tdesktop/Telegram/SourceFiles/structs.h

/*
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) 2014-2015 John Preston, https://desktop.telegram.org
*/
#pragma once

typedef int32 ChannelId;
static const ChannelId NoChannel = 0;

typedef uint64 PeerId;
static const uint64 PeerIdMask         = 0xFFFFFFFFULL;
static const uint64 PeerIdTypeMask     = 0x300000000ULL;
static const uint64 PeerIdUserShift    = 0x000000000ULL;
static const uint64 PeerIdChatShift    = 0x100000000ULL;
static const uint64 PeerIdChannelShift = 0x200000000ULL;
inline bool peerIsUser(const PeerId &id) {
	return (id & PeerIdTypeMask) == PeerIdUserShift;
}
inline bool peerIsChat(const PeerId &id) {
	return (id & PeerIdTypeMask) == PeerIdChatShift;
}
inline bool peerIsChannel(const PeerId &id) {
	return (id & PeerIdTypeMask) == PeerIdChannelShift;
}
inline PeerId peerFromUser(int32 user_id) {
	return PeerIdUserShift | uint64(uint32(user_id));
}
inline PeerId peerFromChat(int32 chat_id) {
	return PeerIdChatShift | uint64(uint32(chat_id));
}
inline PeerId peerFromChannel(ChannelId channel_id) {
	return PeerIdChannelShift | uint64(uint32(channel_id));
}
inline PeerId peerFromUser(const MTPint &user_id) {
	return peerFromUser(user_id.v);
}
inline PeerId peerFromChat(const MTPint &chat_id) {
	return peerFromChat(chat_id.v);
}
inline PeerId peerFromChannel(const MTPint &channel_id) {
	return peerFromChannel(channel_id.v);
}
inline int32 peerToBareInt(const PeerId &id) {
	return int32(uint32(id & PeerIdMask));
}
inline int32 peerToUser(const PeerId &id) {
	return peerIsUser(id) ? peerToBareInt(id) : 0;
}
inline int32 peerToChat(const PeerId &id) {
	return peerIsChat(id) ? peerToBareInt(id) : 0;
}
inline ChannelId peerToChannel(const PeerId &id) {
	return peerIsChannel(id) ? peerToBareInt(id) : NoChannel;
}
inline MTPint peerToBareMTPInt(const PeerId &id) {
	return MTP_int(peerToBareInt(id));
}
inline PeerId peerFromMTP(const MTPPeer &peer) {
	switch (peer.type()) {
	case mtpc_peerUser: return peerFromUser(peer.c_peerUser().vuser_id);
	case mtpc_peerChat: return peerFromChat(peer.c_peerChat().vchat_id);
	case mtpc_peerChannel: return peerFromChannel(peer.c_peerChannel().vchannel_id);
	}
	return 0;
}
inline MTPpeer peerToMTP(const PeerId &id) {
	if (peerIsUser(id)) {
		return MTP_peerUser(peerToBareMTPInt(id));
	} else if (peerIsChat(id)) {
		return MTP_peerChat(peerToBareMTPInt(id));
	} else if (peerIsChannel(id)) {
		return MTP_peerChannel(peerToBareMTPInt(id));
	}
	return MTP_peerUser(MTP_int(0));
}
inline PeerId peerFromMessage(const MTPmessage &msg) {
	PeerId from_id = 0, to_id = 0;
	switch (msg.type()) {
	case mtpc_message:
		from_id = msg.c_message().has_from_id() ? peerFromUser(msg.c_message().vfrom_id) : 0;
		to_id = peerFromMTP(msg.c_message().vto_id);
		break;
	case mtpc_messageService:
		from_id = msg.c_messageService().has_from_id() ? peerFromUser(msg.c_messageService().vfrom_id) : 0;
		to_id = peerFromMTP(msg.c_messageService().vto_id);
		break;
	}
	return (from_id && peerToUser(to_id) == MTP::authedId()) ? from_id : to_id;
}
inline int32 flagsFromMessage(const MTPmessage &msg) {
	switch (msg.type()) {
	case mtpc_message: return msg.c_message().vflags.v;
	case mtpc_messageService: return msg.c_messageService().vflags.v;
	}
	return 0;
}
inline int32 idFromMessage(const MTPmessage &msg) {
	switch (msg.type()) {
	case mtpc_messageEmpty: return msg.c_messageEmpty().vid.v;
	case mtpc_message: return msg.c_message().vid.v;
	case mtpc_messageService: return msg.c_messageService().vid.v;
	}
	return 0;
}

