app/lib/repository/details/settings.dart

// Copyright 2019 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter_web/material.dart';

import '../models/github_authentication.dart' as github;

class SettingsPage extends StatelessWidget {
  const SettingsPage();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text('Settings'),
        ),
        body: const SettingsForm());
  }
}

class SettingsForm extends StatefulWidget {
  const SettingsForm();

  @override
  _SettingsFormState createState() => _SettingsFormState();
}

class _SettingsFormState extends State<SettingsForm> {
  TextEditingController _githubToken;
  final SnackBar _signInSnackBar = const SnackBar(content: Text('Signed in'));
  final SnackBar _signOutSnackBar = const SnackBar(content: Text('Signed out'));
  final GlobalKey<FormState> _githubFormKey = GlobalKey<FormState>();

  @override
  void initState() {
    _githubToken = TextEditingController();
    super.initState();
  }

  @override
  void dispose() {
    _githubToken.dispose();
    super.dispose();
  }

  @override
  void didChangeDependencies() {
    _githubToken.text = github.token;
    super.didChangeDependencies();
  }

  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
        child: Form(
      key: _githubFormKey,
      child: ListBody(
        children: <Widget>[
          const Padding(
            padding: EdgeInsets.all(16),
            child: Text('GitHub', style: TextStyle(fontSize: 28)),
          ),
          const Padding(
            padding: EdgeInsets.fromLTRB(16, 0, 16, 16),
            child: Text(
              'This authorization is used to increase the rate limits for requests to the GitHub API to provide more data to in the dashboard.'
              ' The access token can be generated by following the instructions at https://help.github.com/articles/creating-a-personal-access-token-for-the-command-line and allowing repo access.',
            ),
          ),
          Padding(
            padding: const EdgeInsets.fromLTRB(16, 0, 16, 16),
            child: TextFormField(
              enabled: !github.isSignedIn,
              decoration: const InputDecoration(
                  hasFloatingPlaceholder: true, labelText: 'Access token'),
              autocorrect: false,
              obscureText: true,
              controller: _githubToken,
              validator: (String value) => value.isEmpty ? 'Required' : null,
            ),
          ),
          Center(
            child: RaisedButton(
              child: github.isSignedIn
                  ? const Text('Clear')
                  : const Text('Update'),
              onPressed: github.isSignedIn ? _handleSignOut : _handleSignIn,
            ),
          ),
        ],
      ),
    ));
  }

  void _handleSignIn() {
    if (_githubFormKey.currentState.validate()) {
      setState(() {
        github.token = _githubToken.value.text;
        Scaffold.of(context).showSnackBar(_signInSnackBar);
      });
    }
  }

  void _handleSignOut() {
    setState(() {
      _githubToken.clear();
      github.signOut();
      Scaffold.of(context).showSnackBar(_signOutSnackBar);
    });
  }
}