Added log in screen

FrontEnd/lib/screens/login.dart

+import 'package:flutter/gestures.dart';
+import 'package:flutter/material.dart';
+import 'package:govimithura/constants/user_types.dart';
+import 'package:govimithura/models/error_model.dart';
+import 'package:govimithura/providers/authentication_provider.dart';
+import 'package:govimithura/screens/admin_home.dart';
+import 'package:govimithura/screens/forget_password.dart';
+import 'package:govimithura/screens/register.dart';
+import 'package:govimithura/utils/loading_overlay.dart';
+import 'package:govimithura/utils/screen_size.dart';
+import 'package:govimithura/utils/utils.dart';
+import 'package:govimithura/widgets/utils/buttons/custom_elevated_button.dart';
+import 'package:govimithura/widgets/utils/common_widget.dart';
+import 'package:govimithura/widgets/utils/text_fields/primary_textfield.dart';
+import 'package:provider/provider.dart';
+
+import 'home.dart';
+
+class LoginScreen extends StatefulWidget {
+  const LoginScreen({super.key});
+
+  @override
+  State<LoginScreen> createState() => _LoginScreenState();
+}
+
+class _LoginScreenState extends State<LoginScreen> {
+  late AuthenticationProvider pAuthentication;
+  GlobalKey<FormState> loginFormKey = GlobalKey<FormState>();
+
+  @override
+  void initState() {
+    super.initState();
+    pAuthentication =
+        Provider.of<AuthenticationProvider>(context, listen: false);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: SingleChildScrollView(
+        child: SizedBox(
+          height: ScreenSize.height,
+          width: ScreenSize.width,
+          child: Form(
+            key: loginFormKey,
+            child: Column(
+              mainAxisSize: MainAxisSize.max,
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                Padding(
+                  padding: const EdgeInsets.symmetric(horizontal: 20),
+                  child: Column(
+                    children: [
+                      const LogoText(),
+                      spacingWidget(30, SpaceDirection.vertical),
+                      Text(
+                        'Welcome again to Govimithura',
+                        style: Theme.of(context).textTheme.titleLarge,
+                      ),
+                      spacingWidget(20, SpaceDirection.vertical),
+                      PrimaryTextField(
+                        hintText: "Enter your email",
+                        validator: (value) {
+                          if (value == null || value.isEmpty) {
+                            return 'Required';
+                          } else if (!(value.contains("@") &&
+                              value.contains("."))) {
+                            return 'Enter valid Email Address';
+                          }
+                          return null;
+                        },
+                        onChanged: (value) {
+                          pAuthentication.setEmail(value.trim());
+                        },
+                      ),
+                      spacingWidget(20, SpaceDirection.vertical),
+                      PrimaryTextField(
+                        isPassword: true,
+                        hintText: "Enter password",
+                        validator: (value) {
+                          if (value == null || value.isEmpty) {
+                            return 'Required';
+                          }
+                          return null;
+                        },
+                        onChanged: (value) {
+                          pAuthentication.setPassWord(value.trim());
+                        },
+                      ),
+                      spacingWidget(10, SpaceDirection.vertical),
+                      GestureDetector(
+                        onTap: () {
+                          Navigator.push(
+                            context,
+                            MaterialPageRoute(
+                              builder: (_) => const ForgetPasswordScreen(),
+                            ),
+                          );
+                        },
+                        child: const Align(
+                          alignment: Alignment.centerRight,
+                          child: Text(
+                            'Forgot Password?',
+                            style: TextStyle(
+                              fontSize: 15,
+                            ),
+                            textAlign: TextAlign.end,
+                          ),
+                        ),
+                      ),
+                      spacingWidget(20, SpaceDirection.vertical),
+                      CustomElevatedButton(
+                        text: "Login",
+                        onPressed: () async {
+                          if (loginFormKey.currentState!.validate()) {
+                            bool success = await LoadingOverlay.of(context)
+                                .during(pAuthentication.login());
+                            if (success) {
+                              if (mounted) {
+                                Navigator.pushReplacement(
+                                  context,
+                                  MaterialPageRoute(
+                                    builder: (_) =>
+                                        pAuthentication.authModel.userType ==
+                                                UserType.user
+                                            ? const Home()
+                                            : const AdminHome(),
+                                  ),
+                                );
+                              }
+                            } else {
+                              if (mounted) {
+                                Utils.showDialogBox(
+                                    context, ErrorModel.errorMessage);
+                              }
+                            }
+                          }
+                        },
+                      ),
+                      spacingWidget(20, SpaceDirection.vertical),
+                      RichText(
+                        text: TextSpan(
+                          text: "Don't have an account? ",
+                          style: Theme.of(context).textTheme.bodyLarge,
+                          children: [
+                            TextSpan(
+                              text: "Sign Up",
+                              style: Theme.of(context)
+                                  .textTheme
+                                  .bodyLarge
+                                  ?.copyWith(
+                                    color: Theme.of(context).primaryColor,
+                                  ),
+                              recognizer: TapGestureRecognizer()
+                                ..onTap = () {
+                                  Navigator.pushReplacement(
+                                    context,
+                                    MaterialPageRoute(
+                                      builder: (context) =>
+                                          const RegisterScreen(),
+                                    ),
+                                  );
+                                },
+                            ),
+                          ],
+                        ),
+                      )
+                    ],
+                  ),
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}