typedef uint64 PhotoId;
typedef uint64 VideoId;
typedef uint64 AudioId;
typedef uint64 DocumentId;
typedef uint64 WebPageId;
typedef int32 MsgId;
struct FullMsgId {
	FullMsgId() : channel(NoChannel), msg(0) {
	}
	FullMsgId(ChannelId channel, MsgId msg) : channel(channel), msg(msg) {
	}
	ChannelId channel;
	MsgId msg;
};
inline bool operator==(const FullMsgId &a, const FullMsgId &b) {
	return (a.channel == b.channel) && (a.msg == b.msg);
}
inline bool operator<(const FullMsgId &a, const FullMsgId &b) {
	if (a.msg < b.msg) return true;
	if (a.msg > b.msg) return false;
	return a.channel < b.channel;
}

static const MsgId ShowAtTheEndMsgId = -0x40000000;
static const MsgId SwitchAtTopMsgId = -0x3FFFFFFF;
static const MsgId ShowAtUnreadMsgId = 0;

struct NotifySettings {
	NotifySettings() : mute(0), sound("default"), previews(true), events(1) {
	}
	int32 mute;
	string sound;
	bool previews;
	int32 events;
};
typedef NotifySettings *NotifySettingsPtr;

static const NotifySettingsPtr UnknownNotifySettings = NotifySettingsPtr(0);
static const NotifySettingsPtr EmptyNotifySettings = NotifySettingsPtr(1);
extern NotifySettings globalNotifyAll, globalNotifyUsers, globalNotifyChats;
extern NotifySettingsPtr globalNotifyAllPtr, globalNotifyUsersPtr, globalNotifyChatsPtr;

inline bool isNotifyMuted(NotifySettingsPtr settings, int32 *changeIn = 0) {
	if (settings != UnknownNotifySettings && settings != EmptyNotifySettings) {
		int32 t = unixtime();
		if (settings->mute > t) {
			if (changeIn) *changeIn = settings->mute - t + 1;
			return true;
		}
	}
	if (changeIn) *changeIn = 0;
	return false;
}

style::color peerColor(int32 index);
ImagePtr userDefPhoto(int32 index);
ImagePtr chatDefPhoto(int32 index);
ImagePtr channelDefPhoto(int32 index);

static const PhotoId UnknownPeerPhotoId = 0xFFFFFFFFFFFFFFFFULL;

inline const QString &emptyUsername() {
	static QString empty;
	return empty;
}

class UserData;
class ChatData;
class ChannelData;
class PeerData {
public:

	virtual ~PeerData() {
		if (notify != UnknownNotifySettings && notify != EmptyNotifySettings) {
			delete notify;
			notify = UnknownNotifySettings;
		}
	}

	bool isUser() const {
		return peerIsUser(id);
	}
	bool isChat() const {
		return peerIsChat(id);
	}
	bool isChannel() const {
		return peerIsChannel(id);
	}
	bool isSelf() const {
		return (input.type() == mtpc_inputPeerSelf);
	}
	bool isVerified() const;
	UserData *asUser();
	const UserData *asUser() const;
	ChatData *asChat();
	const ChatData *asChat() const;
	ChannelData *asChannel();
	const ChannelData *asChannel() const;

	void updateName(const QString &newName, const QString &newNameOrPhone, const QString &newUsername);

	void fillNames();

	const Text &dialogName() const;
	const QString &shortName() const;
	const QString &userName() const;

	const PeerId id;
	int32 bareId() const {
		return int32(uint32(id & 0xFFFFFFFFULL));
	}

	TextLinkPtr lnk;

	QString name;
	Text nameText;
	typedef QSet<QString> Names;
	Names names; // for filtering
	typedef QSet<QChar> NameFirstChars;
	NameFirstChars chars;

	bool loaded;
	MTPinputPeer input;

	int32 colorIndex;
	style::color color;
	ImagePtr photo;
	PhotoId photoId;
	StorageImageLocation photoLoc;

	int32 nameVersion;

	NotifySettingsPtr notify;

private:

	PeerData(const PeerId &id);
	friend class UserData;
	friend class ChatData;
	friend class ChannelData;
};

static const uint64 UserNoAccess = 0xFFFFFFFFFFFFFFFFULL;

class PeerLink : public ITextLink {
	TEXT_LINK_CLASS(PeerLink)

public:
	PeerLink(PeerData *peer) : _peer(peer) {
	}
	void onClick(Qt::MouseButton button) const;
	PeerData *peer() const {
		return _peer;
	}

private:
	PeerData *_peer;
};

class BotCommand {
public:
	BotCommand(const QString &command, const QString &description) : command(command), _description(description) {
		
