Sync of Review History

[MaxEtMoritz]

Describe the feature you'd like I would like to see the possibility to sync the review history across devices, e.g. via Google Drive. It would be nice if this could happen automatically, but being able to upload / download the raw json directly to / from Google Drive or other Cloud Storage Solutions would also be a good starting point.

Describe reasons NOT to add this feature

• as @MrJPGames mentioned in https://github.com/MrJPGames/WayFarerPlus/issues/142#issuecomment-614863244, he will not add online features at the moment.
• it would require a Google account to use (at least if it is done via Google Drive) and not all Wayfinders may have or want to use Google Accounts because you can also sign into Wayfarer with Facebook.

Describe reasons to add this feature

• It would make keeping the review history complete and in one place easier if you use different devices to review.
• It would provide an additional backup to prevent review history loss.
• If someone (like me) configured the browser to delete website storage and cookies after each session, Review History sync could provide a way to actually really use this feature.
• Overall it is more convenient than uploading the saved history before reviewing and downloading and saving it somewhere, where all devices used for reviewing have access, after completing the review session.

Additional context Similar to #142, but specifically for the review history. I don't expect this feature to come soon, but if you decide to implement sync, just don't forget about the Review History!

[ceruleanight]

I'd love this as I have a few different history files now. Even using google docs excel spreadsheet would be cool as well (like the wayfarer planning plugin for IITC)

[MrJPGames]

Sorry for not responding sooner! Nicely written issue :)

As you've said this is not something I plan on doing anytime soon, but it could eventually happen.

And as for the comment on #142 I will clarify that using an external online service, like google drive/dropbox/one drive etc. could work. It would depend on which APIs are available (and if they're free to use).

So if anyone feels like implementing such a sync feature, go ahead! There are some minor concerns about mass gathering of review histories, which is always possible, but the sync solution shouldn't make it trivial to do (we can discuss this in more detail)