save/load functionality (WIP)

inc/init/init.config.lua

@@ -1,4 +1,4 @@
-local Config = {
+local DEFAULT_CONFIG = {
   screen = {
     width = 240,
     height = 136
@@ -30,3 +30,44 @@ local Config = {
     splash_duration = 120
   }
 }
+
+local Config = {
+  -- Copy default values initially
+  screen = DEFAULT_CONFIG.screen,
+  colors = DEFAULT_CONFIG.colors,
+  player = DEFAULT_CONFIG.player,
+  physics = DEFAULT_CONFIG.physics,
+  timing = DEFAULT_CONFIG.timing,
+}
+
+local CONFIG_SAVE_BANK = 7
+local CONFIG_SAVE_ADDRESS_MOVE_SPEED = 0
+local CONFIG_SAVE_ADDRESS_MAX_JUMPS = 1
+local CONFIG_MAGIC_VALUE_ADDRESS = 2
+local CONFIG_MAGIC_VALUE = 0xDE -- A magic number to check if config is saved
+
+function Config.save()
+  -- Save physics settings
+  mset(Config.physics.move_speed * 10, CONFIG_SAVE_ADDRESS_MOVE_SPEED, CONFIG_SAVE_BANK)
+  mset(Config.physics.max_jumps, CONFIG_SAVE_ADDRESS_MAX_JUMPS, CONFIG_SAVE_BANK)
+  mset(CONFIG_MAGIC_VALUE, CONFIG_MAGIC_VALUE_ADDRESS, CONFIG_SAVE_BANK) -- Mark as saved
+end
+
+function Config.load()
+  -- Check if config has been saved before using a magic value
+  if mget(CONFIG_MAGIC_VALUE_ADDRESS, CONFIG_SAVE_BANK) == CONFIG_MAGIC_VALUE then
+    Config.physics.move_speed = mget(CONFIG_SAVE_ADDRESS_MOVE_SPEED, CONFIG_SAVE_BANK) / 10
+    Config.physics.max_jumps = mget(CONFIG_SAVE_ADDRESS_MAX_JUMPS, CONFIG_SAVE_BANK)
+  else
+    Config.restore_defaults()
+  end
+end
+
+function Config.restore_defaults()
+  Config.physics.move_speed = DEFAULT_CONFIG.physics.move_speed
+  Config.physics.max_jumps = DEFAULT_CONFIG.physics.max_jumps
+  -- Any other configurable items should be reset here
+end
+
+-- Load configuration on startup
+Config.load()