	}
	QString command;

	bool setDescription(const QString &description) {
		if (_description != description) {
			_description = description;
			_descriptionText = Text();
			return true;
		}
		return false;
	}

	const Text &descriptionText() const {
		if (_descriptionText.isEmpty() && !_description.isEmpty()) {
			_descriptionText.setText(st::mentionFont, _description, _textNameOptions);
		}
		return _descriptionText;
	}

private:
	QString _description;
	mutable Text _descriptionText;

};

struct BotInfo {
	BotInfo() : inited(false), readsAllHistory(false), cantJoinGroups(false), version(0), text(st::msgMinWidth) {
	}
	bool inited;
	bool readsAllHistory, cantJoinGroups;
	int32 version;
	QString shareText, description;
	QList<BotCommand> commands;
	Text text; // description

	QString startToken, startGroupToken;
};

enum UserBlockedStatus {
	UserBlockUnknown = 0,
	UserIsBlocked,
	UserIsNotBlocked,
};

struct PhotoData;
class UserData : public PeerData {
public:

	UserData(const PeerId &id) : PeerData(id), access(0), flags(0), onlineTill(0), contact(-1), blocked(UserBlockUnknown), photosCount(-1), botInfo(0) {
		setName(QString(), QString(), QString(), QString());
	}
	void setPhoto(const MTPUserProfilePhoto &photo);
	void setName(const QString &first, const QString &last, const QString &phoneName, const QString &username);
	void setPhone(const QString &newPhone);
	void setBotInfoVersion(int32 version);
	void setBotInfo(const MTPBotInfo &info);

	void setNameOrPhone(const QString &newNameOrPhone);

	void madeAction(); // pseudo-online

	uint64 access;

	int32 flags;
	bool isVerified() const {
		return flags & MTPDuser::flag_verified;
	}

	MTPInputUser inputUser;

	QString firstName;
	QString lastName;
	QString username;
	QString phone;
	QString nameOrPhone;
	Text phoneText;
	int32 onlineTill;
	int32 contact; // -1 - not contact, cant add (self, empty, deleted, foreign), 0 - not contact, can add (request), 1 - contact
	UserBlockedStatus blocked;

	typedef QList<PhotoData*> Photos;
	Photos photos;
	int32 photosCount; // -1 not loaded, 0 all loaded

	BotInfo *botInfo;
};

class ChatData : public PeerData {
public:

	ChatData(const PeerId &id) : PeerData(id), inputChat(MTP_int(bareId())), count(0), date(0), version(0), creator(0), inviterForSpamReport(0), flags(0), isForbidden(false), botStatus(0) {
	}
	void setPhoto(const MTPChatPhoto &photo, const PhotoId &phId = UnknownPeerPhotoId);
	void invalidateParticipants() {
		participants = ChatData::Participants();
		admins = ChatData::Admins();
		flags &= ~MTPDchat::flag_admin;
		invitedByMe = ChatData::InvitedByMe();
		botStatus = 0;
	}
	bool noParticipantInfo() const {
		return (count > 0 || amIn()) && participants.isEmpty();
	}

	MTPint inputChat;

	int32 count;
	int32 date;
	int32 version;
	int32 creator;
	int32 inviterForSpamReport; // > 0 - user who invited me to chat in unread service msg, < 0 - have outgoing message

	int32 flags;
	bool isForbidden;
	bool amIn() const {
		return !isForbidden && !haveLeft() && !wasKicked();
	}
	bool canEdit() const {
		return amCreator() || (adminsEnabled() ? amAdmin() : amIn());
	}
	bool haveLeft() const {
		return flags & MTPDchat::flag_left;
	}
	bool wasKicked() const {
		return flags & MTPDchat::flag_kicked;
	}
	bool adminsEnabled() const {
		return flags & MTPDchat::flag_admins_enabled;
	}
	bool amCreator() const {
		return flags & MTPDchat::flag_creator;
	}
	bool amAdmin() const {
		return flags & MTPDchat::flag_admin;
	}
	typedef QMap<UserData*, int32> Participants;
	Participants participants;
	typedef QMap<UserData*, bool> InvitedByMe;
	InvitedByMe invitedByMe;
	typedef QMap<UserData*, bool> Admins;
	Admins admins;
	typedef QList<UserData*> LastAuthors;
	LastAuthors lastAuthors;
	typedef QMap<PeerData*, bool> MarkupSenders;
	MarkupSenders markupSenders;
	int32 botStatus; // -1 - no bots, 0 - unknown, 1 - one bot, that sees all history, 2 - other
//	ImagePtr photoFull;
	QString invitationUrl;
};

enum PtsSkippedQueue {
	SkippedUpdate,
	SkippedUpdates,
};
class PtsWaiter {
public:

