func rook_move(object, start_square, new_square):
    var start_xy = Global.label_to_xy(start_square.label)
    var new_xy = Global.label_to_xy(new_square.label)
    if new_xy.x != start_xy.x and new_xy.y != start_xy.y:
        return false
    if new_xy.y == start_xy.y:
        if new_xy.x > start_xy.x:
            for i in range(start_xy.x + 1, new_xy.x, 1):
                var square = Global.xy_to_square(Vector2i(i, start_xy.y))
                if square.occupied:
                    if square.guest.colour != colour:
                        return true
                    else:
                        return false
        else:
            for i in range(new_xy.x - 1, start_xy.x, -1):
                var square = Global.xy_to_square(Vector2i(i, start_xy.y))
                if square.occupied:
                    if square.guest.colour == colour:
                        return false
                    else:
                        return true
            return true
    elif new_xy.x == start_xy.x:
        if new_xy.y > start_xy.y:
            for i in range(start_xy.y + 1, new_xy.y, 1):
                var square = Global.xy_to_square(Vector2i(start_xy.x, i))
                if square.occupied:
                    if square.guest.colour != colour:
                        return true
                    else:
                        return false
        else:
            for i in range(new_xy.y - 1, start_xy.y, -1):
                var square = Global.xy_to_square(Vector2i(start_xy.x, i))
                if square.occupied:
                    if square.guest.colour == colour:
                        return false
                    else:
                        return true
            return true
    else:
        return false

----
# Global functions used above:

func label_to_xy(label: String):
    var out: Vector2i
    var files = {"A": 1, "B": 2, "C": 3, "D": 4, "E": 5, "F": 6, "G": 7, "H": 8}
    var file = files[label[0]]
    var rank = int(label[1])
    out = Vector2i(file, rank)
    return out

func xy_to_square(xy: Vector2i):
    var label = xy_to_label(xy)
    var square = label_squareobj[label]
    return square

# The Squares class
extends Node2D
class_name squares
signal broadcast(ID: Object, label: String, occupied: bool)

@export var light: bool
var label: String
var occupied: bool
var guest: Object
var xy: Vector2i

func _ready():
    $Sprite2D.scale = Vector2i(70,70)
    if light: $Sprite2D.self_modulate = Color(0.98, 0.647, 0.455)
    else: $Sprite2D.self_modulate = Color(0.321, 0.175, 0.029)
    var Label = Label.new()
    Label.text = label
    if light: Label.self_modulate.a = 0.9
    else: Label.self_modulate.a = 0.5
    Label.horizontal_alignment = HORIZONTAL_ALIGNMENT_RIGHT
    Label.vertical_alignment = VERTICAL_ALIGNMENT_BOTTOM
    Label.position.x += 10
    Label.position.y += 10
    add_child(Label)
    emit_signal("broadcast", self, label, null)