741 lines
27 KiB
Dart
741 lines
27 KiB
Dart
/*
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* Famedly Matrix SDK
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* Copyright (C) 2019, 2020, 2021 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:http/http.dart' as http;
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import 'package:matrix_file_e2ee/matrix_file_e2ee.dart';
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import '../famedlysdk.dart';
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import 'database/database.dart' show DbRoomState, DbEvent;
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import 'room.dart';
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import 'utils/matrix_localizations.dart';
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import 'utils/receipt.dart';
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import 'utils/run_in_background.dart';
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import 'utils/event_localizations.dart';
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abstract class RelationshipTypes {
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static const String Reply = 'm.in_reply_to';
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static const String Edit = 'm.replace';
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static const String Reaction = 'm.annotation';
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}
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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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@Deprecated('Use [sender.calcDisplayname()] instead')
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String get senderName => sender.calcDisplayname();
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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['redacted_because'] is Map
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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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// synapse unfortunatley isn't following the spec and tosses the prev_content
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// into the unsigned block.
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// Currently we are facing a very strange bug in web which is impossible to debug.
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// It may be because of this line so we put this in try-catch until we can fix it.
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try {
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this.prevContent = (prevContent != null && prevContent.isNotEmpty)
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? prevContent
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: (unsigned != null &&
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unsigned.containsKey('prev_content') &&
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unsigned['prev_content'] is Map)
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? unsigned['prev_content']
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: null;
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} catch (_) {
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// A strange bug in dart web makes this crash
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}
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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'] ??
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unsigned[MessageSendingStatusKey] ??
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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 != null
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? DateTime.fromMillisecondsSinceEpoch(dbEntry.originServerTs)
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: 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 => type == EventTypes.Sticker
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? MessageTypes.Sticker
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: (content['msgtype'] is String ? 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'] is String ? 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 =>
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content['formatted_body'] is String ? 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: EventUpdateType.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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// we do not remove the event here. It will automatically be updated
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// in the `sendEvent` method to transition -1 -> 0 -> 1 -> 2
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final newEventId = await room.sendEvent(
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content,
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txid: txid ?? unsigned['transaction_id'] ?? eventId,
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);
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return newEventId;
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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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/// Searches for the reply event in the given timeline.
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Future<Event> getReplyEvent(Timeline timeline) async {
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if (relationshipType != RelationshipTypes.Reply) return null;
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return await timeline.getEventById(relationshipEventId);
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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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/// Gets the info map of file events, or a blank map if none present
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Map get infoMap =>
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content['info'] is Map ? content['info'] : <String, dynamic>{};
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/// Gets the thumbnail info map of file events, or a blank map if nonepresent
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Map get thumbnailInfoMap => infoMap['thumbnail_info'] is Map
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? infoMap['thumbnail_info']
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: <String, dynamic>{};
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/// Returns if a file event has an attachment
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bool get hasAttachment => content['url'] is String || content['file'] is Map;
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/// Returns if a file event has a thumbnail
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bool get hasThumbnail =>
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infoMap['thumbnail_url'] is String || infoMap['thumbnail_file'] is Map;
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/// Returns if a file events attachment is encrypted
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bool get isAttachmentEncrypted => content['file'] is Map;
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/// Returns if a file events thumbnail is encrypted
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bool get isThumbnailEncrypted => infoMap['thumbnail_file'] is Map;
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/// Gets the mimetipe of the attachment of a file event, or a blank string if not present
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String get attachmentMimetype => infoMap['mimetype'] is String
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? infoMap['mimetype'].toLowerCase()
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: (content['file'] is Map && content['file']['mimetype'] is String
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? content['file']['mimetype']
