Failover local file

[remy56k]

I have a working example for #23
If error (if WLG can not push QSO with success), the QSO is written in the specified file :

Import the resulting file with multiples QSO in the WaveLog web interface works fine.

Maybe we can improve/adapt GUI error messages when the QSO is logged in the file.

Test Ok on Ubuntu 22, cannot check on Windows atm.

[int2001]

Regarding the PR itself:

i think the Window needs a bit more height. Otherwise it looks crappy.

Generally:

I am still not a real friend of that feature. I like WavelogGate to be simple. Very simple. I've currently many support issues with it, because there are hams out there who are not able to use WSJT-X, FLRig and WLGate in that simple way. Thats sad for a technical hobby, but true. People will ask over and over about that "Failover ADIF File" where WSJT-X produces its own file which can easily be uploaded with dupe-check enabled.

tbh: i am not sure how to deal with your PR. You invested effort. The use-case is covered by WSJT-X itself. it brings more complexity into a small UI/Tool (For me no problem, but i am thinking about the normal, overwhelmed ham).
Open for ideas. Currently in my mind:

• expert version? (But where should we put it?)
• Commandline-switch for advanced features?
• Dropdown-Menu for those settings?

[int2001]

A few more things besides my considerations above(sorry!).
What about:

• checking if location exists? Otherwise the write would fail and the OP can't see it.
• a "folder-requester" modal where one can chose the path? (Should be doable with internal functions)

i learned from Wavelog itself: Everything needs to be bulletproof, because people are doing the wildest things...