inc/init/init.context.lua

@@ -1,4 +1,31 @@
-local Context = {
+local SAVE_GAME_BANK = 6
+local SAVE_GAME_MAGIC_VALUE_ADDRESS = 0
+local SAVE_GAME_MAGIC_VALUE = 0xCA
+
+local SAVE_GAME_PLAYER_X_ADDRESS = 1
+local SAVE_GAME_PLAYER_Y_ADDRESS = 2
+local SAVE_GAME_PLAYER_VX_ADDRESS = 3
+local SAVE_GAME_PLAYER_VY_ADDRESS = 4
+local SAVE_GAME_PLAYER_JUMPS_ADDRESS = 5
+local SAVE_GAME_CURRENT_SCREEN_ADDRESS = 6
+
+local VX_VY_OFFSET = 128 -- Offset for negative velocities
+
+-- Helper for deep copying tables
+local function clone_table(t)
+  local copy = {}
+  for k, v in pairs(t) do
+    if type(v) == "table" then
+      copy[k] = clone_table(v)
+    else
+      copy[k] = v
+    end
+  end
+  return copy
+end
+
+local function create_initial_context()
+  return {
     active_window = WINDOW_SPLASH,
     inventory = {},
     intro = {
@@ -35,8 +62,9 @@ local Context = {
     menu_items = {},
     selected_menu_item = 1,
     selected_inventory_item = 1,
-  -- Screen data
-  screens = {
+    game_in_progress = false, -- New flag
+    -- Screen data (deep copy to ensure new game resets correctly)
+    screens = clone_table({
       {
         -- Screen 1
         name = "Screen 1",
@@ -125,7 +153,7 @@ local Context = {
                       {label = "I guess I am.", next_node = "you_are"}
                   }
               },
-            who_are_you = {
+              who_are_are = {
                   text = "I'm the Oracle. And you're right on time. Want a cookie?",
                   options = {
                       {label = "Sure.", next_node = "cookie"},
@@ -428,5 +456,60 @@ local Context = {
         },
         items = {}
       }
+    })
   }
-}
+end
+
+Context = create_initial_context()
+
+local function reset_context_to_initial_state()
+  local initial_state = create_initial_context()
+
+  -- Clear existing keys from Context
+  for k in pairs(Context) do
+    Context[k] = nil
+  end
+
+  -- Copy all properties from initial_state to Context
+  for k, v in pairs(initial_state) do
+    Context[k] = v
+  end
+end
+
+function Context.new_game()
+  reset_context_to_initial_state()
+  Context.game_in_progress = true
+  MenuWindow.refresh_menu_items()
+end
+
+function Context.save_game()
+  if not Context.game_in_progress then return end
+
+  mset(SAVE_GAME_MAGIC_VALUE, SAVE_GAME_MAGIC_VALUE_ADDRESS, SAVE_GAME_BANK)
+  mset(Context.player.x * 10, SAVE_GAME_PLAYER_X_ADDRESS, SAVE_GAME_BANK)
+  mset(Context.player.y * 10, SAVE_GAME_PLAYER_Y_ADDRESS, SAVE_GAME_BANK)
+  mset( (Context.player.vx * 100) + VX_VY_OFFSET, SAVE_GAME_PLAYER_VX_ADDRESS, SAVE_GAME_BANK)
+  mset( (Context.player.vy * 100) + VX_VY_OFFSET, SAVE_GAME_PLAYER_VY_ADDRESS, SAVE_GAME_BANK)
+  mset(Context.player.jumps, SAVE_GAME_PLAYER_JUMPS_ADDRESS, SAVE_GAME_BANK)
+  mset(Context.current_screen, SAVE_GAME_CURRENT_SCREEN_ADDRESS, SAVE_GAME_BANK)
+end
+
+function Context.load_game()
+  if mget(SAVE_GAME_MAGIC_VALUE_ADDRESS, SAVE_GAME_BANK) ~= SAVE_GAME_MAGIC_VALUE then
+    -- No saved game found, start a new one
+    Context.new_game()
+    return
+  end
+
+  reset_context_to_initial_state()
+
+  Context.player.x = mget(SAVE_GAME_PLAYER_X_ADDRESS, SAVE_GAME_BANK) / 10
+  Context.player.y = mget(SAVE_GAME_PLAYER_Y_ADDRESS, SAVE_GAME_BANK) / 10
+  Context.player.vx = (mget(SAVE_GAME_PLAYER_VX_ADDRESS, SAVE_GAME_BANK) - VX_VY_OFFSET) / 100
+  Context.player.vy = (mget(SAVE_GAME_PLAYER_VY_ADDRESS, SAVE_GAME_BANK) - VX_VY_OFFSET) / 100
+  Context.player.jumps = mget(SAVE_GAME_PLAYER_JUMPS_ADDRESS, SAVE_GAME_BANK)
+  Context.current_screen = mget(SAVE_GAME_CURRENT_SCREEN_ADDRESS, SAVE_GAME_BANK)
+
+  Context.game_in_progress = true
+  MenuWindow.refresh_menu_items()
+end

inc/meta/meta.header.lua

@@ -3,5 +3,5 @@
 -- desc:    Life of a programmer in the Vector
 -- site:    https://github.com/rastasi/mranderson
 -- license: MIT License
--- version: 0.11
+-- version: 0.12
 -- script:  lua

inc/system/system.input.lua

@@ -1,8 +1,8 @@
 function Input.up() return btnp(0) end
 function Input.down() return btnp(1) end
-function Input.left() return btnp(2) end
-function Input.right() return btnp(3) end
+function Input.left() return btn(2) end
+function Input.right() return btn(3) end
 function Input.player_jump() return btnp(4) end
 function Input.menu_confirm() return btnp(4) end
 function Input.player_interact() return btnp(5) end -- B button
-function Input.menu_back() return btnp(5) end
+function Input.menu_back() return btnp(7) end

inc/system/system.main.lua

@@ -35,7 +35,18 @@ local STATE_HANDLERS = {
   end,
 }
 
+local initialized_game = false
+
+function init_game()
+  if initialized_game then return end
+
+  MenuWindow.refresh_menu_items()
+  initialized_game = true
+end
+
 function TIC()
+  init_game() 
+
   cls(Config.colors.black)
   local handler = STATE_HANDLERS[Context.active_window]
   if handler then

inc/system/system.ui.lua

@@ -77,3 +77,11 @@ function UI.create_numeric_stepper(label, value_getter, value_setter, min, max,
     type = "numeric_stepper"
   }
 end
+
+function UI.create_action_item(label, action)
+  return {
+    label = label,
+    action = action,
+    type = "action_item"
+  }
+end

inc/window/window.configuration.lua

@@ -17,6 +17,14 @@ function ConfigurationWindow.init()
       function(v) Config.physics.max_jumps = v end,
       1, 5, 1, "%d"
     ),
+    UI.create_action_item(
+      "Save",
+      function() Config.save() end
+    ),
+    UI.create_action_item(
+      "Restore Defaults",
+      function() Config.restore_defaults() end
+    ),
   }
 end
 
