locality_social_cloud 1.4.0

Write social apps with Flutter. This code connects to the backend of Locality Social Cloud to provide realtime state synchronization across devices.

example/locality_social_cloud_example.dart

import 'dart:async';
import 'dart:math' as math;

import 'package:locality_social_cloud/api/locality_auth.dart';
import 'package:locality_social_cloud/api/cache.dart';
import 'package:locality_social_cloud/api/discover_users.dart';
import 'package:locality_social_cloud/api/geo_channel.dart';
import 'package:locality_social_cloud/api/locality_social_cloud.dart';
import 'package:locality_social_cloud/api/logged_in_user.dart';
import 'package:locality_social_cloud/api/message_repository.dart';
import 'package:locality_social_cloud/api/pub_sub.dart';
import 'package:locality_social_cloud/api/pubsub_supervisor.dart';
import 'package:locality_social_cloud/api/throttled_change_notifier.dart';
import 'package:locality_social_cloud/api/topic_auth.dart';
import 'package:locality_social_cloud/api/locality_event.dart';
import 'package:m511chacha20/chacha20_key.dart';
import 'package:sqflite_common_ffi/sqflite_ffi.dart';
import 'package:uuid/uuid.dart';


class GlobalClickCounter extends ThrottledChangeNotifier with PubSub {
  int counter = 0;

  /// This is a global click counter. All users can increase the click counter. All users see the same click counter.
  @override
  String getTopic() {
    return 'global-click-counter';
  }

  void increaseCounterByOne() {
    send('increaseCounter', {
      'amount': 1
    });
  }

  @override
  void onReceive(LocalityEvent localityEvent) {
    switch(localityEvent.event) {
      case 'increaseCounter':
        counter += localityEvent.payload['amount'] as int;
        print("CLICK COUNTER IS AT $counter");
        notifyListeners();
        break;
    }
  }
}

void main() async
{
  LocalitySocialCloud.configure(appId: 'YOUR APP ID', appSecret: 'YOUR APP SECRET');
  LoggedInUserOrError loggedInUserOrError = await LocalityAuth.login("test_user_locality", "pwd");

  // Used to set up SQLite on Windows
  databaseFactory = databaseFactoryFfi;
  sqfliteFfiInit();

  PubSubSupervisor.cache = Cache(await MessageRepository.getInstance());

  if ( loggedInUserOrError.isError() ) {
    throw Exception("Could not connect to the Locality Social Cloud");
  }

  LocalitySocialCloud.connect(loggedInUserOrError.getUser());

  GlobalClickCounter exampleController = GlobalClickCounter();

  LocalitySocialCloud.supervise(exampleController, key: ChaCha20Key.fromString('example-key'));

  exampleController.timeline.whenSynchronized((){
    print("NOW SYNCHRONIZED");
    print("CLICK COUNTER: ${exampleController.counter}");
  });

  exampleController.addListener(() {
    print("EXAMPLE CONTROLLER WAS CLICKED. Throttled Provider ensures listeners are max notified at 120 fps for state updates.");
    print("Example click counter: ${exampleController.counter}");
  });

  for(int i = 0; i < 12; i++) {
    exampleController.increaseCounterByOne();
  }

  DiscoverUsers discoverUsers = LocalitySocialCloud.discoverUsers();

  discoverUsers.addListener(() {
    print("WE DISCOVERED SOME USERS!");
    for (var user in discoverUsers.discoveredUsers) {
      print("WE DISCOVERED: ${user.id}");
    }
  });

  discoverUsers.startingWith('Maltii');

  // Ensure the code has enough time to run
  await Future.delayed(Duration(milliseconds: 3000));
}

void geoChannelExample() {
  GeoChannel geoIndex = GeoChannel('nearby-people', metadata: "Hello!!");
  geoIndex.connect(PubSubSupervisor.supervisor);

  Timer.periodic(Duration(milliseconds: 1000), (timer) {
    double randomLatitude = 90.7128+math.Random().nextDouble()*10;
    double randomLongitude = -74.0060+math.Random().nextDouble()*10;

    geoIndex.putGeoEntity(
        Uuid().v1(), {},
        latitude: randomLatitude,
        longitude: randomLongitude,
        lifetimeSeconds: 30
    );

    geoIndex.getNearbyEntities(90.7128, -74.0060, 6).then((value){
      print(value.toString());
    });
  });
}


void authTopicExample(LoggedInUser loggedInUser) async
{
  TopicAuth topicAuth = LocalitySocialCloud.loadTopicAuths(loggedInUser);
  topicAuth.secureChannel(
      channel: 'globally-unique-topic-id',
      secret: 'generated_secret_password',
      metadata: {
        'img': 'https://.....jpg',
        'groupname': 'New Chatgroup',
        'role': 'Administrator'
      }
  );
  topicAuth.addListener(() {
    print("LISTING ALL SECURE CHANNELS: ");
    for (var element in topicAuth.secureChannels) {
      print("SECURE CHANNEL $element");
    }
  });
}