Envelope/mobile/lib/database/models/conversation_users.dart

import 'dart:convert';
import 'dart:typed_data';

import 'package:pointycastle/impl.dart';

import '/utils/encryption/aes_helper.dart';
import '/utils/encryption/crypto_utils.dart';

class ConversationUser {
  String id;
  String userId;
  String conversationId;
  String username;
  String associationKey;
  RSAPublicKey publicKey;
  bool admin;
  ConversationUser({
    required this.id,
    required this.userId,
    required this.conversationId,
    required this.username,
    required this.associationKey,
    required this.publicKey,
    required this.admin,
  });

  factory ConversationUser.fromJson(Map<String, dynamic> json, Uint8List symmetricKey) {

    String userId = AesHelper.aesDecrypt(
      symmetricKey,
      base64.decode(json['user_id']),
    );

    String username = AesHelper.aesDecrypt(
      symmetricKey,
      base64.decode(json['username']),
    );

    String associationKey = AesHelper.aesDecrypt(
      symmetricKey,
      base64.decode(json['association_key']),
    );

    String admin = AesHelper.aesDecrypt(
      symmetricKey,
      base64.decode(json['admin']),
    );

    String publicKeyString = AesHelper.aesDecrypt(
      symmetricKey,
      base64.decode(json['public_key']),
    );

    RSAPublicKey publicKey = CryptoUtils.rsaPublicKeyFromPem(publicKeyString);

    return ConversationUser(
      id: json['id'],
      conversationId: json['conversation_detail_id'],
      userId: userId,
      username: username,
      associationKey: associationKey,
      publicKey: publicKey,
      admin: admin == 'true',
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'id': id,
      'user_id': userId,
      'username': username,
      'association_key': associationKey,
      'asymmetric_public_key': publicKeyPem(),
      'admin': admin ? 'true' : 'false',
    };
  }

  Map<String, dynamic> toMap() {
    return {
      'id': id,
      'user_id': userId,
      'conversation_id': conversationId,
      'username': username,
      'association_key': associationKey,
      'asymmetric_public_key': publicKeyPem(),
      'admin': admin ? 1 : 0,
    };
  }

  String publicKeyPem() {
    return CryptoUtils.encodeRSAPublicKeyToPem(publicKey);
  }
}