@@ -32,6 +40,7 @@ function ConfigurationWindow.draw()
     local current_y = y_start + (i - 1) * 12
     local color = Config.colors.green
     
+    if control.type == "numeric_stepper" then
       local value = control.get()
       local label_text = control.label
       local value_text = string.format(control.format, value)
@@ -49,6 +58,17 @@ function ConfigurationWindow.draw()
         print(label_text, x_start, current_y, color)
         print(value_text, value_x, current_y, color)
       end
+    elseif control.type == "action_item" then
+      local label_text = control.label
+      if i == ConfigurationWindow.selected_control then
+        color = Config.colors.item
+        print("<", x_start -8, current_y, color)
+        print(label_text, x_start, current_y, color)
+        print(">", x_start + 8 + (#label_text * char_width) + 4, current_y, color)
+      else
+        print(label_text, x_start, current_y, color)
+      end
+    end
   end
   
   print("Press B to go back", x_start, 120, Config.colors.light_grey)
@@ -56,13 +76,10 @@ end
 
 function ConfigurationWindow.update()
   if Input.menu_back() then
-    -- I need to find out how to switch back to the menu
-    -- For now, I'll assume a function GameWindow.set_state exists
     GameWindow.set_state(WINDOW_MENU)
     return
   end
 
-  -- Navigate between controls
   if Input.up() then
     ConfigurationWindow.selected_control = ConfigurationWindow.selected_control - 1
     if ConfigurationWindow.selected_control < 1 then
@@ -75,16 +92,21 @@ function ConfigurationWindow.update()
     end
   end
 
-  -- Modify control value
   local control = ConfigurationWindow.controls[ConfigurationWindow.selected_control]
   if control then
+    if control.type == "numeric_stepper" then
       local current_value = control.get()
-    if Input.left() then
+      if btnp(2) then -- Left
         local new_value = math.max(control.min, current_value - control.step)
         control.set(new_value)
-    elseif Input.right() then
+      elseif btnp(3) then -- Right
         local new_value = math.min(control.max, current_value + control.step)
         control.set(new_value)
       end
+    elseif control.type == "action_item" then
+      if Input.menu_confirm() then
+        control.action()
+      end
+    end
   end
 end

inc/window/window.game.lua

@@ -26,6 +26,11 @@ function GameWindow.draw()
 end
 
 function GameWindow.update()
+  if Input.menu_back() then
+    Context.active_window = WINDOW_MENU
+    MenuWindow.refresh_menu_items()
+    return
+  end
   Player.update() -- Call the encapsulated player update logic
 end
 

inc/window/window.menu.lua

@@ -14,17 +14,20 @@ function MenuWindow.update()
   end
 end
 
-function MenuWindow.play()
-  -- Reset player state and screen for a new game
-  Context.player.x = Config.player.start_x
-  Context.player.y = Config.player.start_y
-  Context.player.vx = 0
-  Context.player.vy = 0
-  Context.player.jumps = 0
-  Context.current_screen = 1
+function MenuWindow.new_game()
+  Context.new_game() -- This function will be created in Context
   GameWindow.set_state(WINDOW_GAME)
 end
 
+function MenuWindow.load_game()
+  Context.load_game() -- This function will be created in Context
+  GameWindow.set_state(WINDOW_GAME)
+end
+
+function MenuWindow.save_game()
+  Context.save_game() -- This function will be created in Context
+end
+
 function MenuWindow.exit()
   exit()
 end
@@ -34,9 +37,19 @@ function MenuWindow.configuration()
   GameWindow.set_state(WINDOW_CONFIGURATION)
 end
 
--- Initialize menu items after actions are defined
-Context.menu_items = {
-  {label = "Play", action = MenuWindow.play},
-  {label = "Configuration", action = MenuWindow.configuration},
-  {label = "Exit", action = MenuWindow.exit}
-}
+function MenuWindow.refresh_menu_items()
+  Context.menu_items = {
+    {label = "New Game", action = MenuWindow.new_game},
+    {label = "Load Game", action = MenuWindow.load_game},
+  }
+
+  if Context.game_in_progress then
+    table.insert(Context.menu_items, {label = "Save Game", action = MenuWindow.save_game})
+  end
+
+  table.insert(Context.menu_items, {label = "Configuration", action = MenuWindow.configuration})
+  table.insert(Context.menu_items, {label = "Exit", action = MenuWindow.exit})
+  Context.selected_menu_item = 1 -- Reset selection after refreshing
+end
+
+