Memory-based cache for Web platform

[Wauplin]

Hi there !

First of all, thanks a lot for this convenient library ! I started to use it for a hobby project of mine and it helped me to integrate Firebase Image without having to handle urls by manually so thanks for that 🙂

The project I'm working on is quite simple but I needed to make it work for the Web platform as well. I implemented a basic version of the FirebaseImageCacheManager that works with a simple Map structure in memory if sqflite library is not installed.
Of course it comes with limitations (no persistence, no shared memory between tabs) but it's enough for my use-case. I created this PR in case it can help other people.

It is currently in draft mode, please tell me if you are interested in merging it. I have changed some naming and added an abstract class. I can adapt some code if required.

[aurangzaibsiddiqui]

Hi there !

First of all, thanks a lot for this convenient library ! I started to use it for a hobby project of mine and it helped me to integrate Firebase Image without having to handle urls by manually so thanks for that 🙂

The project I'm working on is quite simple but I needed to make it work for the Web platform as well. I implemented a basic version of the FirebaseImageCacheManager that works with a simple Map structure in memory if sqflite library is not installed. Of course it comes with limitations (no persistence, no shared memory between tabs) but it's enough for my use-case. I created this PR in case it can help other people.

It is currently in draft mode, please tell me if you are interested in merging it. I have changed some naming and added an abstract class. I can adapt some code if required.

Hey! I am still a beginner in flutter so can really use your help! If your solution works, I will be extremely grateful!
So basically I am using the following version of firebase:
firebase_image: ^1.0.1

But as you would know it doesn't work on Web but works perfectly on iOS and Android. How can I use your solution in my app to fix that? Do I have to pull a repository? If yes, how to do it? Thanks in advance!