Get phone number from FUIPhoneAuth instance

[willbattel]

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Step 2: Describe your environment

• Objective C or Swift: Swift
• iOS version: >=11.1
• Firebase SDK version: 6.18.0
• FirebaseUI version: 8.4.2
• CocoaPods Version: 1.9.1

Step 3: Describe the problem:

We're using FUI for phone authentication. In the event on a merge conflict, where we do not get an AuthDataResult, I want to retrieve the phone number that the user provided from within the authUI(_:didSignInWith:error:) delegate function (before we do signIn, where we would then be able to get it directly from FIRAuth). What I think would make the most sense would be to add it as a property on the FUIPhoneAuth class similar to how we can get the email with authUI.providers.first?.email?(). Would this change be feasible?

[willbattel]

Hey @morganchen12 could I get your thoughts on this as a short-term solution to #851? I know it will be some time before 851 can be implemented, so as a workaround I'd like to get the phone number to do a Firestore lookup for finding the UID manually. As far as I can tell, there isn't a way for us to intercept the phone number provided by the user in the FUI flow.

[morganchen12]

The best way to do that would be to fork FirebaseUI, add the workaround there, and point your CocoaPods installation to your fork.

[willbattel]

Regardless of my use case, would it not make sense to expose a phoneNumber property on the FUIPhoneAuth class? It already has an email property- so it seems like providing the phone number would make sense. Is this thought misguided?

[morganchen12]

That thought makes sense. User identifiers (like phone/email) should be attached to the specific providers for those identifiers.