663 lines
23 KiB
Dart
663 lines
23 KiB
Dart
/*
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* Famedly Matrix SDK
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* Copyright (C) 2019, 2020 Famedly GmbH
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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import 'dart:convert';
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import 'dart:typed_data';
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import 'package:famedlysdk/famedlysdk.dart';
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import 'package:famedlysdk/encryption.dart';
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import 'package:famedlysdk/src/utils/receipt.dart';
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import 'package:http/http.dart' as http;
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import 'package:matrix_file_e2ee/matrix_file_e2ee.dart';
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import '../matrix_api.dart';
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import './room.dart';
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import 'utils/matrix_localizations.dart';
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import './database/database.dart' show DbRoomState, DbEvent;
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/// All data exchanged over Matrix is expressed as an "event". Typically each client action (e.g. sending a message) correlates with exactly one event.
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class Event extends MatrixEvent {
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User get sender => room.getUserByMXIDSync(senderId ?? '@unknown');
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@Deprecated('Use [originServerTs] instead')
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DateTime get time => originServerTs;
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@Deprecated('Use [type] instead')
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String get typeKey => type;
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/// The room this event belongs to. May be null.
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final Room room;
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/// The status of this event.
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/// -1=ERROR
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/// 0=SENDING
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/// 1=SENT
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/// 2=TIMELINE
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/// 3=ROOM_STATE
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int status;
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static const int defaultStatus = 2;
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static const Map<String, int> STATUS_TYPE = {
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'ERROR': -1,
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'SENDING': 0,
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'SENT': 1,
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'TIMELINE': 2,
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'ROOM_STATE': 3,
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};
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/// Optional. The event that redacted this event, if any. Otherwise null.
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Event get redactedBecause =>
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unsigned != null && unsigned.containsKey('redacted_because')
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? Event.fromJson(unsigned['redacted_because'], room)
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: null;
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bool get redacted => redactedBecause != null;
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User get stateKeyUser => room.getUserByMXIDSync(stateKey);
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double sortOrder;
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Event(
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{this.status = defaultStatus,
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Map<String, dynamic> content,
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String type,
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String eventId,
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String roomId,
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String senderId,
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DateTime originServerTs,
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Map<String, dynamic> unsigned,
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Map<String, dynamic> prevContent,
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String stateKey,
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this.room,
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this.sortOrder = 0.0}) {
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this.content = content;
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this.type = type;
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this.eventId = eventId;
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this.roomId = roomId ?? room?.id;
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this.senderId = senderId;
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this.unsigned = unsigned;
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this.prevContent = prevContent;
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this.stateKey = stateKey;
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this.originServerTs = originServerTs;
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}
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static Map<String, dynamic> getMapFromPayload(dynamic payload) {
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if (payload is String) {
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try {
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return json.decode(payload);
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} catch (e) {
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return {};
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}
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}
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if (payload is Map<String, dynamic>) return payload;
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return {};
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}
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factory Event.fromMatrixEvent(
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MatrixEvent matrixEvent,
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Room room, {
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double sortOrder,
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int status,
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}) =>
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Event(
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status: status,
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content: matrixEvent.content,
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type: matrixEvent.type,
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eventId: matrixEvent.eventId,
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roomId: room.id,
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senderId: matrixEvent.senderId,
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originServerTs: matrixEvent.originServerTs,
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unsigned: matrixEvent.unsigned,
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prevContent: matrixEvent.prevContent,
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stateKey: matrixEvent.stateKey,
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room: room,
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sortOrder: sortOrder,
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);
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/// Get a State event from a table row or from the event stream.
