use the persistence class to store recently opened decks

graph_node_renderer/deck_holder_renderer.gd

@@ -9,6 +9,8 @@ class_name DeckHolderRenderer
 const DECK_SCENE := preload("res://graph_node_renderer/deck_renderer_graph_edit.tscn")
 const DEBUG_DECKS_LIST := preload("res://graph_node_renderer/debug_decks_list.tscn")
 
+const PERSISTENCE_NAMESPACE := "default"
+
 ## Reference to the main windows [TabContainerCustom]
 @onready var tab_container: TabContainerCustom = %TabContainerCustom as TabContainerCustom
 ## Reference to the [FileDialog] used for File operations through the program.
@@ -27,9 +29,11 @@ enum FileMenuId {
 	SAVE = 3,
 	SAVE_AS,
 	CLOSE = 6,
+	RECENTS,
 }
 @onready var file_popup_menu: PopupMenu = %File as PopupMenu
-
+var max_recents := 4
+var recent_files := []
 
 enum ConnectionsMenuId {
 	OBS,
@@ -48,6 +52,13 @@ var _deck_to_save: WeakRef
 func _ready() -> void:
 	
 	tab_container.add_button_pressed.connect(add_empty_deck)
+	RendererPersistence.init_namespace(PERSISTENCE_NAMESPACE)
+	
+	recent_files = RendererPersistence.get_or_create(
+		PERSISTENCE_NAMESPACE, "config",
+		"recent_files", []
+		)
+	add_recents_to_menu()
 
 	tab_container.tab_close_requested.connect(
 		func(tab: int):
@@ -139,6 +150,7 @@ func _on_file_dialog_open_files(paths: PackedStringArray) -> void:
 		tab_container.set_tab_metadata(tab_container.get_current_tab(), deck.id)
 		inst.initialize_from_deck()
 		inst.group_enter_requested.connect(_on_deck_renderer_group_enter_requested)
+		add_recent_file(path)
 
 ## Gets the currently active [Deck] from [member tab_container]
 func get_active_deck() -> Deck:
@@ -227,3 +239,29 @@ func _on_debug_decks_viewer_item_pressed(deck_id: String, instance_id: String) -
 		tab_container.set_tab_metadata(tab_container.get_current_tab(), deck.id)
 		inst.initialize_from_deck()
 		inst.group_enter_requested.connect(_on_deck_renderer_group_enter_requested)
+
+
+func add_recent_file(path: String) -> void:
+	var item := recent_files.find(path)
+	if item == -1:
+		recent_files.push_front(path)
+	else:
+		recent_files.push_front(recent_files.pop_at(item))
+	recent_files = recent_files.slice(0, max_recents)
+	
+	add_recents_to_menu()
+
+
+func add_recents_to_menu() -> void:
+	if recent_files.is_empty():
+		return
+		
+	if file_popup_menu.get_item_count() > FileMenuId.RECENTS + 1:
+		for i in range(FileMenuId.RECENTS, file_popup_menu.get_item_count() - FileMenuId.RECENTS + 1):
+			file_popup_menu.remove_item(i)
+		
+	for i in recent_files:
+		file_popup_menu.add_item(i)
+
+	RendererPersistence.set_value(PERSISTENCE_NAMESPACE, "config", "recent_files", recent_files)
+	RendererPersistence.commit(PERSISTENCE_NAMESPACE)

graph_node_renderer/deck_holder_renderer.tscn

@@ -93,7 +93,7 @@ layout_mode = 2
 
 [node name="File" type="PopupMenu" parent="MarginContainer/VSplitContainer/VBoxContainer/MenuBar"]
 unique_name_in_owner = true
-item_count = 7
+item_count = 8
 item_0/text = "New Deck"
 item_0/id = 0
 item_1/text = "Open Deck"
@@ -110,6 +110,9 @@ item_5/id = 5
 item_5/separator = true
 item_6/text = "Close Deck"
 item_6/id = 6
+item_7/text = "Recent Decks"
+item_7/id = 7
+item_7/separator = true
 
 [node name="Edit" type="PopupMenu" parent="MarginContainer/VSplitContainer/VBoxContainer/MenuBar"]
 unique_name_in_owner = true