Fix: feat: firebase authentication guide #2

authentication/README.md

@@ -1,16 +1,73 @@
-# authentication
+# Flutter Firebase Authentication Setup Guide
 
-A new Flutter project.
+This guide will walk you through the steps to configure Firebase Authentication in your Flutter project.
 
-## Getting Started
+## Step 1: Enable Firebase Authentication
+1. Open the [Firebase Console](https://console.firebase.google.com/).
+2. Select your project or create a new one.
+3. In the Firebase Console, go to **Authentication** from the left-hand sidebar.
+4. Click on the **Get Started** button.
+5. Choose **Google** as a sign-in method and enable it.
+6. Click **Save** to apply the changes.
 
-This project is a starting point for a Flutter application.
+Here are the two tables with images as requested:
 
-A few resources to get you started if this is your first Flutter project:
+### Table 1: Firebase Console Setup (Step 1)
 
-- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
-- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
+| Step | Image |
+|------|-------|
+| 1. Go to Firebase Console and choose Authentication | <img src="media/step1.png" height="300"> |
+| 2. Click on "Get Started" to initialize the setup | ![](media/step1-2.png) |
 
-For help getting started with Flutter development, view the
-[online documentation](https://docs.flutter.dev/), which offers tutorials,
-samples, guidance on mobile development, and a full API reference.
+---
+
+### Table 2: Google Authentication Configuration
+
+| Step | Image |
+|------|-------|
+| 1. Enable Google Authentication in Firebase Console | ![](media/step2.png) |
+| 2. Enable it and save the settings | ![](media/step2-2.png) ![](media/step2-3.png) |
+
+## Step 2: Add Fingerprints for Android (Optional for Android apps)
+If you're configuring Firebase for Android, you need to add the correct fingerprints for your app:
+
+1. Open a terminal and run the following command to get your debug keystore fingerprint:
+
+```bash
+   keytool -list -v -keystore C:\Users\<your-username>\.android\debug.keystore -alias androiddebugkey -storepass android -keypass android
+```
+
+2. Go to **Project Settings** in the Firebase Console.
+
+3. Add the fingerprints you obtained from the command above.
+
+### Table 3: Add Fingerprints for Android
+
+| Action | Screenshot |
+|--------|-----------|
+| Go to Project Settings | ![](media/step3.png) |
+| Obtain Fingerprints Using Command | ![](media/step3-1.png) |
+| Add Fingerprints in Firebase | ![](media/step3-2.png)    ![](media/step3-3.png)|
+
+
+## Step 3: Add Firebase Configuration for Web (Optional for Web apps)
+
+If you're working on a web app, you need to configure the Firebase settings in your web project:
+
+1. Go to the Firebase Console and select your project.
+2. In **Project Settings**, under the **General** tab, find your Firebase web configuration.
+3. Follow the instructions to add the configuration to your `/web/index.html` file.
+
+### Add Configure for Web
+
+![](media/step4.png)
+
+## Step 4: Run Flutterfire Configure
+
+Once you’ve completed the setup in the Firebase Console, run the following command in your terminal to update your Flutter project with the latest Firebase configurations:
+
+```bash
+flutterfire configure
+```
+
+This will refresh your Flutter project to ensure the changes you made on the Firebase Console are reflected in your app.

authentication/analysis_options.yaml

@@ -7,6 +7,9 @@
 
 # The following line activates a set of recommended lints for Flutter apps,
 # packages, and plugins designed to encourage good coding practices.
+analyzer:
+  errors:
+    use_build_context_synchronously: ignore
 include: package:flutter_lints/flutter.yaml
 
 linter:

authentication/android/app/build.gradle

@@ -1,5 +1,8 @@
 plugins {
     id "com.android.application"
+    // START: FlutterFire Configuration
+    id 'com.google.gms.google-services'
+    // END: FlutterFire Configuration
     id "kotlin-android"
     // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id "dev.flutter.flutter-gradle-plugin"

authentication/android/settings.gradle

@@ -19,6 +19,9 @@ pluginManagement {
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
     id "com.android.application" version "8.1.0" apply false
+    // START: FlutterFire Configuration
+    id "com.google.gms.google-services" version "4.3.15" apply false
+    // END: FlutterFire Configuration
     id "org.jetbrains.kotlin.android" version "1.8.22" apply false
 }
 

authentication/lib/main.dart

@@ -1,125 +1,21 @@
+import 'package:authentication/firebase_options.dart';
+import 'package:authentication/pages/login/login.dart';
+import 'package:firebase_core/firebase_core.dart';
 import 'package:flutter/material.dart';
 
-void main() {
+Future<void> main() async {
+  WidgetsFlutterBinding.ensureInitialized();
+
+  await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);
+
   runApp(const MyApp());
 }
 
 class MyApp extends StatelessWidget {
   const MyApp({super.key});
 