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factory Event.fromJson(Map<String, dynamic> jsonPayload, Room room,
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[double sortOrder]) {
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final content = Event.getMapFromPayload(jsonPayload['content']);
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final unsigned = Event.getMapFromPayload(jsonPayload['unsigned']);
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final prevContent = Event.getMapFromPayload(jsonPayload['prev_content']);
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return Event(
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status: jsonPayload['status'] ?? defaultStatus,
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stateKey: jsonPayload['state_key'],
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prevContent: prevContent,
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content: content,
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type: jsonPayload['type'],
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eventId: jsonPayload['event_id'],
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roomId: jsonPayload['room_id'],
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senderId: jsonPayload['sender'],
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originServerTs: jsonPayload.containsKey('origin_server_ts')
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? DateTime.fromMillisecondsSinceEpoch(jsonPayload['origin_server_ts'])
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: DateTime.now(),
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unsigned: unsigned,
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room: room,
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sortOrder: sortOrder ?? 0.0,
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);
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}
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/// Get an event from either DbRoomState or DbEvent
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factory Event.fromDb(dynamic dbEntry, Room room) {
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if (!(dbEntry is DbRoomState || dbEntry is DbEvent)) {
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throw ('Unknown db type');
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}
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final content = Event.getMapFromPayload(dbEntry.content);
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final unsigned = Event.getMapFromPayload(dbEntry.unsigned);
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final prevContent = Event.getMapFromPayload(dbEntry.prevContent);
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return Event(
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status: (dbEntry is DbEvent ? dbEntry.status : null) ?? defaultStatus,
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stateKey: dbEntry.stateKey,
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prevContent: prevContent,
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content: content,
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type: dbEntry.type,
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eventId: dbEntry.eventId,
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roomId: dbEntry.roomId,
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senderId: dbEntry.sender,
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originServerTs: dbEntry.originServerTs ?? DateTime.now(),
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unsigned: unsigned,
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room: room,
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sortOrder: dbEntry.sortOrder ?? 0.0,
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);
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}
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@override
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Map<String, dynamic> toJson() {
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final data = <String, dynamic>{};
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if (stateKey != null) data['state_key'] = stateKey;
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if (prevContent != null && prevContent.isNotEmpty) {
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data['prev_content'] = prevContent;
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}
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data['content'] = content;
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data['type'] = type;
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data['event_id'] = eventId;
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data['room_id'] = roomId;
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data['sender'] = senderId;
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data['origin_server_ts'] = originServerTs.millisecondsSinceEpoch;
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if (unsigned != null && unsigned.isNotEmpty) {
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data['unsigned'] = unsigned;
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}
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return data;
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}
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User get asUser => User.fromState(
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stateKey: stateKey,
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prevContent: prevContent,
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content: content,
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typeKey: type,
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eventId: eventId,
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roomId: roomId,
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senderId: senderId,
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originServerTs: originServerTs,
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unsigned: unsigned,
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room: room);
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String get messageType => (content.containsKey('m.relates_to') &&
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content['m.relates_to']['m.in_reply_to'] != null)
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? MessageTypes.Reply
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: content['msgtype'] ?? MessageTypes.Text;
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void setRedactionEvent(Event redactedBecause) {
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unsigned = {
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'redacted_because': redactedBecause.toJson(),
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};
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prevContent = null;
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var contentKeyWhiteList = <String>[];
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switch (type) {
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case EventTypes.RoomMember:
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contentKeyWhiteList.add('membership');
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break;
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case EventTypes.RoomCreate:
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contentKeyWhiteList.add('creator');
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break;
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case EventTypes.RoomJoinRules:
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contentKeyWhiteList.add('join_rule');
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break;
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case EventTypes.RoomPowerLevels:
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contentKeyWhiteList.add('ban');
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contentKeyWhiteList.add('events');
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contentKeyWhiteList.add('events_default');
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contentKeyWhiteList.add('kick');
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contentKeyWhiteList.add('redact');
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contentKeyWhiteList.add('state_default');
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contentKeyWhiteList.add('users');
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contentKeyWhiteList.add('users_default');
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break;
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case EventTypes.RoomAliases:
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contentKeyWhiteList.add('aliases');
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break;
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case EventTypes.HistoryVisibility:
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contentKeyWhiteList.add('history_visibility');
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break;
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default:
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break;
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}
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var toRemoveList = <String>[];
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for (var entry in content.entries) {
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if (!contentKeyWhiteList.contains(entry.key)) {
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toRemoveList.add(entry.key);
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}
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}
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toRemoveList.forEach((s) => content.remove(s));
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}
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/// Returns the body of this event if it has a body.
