tdesktop/Telegram/SourceFiles/observer_peer.h

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/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org
Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.
Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#pragma once
#include "core/observer.h"
namespace Notify {
// Generic notifications about updates of some PeerData.
// You can subscribe to them by Notify::registerPeerObserver().
// 0x0000FFFFU for general peer updates (valid for any peer).
// 0xFFFF0000U for specific peer updates (valid for user / chat / channel).
struct PeerUpdate {
PeerUpdate(PeerData *updated = nullptr) : peer(updated) {
}
PeerData *peer;
enum class Flag {
// Common flags
NameChanged = 0x00000001U,
UsernameChanged = 0x00000002U,
PhotoChanged = 0x00000004U,
AboutChanged = 0x00000008U,
NotificationsEnabled = 0x00000010U,
SharedMediaChanged = 0x00000020U,
MigrationChanged = 0x00000040U,
PinnedChanged = 0x00000080U,
// For chats and channels
InviteLinkChanged = 0x00000100U,
MembersChanged = 0x00000200U,
AdminsChanged = 0x00000400U,
// For users
UserCanShareContact = 0x00010000U,
UserIsContact = 0x00020000U,
UserPhoneChanged = 0x00040000U,
UserIsBlocked = 0x00080000U,
BotCommandsChanged = 0x00100000U,
UserOnlineChanged = 0x00200000U,
BotCanAddToGroups = 0x00400000U,
UserCommonChatsChanged = 0x00800000U,
// For chats
ChatCanEdit = 0x00010000U,
// For channels
ChannelAmIn = 0x00010000U,
ChannelAmEditor = 0x00020000U,
ChannelCanEditPhoto = 0x00040000U,
ChannelCanAddMembers = 0x00080000U,
ChannelCanViewAdmins = 0x00100000U,
ChannelCanViewMembers = 0x00200000U,
};
Q_DECLARE_FLAGS(Flags, Flag);
Flags flags = 0;
// NameChanged data
PeerData::Names oldNames;
PeerData::NameFirstChars oldNameFirstChars;
// SharedMediaChanged data
int32 mediaTypesMask = 0;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(PeerUpdate::Flags);
void peerUpdatedDelayed(const PeerUpdate &update);
inline void peerUpdatedDelayed(PeerData *peer, PeerUpdate::Flags events) {
PeerUpdate update(peer);
update.flags = events;
peerUpdatedDelayed(update);
}
void peerUpdatedSendDelayed();
inline void mediaOverviewUpdated(PeerData *peer, MediaOverviewType type) {
PeerUpdate update(peer);
update.flags |= PeerUpdate::Flag::SharedMediaChanged;
update.mediaTypesMask |= (1 << type);
peerUpdatedDelayed(update);
}
class PeerUpdatedHandler {
public:
template <typename Lambda>
PeerUpdatedHandler(PeerUpdate::Flags events, Lambda &&handler) : _events(events), _handler(std::move(handler)) {
}
void operator()(const PeerUpdate &update) const {
if (update.flags & _events) {
_handler(update);
}
}
private:
PeerUpdate::Flags _events;
base::lambda<void(const PeerUpdate&)> _handler;
};
base::Observable<PeerUpdate, PeerUpdatedHandler> &PeerUpdated();
} // namespace Notify