Cache remote configurations

[glazrtom]

While having the upcoming custom remote configurations (#164) it would be maybe nice to have the configurations cached (for any type of the gitmoji source) in case the user is offline (or some kind of network error occurs).

Proposal:

• When the configuration is selected, the downloaded configuration is cached to persistent storage
• When the network fetch fails, it will try to use last cached version of the emojis (for the selected source type)
• If the source type will change, the previous cached emojis will stay cached, but will not be updated until this source type is selected (basically only the active source type will be updated with each start up). This will ensure that if the user changes the source type offline, he will still get the last downloaded set of emojis. This is kind of edge case, but will not be hard to implement so why not.
• We could also show some info about the cache in the settings. I can think of:
  • Last cache update for the given source type
  • Reset button, that will erase the whole cache for all the source types.
  • Refetch button for the current configuration

[patou]

Yes, it's a good idea, but do you have an idea where to save this cache on the disk?

The cache filename must contain the full url of the cache maybe by replace some characters like /

[patou]

#13 Related issue

[glazrtom]

For this state persisting could be used: https://plugins.jetbrains.com/docs/intellij/persisting-state-of-components.html#defining-the-storage-location

To my understanding, the state can be saved either in project workspace or globally for ide. But I think for this the project specific should be enough.

Or better there is cache location, but I'm not sure how the project vs global location is decided. The documentation is not very verbose 😄

My idea would be to save object/map that will save the gitmoji json and localizations for given source type. So in the storage it will look like array of SourceType.ID -> gitmoji json and localization