[firebase_auth] implement missing auth functionality for web (flutter#1864)

* implement missing auth functionality for web

* add changelog

* bump pubspec version

* add missing method to changelog

* fix interface

Author: CDDelta

packages/firebase_auth/firebase_auth_web/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.2
+
+* Implement `fetchSignInMethodsForEmail`, `isSignInWithEmailLink`, `signInWithEmailAndLink`, and `sendLinkToEmail`. 
+
 ## 0.1.1+4
 
 * Prevent `null` users (unauthenticated) from breaking the `onAuthStateChanged` Stream.

packages/firebase_auth/firebase_auth_web/lib/firebase_auth_web.dart

@@ -147,10 +147,8 @@ class FirebaseAuthWeb extends FirebaseAuthPlatform {
 
   @override
   Future<List<String>> fetchSignInMethodsForEmail(String app, String email) {
-    // TODO(hterkelsen): Use `fetchSignInMethodsForEmail` once
-    // https://github.com/FirebaseExtended/firebase-dart/issues/272
-    // is resolved.
-    throw UnimplementedError('fetchSignInMethodsForEmail');
+    final firebase.Auth auth = _getAuth(app);
+    return auth.fetchSignInMethodsForEmail(email);
   }
 
   @override
@@ -162,8 +160,6 @@ class FirebaseAuthWeb extends FirebaseAuthPlatform {
 
   @override
   Future<PlatformIdTokenResult> getIdToken(String app, bool refresh) async {
-    // TODO(hterkelsen): `package:firebase` added `getIdTokenResult` in
-    // version 7.0.0. Use it here once that is published.
     final firebase.Auth auth = _getAuth(app);
     final firebase.User currentUser = auth.currentUser;
     final firebase.IdTokenResult idTokenResult =
@@ -173,10 +169,8 @@ class FirebaseAuthWeb extends FirebaseAuthPlatform {
 
   @override
   Future<bool> isSignInWithEmailLink(String app, String link) {
-    // TODO(hterkelsen): Implement this once
-    // https://github.com/FirebaseExtended/firebase-dart/issues/273
-    // is resolved.
-    throw UnimplementedError('isSignInWithEmailLink');
+    final firebase.Auth auth = _getAuth(app);
+    return Future.value(auth.isSignInWithEmailLink(link));
   }
 
   @override
@@ -232,9 +226,20 @@ class FirebaseAuthWeb extends FirebaseAuthPlatform {
       String androidPackageName,
       bool androidInstallIfNotAvailable,
       String androidMinimumVersion}) {
-    // TODO(hterkelsen): File issue with `package:firebase` to show
-    // `sendSignInLinkToEmail`.
-    throw UnimplementedError('sendLinkToEmail');
+    final firebase.Auth auth = _getAuth(app);
+    final actionCodeSettings = firebase.ActionCodeSettings(
+      url: url,
+      handleCodeInApp: handleCodeInApp,
+      iOS: firebase.IosSettings(
+        bundleId: iOSBundleID,
+      ),
+      android: firebase.AndroidSettings(
+        packageName: androidPackageName,
+        installApp: androidInstallIfNotAvailable,
+        minimumVersion: androidMinimumVersion,
+      ),
+    );
+    return auth.sendSignInLinkToEmail(email, actionCodeSettings);
   }
 
   @override
@@ -280,9 +285,10 @@ class FirebaseAuthWeb extends FirebaseAuthPlatform {
   @override
   Future<PlatformAuthResult> signInWithEmailAndLink(
       String app, String email, String link) async {
-    // TODO(hterkelsen): Use signInWithEmailLink once 7.0.0 of package:firebase
-    // is released.
-    throw UnimplementedError('signInWithEmailAndLink');
+    final firebase.Auth auth = _getAuth(app);
+    final firebase.UserCredential userCredential =
+        await auth.signInWithEmailLink(email, link);
+    return _fromJsUserCredential(userCredential);
   }
 
   @override

packages/firebase_auth/firebase_auth_web/pubspec.yaml

@@ -1,7 +1,7 @@
 name: firebase_auth_web
 description: The web implementation of firebase_auth
 homepage: https://github.com/FirebaseExtended/flutterfire/tree/master/packages/firebase_auth/firebase_auth_web
-version: 0.1.1+4
+version: 0.1.2
 
 flutter:
   plugin: