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222 lines
6.4 KiB
222 lines
6.4 KiB
import 'dart:convert';
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import 'dart:io';
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import 'dart:typed_data';
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import 'package:Envelope/database/repositories/friends_repository.dart';
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import 'package:mime/mime.dart';
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import 'package:pointycastle/export.dart';
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import 'package:uuid/uuid.dart';
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import '/database/repositories/conversation_users_repository.dart';
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import '/database/models/messages.dart';
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import '/database/models/text_messages.dart';
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import '/database/models/conversation_users.dart';
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import '/database/models/friends.dart';
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import '/database/models/my_profile.dart';
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import '/utils/encryption/aes_helper.dart';
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import '/utils/encryption/crypto_utils.dart';
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import '/utils/storage/database.dart';
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import '/utils/storage/write_file.dart';
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enum ConversationStatus {
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complete,
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pending,
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error,
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}
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class Conversation {
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String id;
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String userId;
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String symmetricKey;
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bool admin;
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String name;
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bool twoUser;
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ConversationStatus status;
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bool isRead;
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String messageExpiryDefault = 'no_expiry';
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bool adminAddMembers = true;
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bool adminEditInfo = true;
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bool adminSendMessages = false;
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File? icon;
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Conversation({
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required this.id,
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required this.userId,
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required this.symmetricKey,
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required this.admin,
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required this.name,
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required this.twoUser,
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required this.status,
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required this.isRead,
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required this.messageExpiryDefault,
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required this.adminAddMembers,
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required this.adminEditInfo,
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required this.adminSendMessages,
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this.icon,
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});
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factory Conversation.fromJson(Map<String, dynamic> json, RSAPrivateKey privKey) {
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var symmetricKeyDecrypted = CryptoUtils.rsaDecrypt(
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base64.decode(json['symmetric_key']),
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privKey,
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);
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var id = AesHelper.aesDecrypt(
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symmetricKeyDecrypted,
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base64.decode(json['conversation_detail_id']),
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);
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var admin = AesHelper.aesDecrypt(
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symmetricKeyDecrypted,
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base64.decode(json['admin']),
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);
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return Conversation(
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id: id,
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userId: json['user_id'],
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symmetricKey: base64.encode(symmetricKeyDecrypted),
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admin: admin == 'true',
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name: 'Unknown',
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twoUser: false,
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status: ConversationStatus.complete,
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isRead: true,
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messageExpiryDefault: 'no_expiry',
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adminAddMembers: true,
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adminEditInfo: true,
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adminSendMessages: false,
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);
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}
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Future<Map<String, dynamic>> payloadJson({ bool includeUsers = true }) async {
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MyProfile profile = await MyProfile.getProfile();
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var symKey = base64.decode(symmetricKey);
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if (!includeUsers) {
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return {
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'id': id,
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'name': AesHelper.aesEncrypt(symKey, Uint8List.fromList(name.codeUnits)),
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'users': await ConversationUsersRepository.getEncryptedConversationUsers(this, symKey),
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};
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}
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List<ConversationUser> users = await ConversationUsersRepository.getConversationUsers(this);
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List<Object> userConversations = [];
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for (ConversationUser user in users) {
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RSAPublicKey pubKey = profile.publicKey!;
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String newId = id;
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if (profile.id != user.userId) {
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Friend friend = await FriendsRepository.getFriendByFriendId(user.userId);
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pubKey = friend.publicKey;
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newId = (const Uuid()).v4();
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}
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userConversations.add({
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'id': newId,
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'user_id': user.userId,
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'conversation_detail_id': AesHelper.aesEncrypt(symKey, Uint8List.fromList(id.codeUnits)),
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'admin': AesHelper.aesEncrypt(symKey, Uint8List.fromList((user.admin ? 'true' : 'false').codeUnits)),
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'symmetric_key': base64.encode(CryptoUtils.rsaEncrypt(symKey, pubKey)),
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});
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}
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Map<String, dynamic> returnData = {
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'id': id,
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'name': AesHelper.aesEncrypt(symKey, Uint8List.fromList(name.codeUnits)),
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'users': await ConversationUsersRepository.getEncryptedConversationUsers(this, symKey),
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'two_user': AesHelper.aesEncrypt(symKey, Uint8List.fromList((twoUser ? 'true' : 'false').codeUnits)),
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'message_expiry': messageExpiryDefault,
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'admin_add_members': AesHelper.aesEncrypt(symKey, Uint8List.fromList((adminAddMembers ? 'true' : 'false').codeUnits)),
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'admin_edit_info': AesHelper.aesEncrypt(symKey, Uint8List.fromList((adminEditInfo ? 'true' : 'false').codeUnits)),
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'admin_send_messages': AesHelper.aesEncrypt(symKey, Uint8List.fromList((adminSendMessages ? 'true' : 'false').codeUnits)),
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'user_conversations': userConversations,
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};
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if (icon != null) {
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returnData['attachment'] = {
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'data': AesHelper.aesEncrypt(symmetricKey, Uint8List.fromList(icon!.readAsBytesSync())),
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'mimetype': lookupMimeType(icon!.path),
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'extension': getExtension(icon!.path),
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};
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}
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return returnData;
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}
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Map<String, dynamic> payloadImageJson() {
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if (icon == null) {
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return {};
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}
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return {
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'data': AesHelper.aesEncrypt(symmetricKey, Uint8List.fromList(icon!.readAsBytesSync())),
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'mimetype': lookupMimeType(icon!.path),
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'extension': getExtension(icon!.path),
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};
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}
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Map<String, dynamic> toMap() {
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return {
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'id': id,
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'user_id': userId,
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'symmetric_key': symmetricKey,
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'admin': admin ? 1 : 0,
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'name': name,
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'two_user': twoUser ? 1 : 0,
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'status': status.index,
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'is_read': isRead ? 1 : 0,
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'file': icon != null ? icon!.path : null,
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'message_expiry': messageExpiryDefault,
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'admin_add_members': adminAddMembers ? 1 : 0,
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'admin_edit_info': adminEditInfo ? 1 : 0,
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'admin_send_messages': adminSendMessages ? 1 : 0,
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};
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}
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@override
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String toString() {
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return '''
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id: $id
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userId: $userId
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name: $name
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admin: $admin''';
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}
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Future<Message?> getRecentMessage() async {
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final db = await getDatabaseConnection();
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final List<Map<String, dynamic>> maps = await db.rawQuery(
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'''
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SELECT * FROM messages WHERE association_key IN (
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SELECT association_key FROM conversation_users WHERE conversation_id = ?
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)
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ORDER BY created_at DESC
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LIMIT 1;
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''',
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[ id ],
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);
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if (maps.isEmpty) {
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return null;
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}
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return TextMessage(
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id: maps[0]['id'],
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symmetricKey: maps[0]['symmetric_key'],
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userSymmetricKey: maps[0]['user_symmetric_key'],
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text: maps[0]['data'] ?? 'Image',
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senderId: maps[0]['sender_id'],
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senderUsername: maps[0]['sender_username'],
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associationKey: maps[0]['association_key'],
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createdAt: maps[0]['created_at'],
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failedToSend: maps[0]['failed_to_send'] == 1,
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);
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}
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}
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