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: '');
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/// Gets the mimetype of the thumbnail of a file event, or a blank string if not present
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String get thumbnailMimetype => thumbnailInfoMap['mimetype'] is String
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? thumbnailInfoMap['mimetype'].toLowerCase()
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: (infoMap['thumbnail_file'] is Map &&
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infoMap['thumbnail_file']['mimetype'] is String
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? infoMap['thumbnail_file']['mimetype']
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: '');
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/// Gets the underyling mxc url of an attachment of a file event, or null if not present
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String get attachmentMxcUrl =>
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isAttachmentEncrypted ? content['file']['url'] : content['url'];
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/// Gets the underyling mxc url of a thumbnail of a file event, or null if not present
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String get thumbnailMxcUrl => isThumbnailEncrypted
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? infoMap['thumbnail_file']['url']
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: infoMap['thumbnail_url'];
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/// Gets the mxc url of an attachemnt/thumbnail of a file event, taking sizes into account, or null if not present
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String attachmentOrThumbnailMxcUrl({bool getThumbnail = false}) {
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if (getThumbnail &&
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infoMap['size'] is int &&
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thumbnailInfoMap['size'] is int &&
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infoMap['size'] <= thumbnailInfoMap['size']) {
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getThumbnail = false;
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}
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if (getThumbnail && !hasThumbnail) {
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getThumbnail = false;
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}
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return getThumbnail ? thumbnailMxcUrl : attachmentMxcUrl;
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}
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// size determined from an approximate 800x800 jpeg thumbnail with method=scale
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static const _minNoThumbSize = 80 * 1024;
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/// Gets the attachment https URL to display in the timeline, taking into account if the original image is tiny.
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/// Returns null for encrypted rooms, if the image can't be fetched via http url or if the event does not contain an attachment.
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/// Set [getThumbnail] to true to fetch the thumbnail, set [width], [height] and [method]
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/// for the respective thumbnailing properties.
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/// [minNoThumbSize] is the minimum size that an original image may be to not fetch its thumbnail, defaults to 80k
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/// [useThumbnailMxcUrl] says weather to use the mxc url of the thumbnail, rather than the original attachment.
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/// [animated] says weather the thumbnail is animated
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String getAttachmentUrl(
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{bool getThumbnail = false,
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bool useThumbnailMxcUrl = false,
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double width = 800.0,
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double height = 800.0,
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ThumbnailMethod method = ThumbnailMethod.scale,
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int minNoThumbSize = _minNoThumbSize,
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bool animated = false}) {
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if (![EventTypes.Message, EventTypes.Sticker].contains(type) ||
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!hasAttachment ||
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isAttachmentEncrypted) {
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return null; // can't url-thumbnail in encrypted rooms
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}
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if (useThumbnailMxcUrl && !hasThumbnail) {
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return null; // can't fetch from thumbnail
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}
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final thisInfoMap = useThumbnailMxcUrl ? thumbnailInfoMap : infoMap;
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final thisMxcUrl =
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useThumbnailMxcUrl ? infoMap['thumbnail_url'] : content['url'];
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// if we have as method scale, we can return safely the original image, should it be small enough
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if (getThumbnail &&
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method == ThumbnailMethod.scale &&
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thisInfoMap['size'] is int &&
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thisInfoMap['size'] < minNoThumbSize) {
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getThumbnail = false;
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}
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// now generate the actual URLs
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if (getThumbnail) {
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return Uri.parse(thisMxcUrl).getThumbnail(
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room.client,
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width: width,
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height: height,
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method: method,
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animated: animated,
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);
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} else {
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return Uri.parse(thisMxcUrl).getDownloadLink(room.client);
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}
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}
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/// Returns if an attachment is in the local store
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Future<bool> isAttachmentInLocalStore({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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final mxcUrl = attachmentOrThumbnailMxcUrl(getThumbnail: getThumbnail);
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if (!(mxcUrl is String)) {
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throw ("This event hasn't any attachment or thumbnail.");
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}
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getThumbnail = mxcUrl != attachmentMxcUrl;
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// Is this file storeable?
