Share invite links through AirDrop

[n8fr8]

We need to add "nearby" friend adding, and it seems like there is an easy API to do so, from iOS to iOS:
https://developer.apple.com/library/content/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/Inter-AppCommunication/Inter-AppCommunication.html

[tladesignz]

Example code from Apple:
https://developer.apple.com/library/content/samplecode/sc2273/Introduction/Intro.html

Doesn't look complicated. I expect 10 - 20 hours for this and #562.

[n8fr8]

Any thoughts about a custom URL Scheme? zomnb:// (Zom "nearby") or something like that?

[tladesignz]

Sounds just fine.

[tladesignz]

I suppose this should go here?

@N-Pex, could I have a short introduction, so I don't need to scratch my head about how all of this works together?

As I understand, these files play a role?

https://github.com/zom/Zom-iOS/blob/master/Zom/Zom/Classes/View%20Controllers/ZomNewBuddyViewController.swift

https://github.com/zom/Zom-iOS/blob/master/Zom/OTRResources/Interface/Base.lproj/AddBuddy.storyboard

[N-Pex]

@tladesignz Correct, there's also a similar ZomNewBuddyViewController used in Onboarding.storyboard. The UI contains a toolbar where you can add a fourth button, "AirDrop" or similar (just copy one ot the others). THEN the icon needs to be set (it's a character from the material icons font, have a look at ZomNewButtonViewController:44). Yes, it's overly complicated, but it's implemented this way because 1. we wanted to use icons from the font and 2. The strings must not be "attributed strings" with the icon included in the storyboards, because then the translation scripts would be confused...

[tladesignz]

Ok. So there already is the "Share" button, which opens the system's "share" menu. (See screenshot above).
This can already be used to send the link via AirDrop. To add another button "AirDrop" would be quite strange, UI-wise.

What we should do instead is described here:
https://stackoverflow.com/questions/1108693/is-it-possible-to-register-a-httpdomain-based-url-scheme-for-iphone-apps-like

If we want to send a specific iOS-Zom URI with its own scheme, instead, that could get quite confusing.

On the other hand: We will have a server roundtrip and there need to be changes on the server.

[tladesignz]

Currently, the link to share is like this:
https://zom.im/i/#dGxhQGhvbWUuem9tLmltP290cj1kOWI3ZWE4MTdiZTk3YzNmNzE5YjRiMGE5Mjk5OGQ1ZGQzZThhMGYx

Which in turn links to this:
xmpp:[email protected]?subscribe&otr-fingerprint=

2 things here:

1. It seems, the fingerprint is missing. Any issues on the server?
2. Should Zom register for the xmpp scheme? Would that be a good idea?

Now, let's see how many spambots want to become my friend. :-)

[tladesignz]

Actually, we already support AirDrop.
Additionally, this is supersed by #590.