cwtch-ui/lib/cwtch/gomobile.dart

import 'dart:convert';

import 'package:cwtch/config.dart';
import 'package:flutter/services.dart';
import 'package:path_provider/path_provider.dart';
import 'dart:async';
import 'package:path/path.dart' as path;

import 'cwtch.dart';
import 'cwtchNotifier.dart';

/*
TODO: make a reusable plugin for other flutter apps

import 'package:federated_plugin_platform_interface/federated_plugin_platform_interface.dart';

/// It uses [FederatedPluginInterface]
Future startCwtch() async {
  return await FederatedPluginInterface.instance.startCwtch();
}
 */

class CwtchGomobile implements Cwtch {
  static const appInfoPlatform = const MethodChannel('test.flutter.dev/applicationInfo');
  static const cwtchPlatform = const MethodChannel('cwtch');

  final appbusEventChannelName = 'test.flutter.dev/eventBus';

  late Future<dynamic> androidLibraryDir;
  late Future<dynamic> androidHomeDirectory;
  late CwtchNotifier cwtchNotifier;

  CwtchGomobile(CwtchNotifier _cwtchNotifier) {
    print("gomobile.dart: CwtchGomobile()");
    cwtchNotifier = _cwtchNotifier;
    androidHomeDirectory = getApplicationDocumentsDirectory();
    androidLibraryDir = appInfoPlatform.invokeMethod('getNativeLibDir');

    // Method channel to receive libcwtch-go events via Kotlin and dispatch them to _handleAppbusEvent (sends to cwtchNotifier)
    final appbusEventChannel = MethodChannel(appbusEventChannelName);
    appbusEventChannel.setMethodCallHandler(this._handleAppbusEvent);
  }

  // ignore: non_constant_identifier_names
  Future<void> Start() async {
    print("gomobile.dart: Start()...");
    var cwtchDir = path.join((await androidHomeDirectory).path, ".cwtch");
    if (EnvironmentConfig.BUILD_VER == dev_version) {
      cwtchDir = path.join(cwtchDir, "dev");
    }
    String torPath = path.join(await androidLibraryDir, "libtor.so");
    print("gomobile.dart: Start invokeMethod Start($cwtchDir, $torPath)...");
    return cwtchPlatform.invokeMethod("Start", {"appDir": cwtchDir, "torPath": torPath});
  }

  @override
  // ignore: non_constant_identifier_names
  Future<void> ReconnectCwtchForeground() async {
    cwtchPlatform.invokeMethod("ReconnectCwtchForeground", {});
  }

  // Handle libcwtch-go events (received via kotlin) and dispatch to the cwtchNotifier
  Future<void> _handleAppbusEvent(MethodCall call) async {
    final String json = call.arguments;
    var obj = jsonDecode(json);
    cwtchNotifier.handleMessage(call.method, obj);
  }

  // ignore: non_constant_identifier_names
  void SelectProfile(String onion) {
    cwtchPlatform.invokeMethod("SelectProfile", {"profile": onion});
  }

  // ignore: non_constant_identifier_names
  void CreateProfile(String nick, String pass) {
    cwtchPlatform.invokeMethod("CreateProfile", {"nick": nick, "pass": pass});
  }

  // ignore: non_constant_identifier_names
  void LoadProfiles(String pass) {
    cwtchPlatform.invokeMethod("LoadProfiles", {"pass": pass});
  }

  // ignore: non_constant_identifier_names
  void DeleteProfile(String onion, String pass) {
    cwtchPlatform.invokeMethod("DeleteProfile", {"ProfileOnion": onion, "pass": pass});
  }

  // ignore: non_constant_identifier_names
  Future<dynamic> GetMessage(String profile, String handle, int index) {
    print("gomobile.dart GetMessage " + index.toString());
    return cwtchPlatform.invokeMethod("GetMessage", {"profile": profile, "contact": handle, "index": index});
  }

  @override
  // ignore: non_constant_identifier_names
  void SendProfileEvent(String onion, String jsonEvent) {
    cwtchPlatform.invokeMethod("SendProfileEvent", {"onion": onion, "jsonEvent": jsonEvent});
  }

  @override
  // ignore: non_constant_identifier_names
  void SendAppEvent(String jsonEvent) {
    cwtchPlatform.invokeMethod("SendAppEvent", {"jsonEvent": jsonEvent});
  }

  @override
  void dispose() => {};

  @override
  // ignore: non_constant_identifier_names
  void AcceptContact(String profileOnion, String contactHandle) {
    cwtchPlatform.invokeMethod("AcceptContact", {"ProfileOnion": profileOnion, "handle": contactHandle});
  }

  @override
  // ignore: non_constant_identifier_names
  void BlockContact(String profileOnion, String contactHandle) {
    cwtchPlatform.invokeMethod("BlockContact", {"ProfileOnion": profileOnion, "handle": contactHandle});
  }

  @override
  // ignore: non_constant_identifier_names
  void SendMessage(String profileOnion, String contactHandle, String message) {
    cwtchPlatform.invokeMethod("SendMessage", {"ProfileOnion": profileOnion, "handle": contactHandle, "message": message});
  }

  @override
  // ignore: non_constant_identifier_names
  void SendInvitation(String profileOnion, String contactHandle, String target) {
    cwtchPlatform.invokeMethod("SendInvitation", {"ProfileOnion": profileOnion, "handle": contactHandle, "target": target});
  }

  @override
  // ignore: non_constant_identifier_names
  void ResetTor() {
    cwtchPlatform.invokeMethod("ResetTor", {});
  }

  @override
  // ignore: non_constant_identifier_names
  void ImportBundle(String profileOnion, String bundle) {
    cwtchPlatform.invokeMethod("ImportBundle", {"ProfileOnion": profileOnion, "bundle": bundle});
  }

  @override
  // ignore: non_constant_identifier_names
  void SetGroupAttribute(String profileOnion, String groupHandle, String key, String value) {
    cwtchPlatform.invokeMethod("SetGroupAttribute", {"ProfileOnion": profileOnion, "groupHandle": groupHandle, "key": key, "value": value});
  }

  @override
  // ignore: non_constant_identifier_names
  void RejectInvite(String profileOnion, String groupHandle) {
    cwtchPlatform.invokeMethod("RejectInvite", {"ProfileOnion": profileOnion, "groupHandle": groupHandle});
  }

  @override
  void CreateGroup(String profileOnion, String server, String groupName) {
    cwtchPlatform.invokeMethod("CreateGroup", {"ProfileOnion": profileOnion, "server": server, "groupName": groupName});
  }

  @override
  // ignore: non_constant_identifier_names
  void LeaveGroup(String profileOnion, String groupHandle) {
    cwtchPlatform.invokeMethod("LeaveGroup", {"ProfileOnion": profileOnion, "groupHandle": groupHandle});
  }

  @override
  // ignore: non_constant_identifier_names
  void LeaveConversation(String profileOnion, String contactHandle) {
    cwtchPlatform.invokeMethod("LeaveConversation", {"ProfileOnion": profileOnion, "contactHandle": contactHandle});
  }

  @override
  void UpdateMessageFlags(String profile, String handle, int index, int flags) {
    print("gomobile.dart UpdateMessageFlags " + index.toString());
    cwtchPlatform.invokeMethod("UpdateMessageFlags", {"profile": profile, "contact": handle, "index": index, "flags": flags});
  }

  @override
  Future<void> Shutdown() async {
    print("gomobile.dart Shutdown");
    cwtchPlatform.invokeMethod("Shutdown", {});
  }
}