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final thisInfoMap = getThumbnail ? thumbnailInfoMap : infoMap;
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var storeable = room.client.database != null &&
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thisInfoMap['size'] is int &&
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thisInfoMap['size'] <= room.client.database.maxFileSize;
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Uint8List uint8list;
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if (storeable) {
|
|
uint8list = await room.client.database.getFile(mxcUrl);
|
|
}
|
|
return uint8list != null;
|
|
}
|
|
|
|
/// Downloads (and decryptes if necessary) the attachment of this
|
|
/// event and returns it as a [MatrixFile]. If this event doesn't
|
|
/// contain an attachment, this throws an error. Set [getThumbnail] to
|
|
/// true to download the thumbnail instead.
|
|
Future<MatrixFile> downloadAndDecryptAttachment(
|
|
{bool getThumbnail = false,
|
|
Future<Uint8List> Function(String) downloadCallback}) async {
|
|
if (![EventTypes.Message, EventTypes.Sticker].contains(type)) {
|
|
throw ("This event has the type '$type' and so it can't contain an attachment.");
|
|
}
|
|
final mxcUrl = attachmentOrThumbnailMxcUrl(getThumbnail: getThumbnail);
|
|
if (!(mxcUrl is String)) {
|
|
throw ("This event hasn't any attachment or thumbnail.");
|
|
}
|
|
getThumbnail = mxcUrl != attachmentMxcUrl;
|
|
final isEncrypted =
|
|
getThumbnail ? isThumbnailEncrypted : isAttachmentEncrypted;
|
|
|
|
if (isEncrypted && !room.client.encryptionEnabled) {
|
|
throw ('Encryption is not enabled in your Client.');
|
|
}
|
|
final mxContent = Uri.parse(mxcUrl);
|
|
|
|
Uint8List uint8list;
|
|
|
|
// Is this file storeable?
|
|
final thisInfoMap = getThumbnail ? thumbnailInfoMap : infoMap;
|
|
var storeable = room.client.database != null &&
|
|
thisInfoMap['size'] is int &&
|
|
thisInfoMap['size'] <= room.client.database.maxFileSize;
|
|
|
|
if (storeable) {
|
|
uint8list = await room.client.database.getFile(mxContent.toString());
|
|
}
|
|
|
|
// Download the file
|
|
if (uint8list == null) {
|
|
downloadCallback ??= (String url) async {
|
|
return (await http.get(url)).bodyBytes;
|
|
};
|
|
uint8list =
|
|
await downloadCallback(mxContent.getDownloadLink(room.client));
|
|
storeable = storeable &&
|
|
uint8list.lengthInBytes < room.client.database.maxFileSize;
|
|
if (storeable) {
|
|
await room.client.database.storeFile(mxContent.toString(), uint8list,
|
|
DateTime.now().millisecondsSinceEpoch);
|
|
}
|
|
}
|
|
|
|
// Decrypt the file
|
|
if (isEncrypted) {
|
|
final fileMap =
|
|
getThumbnail ? infoMap['thumbnail_file'] : content['file'];
|
|
if (!fileMap['key']['key_ops'].contains('decrypt')) {
|
|
throw ("Missing 'decrypt' in 'key_ops'.");
|
|
}
|
|
final encryptedFile = EncryptedFile();
|
|
encryptedFile.data = uint8list;
|
|
encryptedFile.iv = fileMap['iv'];
|
|
encryptedFile.k = fileMap['key']['k'];
|
|
encryptedFile.sha256 = fileMap['hashes']['sha256'];
|
|
uint8list = await runInBackground(decryptFile, encryptedFile);
|
|
}
|
|
return MatrixFile(bytes: uint8list, name: body);
|
|
}
|
|
|
|
/// Returns if this is a known event type.
