Add person editor

lib/editors/person.dart

@@ -0,0 +1,78 @@
+import 'package:flutter/material.dart';
+
+import '../backend.dart';
+import '../database.dart';
+
+class PersonEditor extends StatefulWidget {
+  final Person person;
+
+  PersonEditor({
+    this.person,
+  });
+
+  @override
+  _PersonEditorState createState() => _PersonEditorState();
+}
+
+class _PersonEditorState extends State<PersonEditor> {
+  final firstNameController = TextEditingController();
+  final lastNameController = TextEditingController();
+
+  @override
+  void initState() {
+    super.initState();
+
+    if (widget.person != null) {
+      firstNameController.text = widget.person.firstName;
+      lastNameController.text = widget.person.lastName;
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final backend = Backend.of(context);
+
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Person'),
+        actions: <Widget>[
+          FlatButton(
+            child: Text('DONE'),
+            onPressed: () async {
+              final person = Person(
+                id: widget.person?.id ?? generateId(),
+                firstName: firstNameController.text,
+                lastName: lastNameController.text,
+              );
+
+              await backend.db.updatePerson(person);
+              Navigator.pop(context, person);
+            },
+          ),
+        ],
+      ),
+      body: ListView(
+        children: <Widget>[
+          Padding(
+            padding: const EdgeInsets.all(16.0),
+            child: TextField(
+              controller: firstNameController,
+              decoration: InputDecoration(
+                labelText: 'First name',
+              ),
+            ),
+          ),
+          Padding(
+            padding: const EdgeInsets.all(16.0),
+            child: TextField(
+              controller: lastNameController,
+              decoration: InputDecoration(
+                labelText: 'Last name',
+              ),
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}