Envelope/mobile/lib/utils/storage/friends.dart

import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:pointycastle/export.dart';
import 'package:sqflite/sqflite.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';
import '/models/friends.dart';
import '/utils/storage/database.dart';
import '/utils/storage/encryption_keys.dart';
import '/utils/storage/session_cookie.dart';
import '/utils/encryption/aes_helper.dart';

Future<void> updateFriends() async {
  RSAPrivateKey privKey = await getPrivateKey();

  try {
    var resp = await http.get(
        Uri.parse('${dotenv.env["SERVER_URL"]}api/v1/auth/friend_requests'),
        headers: {
          'cookie': await getSessionCookie(),
        }
    );

    if (resp.statusCode != 200) {
      throw Exception(resp.body);
    }

    List<Friend> friends = [];
    List<String> friendIds = [];

    List<dynamic> friendsRequestJson = jsonDecode(resp.body);

    for (var i = 0; i < friendsRequestJson.length; i++) {
      friends.add(
          Friend.fromJson(
              friendsRequestJson[i] as Map<String, dynamic>,
              privKey,
          )
      );

      friendIds.add(friends[i].friendId);
    }

    Map<String, String> params = {};
    params['friend_ids'] = friendIds.join(',');
    var uri = Uri.parse('${dotenv.env["SERVER_URL"]}api/v1/auth/friends');
    uri = uri.replace(queryParameters: params);

    resp = await http.get(
        uri,
        headers: {
          'cookie': await getSessionCookie(),
        }
    );

    if (resp.statusCode != 200) {
      throw Exception(resp.body);
    }

    final db = await getDatabaseConnection();

    List<dynamic> friendsJson = jsonDecode(resp.body);
    for (var i = 0; i < friendsJson.length; i++) {
      var friendJson = friendsJson[i] as Map<String, dynamic>;
      var friend = findFriendByFriendId(friends, friendJson['id']);

      friend.username = AesHelper.aesDecrypt(
          base64.decode(friend.friendSymmetricKey),
          base64.decode(friendJson['username']),
      );

      friend.asymmetricPublicKey = friendJson['asymmetric_public_key'];

      await db.insert(
          'friends',
          friend.toMap(),
          conflictAlgorithm: ConflictAlgorithm.replace,
      );
    }

  } catch (SocketException) {
    return;
  }
}