carp_webservices 1.1.1

Flutter API for accessing the CARP web services - authentication, file management, data points, and app-specific collections of documents.

example/lib/main.dart

import 'package:carp_mobile_sensing/carp_mobile_sensing.dart';
import 'package:flutter/material.dart';
import 'package:carp_webservices/carp_services/carp_services.dart';
import 'package:carp_webservices/carp_auth/carp_auth.dart';
import 'package:carp_core/carp_core.dart';

void main() {
  CarpMobileSensing.ensureInitialized();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'CARP Backend Demo',
      theme: ThemeData.light(),
      darkTheme: ThemeData.dark(),
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  void initState() {
    super.initState();
    bloc.init();
  }

  void dispose() {
    bloc.dispose();
    super.dispose();
  }

  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
          child: Column(
        mainAxisSize: MainAxisSize.min,
        children: <Widget>[
          Container(
            height: 80,
            width: 200,
            decoration: BoxDecoration(borderRadius: BorderRadius.circular(10)),
            child: TextButton.icon(
              onPressed: () => bloc.authenticate(
                context,
                username: '[e-mail]',
              ),
              icon: Icon(Icons.login),
              label: Text(
                'LOGIN',
                style: TextStyle(fontSize: 35),
              ),
            ),
          ),
          Container(
            height: 80,
            width: 400,
            decoration: BoxDecoration(borderRadius: BorderRadius.circular(10)),
            child: TextButton.icon(
              onPressed: () => bloc.getStudyInvitation(context),
              icon: Icon(Icons.mail),
              label: Text(
                'GET STUDY',
                style: TextStyle(fontSize: 35),
              ),
            ),
          ),
          StreamBuilder(
            stream: CarpService().authStateChanges,
            builder: (BuildContext context, AsyncSnapshot<AuthEvent> event) =>
                Padding(
                    padding: EdgeInsets.fromLTRB(10, 30, 10, 0),
                    child: Text(
                        'Authentication status: ${(CarpService().authenticated) ? 'Authenticated' : 'Not authenticated'}')),
          )
        ],
      )),
    );
  }
}

class AppBLoC {
  final String uri = "https://cans.cachet.dk/dev";
  ActiveParticipationInvitation? _invitation;
  String? get studyId => _invitation?.studyId;
  String? get studyDeploymentId => _invitation?.studyDeploymentId;

  CarpApp? _app;
  CarpApp? get app => _app;

  Future<void> init() async {
    _app = CarpApp(
      name: 'carp_backend_example_app',
      uri: Uri.parse(uri),
      oauth: OAuthEndPoint(clientID: 'carp', clientSecret: 'carp'),
    );

    CarpService().configure(app!);
  }

  void dispose() async {}

  Future<void> authenticate(BuildContext context, {String? username}) async =>
      await CarpService().authenticateWithDialog(
        context,
        username: username,
        allowClose: true,
      );

  Future<ActiveParticipationInvitation?> getStudyInvitation(
      BuildContext context) async {
    // configure a participant service based on the carp service already configured
    CarpParticipationService().configureFrom(CarpService());
    _invitation = await CarpParticipationService().getStudyInvitation(context);
    print('CARP Study Invitation: $_invitation');
    // check that the app has been updated to reflect the study id and deployment id
    print(
        'Study ID: ${app?.studyId}, Deployment ID: ${app?.studyDeploymentId}');
    return _invitation;
  }
}

final bloc = AppBLoC();