	PtsWaiter() :
		_good(0),
		_last(0),
		_count(0),
		_applySkippedLevel(0),
		_requesting(false),
		_waitingForSkipped(false),
		_waitingForShortPoll(false) {
	}
	void init(int32 pts) {
		_good = _last = _count = pts;
		clearSkippedUpdates();
	}
	bool inited() const {
		return _good > 0;
	}
	void setRequesting(bool isRequesting) {
		_requesting = isRequesting;
		if (_requesting) {
			clearSkippedUpdates();
		}
	}
	bool requesting() const {
		return _requesting;
	}
	bool waitingForSkipped() const {
		return _waitingForSkipped;
	}
	bool waitingForShortPoll() const {
		return _waitingForShortPoll;
	}
	void setWaitingForSkipped(ChannelData *channel, int32 ms); // < 0 - not waiting
	void setWaitingForShortPoll(ChannelData *channel, int32 ms); // < 0 - not waiting
	int32 current() const{
		return _good;
	}
	bool updated(ChannelData *channel, int32 pts, int32 count);
	bool updated(ChannelData *channel, int32 pts, int32 count, const MTPUpdates &updates);
	bool updated(ChannelData *channel, int32 pts, int32 count, const MTPUpdate &update);
	void applySkippedUpdates(ChannelData *channel);
	void clearSkippedUpdates();

private:
	bool check(ChannelData *channel, int32 pts, int32 count); // return false if need to save that update and apply later
	uint64 ptsKey(PtsSkippedQueue queue);
	void checkForWaiting(ChannelData *channel);
	QMap<uint64, PtsSkippedQueue> _queue;
	QMap<uint64, MTPUpdate> _updateQueue;
	QMap<uint64, MTPUpdates> _updatesQueue;
	int32 _good, _last, _count;
	int32 _applySkippedLevel;
	bool _requesting, _waitingForSkipped, _waitingForShortPoll;
};

class ChannelData : public PeerData {
public:

	ChannelData(const PeerId &id) : PeerData(id), access(0), inputChannel(MTP_inputChannel(MTP_int(bareId()), MTP_long(0))), count(1), adminsCount(1), date(0), version(0), flags(0), flagsFull(0), isForbidden(true), botStatus(-1), inviter(0), _lastFullUpdate(0) {
		setName(QString(), QString());
	}
	void setPhoto(const MTPChatPhoto &photo, const PhotoId &phId = UnknownPeerPhotoId);
	void setName(const QString &name, const QString &username);

	void updateFull(bool force = false);
	void fullUpdated();

	uint64 access;

	MTPinputChannel inputChannel;

	QString username, about;

	int32 count, adminsCount;
	int32 date;
	int32 version;
	int32 flags, flagsFull;
	bool isBroadcast() const {
		return flags & MTPDchannel::flag_broadcast;
	}
	bool isPublic() const {
		return flags & MTPDchannel::flag_username;
	}
	bool amCreator() const {
		return flags & MTPDchannel::flag_creator;
	}
	bool amEditor() const {
		return flags & MTPDchannel::flag_editor;
	}
	bool amModerator() const {
		return flags & MTPDchannel::flag_moderator;
	}
	bool haveLeft() const {
		return flags & MTPDchannel::flag_left;
	}
	bool wasKicked() const {
		return flags & MTPDchannel::flag_kicked;
	}
	bool amIn() const {
		return !isForbidden && !haveLeft() && !wasKicked();
	}
	bool canPublish() const {
		return amCreator() || amEditor();
	}
	bool canViewParticipants() const {
		return flagsFull & MTPDchannelFull::flag_can_view_participants;
	}
	bool isForbidden;
	bool isVerified() const {
		return flags & MTPDchannel::flag_verified;
	}

	int32 botStatus; // -1 - no bots, 0 - unknown, 1 - one bot, that sees all history, 2 - other
//	ImagePtr photoFull;
	QString invitationUrl;

	int32 inviter; // > 0 - user who invited me to channel, < 0 - not in channel
	QDateTime inviteDate;