|
|
bool get isEventTypeKnown =>
|
|
EventLocalizations.localizationsMap.containsKey(type);
|
|
|
|
/// Returns a localized String representation of this event. For a
|
|
/// room list you may find [withSenderNamePrefix] useful. Set [hideReply] to
|
|
/// crop all lines starting with '>'.
|
|
String getLocalizedBody(MatrixLocalizations i18n,
|
|
{bool withSenderNamePrefix = false, bool hideReply = false}) {
|
|
if (redacted) {
|
|
return i18n.removedBy(redactedBecause.sender.calcDisplayname());
|
|
}
|
|
final callback = EventLocalizations.localizationsMap[type];
|
|
var localizedBody = i18n.unknownEvent(type);
|
|
if (callback != null) {
|
|
localizedBody = callback(this, i18n);
|
|
}
|
|
|
|
// 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 : sender.calcDisplayname();
|
|
localizedBody = '$senderNameOrYou: $localizedBody';
|
|
}
|
|
|
|
return localizedBody;
|
|
}
|
|
|
|
static const Set<String> textOnlyMessageTypes = {
|
|
MessageTypes.Text,
|
|
MessageTypes.Notice,
|
|
MessageTypes.Emote,
|
|
MessageTypes.None,
|
|
};
|
|
|
|
/// returns if this event matches the passed event or transaction id
|
|
bool matchesEventOrTransactionId(String search) {
|
|
if (search == null) {
|
|
return false;
|
|
}
|
|
if (eventId == search) {
|
|
return true;
|
|
}
|
|
return unsigned != null && unsigned['transaction_id'] == search;
|
|
}
|
|
|
|
/// Get the relationship type of an event. `null` if there is none
|
|
String get relationshipType {
|
|
if (content?.tryGet<Map<String, dynamic>>('m.relates_to') == null) {
|
|
return null;
|
|
}
|
|
if (content['m.relates_to'].containsKey('m.in_reply_to')) {
|
|
return RelationshipTypes.Reply;
|
|
}
|
|
return content
|
|
.tryGet<Map<String, dynamic>>('m.relates_to')
|
|
.tryGet<String>('rel_type');
|
|
}
|
|
|
|
/// Get the event ID that this relationship will reference. `null` if there is none
|
|
String get relationshipEventId {
|
|
if (content == null || !(content['m.relates_to'] is Map)) {
|
|
return null;
|
|
}
|
|
if (content['m.relates_to'].containsKey('event_id')) {
|
|
return content['m.relates_to']['event_id'];
|
|
}
|
|
if (content['m.relates_to']['m.in_reply_to'] is Map &&
|
|
content['m.relates_to']['m.in_reply_to'].containsKey('event_id')) {
|
|
return content['m.relates_to']['m.in_reply_to']['event_id'];
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/// Get wether this event has aggregated events from a certain [type]
|
|
/// To be able to do that you need to pass a [timeline]
|
|
bool hasAggregatedEvents(Timeline timeline, String type) =>
|
|
timeline.aggregatedEvents.containsKey(eventId) &&
|
|
timeline.aggregatedEvents[eventId].containsKey(type);
|
|
|
|
/// Get all the aggregated event objects for a given [type]. To be able to do this
|
|
/// you have to pass a [timeline]
|
|
Set<Event> aggregatedEvents(Timeline timeline, String type) =>
|
|
hasAggregatedEvents(timeline, type)
|
|
? timeline.aggregatedEvents[eventId][type]
|
|
: <Event>{};
|
|
|
|
/// Fetches the event to be rendered, taking into account all the edits and the like.
|
|
/// It needs a [timeline] for that.
