Added more util functions

Barotrauma/BarotraumaShared/Lua/DefaultLib/Utils/Util.lua

@@ -0,0 +1,38 @@
+Util = {}
+
+local itemDictionary = {}
+
+local function AddItem(item)
+    local id = item.Prefab.Identifier.Value
+    if itemDictionary[id] == nil then
+        itemDictionary[id] = {}
+    end
+
+    table.insert(itemDictionary[id], item)
+end
+
+Hook.Add("item.created", "luaSetup.util.itemDictionary", function (item)
+    AddItem(item)
+end)
+
+Hook.Add("roundEnd", "luaSetup.util.itemDictionary", function (item)
+    itemDictionary = {}
+end)
+
+for _, item in pairs(Item.ItemList) do
+    AddItem(item)
+end
+
+Util.GetItemsById = function(id)
+    return itemDictionary[id]
+end
+
+Util.FindClientCharacter = function(character)
+    if CLIENT and Game.IsSingleplayer then return nil end
+
+    for _, client in pairs(Client.ClientList) do
+        if client.Character == character then
+            return client
+        end
+    end
+end