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String get text => content['body'] ?? '';
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/// Returns the formatted boy of this event if it has a formatted body.
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String get formattedText => content['formatted_body'] ?? '';
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/// Use this to get the body.
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String get body {
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if (redacted) return 'Redacted';
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if (text != '') return text;
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if (formattedText != '') return formattedText;
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return '$type';
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}
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/// Returns a list of [Receipt] instances for this event.
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List<Receipt> get receipts {
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if (!(room.roomAccountData.containsKey('m.receipt'))) return [];
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var receiptsList = <Receipt>[];
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for (var entry in room.roomAccountData['m.receipt'].content.entries) {
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if (entry.value['event_id'] == eventId) {
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receiptsList.add(Receipt(room.getUserByMXIDSync(entry.key),
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DateTime.fromMillisecondsSinceEpoch(entry.value['ts'])));
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}
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}
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return receiptsList;
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}
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/// Removes this event if the status is < 1. This event will just be removed
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/// from the database and the timelines. Returns false if not removed.
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Future<bool> remove() async {
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if (status < 1) {
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await room.client.database?.removeEvent(room.client.id, eventId, room.id);
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room.client.onEvent.add(EventUpdate(
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roomID: room.id,
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type: 'timeline',
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eventType: type,
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content: {
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'event_id': eventId,
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'status': -2,
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'content': {'body': 'Removed...'}
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},
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sortOrder: sortOrder));
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return true;
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}
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return false;
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}
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/// Try to send this event again. Only works with events of status -1.
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Future<String> sendAgain({String txid}) async {
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if (status != -1) return null;
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await remove();
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final eventID = await room.sendEvent(
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content,
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txid: txid ?? unsigned['transaction_id'],
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);
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return eventID;
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}
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/// Whether the client is allowed to redact this event.
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bool get canRedact => senderId == room.client.userID || room.canRedact;
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/// Redacts this event. Returns [ErrorResponse] on error.
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Future<dynamic> redact({String reason, String txid}) =>
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room.redactEvent(eventId, reason: reason, txid: txid);
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/// Whether this event is in reply to another event.
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bool get isReply =>
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content['m.relates_to'] is Map<String, dynamic> &&
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content['m.relates_to']['m.in_reply_to'] is Map<String, dynamic> &&
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content['m.relates_to']['m.in_reply_to']['event_id'] is String &&
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(content['m.relates_to']['m.in_reply_to']['event_id'] as String)
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.isNotEmpty;
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/// Searches for the reply event in the given timeline.
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Future<Event> getReplyEvent(Timeline timeline) async {
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if (!isReply) return null;
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final String replyEventId =
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content['m.relates_to']['m.in_reply_to']['event_id'];
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return await timeline.getEventById(replyEventId);
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}
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/// If this event is encrypted and the decryption was not successful because
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/// the session is unknown, this requests the session key from other devices
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/// in the room. If the event is not encrypted or the decryption failed because
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/// of a different error, this throws an exception.
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Future<void> requestKey() async {
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if (type != EventTypes.Encrypted ||
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messageType != MessageTypes.BadEncrypted ||
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content['can_request_session'] != true) {
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throw ('Session key not requestable');
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}
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await room.requestSessionKey(content['session_id'], content['sender_key']);
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return;
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}
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bool get hasThumbnail =>
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content['info'] is Map<String, dynamic> &&
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(content['info'].containsKey('thumbnail_url') ||
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content['info'].containsKey('thumbnail_file'));
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/// Downloads (and decryptes if necessary) the attachment of this
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/// event and returns it as a [MatrixFile]. If this event doesn't
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/// contain an attachment, this throws an error. Set [getThumbnail] to
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/// true to download the thumbnail instead.