|
|
Event getDisplayEvent(Timeline timeline) {
|
|
if (redacted) {
|
|
return this;
|
|
}
|
|
if (hasAggregatedEvents(timeline, RelationshipTypes.Edit)) {
|
|
// alright, we have an edit
|
|
final allEditEvents = aggregatedEvents(timeline, RelationshipTypes.Edit)
|
|
// we only allow edits made by the original author themself
|
|
.where((e) => e.senderId == senderId && e.type == EventTypes.Message)
|
|
.toList();
|
|
// we need to check again if it isn't empty, as we potentially removed all
|
|
// aggregated edits
|
|
if (allEditEvents.isNotEmpty) {
|
|
allEditEvents.sort((a, b) => a.sortOrder - b.sortOrder > 0 ? 1 : -1);
|
|
var rawEvent = allEditEvents.last.toJson();
|
|
// update the content of the new event to render
|
|
if (rawEvent['content']['m.new_content'] is Map) {
|
|
rawEvent['content'] = rawEvent['content']['m.new_content'];
|
|
}
|
|
return Event.fromJson(rawEvent, room);
|
|
}
|
|
}
|
|
return this;
|
|
}
|
|
|
|
/// returns if a message is a rich message
|
|
bool get isRichMessage =>
|
|
content['format'] == 'org.matrix.custom.html' &&
|
|
content['formatted_body'] is String;
|
|
|
|
// regexes to fetch the number of emotes, including emoji, and if the message consists of only those
|
|
// to match an emoji we can use the following regex:
|
|
// (?:\x{00a9}|\x{00ae}|[\x{2000}-\x{3300}]|\x{d83c}[\x{d000}-\x{dfff}]|\x{d83d}[\x{d000}-\x{dfff}]|\x{d83e}[\x{d000}-\x{dfff}])[\x{fe00}-\x{fe0f}]?
|
|
// we need to replace \x{0000} with \u0000, the comment is left in the other format to be able to paste into regex101.com
|
|
// to see if there is a custom emote, we use the following regex: <img[^>]+data-mx-(?:emote|emoticon)(?==|>|\s)[^>]*>
|
|
// now we combind the two to have four regexes:
|
|
// 1. are there only emoji, or whitespace
|
|
// 2. are there only emoji, emotes, or whitespace
|
|
// 3. count number of emoji
|
|
// 4- count number of emoji or emotes
|
|
static final RegExp _onlyEmojiRegex = RegExp(
|
|
r'^((?:\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])[\ufe00-\ufe0f]?|\s)*$',
|
|
caseSensitive: false,
|
|
multiLine: false);
|
|
static final RegExp _onlyEmojiEmoteRegex = RegExp(
|
|
r'^((?:\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])[\ufe00-\ufe0f]?|<img[^>]+data-mx-(?:emote|emoticon)(?==|>|\s)[^>]*>|\s)*$',
|
|
caseSensitive: false,
|
|
multiLine: false);
|
|
static final RegExp _countEmojiRegex = RegExp(
|
|
r'((?:\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])[\ufe00-\ufe0f]?)',
|
|
caseSensitive: false,
|
|
multiLine: false);
|
|
static final RegExp _countEmojiEmoteRegex = RegExp(
|
|
r'((?:\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])[\ufe00-\ufe0f]?|<img[^>]+data-mx-(?:emote|emoticon)(?==|>|\s)[^>]*>)',
|
|
caseSensitive: false,
|
|
multiLine: false);
|
|
|
|
/// Returns if a given event only has emotes, emojis or whitespace as content.
|
|
/// This is useful to determine if stand-alone emotes should be displayed bigger.
|
|
bool get onlyEmotes => isRichMessage
|
|
? _onlyEmojiEmoteRegex.hasMatch(formattedText)
|
|
: _onlyEmojiRegex.hasMatch(text);
|
|
|
|
/// Gets the number of emotes in a given message. This is useful to determine if
|
|
/// emotes should be displayed bigger. WARNING: This does **not** test if there are
|
|
/// only emotes. Use `event.onlyEmotes` for that!
|
|
int get numberEmotes => isRichMessage
|
|
? _countEmojiEmoteRegex.allMatches(formattedText).length
|
|
: _countEmojiRegex.allMatches(text).length;
|
|
}
|