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refactor(genericidp): move Firebase calls to ViewModel
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auth/app/src/main/java/com/google/firebase/quickstart/auth/kotlin/GenericIdpViewModel.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| package com.google.firebase.quickstart.auth.kotlin | ||
|
|
||
| import android.app.Activity | ||
| import android.util.Log | ||
| import androidx.lifecycle.ViewModel | ||
| import androidx.lifecycle.viewModelScope | ||
| import com.google.firebase.auth.FirebaseAuth | ||
| import com.google.firebase.auth.FirebaseUser | ||
| import com.google.firebase.auth.ktx.auth | ||
| import com.google.firebase.auth.ktx.oAuthProvider | ||
| import com.google.firebase.ktx.Firebase | ||
| import java.util.ArrayList | ||
| import kotlinx.coroutines.flow.MutableStateFlow | ||
| import kotlinx.coroutines.flow.StateFlow | ||
| import kotlinx.coroutines.flow.update | ||
| import kotlinx.coroutines.launch | ||
| import kotlinx.coroutines.tasks.await | ||
|
|
||
| class GenericIdpViewModel( | ||
| private val firebaseAuth: FirebaseAuth = Firebase.auth | ||
| ) : ViewModel() { | ||
| private val _uiState = MutableStateFlow(UiState()) | ||
| val uiState: StateFlow<UiState> = _uiState | ||
|
|
||
| data class UiState( | ||
| var status: String = "", | ||
| var detail: String? = null, | ||
| var isSignInVisible: Boolean = true, | ||
| val providerNames: List<String> = ArrayList(PROVIDER_MAP.keys) | ||
| ) | ||
|
|
||
| fun showSignedInUser() { | ||
| // Check if user is signed in (non-null) and update UI accordingly. | ||
| val firebaseUser = firebaseAuth.currentUser | ||
| updateUiState(firebaseUser) | ||
|
|
||
| // Look for a pending auth result | ||
| val pendingAuthResult = firebaseAuth.pendingAuthResult | ||
| if (pendingAuthResult != null) { | ||
| viewModelScope.launch { | ||
| try { | ||
| val authResult = pendingAuthResult.await() | ||
| Log.d(TAG, "checkPending:onSuccess:$authResult") | ||
| updateUiState(authResult.user) | ||
| } catch (e: Exception) { | ||
| Log.w(TAG, "checkPending:onFailure", e) | ||
| } | ||
| } | ||
| } else { | ||
| Log.d(TAG, "checkPending: null") | ||
| } | ||
| } | ||
|
|
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| fun signIn(activity: Activity, providerName: String) { | ||
| // Could add custom scopes here | ||
| val customScopes = listOf<String>() | ||
|
|
||
| // Examples of provider ID: apple.com (Apple), microsoft.com (Microsoft), yahoo.com (Yahoo) | ||
| val providerId = PROVIDER_MAP[providerName]!! | ||
|
|
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| val oAuthProvider = oAuthProvider(providerId) { | ||
| scopes = customScopes | ||
| } | ||
|
|
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| viewModelScope.launch { | ||
| try { | ||
| val authResult = firebaseAuth.startActivityForSignInWithProvider(activity, oAuthProvider).await() | ||
| Log.d(TAG, "activitySignIn:onSuccess:${authResult.user}") | ||
| updateUiState(authResult.user) | ||
| } catch (e: Exception) { | ||
| Log.w(TAG, "activitySignIn:onFailure", e) | ||
| // TODO(thatfiredev): Snackbar Sign in failed, see logs for details. | ||
| } | ||
| } | ||
| } | ||
|
|
||
| fun signOut() { | ||
| firebaseAuth.signOut() | ||
| updateUiState(null) | ||
| } | ||
|
|
||
| private fun updateUiState(user: FirebaseUser?) { | ||
| if (user != null) { | ||
| _uiState.update { currentUiState -> | ||
| currentUiState.copy( | ||
| status = "User: ${user.displayName} ${user.email}", | ||
| detail = "Firebase UID: ${user.uid}", | ||
| isSignInVisible = false | ||
| ) | ||
| } | ||
| } else { | ||
| _uiState.update { currentUiState -> | ||
| currentUiState.copy( | ||
| status = "Signed out", | ||
| detail = null, | ||
| isSignInVisible = true | ||
| ) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| companion object { | ||
| const val TAG = "GenericIdpViewModel" | ||
| private val PROVIDER_MAP = mapOf( | ||
| "Apple" to "apple.com", | ||
| "Microsoft" to "microsoft.com", | ||
| "Yahoo" to "yahoo.com", | ||
| "Twitter" to "twitter.com" | ||
| ) | ||
| } | ||
| } |