Toasts managing Future's

[randreu28]

Feature Request: Handle Loading States and Futures

Description

First of all, thank you for creating and maintaining the Toastification library. It has been incredibly helpful for managing user notifications in Flutter applications.

I recently came across a web technology called Sonner, which provides an interesting approach to handling asynchronous tasks such as promises. Sonner's API allows developers to pass a promise directly, and it automatically handles the loading, success, and error states when the promise resolves or rejects.

Inspired by this approach, I believe it would be a fantastic feature for Toastification to also handle Flutter's Futures in a similar way.

Proposal

I would like to propose adding support for handling loading states and Futures directly within the Toastification library. This could be achieved by:

• Allowing developers to pass a Future to Toastification, and based on the state of the Future, the library could:
  • Display a "loading" toast while the Future is in progress.
  • Show a "success" toast when the Future completes successfully.
  • Display an "error" toast if the Future fails with an exception.

Example Usage

Toastification.showFuture(
  future: someAsyncFunction(),
  loadingMessage: 'Processing...',
  successMessage: (_data) =>: 'Operation Successful!',
  errorMessage: (_error) =>: 'Something went wrong.',
);

A simple V1 of this could be to add a new ToastificationType.loading to handle the loading states manually, with an upcoming plan of V2 of this feature of allowing the developer to pass directly the Future, with some defaults for loading, sucess and error cases

Considerations

• When handling a Future,when it resolves, the toast must be updated, instead of creating a new toast.
• This could be resolved in different ways. One of the could be that wen you call the show on each toast you could pass an optional toastId, updating that specific toast, instead of creating a new one:

final toastId = toastification.show(
	  context: context,
	  type: ToastificationType.loading, // New toast style
	  title: Text("Loading...."),
	  ....
	);
	
await Future.delayed(Duration(seconds: 3)); // Simulate an API call

toastification.show(
	  context: context,
	  type: ToastificationType.success,
	  title: Text("Operation succesfull"),
	  toastId: toastId // This will update the previous toast
	  ....
	);