Add help information for inventory command (#1170)

* Add help information for inventory command

* Change optional parameter representation

MinecraftClient/Commands/Inventory.cs

@@ -9,7 +9,7 @@ namespace MinecraftClient.Commands
     class Inventory : Command
     {
         public override string CMDName { get { return "inventory"; } }
-        public override string CMDDesc { get { return "inventory <<id>|player|container> <list|close|drop <slot> <1|all>|click <slot> <left|right|middle>> | inventory creativegive <slot> <itemtype> <count>: Interact with inventories"; } }
+        public override string CMDDesc { get { return GetCommandDesc(); } }
 
         public override string Run(McClient handler, string command, Dictionary<string, object> localVars)
         {
@@ -21,26 +21,13 @@ namespace MinecraftClient.Commands
                     try
                     {
                         int inventoryId;
-                        if (args[0].ToLower() == "player")
+                        if (args[0].ToLower() == "creativegive")
-                        {
-                            // player inventory is always ID 0
-                            inventoryId = 0;
-                        }
-                        else if (args[0].ToLower() == "container")
-                        {
-                            List<int> availableIds = handler.GetInventories().Keys.ToList();
-                            availableIds.Remove(0); // remove player inventory ID from list
-                            if (availableIds.Count == 1)
-                                inventoryId = availableIds[0]; // one container, use it
-                            else return "Cannot find container, please retry with explicit ID";
-                        }
-                        else if (args[0].ToLower() == "creativegive")
                         {
                             if (args.Length >= 4)
                             {
                                 int slot = int.Parse(args[1]);
                                 ItemType itemType = ItemType.Stone;
-                                if (Enum.TryParse(args[2], out itemType))
+                                if (Enum.TryParse(args[2], true, out itemType))
                                 {
                                     if (handler.GetGamemode() == 1)
                                     {
@@ -58,6 +45,27 @@ namespace MinecraftClient.Commands
                             }
                             else return CMDDesc;
                         }
+                        else if (args[0].ToLower().StartsWith("p"))
+                        {
+                            // player inventory is always ID 0
+                            inventoryId = 0;
+                        }
+                        else if (args[0].ToLower().StartsWith("c"))
+                        {
+                            List<int> availableIds = handler.GetInventories().Keys.ToList();
+                            availableIds.Remove(0); // remove player inventory ID from list
+                            if (availableIds.Count == 1)
+                                inventoryId = availableIds[0]; // one container, use it
+                            else return "Cannot find container, please retry with explicit ID";
+                        }
+                        else if (args[0].ToLower() == "help")
+                        {
+                            if (args.Length >= 2)
+                            {
+                                return GetSubCommandHelp(args[1]);
+                            }
+                            else return GetHelp();
+                        }
                         else inventoryId = int.Parse(args[0]);
                         string action = args.Length > 1
                             ? args[1].ToLower()
@@ -153,5 +161,55 @@ namespace MinecraftClient.Commands
             }
             else return "Please enable inventoryhandling in config to use this command.";
         }
+
+        #region Methods for commands help
+        private string GetCommandDesc()
+        {
+            return GetBasicUsage() + " Type \"/inventory help\" for more help";
+        }
+
+        private string GetAvailableActions()
+        {
+            return "Available actions: list, close, click, drop.";
+        }
+
+        private string GetBasicUsage()
+        {
+            return "Basic usage: /inventory <player|container|<id>> <action>.";
+        }
+
+        private string GetHelp()
+        {
+            return GetBasicUsage()
+                + "\n " + GetAvailableActions() + " Use \"/inventory help <action>\" for action help."
+                + "\n Creative mode give: " + GetCreativeGiveHelp()
+                + "\n \"player\" and \"container\" can be simplified to \"p\" and \"c\"."
+                + "\n Note that parameters in \"[]\" are optional.";
+        }
+
+        private string GetCreativeGiveHelp()
+        {
+            return "Usage: /inventory creativegive <slot> <itemtype> <count>";
+        }
+
+        private string GetSubCommandHelp(string cmd)
+        {
+            switch (cmd)
+            {
+                case "list":
+                    return "List your inventory. Usage: /inventory <player|container|<id>> list";
+                case "close":
+                    return "Close an opened container. Usage: /inventory <player|container|<id>> close";
+                case "click":
+                    return "Click on an item. Usage: /inventory <player|container|<id>> click <slot> [left|right|middle]. \nDefault is left click";
+                case "drop":
+                    return "Drop an item from inventory. Usage: /inventory <player|container|<id>> drop <slot> [all]. \nAll means drop full stack";
+                case "help":
+                    return GetHelp();
+                default:
+                    return "Unknown action. " + GetAvailableActions();
+            }
+        }
+        #endregion
     }
 }