Auto sync every 5 minutes of play

sources/utils/autoloads/user_data_manager.gd

@@ -25,7 +25,12 @@ var _student_difficulty: UserDifficulty
 var _student_speeches: UserSpeeches
 
 var user_database_synchronizer: UserDataBaseSynchronizer
-
+var synchronization_timer: float = 0.0
+var synchronization_timer_running: bool = false
+var synchronization_time_limit: float = 300000.0 # 5 minutes in milliseconds
+var now: int
+var last_time: float = 0.0
+var real_delta: int
 
 func _ready() -> void:
 	if get_device_settings().teacher:
@@ -34,6 +39,29 @@ func _ready() -> void:
 	user_database_synchronizer = UserDataBaseSynchronizer.new()
 
 
+func _process(_delta: float) -> void:
+	if synchronization_timer_running:
+		now = Time.get_ticks_msec()
+		real_delta = now - last_time
+		last_time = now
+		synchronization_timer += real_delta
+		if synchronization_timer >= synchronization_time_limit:
+			synchronization_timer = 0.0
+			user_database_synchronizer.synchronize()
+
+#region synchronization
+
+func start_synchronization_timer() -> void:
+	if not synchronization_timer_running:
+		synchronization_timer = 0.0
+		synchronization_timer_running = true
+
+
+func stop_synchronization_timer() -> void:
+	synchronization_timer_running = false
+
+#endregion
+
 #region Registering and logging in
 
 func register(register_settings: TeacherSettings) -> bool:

sources/utils/autoloads/user_database_synchronizer.gd

@@ -20,10 +20,11 @@ enum UpdateNeeded {
 
 func start_sync() -> void:
 	synchronizing = true
-	loading_popup.set_finished(false)
-	set_loading_bar_text("SYNCHRONIZATION_INITIALISATION")
-	await set_loading_bar_progression(0.0)
-	loading_popup.show()
+	if loading_popup != null:
+		loading_popup.set_finished(false)
+		set_loading_bar_text("SYNCHRONIZATION_INITIALISATION")
+		await set_loading_bar_progression(0.0)
+		loading_popup.show()
 
 
 func stop_sync(success: bool = false) -> void:
@@ -31,10 +32,11 @@ func stop_sync(success: bool = false) -> void:
 	if success:
 		await set_loading_bar_progression(100.0, 1.0)
 		set_loading_bar_text("SYNCHRONIZATION_SUCCESS")
-	loading_popup.set_finished(true)
+	if loading_popup != null:
+		loading_popup.set_finished(true)
 
 
-func on_synchronize_button_pressed() -> void:
+func synchronize() -> void:
 	Logger.trace("UserDataBaseSynchronizer: Start synchronizing user data.")
 	if synchronizing:
 		Logger.trace("UserDataBaseSynchronizer: User synchronization already started, cancel double-call.")