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Future<MatrixFile> downloadAndDecryptAttachment(
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{bool getThumbnail = false}) async {
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if (![EventTypes.Message, EventTypes.Sticker].contains(type)) {
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throw ("This event has the type '$type' and so it can't contain an attachment.");
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}
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if (!getThumbnail &&
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!content.containsKey('url') &&
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!content.containsKey('file')) {
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throw ("This event hasn't any attachment.");
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}
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if (getThumbnail && !hasThumbnail) {
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throw ("This event hasn't any thumbnail.");
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}
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final isEncrypted = getThumbnail
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? !content['info'].containsKey('thumbnail_url')
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: !content.containsKey('url');
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if (isEncrypted && !room.client.encryptionEnabled) {
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throw ('Encryption is not enabled in your Client.');
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}
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var mxContent = getThumbnail
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? Uri.parse(isEncrypted
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? content['info']['thumbnail_file']['url']
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: content['info']['thumbnail_url'])
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: Uri.parse(isEncrypted ? content['file']['url'] : content['url']);
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Uint8List uint8list;
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// Is this file storeable?
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final infoMap =
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getThumbnail ? content['info']['thumbnail_info'] : content['info'];
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final storeable = room.client.database != null &&
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infoMap is Map<String, dynamic> &&
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infoMap['size'] is int &&
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infoMap['size'] <= room.client.database.maxFileSize;
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if (storeable) {
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uint8list = await room.client.database.getFile(mxContent.toString());
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}
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// Download the file
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if (uint8list == null) {
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uint8list =
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(await http.get(mxContent.getDownloadLink(room.client))).bodyBytes;
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if (storeable) {
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await room.client.database
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.storeFile(mxContent.toString(), uint8list, DateTime.now());
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}
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}
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// Decrypt the file
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if (isEncrypted) {
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final fileMap =
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getThumbnail ? content['info']['thumbnail_file'] : content['file'];
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if (!fileMap['key']['key_ops'].contains('decrypt')) {
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throw ("Missing 'decrypt' in 'key_ops'.");
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}
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final encryptedFile = EncryptedFile();
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encryptedFile.data = uint8list;
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encryptedFile.iv = fileMap['iv'];
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encryptedFile.k = fileMap['key']['k'];
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encryptedFile.sha256 = fileMap['hashes']['sha256'];
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uint8list = await decryptFile(encryptedFile);
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}
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return MatrixFile(bytes: uint8list, name: body);
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}
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/// Returns a localized String representation of this event. For a
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/// room list you may find [withSenderNamePrefix] useful. Set [hideReply] to
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/// crop all lines starting with '>'.
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String getLocalizedBody(MatrixLocalizations i18n,
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{bool withSenderNamePrefix = false, bool hideReply = false}) {
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if (redacted) {
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return i18n.removedBy(redactedBecause.sender.calcDisplayname());
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}
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var localizedBody = body;
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final senderName = sender.calcDisplayname();
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switch (type) {
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case EventTypes.Sticker:
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localizedBody = i18n.sentASticker(senderName);
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break;
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case EventTypes.Redaction:
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localizedBody = i18n.redactedAnEvent(senderName);
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break;
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case EventTypes.RoomAliases:
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localizedBody = i18n.changedTheRoomAliases(senderName);
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break;
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case EventTypes.RoomCanonicalAlias:
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localizedBody = i18n.changedTheRoomInvitationLink(senderName);
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break;
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case EventTypes.RoomCreate:
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localizedBody = i18n.createdTheChat(senderName);
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break;
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case EventTypes.RoomTombstone:
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localizedBody = i18n.roomHasBeenUpgraded;
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break;
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case EventTypes.RoomJoinRules:
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var joinRules = JoinRules.values.firstWhere(
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(r) =>
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r.toString().replaceAll('JoinRules.', '') ==
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content['join_rule'],
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orElse: () => null);
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if (joinRules == null) {
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localizedBody = i18n.changedTheJoinRules(senderName);
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} else {
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localizedBody = i18n.changedTheJoinRulesTo(
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senderName, joinRules.getLocalizedString(i18n));
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}
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break;
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case EventTypes.RoomMember:
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var text = 'Failed to parse member event';
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final targetName = stateKeyUser.calcDisplayname();
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// Has the membership changed?
