Implemented joystick input.

I had to redo how input is done entirely, so more than one source of input can be used for game inputs.

I added new inputs, menu_decide and menu_back. Return and escape still have their reserved status, sending menu_decide and menu_back, respectively. Other keys are reserved too, like arrows, to ensure users can always reconfigure input.

main.lua

@@ -23,7 +23,6 @@ function love.load()
 	end
 	
 	if not config.input then
-		config.input = {}
 		scene = InputConfigScene()
 	else
 		if config.current_mode then current_mode = config.current_mode end
@@ -110,16 +109,127 @@ function love.draw()
 	love.graphics.pop()
 end
 
-function love.keypressed(key, scancode, isrepeat)
+function love.keypressed(key, scancode)
 	-- global hotkeys
 	if scancode == "f4" then
 		config["fullscreen"] = not config["fullscreen"]
 		love.window.setFullscreen(config["fullscreen"])
+  -- reserved keys, so the user can always get back to configure input
+  elseif scancode == "return" then
+    scene:onInputPress({input="menu_decide", type="key", key=key, scancode=scancode})
+  elseif scancode == "escape" then
+    scene:onInputPress({input="menu_back", type="key", key=key, scancode=scancode})
+  elseif scancode == "left" or scancode == "right" or scancode == "up" or scancode == "down" then
+    scene:onInputPress({input=scancode, type="key", key=key, scancode=scancode})
+  -- other keys can be configured
 	else
-		scene:onKeyPress({key=key, scancode=scancode, isRepeat=isrepeat})
+    local input_pressed = nil
+    if config.input and config.input.keys then
+      input_pressed = config.input.keys[scancode]
+    end
+		scene:onInputPress({input=input_pressed, type="key", key=key, scancode=scancode})
 	end
 end
 
+function love.keyreleased(key, scancode)
+  -- reserved keys, so the user can always get back to configure input
+  if scancode == "return" then
+    scene:onInputRelease({input="menu_decide", type="key", key=key, scancode=scancode})
+  elseif scancode == "escape" then
+    scene:onInputRelease({input="menu_back", type="key", key=key, scancode=scancode})
+  elseif scancode == "left" or scancode == "right" or scancode == "up" or scancode == "down" then
+    scene:onInputRelease({input=scancode, type="key", key=key, scancode=scancode})
+  -- other keys can be configured
+	else
+    local input_released = nil
+    if config.input and config.input.keys then
+      input_released = config.input.keys[scancode]
+    end
+		scene:onInputRelease({input=input_released, type="key", key=key, scancode=scancode})
+	end
+end
+
+function love.joystickpressed(joystick, button)
+  local input_pressed = nil
+  if
+    config.input and
+    config.input.joysticks and
+    config.input.joysticks[joystick:getName()] and
+    config.input.joysticks[joystick:getName()].buttons
+  then
+    input_pressed = config.input.joysticks[joystick:getName()].buttons[button]
+  end
+  scene:onInputPress({input=input_pressed, type="joybutton", name=joystick:getName(), button=button})
+end
+
+function love.joystickreleased(joystick, button)
+  local input_released = nil
+  if
+    config.input and
+    config.input.joysticks and
+    config.input.joysticks[joystick:getName()] and
+    config.input.joysticks[joystick:getName()].buttons
+  then
+    input_released = config.input.joysticks[joystick:getName()].buttons[button]
+  end
+  scene:onInputRelease({input=input_released, type="joybutton", name=joystick:getName(), button=button})
+end
+
+function love.joystickaxis(joystick, axis, value)
+  local input_pressed = nil
+  local positive_released = nil
+  local negative_released = nil
+  if
+    config.input and
+    config.input.joysticks and
+    config.input.joysticks[joystick:getName()] and
+    config.input.joysticks[joystick:getName()].axes and
+    config.input.joysticks[joystick:getName()].axes[axis] 
+  then
+    if math.abs(value) >= 0.5 then
+      input_pressed = config.input.joysticks[joystick:getName()].axes[axis][value >= 0.5 and "positive" or "negative"]
+    end
+    positive_released = config.input.joysticks[joystick:getName()].axes[axis].positive
+    negative_released = config.input.joysticks[joystick:getName()].axes[axis].negative
+  end
+  if math.abs(value) >= 0.5 then
+    scene:onInputPress({input=input_pressed, type="joyaxis", name=joystick:getName(), axis=axis, value=value})
+  else
+    scene:onInputRelease({input=positive_released, type="joyaxis", name=joystick:getName(), axis=axis, value=value})
+    scene:onInputRelease({input=negative_released, type="joyaxis", name=joystick:getName(), axis=axis, value=value})
+  end
+end
+
+function love.joystickhat(joystick, hat, direction)
+  local input_pressed = nil
+  local has_hat = false
+  if
+    config.input and
+    config.input.joysticks and
+    config.input.joysticks[joystick:getName()] and
+    config.input.joysticks[joystick:getName()].hats and
+    config.input.joysticks[joystick:getName()].hats[hat]
+  then
+    if direction ~= "c" then
+      input_pressed = config.input.joysticks[joystick:getName()].hats[hat][direction]
+    end
+    has_hat = true
+  end
+  if input_pressed then
+    scene:onInputPress({input=input_pressed, type="joyhat", name=joystick:getName(), hat=hat, direction=direction})
+  elseif has_hat then
+    for i, direction in ipairs{"d", "l", "ld", "lu", "r", "rd", "ru", "u"} do
+      scene:onInputRelease({input=config.input.joysticks[joystick:getName()].hats[hat][direction], type="joyhat", name=joystick:getName(), hat=hat, direction=direction})
+    end
+  elseif direction ~= "c" then
+    scene:onInputPress({input=nil, type="joyhat", name=joystick:getName(), hat=hat, direction=direction})
+  else
+    for i, direction in ipairs{"d", "l", "ld", "lu", "r", "rd", "ru", "u"} do
+      scene:onInputRelease({input=nil, type="joyhat", name=joystick:getName(), hat=hat, direction=direction})
+    end
+  end
+end
+
 function love.focus(f)
 	if f then
 		resumeBGM()