	void ptsInit(int32 pts) {
		_ptsWaiter.init(pts);
	}
	void ptsReceived(int32 pts) {
		if (_ptsWaiter.updated(this, pts, 0)) {
			_ptsWaiter.applySkippedUpdates(this);
		}
	}
	bool ptsUpdated(int32 pts, int32 count) {
		return _ptsWaiter.updated(this, pts, count);
	}
	bool ptsUpdated(int32 pts, int32 count, const MTPUpdate &update) {
		return _ptsWaiter.updated(this, pts, count, update);
	}
	int32 pts() const {
		return _ptsWaiter.current();
	}
	bool ptsInited() const {
		return _ptsWaiter.inited();
	}
	bool ptsRequesting() const {
		return _ptsWaiter.requesting();
	}
	void ptsSetRequesting(bool isRequesting) {
		return _ptsWaiter.setRequesting(isRequesting);
	}
	void ptsApplySkippedUpdates() {
		return _ptsWaiter.applySkippedUpdates(this);
	}
	void ptsWaitingForShortPoll(int32 ms) { // < 0 - not waiting
		return _ptsWaiter.setWaitingForShortPoll(this, ms);
	}

private:

	PtsWaiter _ptsWaiter;
	uint64 _lastFullUpdate;
};

inline UserData *PeerData::asUser() {
	return isUser() ? static_cast<UserData*>(this) : 0;
}
inline const UserData *PeerData::asUser() const {
	return isUser() ? static_cast<const UserData*>(this) : 0;
}
inline ChatData *PeerData::asChat() {
	return isChat() ? static_cast<ChatData*>(this) : 0;
}
inline const ChatData *PeerData::asChat() const {
	return isChat() ? static_cast<const ChatData*>(this) : 0;
}
inline ChannelData *PeerData::asChannel() {
	return isChannel() ? static_cast<ChannelData*>(this) : 0;
}
inline const ChannelData *PeerData::asChannel() const {
	return isChannel() ? static_cast<const ChannelData*>(this) : 0;
}
inline const Text &PeerData::dialogName() const {
	return (isUser() && !asUser()->phoneText.isEmpty()) ? asUser()->phoneText : nameText;
}
inline const QString &PeerData::shortName() const {
	return isUser() ? asUser()->firstName : name;
}
inline const QString &PeerData::userName() const {
	return isUser() ? asUser()->username : (isChannel() ? asChannel()->username : emptyUsername());
}
inline bool PeerData::isVerified() const {
	return isUser() ? asUser()->isVerified() : (isChannel() ? asChannel()->isVerified() : false);
}

inline int32 newMessageFlags(PeerData *p) {
	return p->isSelf() ? 0 : (((p->isChat() || (p->isUser() && !p->asUser()->botInfo)) ? MTPDmessage::flag_unread : 0) | MTPDmessage::flag_out);
}

typedef QMap<char, QPixmap> PreparedPhotoThumbs;
struct PhotoData {
	PhotoData(const PhotoId &id, const uint64 &access = 0, int32 date = 0, const ImagePtr &thumb = ImagePtr(), const ImagePtr &medium = ImagePtr(), const ImagePtr &full = ImagePtr()) :
		id(id), access(access), date(date), thumb(thumb), medium(medium), full(full), peer(0) {
	}
	void forget() {
		thumb->forget();
		replyPreview->forget();
		medium->forget();
		full->forget();
	}
	ImagePtr makeReplyPreview() {
		if (replyPreview->isNull() && !thumb->isNull()) {
			if (thumb->loaded()) {
				int w = thumb->width(), h = thumb->height();
				if (w <= 0) w = 1;
				if (h <= 0) h = 1;
				replyPreview = ImagePtr(w > h ? thumb->pix(w * st::msgReplyBarSize.height() / h, st::msgReplyBarSize.height()) : thumb->pix(st::msgReplyBarSize.height()), "PNG");
			} else {
				thumb->load();
			}
		}
		return replyPreview;
	}
	PhotoId id;
	uint64 access;
	int32 date;
	ImagePtr thumb, replyPreview;
	ImagePtr medium;
	ImagePtr full;

	PeerData *peer; // for chat and channel photos connection
	// geo, caption

	int32 cachew;
	QPixmap cache;
};

class PhotoLink : public ITextLink {
	TEXT_LINK_CLASS(PhotoLink)

public:
	PhotoLink(PhotoData *photo) : _photo(photo), _peer(0) {
	}
	PhotoLink(PhotoData *photo, PeerData *peer) : _photo(photo), _peer(peer) {
	}
	void onClick(Qt::MouseButton button) const;
	PhotoData *photo() const {
		return _photo;
	}
	PeerData *peer() const {
		return _peer;
	}

private:
	PhotoData *_photo;
	PeerData *_peer;
};

