implement dynamic cloud sync

src/dev-util/steamworks.gd

@@ -1,10 +1,39 @@
 extends Node
 
-var has_initialized
+var is_initialized: bool = false
+var steam_cloud_on: bool = false
+var save_list: Dictionary[String, SaveGame]
 
 func _ready() -> void:
 	var initialize_response: Dictionary = Steam.steamInitEx()
 	if State.disconnect_steam:
 		Steam.steamShutdown()
+	elif initialize_response["status"] == Steam.STEAM_API_INIT_RESULT_OK:
+		steam_cloud_on = Steam.isCloudEnabledForAccount() && Steam.isCloudEnabledForApp()
+		
+		Steam.local_file_changed.connect(_on_steam_cloud_file_changed)
+		Steam.inputInit()
+		Steam.enableDeviceCallbacks()
+		SteamInputManager.init()
+		
+		is_initialized = true
 	else:
-		has_initialized = initialize_response["status"] == 0
+		SteamInputManager.process_mode = Node.PROCESS_MODE_DISABLED
+
+func _on_steam_cloud_file_changed() -> void:
+	if OS.has_feature("debug"):
+		print("Received Steam localFileChanged callback...")
+		
+	var paths_changed: PackedStringArray = []
+	var paths_deleted: PackedStringArray = []
+
+	for i: int in  Steam.getLocalFileChangeCount():
+		var result: Dictionary = Steam.getLocalFileChange(i)
+		if result["path_type"] == Steam.FILE_PATH_TYPE_ABSOLUTE:
+			if result["file"].ends_with("png"): pass
+			if result["change_type"] == Steam.LOCAL_FILE_CHANGE_FILE_UPDATED:
+				paths_changed.append(result["file"])
+			elif result["change_type"] == Steam.LOCAL_FILE_CHANGE_FILE_DELETED:
+				paths_deleted.append(result["file"])
+	
+	Main.handle_save_update(paths_changed, paths_deleted)