Godot custom input map loader

input_map.cfg

[move_up]
axis="LEFT_Y"
axis_value=-1.0
key=["w", "UP"]

[move_down]
axis="LEFT_Y"
axis_value=1.0
key=["s","DOWN"]

[move_left]
axis="LEFT_X"
axis_value=-1.0
key=["a","LEFT"]

[move_right]
axis="LEFT_X"
axis_value=1.0
key=["d","RIGHT"]

[sprint]
button = "BUTTON_LEFT_STICK"
key="SHIFT"

[crouch]
button = "BUTTON_RIGHT_STICK"
key="CTRL"

[jump]
button = "JOY_BUTTON_X"
key="SPACEBAR"

[kick]
button = "JOY_BUTTON_A"
key="f"

[look_left]
axis="RIGHT_Y"
axis_value=-1.0

[look_right]
axis="RIGHT_Y"
axis_value=1.0

[look_up]
axis="RIGHT_X"
axis_value=-1.0

[look_down]
axis="RIGHT_X"
axis_value=1.0

input_map.gd

#no class name because it's a singleton
extends Node 

#set as an autoload singleton GlobalInputMap
#then call GlobalInputMap.load_input_map(path_to_map)
#in the ready function of the player

var input_map :ConfigFile = ConfigFile.new()

var const_map:Dictionary = { 
	"AXIS_INVALID": JOY_AXIS_INVALID,
	"LEFT_X": JOY_AXIS_LEFT_X,
	"LEFT_Y": JOY_AXIS_LEFT_Y,
	"RIGHT_X": JOY_AXIS_RIGHT_X,
	"RIGHT_Y": JOY_AXIS_RIGHT_Y,
	"TRIGGER_LEFT": JOY_AXIS_TRIGGER_LEFT,
	"TRIGGER_RIGHT": JOY_AXIS_TRIGGER_RIGHT,
	"JOY_INVALID": JOY_BUTTON_INVALID,
	"JOY_BUTTON_A": JOY_BUTTON_A,
	"JOY_BUTTON_B": JOY_BUTTON_B,
	"JOY_BUTTON_X": JOY_BUTTON_X,
	"JOY_BUTTON_Y": JOY_BUTTON_Y,
	"BACK" : JOY_BUTTON_BACK,
	"GUIDE" : JOY_BUTTON_GUIDE,
	"START" : JOY_BUTTON_START,
	"BUTTON_LEFT_STICK" : JOY_BUTTON_LEFT_STICK,
	"BUTTON_RIGHT_STICK" : JOY_BUTTON_RIGHT_STICK,
	"LEFT_SHOULDER" : JOY_BUTTON_LEFT_SHOULDER,
	"RIGHT_SHOULDER" : JOY_BUTTON_RIGHT_SHOULDER,
	"DPAD_UP" : JOY_BUTTON_DPAD_UP,
	"DPAD_DOWN" : JOY_BUTTON_DPAD_DOWN,
	"DPAD_LEFT" : JOY_BUTTON_DPAD_LEFT,
	"DPAD_RIGHT" : JOY_BUTTON_DPAD_RIGHT,
	"MISC1" : JOY_BUTTON_MISC1,
	"PADDLE1" : JOY_BUTTON_PADDLE1,
	"PADDLE2" : JOY_BUTTON_PADDLE2,
	"PADDLE3" : JOY_BUTTON_PADDLE3,
	"PADDLE4" : JOY_BUTTON_PADDLE4,
	"TOUCHPAD" : JOY_BUTTON_TOUCHPAD
}

func load_input_map(config_path:String)->void:
	var err:int = input_map.load(config_path)
	var axis_input
	var button_input
	var key_input
	var ev:InputEvent 
	if err:
		pass 
	else:
		# defaults can't be set to null
		for action in input_map.get_sections():
			if not InputMap.has_action(action):
				InputMap.add_action(action)
			axis_input = input_map.get_value(action,"axis",false)
			if const_map.has(axis_input):
				ev=InputEventJoypadMotion.new()
				ev.device = input_map.get_value(action,"device", 0)
				ev.axis = const_map[axis_input]
				ev.axis_value = input_map.get_value(action,"axis_value")
				InputMap.action_add_event(action,ev)		
			button_input = input_map.get_value(action,"button",false)
			if const_map.has(button_input):
				ev = InputEventJoypadButton.new()
				ev.device = input_map.get_value(action,"device",-1)
				ev.button_index=const_map[button_input]
				InputMap.action_add_event(action,ev)
			key_input = input_map.get_value(action,"key",false)
			if key_input is Array:
				for key in key_input:
					ev = InputEventKey.new()
					ev.keycode =  OS.find_keycode_from_string(key)
					InputMap.action_add_event(action, ev)
			elif key_input is String:
					ev = InputEventKey.new()
					ev.keycode=OS.find_keycode_from_string(key_input)
					InputMap.action_add_event(action,ev)