enum FileStatus {
	FileFailed = -1,
	FileUploading = 0,
	FileReady = 1,
};

struct VideoData {
	VideoData(const VideoId &id, const uint64 &access = 0, int32 date = 0, int32 duration = 0, int32 w = 0, int32 h = 0, const ImagePtr &thumb = ImagePtr(), int32 dc = 0, int32 size = 0);

	void forget() {
		thumb->forget();
		replyPreview->forget();
	}

	void save(const QString &toFile);

	void cancel(bool beforeDownload = false) {
		mtpFileLoader *l = loader;
		loader = 0;
		if (l) {
			l->cancel();
			l->deleteLater();
			l->rpcInvalidate();
		}
		location = FileLocation();
		if (!beforeDownload) {
			openOnSave = 0;
			openOnSaveMsgId = FullMsgId();
		}
	}

	void finish() {
		if (loader->done()) {
			location = FileLocation(mtpToStorageType(loader->fileType()), loader->fileName());
		}
		loader->deleteLater();
		loader->rpcInvalidate();
		loader = 0;
	}

	QString already(bool check = false);

	VideoId id;
	uint64 access;
	int32 date;
	int32 duration;
	int32 w, h;
	ImagePtr thumb, replyPreview;
	int32 dc, size;
	// geo, caption

	FileStatus status;
	int32 uploadOffset;

	mtpTypeId fileType;
	int32 openOnSave;
	FullMsgId openOnSaveMsgId;
	mtpFileLoader *loader;
	FileLocation location;
};

class VideoLink : public ITextLink {
	TEXT_LINK_CLASS(VideoLink)

public:
	VideoLink(VideoData *video) : _video(video) {
	}
	VideoData *video() const {
		return _video;
	}

private:
	VideoData *_video;
};

class VideoSaveLink : public VideoLink {
	TEXT_LINK_CLASS(VideoSaveLink)

public:
	VideoSaveLink(VideoData *video) : VideoLink(video) {
	}
	static void doSave(VideoData *video, bool forceSavingAs = false);
	void onClick(Qt::MouseButton button) const;
};

class VideoOpenLink : public VideoLink {
	TEXT_LINK_CLASS(VideoOpenLink)

public:
	VideoOpenLink(VideoData *video) : VideoLink(video) {
	}
	void onClick(Qt::MouseButton button) const;
};

class VideoCancelLink : public VideoLink {
	TEXT_LINK_CLASS(VideoCancelLink)

public:
	VideoCancelLink(VideoData *video) : VideoLink(video) {
	}
	void onClick(Qt::MouseButton button) const;
};

struct AudioData {
	AudioData(const AudioId &id, const uint64 &access = 0, int32 date = 0, const QString &mime = QString(), int32 duration = 0, int32 dc = 0, int32 size = 0);

	void forget() {
	}

	void save(const QString &toFile);

	void cancel(bool beforeDownload = false) {
		mtpFileLoader *l = loader;
		loader = 0;
		if (l) {
			l->cancel();
			l->deleteLater();
			l->rpcInvalidate();
		}
		location = FileLocation();
		if (!beforeDownload) {
			openOnSave = 0;
			openOnSaveMsgId = FullMsgId();
		}
	}

	void finish() {
		if (loader->done()) {
			location = FileLocation(mtpToStorageType(loader->fileType()), loader->fileName());
			data = loader->bytes();
		}
		loader->deleteLater();
		loader->rpcInvalidate();
		loader = 0;
	}

	QString already(bool check = false);

	AudioId id;
	uint64 access;
	int32 date;
	QString mime;
	int32 duration;
	int32 dc;
	int32 size;

	FileStatus status;
	int32 uploadOffset;

	int32 openOnSave;
	FullMsgId openOnSaveMsgId;
	mtpFileLoader *loader;
	FileLocation location;
	QByteArray data;
	int32 md5[8];
};

struct AudioMsgId {
	AudioMsgId() : audio(0) {
	}
	AudioMsgId(AudioData *audio, const FullMsgId &msgId) : audio(audio), msgId(msgId) {
	}
	AudioMsgId(AudioData *audio, ChannelId channelId, MsgId msgId) : audio(audio), msgId(channelId, msgId) {
	}
	operator bool() const {
		return audio;
	}
	AudioData *audio;
	FullMsgId msgId;
};
inline bool operator<(const AudioMsgId &a, const AudioMsgId &b) {
	return quintptr(a.audio) < quintptr(b.audio) || (quintptr(a.audio) == quintptr(b.audio) && a.msgId < b.msgId);
}
inline bool operator==(const AudioMsgId &a, const AudioMsgId &b) {
	return a.audio == b.audio && a.msgId == b.msgId;
}
inline bool operator!=(const AudioMsgId &a, const AudioMsgId &b) {
	return !(a == b);
}

