inventory actions

mranderson.lua

@@ -48,6 +48,8 @@ local GAME_STATE_INTRO = 1
 local GAME_STATE_MENU = 2
 local GAME_STATE_GAME = 3
 local GAME_STATE_DIALOG = 4
+local GAME_STATE_INVENTORY = 5
+local GAME_STATE_INVENTORY_ACTION = 6
 
 --------------------------------------------------------------------------------
 -- Modules
@@ -58,6 +60,7 @@ local Menu = {}
 local Game = {}
 local UI = {}
 local Input = {}
+local Inventory = {}
 local NpcActions = {}
 local ItemActions = {}
 local MenuActions = {}
@@ -67,6 +70,7 @@ local MenuActions = {}
 --------------------------------------------------------------------------------
 local State = {
   game_state = GAME_STATE_SPLASH,
+  inventory = {},
   intro = {
     y = Config.screen.height,
     speed = 0.5,
@@ -93,6 +97,7 @@ local State = {
   },
   menu_items = {},
   selected_menu_item = 1,
+  selected_inventory_item = 1,
   dialog_menu_items = {},
   selected_dialog_menu_item = 1,
   active_entity = nil,
@@ -144,6 +149,49 @@ local State = {
   }
 }
 
+--------------------------------------------------------------------------------
+-- Inventory Module
+--------------------------------------------------------------------------------
+function Inventory.draw()
+  cls(Config.colors.dark_grey)
+  UI.draw_top_bar("Inventory")
+
+  if #State.inventory == 0 then
+    print("Inventory is empty.", 70, 70, Config.colors.light_grey)
+  else
+    for i, item in ipairs(State.inventory) do
+			local color = Config.colors.light_grey
+			if i == State.selected_inventory_item then
+				color = Config.colors.green
+				print(">", 60, 20 + i * 10, color)
+			end
+      print(item.name, 70, 20 + i * 10, color)
+    end
+  end
+end
+
+function Inventory.update()
+  State.selected_inventory_item = UI.update_menu(State.inventory, State.selected_inventory_item)
+
+  if Input.action() and #State.inventory > 0 then
+    local selected_item = State.inventory[State.selected_inventory_item]
+    State.active_entity = selected_item
+    State.dialog_text = selected_item.name
+    State.game_state = GAME_STATE_INVENTORY_ACTION
+    State.dialog_menu_items = {
+      {label = "Use", action = ItemActions.use},
+      {label = "Drop", action = ItemActions.drop},
+      {label = "Look at", action = ItemActions.look_at},
+      {label = "Goodbye", action = ItemActions.inventory_goodbye}
+    }
+    State.selected_dialog_menu_item = 1
+  end
+
+  if Input.back() then
+    State.game_state = GAME_STATE_GAME
+  end
+end
+
 --------------------------------------------------------------------------------
 -- Menu Actions
 --------------------------------------------------------------------------------
@@ -180,13 +228,57 @@ end
 --------------------------------------------------------------------------------
 -- Item Actions
 --------------------------------------------------------------------------------
-function ItemActions.use() end
-function ItemActions.look_at() end
-function ItemActions.take_away() end
+function ItemActions.use()
+  print("Used item: " .. State.active_entity.name)
+  State.game_state = GAME_STATE_INVENTORY
+end
+function ItemActions.look_at()
+  print("Looked at item: " .. State.active_entity.name)
+	State.game_state = GAME_STATE_INVENTORY
+end
+function ItemActions.put_away()
+  -- Add item to inventory
+  table.insert(State.inventory, State.active_entity)
+
+  -- Remove item from screen
+  local currentScreenData = State.screens[State.current_screen]
+  for i, item in ipairs(currentScreenData.items) do
+    if item == State.active_entity then
+      table.remove(currentScreenData.items, i)
+      break
+    end
+  end
+
+  -- Go back to game
+  State.game_state = GAME_STATE_GAME
+end
 function ItemActions.goodbye()
   State.game_state = GAME_STATE_GAME
 end
 
+function ItemActions.inventory_goodbye()
+	State.game_state = GAME_STATE_INVENTORY
+end
+
+function ItemActions.drop()
+  -- Remove item from inventory
+  for i, item in ipairs(State.inventory) do
+    if item == State.active_entity then
+      table.remove(State.inventory, i)
+      break
+    end
+  end
+
+  -- Add item to screen
+  local currentScreenData = State.screens[State.current_screen]
+	State.active_entity.x = State.player.x
+	State.active_entity.y = State.player.y
+  table.insert(currentScreenData.items, State.active_entity)
+
+  -- Go back to inventory
+  State.game_state = GAME_STATE_INVENTORY
+end
+
 
 --------------------------------------------------------------------------------
 -- Input Module
@@ -412,8 +504,7 @@ function Game.update()
       end
     end
 
-    if interaction_found then return end
-
+    if not interaction_found then
       -- Item interaction
       for _, item in ipairs(currentScreenData.items) do
         if math.abs(State.player.x - item.x) < 8 and math.abs(State.player.y - item.y) < 8 then
@@ -423,14 +514,21 @@ function Game.update()
           State.dialog_menu_items = {
             {label = "Use", action = ItemActions.use},
             {label = "Look at", action = ItemActions.look_at},
-          {label = "Take away", action = ItemActions.take_away},
+            {label = "Put away", action = ItemActions.put_away},
             {label = "Goodbye", action = ItemActions.goodbye}
           }
           State.selected_dialog_menu_item = 1
+          interaction_found = true
           break
         end
       end
     end
+
+    -- If no interaction happened, open inventory
+    if not interaction_found then
+      State.game_state = GAME_STATE_INVENTORY
+    end
+  end
 end
 
 function Game.update_dialog()
@@ -473,6 +571,15 @@ local STATE_HANDLERS = {
     UI.draw_dialog()
     Game.update_dialog()
   end,
+  [GAME_STATE_INVENTORY] = function()
+    Inventory.update()
+    Inventory.draw()
+  end,
+  [GAME_STATE_INVENTORY_ACTION] = function()
+    Inventory.draw() -- Draw inventory behind dialog
+    UI.draw_dialog()
+    Game.update_dialog()
+  end,
 }
 
 function TIC()