partial logon support

web/repertory/lib/screens/auth_screen.dart

@@ -0,0 +1,94 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:repertory/constants.dart' as constants;
+import 'package:repertory/models/auth.dart';
+
+class AuthScreen extends StatefulWidget {
+  final String title;
+  const AuthScreen({super.key, required this.title});
+
+  @override
+  State<AuthScreen> createState() => _AuthScreenState();
+}
+
+class _AuthScreenState extends State<AuthScreen> {
+  bool _enabled = true;
+  final _passwordController = TextEditingController();
+  final _userController = TextEditingController();
+
+  @override
+  Widget build(context) {
+    return Scaffold(
+      appBar: AppBar(
+        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
+        title: Text(widget.title),
+      ),
+      body: Consumer<Auth>(
+        builder: (context, auth, _) {
+          if (auth.authenticated) {
+            Navigator.of(context).pushReplacementNamed('/');
+            return SizedBox.shrink();
+          }
+
+          return Center(
+            child: Card(
+              child: Padding(
+                padding: const EdgeInsets.all(constants.padding),
+                child: SizedBox(
+                  width: 400,
+                  child: Column(
+                    mainAxisSize: MainAxisSize.min,
+                    mainAxisAlignment: MainAxisAlignment.start,
+                    crossAxisAlignment: CrossAxisAlignment.stretch,
+                    children: [
+                      Text(
+                        'Logon to Repertory Portal',
+                        textAlign: TextAlign.center,
+                        style: Theme.of(context).textTheme.titleLarge,
+                      ),
+                      const SizedBox(height: constants.padding),
+                      TextField(
+                        decoration: InputDecoration(labelText: 'Username'),
+                        controller: _userController,
+                      ),
+                      const SizedBox(height: constants.padding),
+                      TextField(
+                        obscureText: true,
+                        decoration: InputDecoration(labelText: 'Password'),
+                        controller: _passwordController,
+                      ),
+                      const SizedBox(height: constants.padding),
+                      ElevatedButton(
+                        onPressed:
+                            _enabled
+                                ? () async {
+                                  setState(() => _enabled = false);
+                                  await auth.authenticate(
+                                    _userController.text,
+                                    _passwordController.text,
+                                  );
+                                  setState(() => _enabled = true);
+                                }
+                                : null,
+                        child: const Text('Login'),
+                      ),
+                    ],
+                  ),
+                ),
+              ),
+            ),
+          );
+        },
+      ),
+    );
+  }
+
+  @override
+  void setState(VoidCallback fn) {
+    if (!mounted) {
+      return;
+    }
+
+    super.setState(fn);
+  }
+}