Requirements 🖇️

• Dart sdk: ">=2.17.6 <3.0.0"
• Flutter: ">=3.3.8"

Usage ⚒️

You can refer to the example folder to know how to implement the package.

First you need to inject the CacheStrategyPackage() (it's a Singleton)

Then, you can call execute() method and inject the parameters required depending on the strategy choosen (boxeName,async, serializer...)

You can use one of these 4 differents strategies :

• AsyncOrCacheStrategy which will first trigger a remote call to retrieve the data and store it in the device's cache. If the call generates an error at any point, the data in the cache will be retrieved.

• CacheOrAsyncStrategy works in reverse to the above strategy, looking for cached data first and if null is returned then a remote call is triggered.

• JustAsyncStrategy will only trigger a remote call to retrieve data.

• JustCacheStrategy will only fetch cached data.

    final _provider = FetchDataImpl();
    final _package = CacheStrategyPackage();
    
    final List<MealDto>? frenchFood = await _package
            .execute<List<MealDto>>(
        keyCache: "frenchFood",
        boxeName: "EuropeanBoxe",
        serializer: (data) => MealDto.fromData(data),
        async: _provider.getFrenchFood(),
        strategy: AsyncOrCacheStrategy(),
        isEncrypted: true,
        )
            .onError((error, stackTrace) {
        throw error ?? Error();
        });

I advise to implement the package in your repository. Its role is to convert the dto into an entity, so handling data caching here seems relevant.

And that's all !

Example 📱

• When it's set on AsyncOrCacheStrategy :
  

• Now turn off the internet and pull down to refresh the lists, you'll still see the meals :
  

• Now click on Remove French food from cache :
  

You can see now that the French food has been removed from the cache but the Italian food is still there.

• Now if you click on Remove European food from cache :
  

There are no more European meals since this box has been cleaned of the cache but the Indian meals are still present as they are stored in a different box.

Articles / Resources 📚

This package is the completion of that article I wrote.

Pull requests ⬇️

Pull requests are welcome, I'm a beginner so don't hesitate if you see any corrections.

Additional information

• https://github.com/romgrm/flutter_cache_strategy