Add the feature to load simple item type information from yaml files

data/itemRegs/packsacks.yaml

@@ -0,0 +1,4 @@
+- id: packsack
+  scene_path: res://prefab/packsacks/packsack.tscn
+  max_stack_value: 1
+  icon_path: res://sprites/Player.png

data/itemRegs/weapons.yaml

@@ -0,0 +1,4 @@
+- id: staff_of_the_undead
+  scene_path: res://prefab/weapons/staffOfTheUndead.tscn
+  icon_path: res://sprites/weapon/staffOfTheUndead.png
+  max_stack_value: 1

locals/Log.csv

@@ -25,4 +25,8 @@ enter_the_room_debug,节点{0}进入房间{1}。,"Node {0} enters room {1}.",ノ
 death_info,生物{0}被{1}击败。,"Creature {0} was defeated by {1}.",生物{0}が{1}によって打ち負かされました。
 loot_list_has_no_entries,ID为{0}的战利品表，没有指定条目。,"Loot list with ID {0}, no entry specified.",ID{0}の戦利品テーブルは、エントリ指定されていません。
 not_within_the_loot_spawn_range,给定的数值{0}没有在战利品{1}的生成范围{2}内。,The given value {0} is not within the spawn range {2} of loot {1}.,与えられた数値{0}は戦利品{1}の生成範囲{2}内にありません。
-loot_data_quantity,有{0}个战利品数据被返回。,{0} loot data was returned.,{0}個の戦利品データが返されます。
+loot_data_quantity,有{0}个战利品数据被返回。,{0} loot data was returned.,{0}個の戦利品データが返されます。
+
+start_item_register_from_file,开始从文件注册物品信息,Start registering item information from files,アイテム情報をファイルから登録開始
+item_register_from_file,从文件{0}中注册物品信息,Registering item information from file {0},ファイル{0}からアイテム情報を登録する
+item_register_find_item_in_file,注册发现的物品{0},Register discovered item {0},見つかったアイテム{0}を登録

scripts/item/ItemTypeManager.cs

@@ -1,28 +1,71 @@
 using System.Collections.Generic;
+using System.Linq;
 
+using ColdMint.scripts.debug;
 using ColdMint.scripts.utils;
 
 using Godot;
 
+using YamlDotNet.Serialization;
+using YamlDotNet.Serialization.NamingConventions;
+
 namespace ColdMint.scripts.item;
 
 public static class ItemTypeManager
 {
+    //Use for yaml deserialization
+    private record struct ItemTypeInfo(string Id, string ScenePath, string IconPath, int MaxStackValue) { }
+
+    /// <summary>
+    /// Register items from yaml file
+    /// </summary>
+    public static void RegisterFromFile()
+    {
+        LogCat.Log("start_item_register_from_file");
+
+        // initialize yaml deserializer
+        var deserializer = new DeserializerBuilder()
+                          .WithNamingConvention(UnderscoredNamingConvention.Instance) // convent snake_case
+                          .Build();
+
+        // initialize file dir
+        string itemRegsDirPath = "res://data/itemRegs/";
+        var itemRegsDir = DirAccess.Open(itemRegsDirPath);
+        if (DirAccess.GetOpenError() is not Error.Ok)
+        {
+            LogCat.LogError("error_when_open_item_regs_dir");
+        }
+
+        // traverse the dir, find files to register
+        foreach (var file in itemRegsDir.GetFiles())
+        {
+            if (file is null) continue;
+            LogCat.LogWithFormat("item_register_from_file", file);
+
+            // read file, parse to an IEnumerable of type infos
+            var yamlFile = FileAccess.Open($"{itemRegsDirPath}/{file}", FileAccess.ModeFlags.Read);
+            var yamlString = yamlFile.GetAsText();
+            var typeInfos = deserializer.Deserialize<IEnumerable<ItemTypeInfo>>(yamlString);
+            yamlFile.Close();
+
+            // traverse type infos and register them.
+            foreach (var typeInfo in typeInfos)
+            {
+                LogCat.LogWithFormat("item_register_find_item_in_file", typeInfo.Id);
+                var scene = ResourceLoader.Load<PackedScene>(typeInfo.ScenePath);
+                var icon = ResourceLoader.Load<Texture2D>(typeInfo.IconPath);
+                var itemType = new ItemType(typeInfo.Id, () => scene.Instantiate<IItem>(), icon, typeInfo.MaxStackValue);
+                Register(itemType);
+            }
+        }
+    }
+
     /// <summary>
     /// Register items statically here
     /// </summary>
     public static void StaticRegister()
     {
-        var staffOfTheUndeadScene = ResourceLoader.Load<PackedScene>("res://prefab/weapons/staffOfTheUndead.tscn");
-        var staffOfTheUndeadIcon = ResourceLoader.Load<Texture2D>("res://sprites/weapon/staffOfTheUndead.png");
-        var staffOfTheUndead =
-            new ItemType("staff_of_the_undead", () => staffOfTheUndeadScene.Instantiate<IItem>(), staffOfTheUndeadIcon, 1);
-        Register(staffOfTheUndead);
-
-        var packsackScene = ResourceLoader.Load<PackedScene>("res://prefab/packsacks/packsack.tscn");
-        var packsackIcon = ResourceLoader.Load<Texture2D>("res://sprites/Player.png");
-        var packsack = new ItemType("packsack", () => packsackScene.Instantiate<IItem>(), packsackIcon, 1);
-        Register(packsack);
+        
     }
 
     private static Dictionary<string, ItemType> Registry { get; } = [];

scripts/loader/uiLoader/MainMenuLoader.cs

@@ -95,8 +95,11 @@ public partial class MainMenuLoader : UiLoaderTemplate
         CampManager.AddCamp(aborigines);
         _gameScene = (PackedScene)GD.Load("res://scenes/game.tscn");
 
-        //Temp: Register ItemType
-        //临时：注册物品类型
+        //Register ItemTypes from file
+        //从文件注册物品类型
+        ItemTypeManager.RegisterFromFile();
+        //Hardcoded ItemTypes Register
+        //硬编码注册物品类型
         ItemTypeManager.StaticRegister();
     }