Use last known location if GPS fails to sync

[HaramanJohal]

There's a few things I'm not yet sure about so I'm happy to discuss and make corrections here

1. How do I check that my functionality is working? At the moment when using the expo app it seems not to remember the last known location but I'm not sure if that's just because it is starting from scratch every time I load it
2. Is this a reasonable way to implement the functionality?

Closes: #727

[CLAassistant]

All committers have signed the CLA.

[amaury1093]

Thanks a lot, this looks like a great start!

I added some comments on how to better fit the fp-ts model this project is using, would recommend to look at their docs too! https://gcanti.github.io/fp-ts/

About how to test, I would recommend to:

• remove the Location permission from the Expo app
• when the app launches, deny the location permission
• the piece of code you're modifying will then be called (you can put some console.logs while debugging)

[HaramanJohal]

I took your suggestions to make some changes and on my phone the functionality seems to behave as expected. Happy to make further adjustments

[amaury1093]

This looks good at 1st glance! I'll also test on my phone.

[amaury1093]

Hey! Could you merge master into your branch? I believe the failing test is related to that.

git pull origin master should do, assuming origin is set to this repo.

Otherwise, I tested on my phone, it works well! Great job!

[amaury1093]

Thanks again, @HaramanJohal!

[HaramanJohal]

No problem @amaurymartiny thanks for teaching me something about functional typescript