Can sign in user

lib/ui/routes/home_route.dart

@@ -0,0 +1,12 @@
+import 'package:flutter/material.dart';
+
+/// Main route of the application
+///
+/// @author Pierre HUBERT
+
+class HomeRoute extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Text("Home route");
+  }
+}

lib/ui/routes/login_route.dart

@@ -0,0 +1,123 @@
+import 'package:comunic/helpers/account_helper.dart';
+import 'package:comunic/models/authentication_details.dart';
+import 'package:comunic/ui/routes/home_route.dart';
+import 'package:comunic/utils/input_utils.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:comunic/utils/ui_utils.dart';
+import 'package:flutter/material.dart';
+
+/// Login route
+///
+/// @author Pierre HUBERT
+
+class LoginRoute extends StatefulWidget {
+  @override
+  State<StatefulWidget> createState() => _LoginRouteState();
+}
+
+class _LoginRouteState extends State<LoginRoute> {
+  String _currEmail;
+  String _currPassword;
+  AuthResult _authResult;
+
+  @override
+  void initState() {
+    super.initState();
+    _currEmail = "";
+    _currPassword = "";
+  }
+
+  void _emailChanged(String newEmail) {
+    setState(() {
+      _currEmail = newEmail;
+    });
+  }
+
+  void _passwordChanged(String newValue) {
+    setState(() {
+      _currPassword = newValue;
+    });
+  }
+
+  /// Call this whenever the user request to perform login
+  Future<void> _submitForm(BuildContext context) async {
+    final loginResult = await AccountHelper().signIn(
+        AuthenticationDetails(email: _currEmail, password: _currPassword));
+
+    if (loginResult == AuthResult.SUCCESS)
+      Navigator.pushReplacement(
+          context, MaterialPageRoute(builder: (b) => HomeRoute()));
+    else
+      setState(() {
+        _authResult = loginResult;
+      });
+  }
+
+  // Build error card
+  Widget _buildErrorCard() {
+    if (_authResult == null)
+      return null;
+
+    //Determine the right message
+    final message = (_authResult == AuthResult.INVALID_CREDENTIALS ? tr(
+        "Invalid credentials!") : (_authResult == AuthResult.TOO_MANY_ATTEMPTS
+        ? tr("Too many unsuccessfull login attempts! Please try again later...")
+        : tr("A network error occured!")));
+
+    return buildErrorCard(message);
+  }
+
+  /// Build login form
+  Widget _buildLoginForm() {
+    return SingleChildScrollView(
+      child: Padding(
+        padding: const EdgeInsets.all(8.0),
+        child: Column(
+          children: <Widget>[
+            Text(tr("Please sign into your Comunic account: ")),
+            Container(
+              child: _buildErrorCard(),
+            ),
+            //Email address
+            TextField(
+              keyboardType: TextInputType.emailAddress,
+              decoration: InputDecoration(
+                  labelText: tr("Email address"),
+                  alignLabelWithHint: true,
+                  errorText: _currEmail.length > 0 && !validateEmail(_currEmail)
+                      ? tr("Invalid email address!")
+                      : null),
+              onChanged: _emailChanged,
+            ),
+
+            //Password
+            TextField(
+              obscureText: true,
+              decoration: InputDecoration(
+                labelText: tr("Password"),
+                alignLabelWithHint: true,
+              ),
+              onChanged: _passwordChanged,
+            ),
+
+            RaisedButton(
+              child: Text(tr("Sign in")),
+              onPressed: !validateEmail(_currEmail) || _currPassword.length < 3
+                  ? null
+                  : () => _submitForm(context),
+            )
+          ],
+        ),
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+        appBar: AppBar(
+          title: Text("Comunic"),
+        ),
+        body: _buildLoginForm());
+  }
+}