inventory.lua

local Inventory = {}
local mobj = require("System/Libraries/ModObject")
local Signal = require("System/Classes/Signal")


Inventory.ItemAdded = Signal.New()
Inventory.ItemRemoved = Signal.New()

function Inventory.Create(itemsTable)
  local inv = Inventory:Init()
  inv.Items = itemsTable or {}
  return inv
end


function Inventory:UseItem(item)
  item:Use()
  self:RemoveItem(slot)
end


--Adds item "item" in slot "slot"; if "slot" is nil, then adds the item in slot "#self.Items + 1"
function Inventory:AddItem(item, slot, cb)
  self.Items[slot or (#self.Items + 1)] = item
  self.ItemAdded:Fire(item)
  if cb ~= nil then 
    cb()
  end
end

--Removes item in slot "slot"
function Inventory:RemoveItem(slot, cb)
  self.ItemRemoved:Fire(self:GetItemInSlot(slot))
  table.remove(self.Items, slot)
  if cb ~= nil then 
    cb()
  end
end

--Gets the item in the inventory slot of "slot"
function Inventory:GetItemInSlot(wantedSlot)
  for slot, item in pairs(self.Items) do
    if slot == wantedSlot then
      return item
    end
  end
  return nil
end

--Swap item in "slot1" to "slot" and vice versa
function Inventory:SwapItems(slot1, slot2)
  local item1, item2 = self:GetItemInSlot(slot1), self:GetItemInSlot(slot2)
  self:RemoveItem(slot1)
  self:RemoveItem(slot2)
  self:AddItem(item1, slot2)
  self:AddItem(item2, slot1)
end


--Clears the inventory
function Inventory:Clear()
  self.Items = {}
end



local InventoryClass = mobj:NewClass("Inventory", nil, Inventory)
return InventoryClass