class AudioLink : public ITextLink {
	TEXT_LINK_CLASS(AudioLink)

public:
	AudioLink(AudioData *audio) : _audio(audio) {
	}
	AudioData *audio() const {
		return _audio;
	}

private:
	AudioData *_audio;
};

class AudioSaveLink : public AudioLink {
	TEXT_LINK_CLASS(AudioSaveLink)

public:
	AudioSaveLink(AudioData *audio) : AudioLink(audio) {
	}
	static void doSave(AudioData *audio, bool forceSavingAs = false);
	void onClick(Qt::MouseButton button) const;
};

class AudioOpenLink : public AudioLink {
	TEXT_LINK_CLASS(AudioOpenLink)

public:
	AudioOpenLink(AudioData *audio) : AudioLink(audio) {
	}
	void onClick(Qt::MouseButton button) const;
};

class AudioCancelLink : public AudioLink {
	TEXT_LINK_CLASS(AudioCancelLink)

public:
	AudioCancelLink(AudioData *audio) : AudioLink(audio) {
	}
	void onClick(Qt::MouseButton button) const;
};

enum DocumentType {
	FileDocument     = 0,
	VideoDocument    = 1,
	SongDocument     = 2,
	StickerDocument  = 3,
	AnimatedDocument = 4,
};

struct DocumentAdditionalData {
};

struct StickerData : public DocumentAdditionalData {
	StickerData() : set(MTP_inputStickerSetEmpty()) {
	}
	ImagePtr img;
	QString alt;

	MTPInputStickerSet set;
	bool setInstalled() const;

	StorageImageLocation loc; // doc thumb location
};

struct SongData : public DocumentAdditionalData {
	SongData() : duration(0) {
	}
	int32 duration;
	QString title, performer;
};

struct DocumentData {
	DocumentData(const DocumentId &id, const uint64 &access = 0, int32 date = 0, const QVector<MTPDocumentAttribute> &attributes = QVector<MTPDocumentAttribute>(), const QString &mime = QString(), const ImagePtr &thumb = ImagePtr(), int32 dc = 0, int32 size = 0);
	void setattributes(const QVector<MTPDocumentAttribute> &attributes);

	void forget() {
		thumb->forget();
		if (sticker()) sticker()->img->forget();
		replyPreview->forget();
	}
	ImagePtr makeReplyPreview() {
		if (replyPreview->isNull() && !thumb->isNull()) {
			if (thumb->loaded()) {
				int w = thumb->width(), h = thumb->height();
				if (w <= 0) w = 1;
				if (h <= 0) h = 1;
				replyPreview = ImagePtr(w > h ? thumb->pix(w * st::msgReplyBarSize.height() / h, st::msgReplyBarSize.height()) : thumb->pix(st::msgReplyBarSize.height()), "PNG");
			} else {
				thumb->load();
			}
		}
		return replyPreview;
	}

	void save(const QString &toFile);

	void cancel(bool beforeDownload = false) {
		mtpFileLoader *l = loader;
		loader = 0;
		if (l) {
			l->cancel();
			l->deleteLater();
			l->rpcInvalidate();
		}
		location = FileLocation();
		if (!beforeDownload) {
			openOnSave = 0;
			openOnSaveMsgId = FullMsgId();
		}
	}

	void finish() {
		if (loader->done()) {
			location = FileLocation(mtpToStorageType(loader->fileType()), loader->fileName());
			data = loader->bytes();
			if (sticker() && !loader->imagePixmap().isNull()) {
				sticker()->img = ImagePtr(data, loader->imageFormat(), loader->imagePixmap());
			}
		}
		loader->deleteLater();
		loader->rpcInvalidate();
		loader = 0;
	}
	~DocumentData() {
		delete _additional;
	}

	QString already(bool check = false);
	StickerData *sticker() {
		return (type == StickerDocument) ? static_cast<StickerData*>(_additional) : 0;
	}
	SongData *song() {
		return (type == SongDocument) ? static_cast<SongData*>(_additional) : 0;
	}

	DocumentId id;
	DocumentType type;
	QSize dimensions;
	uint64 access;
	int32 date;
	QString name, mime;
	ImagePtr thumb, replyPreview;
	int32 dc;
	int32 size;

	FileStatus status;
	int32 uploadOffset;

	int32 openOnSave;
	FullMsgId openOnSaveMsgId;
	mtpFileLoader *loader;
	FileLocation location;