-  // This widget is the root of your application.
-  @override
-  Widget build(BuildContext context) {
-    return MaterialApp(
-      title: 'Flutter Demo',
-      theme: ThemeData(
-        // This is the theme of your application.
-        //
-        // TRY THIS: Try running your application with "flutter run". You'll see
-        // the application has a purple toolbar. Then, without quitting the app,
-        // try changing the seedColor in the colorScheme below to Colors.green
-        // and then invoke "hot reload" (save your changes or press the "hot
-        // reload" button in a Flutter-supported IDE, or press "r" if you used
-        // the command line to start the app).
-        //
-        // Notice that the counter didn't reset back to zero; the application
-        // state is not lost during the reload. To reset the state, use hot
-        // restart instead.
-        //
-        // This works for code too, not just values: Most code changes can be
-        // tested with just a hot reload.
-        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
-        useMaterial3: true,
-      ),
-      home: const MyHomePage(title: 'Flutter Demo Home Page'),
-    );
-  }
-}
-
-class MyHomePage extends StatefulWidget {
-  const MyHomePage({super.key, required this.title});
-
-  // This widget is the home page of your application. It is stateful, meaning
-  // that it has a State object (defined below) that contains fields that affect
-  // how it looks.
-
-  // This class is the configuration for the state. It holds the values (in this
-  // case the title) provided by the parent (in this case the App widget) and
-  // used by the build method of the State. Fields in a Widget subclass are
-  // always marked "final".
-
-  final String title;
-
-  @override
-  State<MyHomePage> createState() => _MyHomePageState();
-}
-
-class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
-
-  void _incrementCounter() {
-    setState(() {
-      // This call to setState tells the Flutter framework that something has
-      // changed in this State, which causes it to rerun the build method below
-      // so that the display can reflect the updated values. If we changed
-      // _counter without calling setState(), then the build method would not be
-      // called again, and so nothing would appear to happen.
-      _counter++;
-    });
-  }
-
   @override
   Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
-    // by the _incrementCounter method above.
-    //
-    // The Flutter framework has been optimized to make rerunning build methods
-    // fast, so that you can just rebuild anything that needs updating rather
-    // than having to individually change instances of widgets.
-    return Scaffold(
-      appBar: AppBar(
-        // TRY THIS: Try changing the color here to a specific color (to
-        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
-        // change color while the other colors stay the same.
-        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        // Here we take the value from the MyHomePage object that was created by
-        // the App.build method, and use it to set our appbar title.
-        title: Text(widget.title),
-      ),
-      body: Center(
-        // Center is a layout widget. It takes a single child and positions it
-        // in the middle of the parent.
-        child: Column(
-          // Column is also a layout widget. It takes a list of children and
-          // arranges them vertically. By default, it sizes itself to fit its
-          // children horizontally, and tries to be as tall as its parent.
-          //
-          // Column has various properties to control how it sizes itself and
-          // how it positions its children. Here we use mainAxisAlignment to
-          // center the children vertically; the main axis here is the vertical
-          // axis because Columns are vertical (the cross axis would be
-          // horizontal).
-          //
-          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
-          // action in the IDE, or press "p" in the console), to see the
-          // wireframe for each widget.
-          mainAxisAlignment: MainAxisAlignment.center,
-          children: <Widget>[
-            const Text(
-              'You have pushed the button this many times:',
-            ),
-            Text(
-              '$_counter',
-              style: Theme.of(context).textTheme.headlineMedium,
-            ),
-          ],
-        ),
-      ),
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: const Icon(Icons.add),
-      ), // This trailing comma makes auto-formatting nicer for build methods.
-    );
+    return MaterialApp(home: Login());
   }
 }

authentication/lib/pages/home/home.dart

@@ -0,0 +1,91 @@
+import 'package:authentication/services/auth_service.dart';
+import 'package:firebase_auth/firebase_auth.dart';
+import 'package:flutter/material.dart';
+
+class Home extends StatelessWidget {
+  const Home({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text(
+          "Flutter Firebase Authentication",
+          style: TextStyle(color: Colors.white, fontWeight: FontWeight.bold),
+        ),
+        centerTitle: true,
+        backgroundColor: Colors.amber[900],
+        elevation: 0,
+        toolbarHeight: 80,
+      ),
+      backgroundColor: Colors.white,
+      body: SafeArea(
+        child: Padding(
+          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 32),
+          child: Column(
+            mainAxisAlignment: MainAxisAlignment.center,
+            children: [
+              _buildWelcomeText(),
+              const SizedBox(height: 20),
+              _buildUserEmail(),
+              const SizedBox(height: 40),
+              _buildLogoutButton(context),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+
+  // Welcome text for the user
+  Widget _buildWelcomeText() {
+    return const Text(
+      'Welcome to Flutter Firebase Authentication Example',
+      textAlign: TextAlign.center,
+      style: TextStyle(
+        color: Colors.black,
+        fontWeight: FontWeight.bold,
+        fontSize: 24,
+      ),
+    );
+  }
+
+  // Display current user's email
+  Widget _buildUserEmail() {
+    return Text(
+      FirebaseAuth.instance.currentUser?.email ?? 'No email found',
+      textAlign: TextAlign.center,
+      style: const TextStyle(
+        color: Colors.black,
+        fontWeight: FontWeight.w500,
+        fontSize: 18,
+      ),
+    );
+  }
+
+  // Logout button with an attractive design
+  Widget _buildLogoutButton(BuildContext context) {
+    return ElevatedButton(
+      style: ElevatedButton.styleFrom(
+        backgroundColor: Colors.amber[900],
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(14),
+        ),
+        minimumSize: const Size(double.infinity, 60),
+        elevation: 5,
+        shadowColor: Colors.blue.withOpacity(0.3),
+      ),
+      onPressed: () async {
+        await AuthService().signout(context: context);
+      },
+      child: const Text(
+        "Sign Out",
+        style: TextStyle(
+          fontSize: 18,
+          fontWeight: FontWeight.w600,
+          color: Colors.white,
+        ),
+      ),
+    );
+  }
+}