241,7 @@ namespace MinecraftClient
                                                 case "botmessagedelay": botMessageDelay = TimeSpan.FromSeconds(str2int(argValue)); break;
                                                 case "debugmessages": DebugMessages = str2bool(argValue); break;
                                                 case "enableentityhandling": EntityHandling = str2bool(argValue); break;
+                                                case "autorespawn": AutoRespawn = str2bool(argValue); break;
 
                                                 case "botowners":
                                                     Bots_Owners.Clear();
@@ -583,6 +585,7 @@ namespace MinecraftClient
                 + "scriptcache=true                   # Cache compiled scripts for faster load on low-end devices\r\n"
                 + "timestamps=false                   # Prepend timestamps to chat messages\r\n"
                 + "enableentityhandling=false         # Toggle entities handling\r\n"
+                + "autorespawn=false                  # Toggle auto respawn if client player was dead (make sure your spawn point is safe)\r\n"
                 + "\r\n"
                 + "[AppVars]\r\n"
                 + "# yourvar=yourvalue\r\n"