Login/Register improvements

lib/helper.dart

@@ -1,4 +1,5 @@
 import 'package:collection/collection.dart';
+import 'package:flutter/material.dart';
 
 ///
 /// Compare two lists by their content ignoring their elements order.
@@ -27,3 +28,24 @@ String convertDecimalToDMS(double decimalValue) {
   // return formatted string
   return '${degrees.abs()}° ${minutes.abs()}\' ${seconds.abs()}" $direction';
 }
+
+///
+/// Show a simple message dialog
+///
+void showMsg(BuildContext context, String title, String content) {
+  showDialog(
+    context: context,
+    builder: (context) => AlertDialog(
+      title: Text(title),
+      content: Text(content),
+      actions: [
+        TextButton(
+          onPressed: () {
+            Navigator.of(context).pop();
+          },
+          child: const Text('OK'),
+        ),
+      ],
+    ),
+  );
+}

lib/pages/login_page.dart

@@ -1,7 +1,9 @@
+import 'package:firebase_auth/firebase_auth.dart';
 import 'package:flutter/material.dart';
-import 'package:cofounderella/services/auth/auth_service.dart';
+import '../components/my_button.dart';
-import 'package:cofounderella/components/my_button.dart';
+import '../components/my_textfield.dart';
-import 'package:cofounderella/components/my_textfield.dart';
+import '../helper.dart';
+import '../services/auth/auth_service.dart';
 
 class LoginPage extends StatelessWidget {
   //text controllers
@@ -15,24 +17,35 @@ class LoginPage extends StatelessWidget {
 
   // login method
   void login(BuildContext context) async {
+    if (_emailController.text.trim().isEmpty ||
+        _passwordController.text.trim().isEmpty) {
+      showMsg(
+        context,
+        'Missing information',
+        'Please enter your email and password',
+      );
+      return;
+    }
+
     // auth service
-    final authService = AuthService();
+    final auth = AuthService();
 
     // try login
     try {
-      await authService.signInWithEmailPassword(
+      await auth.signInWithEmailPassword(
         _emailController.text,
         _passwordController.text,
       );
-    } catch (e) {
+    } on FirebaseAuthException catch (e) {
-      showDialog(
+      if (context.mounted) {
-        context: context,
+        showMsg(
-        builder: (context) => AlertDialog(
+          context,
-          title: Text(e.toString()),
+          e.code.isNotEmpty ? e.code : 'Login error',
-        ),
+          '${e.message}',
         );
       }
     }
+  }
 
   @override
   Widget build(BuildContext context) {

lib/pages/register_page.dart

@@ -1,8 +1,9 @@
-import 'package:cofounderella/services/auth/auth_service.dart';
+import 'package:cofounderella/helper.dart';
 import 'package:flutter/material.dart';
-
+import 'package:firebase_auth/firebase_auth.dart';
 import '../components/my_button.dart';
 import '../components/my_textfield.dart';
+import '../services/auth/auth_service.dart';
 
 class RegisterPage extends StatelessWidget {
   //text controllers
@@ -18,32 +19,28 @@ class RegisterPage extends StatelessWidget {
   RegisterPage({super.key, required this.onTap});
 
   // register method
-  void register(BuildContext context) {
+  Future<void> register(BuildContext context) async {
     // get auth service
     final auth = AuthService();
 
     // check if passwords match
     if (_passwordController.text == _confirmPassController.text) {
       try {
-        auth.signUpWithEmailPassword(
+        await auth.signUpWithEmailPassword(
           _emailController.text,
           _passwordController.text,
         );
-      } catch (e) {
+      } on FirebaseAuthException catch (e) {
-        showDialog(
+        if (context.mounted) {
-          context: context,
+          showMsg(
-          builder: (context) => AlertDialog(
+            context,
-            title: Text(e.toString()),
+            e.code.isNotEmpty ? e.code : 'Registration error',
-          ),
+            '${e.message}',
           );
         }
+      }
     } else {
-      showDialog(
+      showMsg(context, 'Registration error', 'Passwords do not match!');
-        context: context,
-        builder: (context) => const AlertDialog(
-          title: Text("Passwords do not match!"),
-        ),
-      );
     }
   }
 
@@ -113,7 +110,19 @@ class RegisterPage extends StatelessWidget {
             //login button
             MyButton(
               text: "Register",
-              onTap: () => register(context),
+              onTap: () => {
+                if (_emailController.text.trim().isEmpty ||
+                    _passwordController.text.trim().isEmpty)
+                  {
+                    showMsg(
+                      context,
+                      'Missing information',
+                      'Please enter your name, email and password',
+                    )
+                  }
+                else
+                  {register(context)}
+              },
             ),
 
             const SizedBox(height: 25),

lib/services/auth/auth_service.dart

@@ -1,6 +1,6 @@
 import 'package:cloud_firestore/cloud_firestore.dart';
-import 'package:cofounderella/constants.dart';
 import 'package:firebase_auth/firebase_auth.dart';
+import '../../constants.dart';
 
 class AuthService {
   // instance of auth and firestore
@@ -12,7 +12,9 @@ class AuthService {
     return _auth.currentUser;
   }
 
-  // sign in
+  /// sign in (login)
+  ///
+  /// @throws FirebaseAuthException
   Future<UserCredential> signInWithEmailPassword(String email, password) async {
     try {
       UserCredential userCredential = await _auth.signInWithEmailAndPassword(
@@ -21,12 +23,14 @@ class AuthService {
       );
 
       return userCredential;
-    } on FirebaseAuthException catch (e) {
+    } on FirebaseAuthException {
-      throw Exception(e.code);
+      rethrow;
     }
   }
 
-  // sign up (register)
+  /// sign up (register)
+  ///
+  /// @throws FirebaseAuthException
   Future<UserCredential> signUpWithEmailPassword(String email, password) async {
     try {
       // create user
@@ -48,8 +52,8 @@ class AuthService {
       );
 
       return userCredential;
-    } on FirebaseAuthException catch (e) {
+    } on FirebaseAuthException {
-      throw Exception(e.code);
+      rethrow;
     }
   }