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final newMembership = content['membership'] ?? '';
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final oldMembership = unsigned['prev_content'] is Map<String, dynamic>
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? unsigned['prev_content']['membership'] ?? ''
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: '';
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if (newMembership != oldMembership) {
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if (oldMembership == 'invite' && newMembership == 'join') {
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text = i18n.acceptedTheInvitation(targetName);
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} else if (oldMembership == 'invite' && newMembership == 'leave') {
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if (stateKey == senderId) {
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text = i18n.rejectedTheInvitation(targetName);
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} else {
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text = i18n.hasWithdrawnTheInvitationFor(senderName, targetName);
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}
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} else if (oldMembership == 'leave' && newMembership == 'join') {
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text = i18n.joinedTheChat(targetName);
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} else if (oldMembership == 'join' && newMembership == 'ban') {
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text = i18n.kickedAndBanned(senderName, targetName);
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} else if (oldMembership == 'join' &&
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newMembership == 'leave' &&
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stateKey != senderId) {
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text = i18n.kicked(senderName, targetName);
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} else if (oldMembership == 'join' &&
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newMembership == 'leave' &&
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stateKey == senderId) {
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text = i18n.userLeftTheChat(targetName);
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} else if (oldMembership == 'invite' && newMembership == 'ban') {
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text = i18n.bannedUser(senderName, targetName);
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} else if (oldMembership == 'leave' && newMembership == 'ban') {
|
|
text = i18n.bannedUser(senderName, targetName);
|
|
} else if (oldMembership == 'ban' && newMembership == 'leave') {
|
|
text = i18n.unbannedUser(senderName, targetName);
|
|
} else if (newMembership == 'invite') {
|
|
text = i18n.invitedUser(senderName, targetName);
|
|
} else if (newMembership == 'join') {
|
|
text = i18n.joinedTheChat(targetName);
|
|
}
|
|
} else if (newMembership == 'join') {
|
|
final newAvatar = content['avatar_url'] ?? '';
|
|
final oldAvatar = unsigned['prev_content'] is Map<String, dynamic>
|
|
? unsigned['prev_content']['avatar_url'] ?? ''
|
|
: '';
|
|
|
|
final newDisplayname = content['displayname'] ?? '';
|
|
final oldDisplayname =
|
|
unsigned['prev_content'] is Map<String, dynamic>
|
|
? unsigned['prev_content']['displayname'] ?? ''
|
|
: '';
|
|
|
|
// Has the user avatar changed?
|
|
if (newAvatar != oldAvatar) {
|
|
text = i18n.changedTheProfileAvatar(targetName);
|
|
}
|
|
// Has the user avatar changed?
|
|
else if (newDisplayname != oldDisplayname) {
|
|
text = i18n.changedTheDisplaynameTo(targetName, newDisplayname);
|
|
}
|
|
}
|
|
localizedBody = text;
|
|
break;
|
|
