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Telegram/SourceFiles/data/data_saved_sublist.h

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+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#pragma once
+
+#include "base/timer.h"
+#include "data/data_thread.h"
+#include "dialogs/ui/dialogs_message_view.h"
+
+class PeerData;
+class History;
+
+namespace Data {
+
+class Session;
+class Histories;
+class SavedMessages;
+struct MessagePosition;
+struct MessageUpdate;
+struct SublistReadTillUpdate;
+struct MessagesSlice;
+
+class SavedSublist final : public Data::Thread {
+public:
+	SavedSublist(
+		not_null<SavedMessages*> parent,
+		not_null<PeerData*> sublistPeer);
+	~SavedSublist();
+
+	[[nodiscard]] bool inMonoforum() const;
+	[[nodiscard]] bool isFeeRemoved() const;
+	void toggleFeeRemoved(bool feeRemoved);
+
+	void apply(const SublistReadTillUpdate &update);
+	void apply(const MessageUpdate &update);
+	void applyDifferenceTooLong();
+	bool removeOne(not_null<HistoryItem*> item);
+
+	[[nodiscard]] rpl::producer<MessagesSlice> source(
+		MessagePosition aroundId,
+		int limitBefore,
+		int limitAfter);
+
+	[[nodiscard]] not_null<SavedMessages*> parent() const;
+	[[nodiscard]] not_null<History*> owningHistory() override;
+	[[nodiscard]] ChannelData *parentChat() const;
+	[[nodiscard]] not_null<PeerData*> sublistPeer() const;
+	[[nodiscard]] bool isHiddenAuthor() const;
+	[[nodiscard]] rpl::producer<> destroyed() const;
+
+	void applyMaybeLast(not_null<HistoryItem*> item);
+	void applyItemAdded(not_null<HistoryItem*> item);
+	void applyItemRemoved(MsgId id);
+
+	[[nodiscard]] rpl::producer<> changes() const;
+	[[nodiscard]] std::optional<int> fullCount() const;
+	[[nodiscard]] rpl::producer<int> fullCountValue() const;
+	void loadFullCount();
+
+	[[nodiscard]] bool unreadCountKnown() const;
+	[[nodiscard]] int unreadCountCurrent() const;
+	[[nodiscard]] int displayedUnreadCount() const;
+	[[nodiscard]] rpl::producer<std::optional<int>> unreadCountValue() const;
+	void setUnreadMark(bool unread);
+
+	void applyMonoforumDialog(
+		const MTPDmonoForumDialog &dialog,
+		not_null<HistoryItem*> topItem);
+	void readTillEnd();
+	void requestChatListMessage();
+
+	TimeId adjustedChatListTimeId() const override;
+
+	int fixedOnTopIndex() const override;
+	bool shouldBeInChatList() const override;
+	Dialogs::UnreadState chatListUnreadState() const override;
+	Dialogs::BadgesState chatListBadgesState() const override;
+	HistoryItem *chatListMessage() const override;
+	bool chatListMessageKnown() const override;
+	const QString &chatListName() const override;
+	const QString &chatListNameSortKey() const override;
+	int chatListNameVersion() const override;
+	const base::flat_set<QString> &chatListNameWords() const override;
+	const base::flat_set<QChar> &chatListFirstLetters() const override;
+
+	void hasUnreadMentionChanged(bool has) override;
+	void hasUnreadReactionChanged(bool has) override;
+
+	[[nodiscard]] HistoryItem *lastMessage() const;
+	[[nodiscard]] HistoryItem *lastServerMessage() const;
+	[[nodiscard]] bool lastMessageKnown() const;
+	[[nodiscard]] bool lastServerMessageKnown() const;
+	[[nodiscard]] MsgId lastKnownServerMessageId() const;
+
+	void setInboxReadTill(MsgId readTillId, std::optional<int> unreadCount);
+	[[nodiscard]] MsgId inboxReadTillId() const;
+	[[nodiscard]] MsgId computeInboxReadTillFull() const;
+
+	void setOutboxReadTill(MsgId readTillId);
+	[[nodiscard]] MsgId computeOutboxReadTillFull() const;
+
+	[[nodiscard]] bool isServerSideUnread(
+		not_null<const HistoryItem*> item) const override;
+
+	void requestUnreadCount();
+
+	void readTill(not_null<HistoryItem*> item);
+	void readTill(MsgId tillId);
+
+	void chatListPreloadData() override;
+	void paintUserpic(
+		Painter &p,
+		Ui::PeerUserpicView &view,
+		const Dialogs::Ui::PaintContext &context) const override;
+
+	[[nodiscard]] auto sendActionPainter()
+		-> HistoryView::SendActionPainter* override;
+
+private:
+	struct Viewer;
+
+	enum class Flag : uchar {
+		ResolveChatListMessage = (1 << 0),
+		InMonoforum = (1 << 1),
+		FeeRemoved = (1 << 2),
+	};
+	friend inline constexpr bool is_flag_type(Flag) { return true; }
+	using Flags = base::flags<Flag>;
+
+	[[nodiscard]] Histories &histories();
+
+	void subscribeToUnreadChanges();
+	[[nodiscard]] Dialogs::UnreadState unreadStateFor(
+		int count,
+		bool known) const;
+	void setLastMessage(HistoryItem *item);
+	void setLastServerMessage(HistoryItem *item);
+	void setChatListMessage(HistoryItem *item);
+	void allowChatListMessageResolve();
+	void resolveChatListMessageGroup();
+	void growLastKnownServerMessageId(MsgId id);
+
+	void changeUnreadCountByMessage(MsgId id, int delta);
+	void setUnreadCount(std::optional<int> count);
+	void readTill(MsgId tillId, HistoryItem *tillIdItem);
+	void checkReadTillEnd();
+	void sendReadTillRequest();
+	void reloadUnreadCountIfNeeded();
+
+	[[nodiscard]] bool buildFromData(not_null<Viewer*> viewer);
+	[[nodiscard]] bool applyUpdate(const MessageUpdate &update);
+	void appendClientSideMessages(MessagesSlice &slice);
+	[[nodiscard]] std::optional<int> computeUnreadCountLocally(
+		MsgId afterId) const;
+	bool processMessagesIsEmpty(const MTPmessages_Messages &result);
+	void loadAround(MsgId id);
+	void loadBefore();
+	void loadAfter();
+
+	const not_null<SavedMessages*> _parent;
+	const not_null<History*> _sublistHistory;
+
+	MsgId _lastKnownServerMessageId = 0;
+
+	std::vector<MsgId> _list;
+	std::optional<int> _skippedBefore;
+	std::optional<int> _skippedAfter;
+	rpl::variable<std::optional<int>> _fullCount;
+	rpl::event_stream<> _listChanges;
+	rpl::event_stream<> _instantChanges;
+	std::optional<MsgId> _loadingAround;
+	rpl::variable<std::optional<int>> _unreadCount;
+	MsgId _inboxReadTillId = 0;
+	MsgId _outboxReadTillId = 0;
+	Flags _flags;
+
+	std::optional<HistoryItem*> _lastMessage;
+	std::optional<HistoryItem*> _lastServerMessage;
+	std::optional<HistoryItem*> _chatListMessage;
+	base::flat_set<FullMsgId> _requestedGroups;
+	int _beforeId = 0;
+	int _afterId = 0;
+
+	base::Timer _readRequestTimer;
+	mtpRequestId _readRequestId = 0;
+	MsgId _sentReadTill = 0;
+
+	mtpRequestId _reloadUnreadCountRequestId = 0;
+
+	rpl::lifetime _lifetime;
+
+};
+
+} // namespace Data