How to implement an API call linked to a Provider using SOLID principles in a Flutter app?

Question

I am trying to refactor my Flutter weather application.

It eventually calls an API to provide weather data based with a location as a parameter.

Currently, I have :

• A WeatherJSONModel.dart which corresponds to the JSON response given by the API I use.
• A WeatherAPI.dart files which manages to call the API with the parameters, and parse the JSON response into a the above model.
• A WeatherModel.dart which is the model for the data displayed by the app.
• A WeatherProvider (extends ChangeNotifier) which converts the WeatherJSONModel returned by the API into a WeatherModel then made available for the app.

I very much doubt this the most efficient way to do it, but can't find how to properly implement my calls.

Should it be more APICallClass into ResponseHandlerClass into ProviderClass ?

Thank you !

TLDR; How to implement API calls and JSON parsing following SOLID principles ?

Answer 1

One of the best tutorials on this topic in flutter (in my opinion) can be found here:

https://github.com/ResoCoder/flutter-tdd-clean-architecture-course

There is also a written series and a 7 hour YouTube Tutorial of this:

Here is the architectur proposal: