flutter_app/lib/main.dart

import 'dart:ffi';
import 'package:ffi/ffi.dart';
import 'package:flutter/material.dart';
import 'dart:io' show Platform;
import 'package:path/path.dart' as path;
import 'model.dart' as model;
import 'dart:collection';
import 'dart:convert';
import 'package:flutter/material.dart';

typedef start_cwtch_function = Void Function(Pointer<Utf8> str, Int32 length);
typedef StartCwtchFn = void Function(Pointer<Utf8> dir, int len);

typedef access_cwtch_eventbus_function = Void Function();
typedef NextEventFn = void Function();


typedef get_json_blob_void_function = Pointer<Utf8> Function();
typedef GetJsonBlobVoidFn = Pointer<Utf8> Function();

typedef get_json_blob_string_function = Pointer<Utf8> Function(Pointer<Utf8> str, Int32 length);
typedef GetJsonBlobStringFn = Pointer<Utf8> Function(Pointer<Utf8> str,int len);


class ProfileModel {
  String onion;
  String nickname;
  String creationDate;
  HashMap<String, ContactModel> contacts;
}

class ContactModel {
  String onion;
  String nickname;
  bool isGroup;
  bool isBlocked;
  String status;
  List<MessageModel> messages;

  ContactModel({this.onion, this.nickname, this.status});

}

class MessageModel {
  String from;
  String message;
  String timestamp;
}


void main() => runApp(MyApp());


class MyApp extends StatelessWidget {
  // This widget is the root of your application.

  @override
  Widget build(BuildContext context) {

    var library = DynamicLibrary.open("libCwtch.so");

    var startCwtchC = library.lookup<NativeFunction<start_cwtch_function>>("StartCwtch");
    final StartCwtch = startCwtchC.asFunction<StartCwtchFn>();

    var cwtchDir = "/home/sarah/.cwtch/dev/";
    StartCwtch(Utf8.toUtf8(cwtchDir), cwtchDir.length);


    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
        // This makes the visual density adapt to the platform that you run
        // the app on. For desktop platforms, the controls will be smaller and
        // closer together (more dense) than on mobile platforms.
        visualDensity: VisualDensity.adaptivePlatformDensity,
        primaryColor: Color(0xFF4B3557),
        canvasColor: Color(0xFFB09CBC),
        accentColor: Color(0xFFD01972),
      ),
      home:RandomWords(title: 'Cwtch App', library:library, appStatus: model.AppModel(library: library)),
    );
  }
}


class RandomWords extends StatefulWidget {

  RandomWords({Key key, this.title, this.library, this.appStatus}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;
  final DynamicLibrary library;
  final model.AppModel appStatus;

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

class _RandomWordsState extends State<RandomWords> {
  HashMap<String, ProfileModel> _profiles;
  String currentlySelectedProfile = "";
  String currentlySelectedConversation = "";

  // example stuff
  final TextStyle _biggerFont = const TextStyle(fontSize: 18);


  @override
  Widget build(BuildContext context) {

    if (_profiles == null) {
      _profiles = new HashMap<String, ProfileModel>();
    }

    if (_profiles.length < 1) {

      var getProfilesC = widget.library.lookup<NativeFunction<get_json_blob_void_function>>("GetProfiles");
      final GetProfiles = getProfilesC.asFunction<GetJsonBlobVoidFn>();



      Pointer<Utf8> jsonProfilesBytes = GetProfiles();
      String jsonProfiles = Utf8.fromUtf8(jsonProfilesBytes);
      print(jsonProfiles);

      Map<String, dynamic> profiles = jsonDecode(jsonProfiles);

      profiles.forEach((onion,nick) {
        ProfileModel profile1 = new ProfileModel();
          profile1.onion = onion;
          profile1.nickname = nick;
          profile1.creationDate = "4 jan 2020";

        profile1.contacts = new HashMap<String, ContactModel>();




          _profiles.putIfAbsent(profile1.onion, () => profile1);
      });

      // ProfileModel profile1 = new ProfileModel();
      // profile1.onion = "xyzonion";
      // profile1.nickname = "Erinn";
      // profile1.creationDate = "4 jan 2020";
      // profile1.contacts = new HashMap<String, ContactModel>();
      // ProfileModel profile2 = new ProfileModel();
      // profile2.onion = "baphonion";
      // profile2.nickname = "Baphomet";
      // profile2.creationDate = "6 jan 2020";
      // profile2.contacts = new HashMap<String, ContactModel>();
      //
      // ContactModel contactErinn = new ContactModel();
      // contactErinn.onion = profile1.onion;
      // contactErinn.nickname = profile1.nickname;
      // MessageModel m0 = new MessageModel();
      // m0.from = contactErinn.onion;
      // m0.message = "hello baphomet!!";
      // m0.timestamp = "7 jan 2020";
      // MessageModel m1 = new MessageModel();
      // m1.from = profile2.onion;
      // m1.message = "well hi there! can't believe this worked!";
      // m1.timestamp = "7 jan 2020";
      // contactErinn.messages = <MessageModel>[];
      // contactErinn.messages.add(m0);
      // contactErinn.messages.add(m1);

