Helper class

Helper class for common functionalities like validations and snack bars This class extends GetxController to leverage GetX's reactive state management. It provides static methods for validating user inputs such as usernames, emails, and passwords, as well as methods for displaying various types of snack bars (success, warning, error, modern).

Inheritance

Constructors

Helper.new()

Properties

hashCode → int: The hash code for this object.
no setterinherited
hasListeners → bool: no setterinherited
initialized → bool: Checks whether the controller has already been initialized.
no setterinherited
isClosed → bool: Checks whether the controller has already been closed.
no setterinherited
listeners → int: no setterinherited
onDelete → InternalFinalCallback<void>: Internal callback that starts the cycle of this controller.
finalinherited
onStart → InternalFinalCallback<void>: Called at the exact moment the widget is allocated in memory. It uses an internal "callable" type, to avoid any @overrides in subclases. This method should be internal and is required to define the lifetime cycle of the subclass.
finalinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited

Methods

$configureLifeCycle() → void: inherited
addListener(GetStateUpdate listener) → Disposer: Register a closure to be called when the object notifies its listeners.
inherited
addListenerId(Object? key, GetStateUpdate listener) → Disposer: inherited
dispose() → void: inherited
disposeId(Object id) → void: To dispose an id from future updates(), this ids are registered by GetBuilder() or similar, so is a way to unlink the state change with the Widget from the Controller.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
notifyChildrens() → void: inherited
onClose() → void: Called before onDelete method. onClose might be used to dispose resources used by the controller. Like closing events, or streams before the controller is destroyed. Or dispose objects that can potentially create some memory leaks, like TextEditingControllers, AnimationControllers. Might be useful as well to persist some data on disk.
inherited
onInit() → void: Called immediately after the widget is allocated in memory. You might use this to initialize something for the controller.
inherited
onReady() → void: Called 1 frame after onInit(). It is the perfect place to enter navigation events, like snackbar, dialogs, or a new route, or async request.
inherited
refresh() → void: inherited
refreshGroup(Object id) → void: inherited
removeListener(VoidCallback listener) → void: Remove a previously registered closure from the list of closures that the object notifies.
inherited
removeListenerId(Object id, VoidCallback listener) → void: inherited
toString() → String: A string representation of this object.
inherited
update([List<Object>? ids, bool condition = true]) → void: Rebuilds GetBuilder each time you call update(); Can take a List of ids, that will only update the matching GetBuilder( id: ), ids can be reused among GetBuilders like group tags. The update will only notify the Widgets, if condition is true.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited

Static Methods

errorSnackBar({required String title, dynamic message}) → void: Displays an error snack bar with a title and message. @param title The title of the snack bar. @param message The message to display in the snack bar. @return void
isUsernameTaken(String username) → Future<bool>: Checks if a username is already taken in the Firestore database. @param username The username string to check. @return A Future that resolves to true if the username is taken, false otherwise.
modernSnackBar({required String title, dynamic message}) → void: Displays a modern snack bar with a title and message. @param title The title of the snack bar. @param message The message to display in the snack bar. @return void
repeatPassword(String value, dynamic controller, BuildContext context) → String?: Validates a password confirmation to ensure it matches the original password. @param value The confirmation password string to validate. @param controller The controller containing the original password. @param context The BuildContext for localization. @return A string error message if validation fails, or null if it passes.
successSnackBar({required String title, dynamic message}) → void: Displays a success snack bar with a title and message. @param title The title of the snack bar. @param message The message to display in the snack bar. @return void
validateEmail(String? value, BuildContext context) → String?: Validates an email address to ensure it is not empty, has a valid format, and DHBW domain. @param value The email string to validate. @param context The BuildContext for localization. @return A string error message if validation fails, or null if it passes.
validateFullName(String? value, BuildContext context) → String?: Validates a full name to ensure it contains only letters and spaces. @param value The full name string to validate. @param context The BuildContext for localization. @return A string error message if validation fails, or null if it passes.
validatePassword(String? value, BuildContext context) → String?: Validates a password to ensure it meets specific criteria:
validateUsername(String? value, BuildContext context) → String?: Validates a username based on specific criteria:
warningSnackBar({required String title, dynamic message}) → void: Displays a warning snack bar with a title and message. @param title The title of the snack bar. @param message The message to display in the snack bar. @return void