	QByteArray data;
	DocumentAdditionalData *_additional;

	int32 md5[8];
};

struct SongMsgId {
	SongMsgId() : song(0) {
	}
	SongMsgId(DocumentData *song, const FullMsgId &msgId) : song(song), msgId(msgId) {
	}
	SongMsgId(DocumentData *song, ChannelId channelId, MsgId msgId) : song(song), msgId(channelId, msgId) {
	}
	operator bool() const {
		return song;
	}
	DocumentData *song;
	FullMsgId msgId;
};
inline bool operator<(const SongMsgId &a, const SongMsgId &b) {
	return quintptr(a.song) < quintptr(b.song) || (quintptr(a.song) == quintptr(b.song) && a.msgId < b.msgId);
}
inline bool operator==(const SongMsgId &a, const SongMsgId &b) {
	return a.song == b.song && a.msgId == b.msgId;
}
inline bool operator!=(const SongMsgId &a, const SongMsgId &b) {
	return !(a == b);
}

class DocumentLink : public ITextLink {
	TEXT_LINK_CLASS(DocumentLink)

public:
	DocumentLink(DocumentData *document) : _document(document) {
	}
	DocumentData *document() const {
		return _document;
	}

private:
	DocumentData *_document;
};

class DocumentSaveLink : public DocumentLink {
	TEXT_LINK_CLASS(DocumentSaveLink)

public:
	DocumentSaveLink(DocumentData *document) : DocumentLink(document) {
	}
	static void doSave(DocumentData *document, bool forceSavingAs = false);
	void onClick(Qt::MouseButton button) const;
};

class DocumentOpenLink : public DocumentLink {
	TEXT_LINK_CLASS(DocumentOpenLink)

public:
	DocumentOpenLink(DocumentData *document) : DocumentLink(document) {
	}
	static void doOpen(DocumentData *document);
	void onClick(Qt::MouseButton button) const;
};

class DocumentCancelLink : public DocumentLink {
	TEXT_LINK_CLASS(DocumentCancelLink)

public:
	DocumentCancelLink(DocumentData *document) : DocumentLink(document) {
	}
	void onClick(Qt::MouseButton button) const;
};

enum WebPageType {
	WebPagePhoto,
	WebPageVideo,
	WebPageProfile,
	WebPageArticle
};
inline WebPageType toWebPageType(const QString &type) {
	if (type == qstr("photo")) return WebPagePhoto;
	if (type == qstr("video")) return WebPageVideo;
	if (type == qstr("profile")) return WebPageProfile;
	return WebPageArticle;
}

struct WebPageData {
	WebPageData(const WebPageId &id, WebPageType type = WebPageArticle, const QString &url = QString(), const QString &displayUrl = QString(), const QString &siteName = QString(), const QString &title = QString(), const QString &description = QString(), PhotoData *photo = 0, DocumentData *doc = 0, int32 duration = 0, const QString &author = QString(), int32 pendingTill = -1);
	
	void forget() {
		if (photo) photo->forget();
	}

	WebPageId id;
	WebPageType type;
	QString url, displayUrl, siteName, title, description;
	int32 duration;
	QString author;
	PhotoData *photo;
	DocumentData *doc;
	int32 pendingTill;
};

QString saveFileName(const QString &title, const QString &filter, const QString &prefix, QString name, bool savingAs, const QDir &dir = QDir());
MsgId clientMsgId();

struct MessageCursor {
	MessageCursor() : position(0), anchor(0), scroll(QFIXED_MAX) {
	}
	MessageCursor(int position, int anchor, int scroll) : position(position), anchor(anchor), scroll(scroll) {
	}
	MessageCursor(const QTextEdit &edit) {
		fillFrom(edit);
	}
	void fillFrom(const QTextEdit &edit) {
		QTextCursor c = edit.textCursor();
		position = c.position();
		anchor = c.anchor();
		QScrollBar *s = edit.verticalScrollBar();
		scroll = s ? s->value() : QFIXED_MAX;
	}
	void applyTo(QTextEdit &edit, bool *lock = 0) {
		if (lock) *lock = true;
		QTextCursor c = edit.textCursor();
		c.setPosition(anchor, QTextCursor::MoveAnchor);
		c.setPosition(position, QTextCursor::KeepAnchor);
		edit.setTextCursor(c);
		QScrollBar *s = edit.verticalScrollBar();
		if (s) s->setValue(scroll);
		if (lock) *lock = false;
	}
	int position, anchor, scroll;
};