      // profile2.contacts.putIfAbsent(contactErinn.onion, () => contactErinn);
      // _profiles.putIfAbsent(profile1.onion, () => profile1);
      // _profiles.putIfAbsent(profile2.onion, () => profile2);
    }

    return Scaffold (
      appBar: AppBar(
        title: Text('Profiles'),
        actions: [
          IconButton(icon: Icon(Icons.list)),
        ],
      ),
      body: _buildProfileManager(),//_buildSuggestions(),
    );
  }


  void _pushContactList() {
    Navigator.of(context).push(
      MaterialPageRoute<void>(
        builder: (BuildContext context) {
          return Scaffold(
            appBar: AppBar(
              title: Text('Contacts for ' + currentlySelectedProfile),
            ),
            body: _buildContactList(),
          );
        },
      ),
    );
  }

  Widget _buildContactList() {

    var getContactsC = widget.library.lookup<NativeFunction<get_json_blob_string_function>>("GetContacts");
    final GetContacts = getContactsC.asFunction<GetJsonBlobStringFn>();




    return StreamBuilder<String>(
        stream: widget.appStatus.contactEvents(),
        builder: (BuildContext context, AsyncSnapshot<String> snapshot) {



          Pointer<Utf8> jsonContactBytes = GetContacts(Utf8.toUtf8(currentlySelectedProfile), currentlySelectedProfile.length);
          String jsonContacts = Utf8.fromUtf8(jsonContactBytes);
          print(jsonContacts);
          List<dynamic> contacts = jsonDecode(jsonContacts);

          Map<String, ContactModel> _contacts = new HashMap<String, ContactModel>();
          contacts.forEach((onion) {
            _contacts.putIfAbsent(onion['onion'], () => ContactModel(onion: onion['onion'], nickname: onion['name'], status: onion['status']));
          });

          //  Map<String, ContactModel> _contacts = _profiles[currentlySelectedProfile].contacts;
          final tiles = _contacts.values.map(
                (ContactModel contact) {
              return ListTile(
                title: Text(
                  contact.nickname,
                  style: _biggerFont,
                ),
                subtitle: Text(contact.status),
                onTap: () {
                  setState(() {

                    currentlySelectedConversation = contact.onion;
                    _pushMessageView();
                  });
                },
              );
            },
          );

          final divided = ListTile.divideTiles(
            context: context,
            tiles: tiles,
          ).toList();

          return ListView(children: divided);
        },
      );
  }

  Widget _pushMessageView() {
    Navigator.of(context).push(
      MaterialPageRoute<void>(
        builder: (BuildContext context) {
          return Scaffold(
            appBar: AppBar(
              title: Text('Convo: ' + currentlySelectedConversation),
            ),
            body: _buildMessageView(),
          );
        },
      ),
    );
  }

  String getNick(String profile, String contact) {
    return contact == profile ? "me" : _profiles[profile].contacts[contact].nickname;
  }

  Widget _buildMessageView() {
    List<MessageModel> _contacts = _profiles[currentlySelectedProfile].contacts[currentlySelectedConversation].messages;
    final tiles = _contacts.map(
          (MessageModel m) {
        return ListTile(
          title: Text(
            getNick(currentlySelectedProfile, m.from),
          ),
          subtitle: Text(
            m.message,
            style: _biggerFont,
          ),
        );
      },
    );

    final divided = ListTile.divideTiles(
      context: context,
      tiles: tiles,
    ).toList();

    return ListView(children: divided);
  }

  Widget _buildProfileManager() {
    final tiles = _profiles.values.map(
          (ProfileModel profile) {
        return ListTile(
          title: Text(
            profile.nickname,
            style: _biggerFont,
          ),
          subtitle: Text(profile.onion),
          onTap: () {
            setState(() {

              var selectProfileC = widget.library.lookup<NativeFunction<get_json_blob_string_function>>("SelectProfile");
              final SelectProfile = selectProfileC.asFunction<GetJsonBlobStringFn>();

              SelectProfile(Utf8.toUtf8(profile.onion), profile.onion.length);

              currentlySelectedConversation = "";
              currentlySelectedProfile = profile.onion;
              _pushContactList();
            });
          },
        );
      },
    );

    final divided = ListTile.divideTiles(
      context: context,
      tiles: tiles,
    ).toList();

    return ListView(children: divided);
  }

}



class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title, this.library, this.appStatus}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;
  final DynamicLibrary library;
  final model.AppModel appStatus;

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


class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {


      var nextEventC = widget.library.lookup<NativeFunction<access_cwtch_eventbus_function>>("NextEvent");
      final NextEvent = nextEventC.asFunction<NextEventFn>();


      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      NextEvent();
      _counter = 1;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            StreamBuilder<String>(
            stream: widget.appStatus.torStatus(),
            builder: (BuildContext context, AsyncSnapshot<String> snapshot) {
              return Text(
                snapshot.hasData ?
                snapshot.data : "Tor not yet Connected",
                style: Theme
                    .of(context)
                    .textTheme
                    .headline4,
              );
            },
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}