case EventTypes.RoomPowerLevels:
|
|
localizedBody = i18n.changedTheChatPermissions(senderName);
|
|
break;
|
|
case EventTypes.RoomName:
|
|
localizedBody = i18n.changedTheChatNameTo(senderName, content['name']);
|
|
break;
|
|
case EventTypes.RoomTopic:
|
|
localizedBody =
|
|
i18n.changedTheChatDescriptionTo(senderName, content['topic']);
|
|
break;
|
|
case EventTypes.RoomAvatar:
|
|
localizedBody = i18n.changedTheChatAvatar(senderName);
|
|
break;
|
|
case EventTypes.GuestAccess:
|
|
var guestAccess = GuestAccess.values.firstWhere(
|
|
(r) =>
|
|
r.toString().replaceAll('GuestAccess.', '') ==
|
|
content['guest_access'],
|
|
orElse: () => null);
|
|
if (guestAccess == null) {
|
|
localizedBody = i18n.changedTheGuestAccessRules(senderName);
|
|
} else {
|
|
localizedBody = i18n.changedTheGuestAccessRulesTo(
|
|
senderName, guestAccess.getLocalizedString(i18n));
|
|
}
|
|
break;
|
|
case EventTypes.HistoryVisibility:
|
|
var historyVisibility = HistoryVisibility.values.firstWhere(
|
|
(r) =>
|
|
r.toString().replaceAll('HistoryVisibility.', '') ==
|
|
content['history_visibility'],
|
|
orElse: () => null);
|
|
if (historyVisibility == null) {
|
|
localizedBody = i18n.changedTheHistoryVisibility(senderName);
|
|
} else {
|
|
localizedBody = i18n.changedTheHistoryVisibilityTo(
|
|
senderName, historyVisibility.getLocalizedString(i18n));
|
|
}
|
|
break;
|
|
case EventTypes.Encryption:
|
|
localizedBody = i18n.activatedEndToEndEncryption(senderName);
|
|
if (!room.client.encryptionEnabled) {
|
|
localizedBody += '. ' + i18n.needPantalaimonWarning;
|
|
}
|
|
break;
|
|
case EventTypes.Encrypted:
|
|
case EventTypes.Message:
|
|
switch (messageType) {
|
|
case MessageTypes.Image:
|
|
localizedBody = i18n.sentAPicture(senderName);
|
|
break;
|
|
case MessageTypes.File:
|
|
localizedBody = i18n.sentAFile(senderName);
|
|
break;
|
|
case MessageTypes.Audio:
|
|
localizedBody = i18n.sentAnAudio(senderName);
|
|
break;
|
|
case MessageTypes.Video:
|
|
localizedBody = i18n.sentAVideo(senderName);
|
|
break;
|
|
case MessageTypes.Location:
|
|
localizedBody = i18n.sharedTheLocation(senderName);
|
|
break;
|
|
case MessageTypes.Sticker:
|
|
localizedBody = i18n.sentASticker(senderName);
|
|
break;
|
|
case MessageTypes.Emote:
|
|
localizedBody = '* $body';
|
|
break;
|
|
case MessageTypes.BadEncrypted:
|
|
String errorText;
|
|
switch (body) {
|
|
case DecryptError.CHANNEL_CORRUPTED:
|
|
errorText = i18n.channelCorruptedDecryptError + '.';
|
|
break;
|
|
case DecryptError.NOT_ENABLED:
|
|
errorText = i18n.encryptionNotEnabled + '.';
|
|
break;
|
|
case DecryptError.UNKNOWN_ALGORITHM:
|
|
errorText = i18n.unknownEncryptionAlgorithm + '.';
|
|
break;
|
|
case DecryptError.UNKNOWN_SESSION:
|
|
errorText = i18n.noPermission + '.';
|
|
break;
|
|
default:
|
|
errorText = body;
|
|
break;
|
|
}
|
|
localizedBody = i18n.couldNotDecryptMessage(errorText);
|
|
break;
|
|
case MessageTypes.Text:
|
|
case MessageTypes.Notice:
|
|
case MessageTypes.None:
|
|
case MessageTypes.Reply:
|
|
localizedBody = body;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
localizedBody = i18n.unknownEvent(type);
|
|
}
|
|
|
|
// Hide reply fallback
|
|
if (hideReply) {
|
|
localizedBody = localizedBody.replaceFirst(
|
|
RegExp(r'^>( \*)? <[^>]+>[^\n\r]+\r?\n(> [^\n]*\r?\n)*\r?\n'), '');
|
|
}
|
|
|
|
// Add the sender name prefix
|
|
if (withSenderNamePrefix &&
|
|
type == EventTypes.Message &&
|
|
textOnlyMessageTypes.contains(messageType)) {
|
|
final senderNameOrYou =
|
|
senderId == room.client.userID ? i18n.you : senderName;
|
|
localizedBody = '$senderNameOrYou: $localizedBody';
|
|
}
|
|
|
|
return localizedBody;
|
|
}
|
|
|
|
static const Set<String> textOnlyMessageTypes = {
|
|
MessageTypes.Text,
|
|
MessageTypes.Reply,
|
|
MessageTypes.Notice,
|
|
MessageTypes.Emote,
|
|
MessageTypes.None,
|
|
};
|
|
}
|