add support to initialise and save board state to savegame

src/logic-scenes/board/card-board.gd

@@ -349,3 +349,43 @@ func find_first_free_card() -> int:
 func on_sticky_panel_cleared():
 	if current_sticky_note_id == sticky_note_container.get_child_count() - 1:
 		current_sticky_note_id -= 1
+
+
+func get_save_dict() -> Dictionary:
+	var cards: Dictionary = {}
+	var stickies: Dictionary = {}
+	
+	for child in dropzone.get_children():
+		if child is Card:
+			if child.has_sticky_note_attached():
+				stickies[child.get_attached_sticky_note().name] = child.name
+			cards[child.name] = child.transform.origin
+		elif child is StickyNote:
+			cards[child.name] = child.transform.origin
+	
+	for child in sticky_note_container.get_children():
+		if child is PostItPanel:
+			stickies[child.attached_sticky_note.name] = -1
+	return {
+		"cards": cards,
+		"stickies": stickies
+	}
+
+func initialise_from_save(savegame: SaveGame):
+	var cards: Dictionary = savegame.board_state["cards"]
+	var stickies: Dictionary = savegame.board_state["stickies"]
+	
+	var card_pile = board_of_devs.get_cards_by_name_array(cards.keys() + (stickies.keys()))
+	
+	for card:Card in card_pile["cards"]:
+		add_card(card)
+		card.transform.origin = cards[card.name]
+		cards[card.name] = card
+	for sticky:StickyNote in card_pile["sticky_notes"]:
+		if stickies[sticky.name] == -1:
+			add_sticky_note(sticky)
+		if stickies[sticky.name] is String:
+			cards[stickies[sticky.name]].attach_sticky_note(sticky)
+		else:
+			insert_area(dropzone, sticky)
+			sticky.transform.origin = stickies[sticky.name]

src/logic-scenes/board/card.gd

@@ -171,6 +171,9 @@ func _move_card():
 func has_sticky_note_attached() -> bool:
 	return get_child(-1) is StickyNote
 
+func get_attached_sticky_note() -> StickyNote:
+	return null if not has_sticky_note_attached() else get_child(-1)
+
 func preview_sticky_note(sticky_note: StickyNote):
 	sticky_note.reparent(self.get_parent())
 	sticky_note.owner = owner