init

Telegram/SourceFiles/data/data_forum.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 "dialogs/dialogs_main_list.h"
+
+class History;
+class ChannelData;
+
+namespace Main {
+class Session;
+} // namespace Main
+
+namespace Window {
+class SessionController;
+} // namespace Window;
+
+namespace Data {
+
+class Session;
+
+struct ForumOffsets {
+	TimeId date = 0;
+	MsgId id = 0;
+	MsgId topicId = 0;
+
+	friend inline constexpr auto operator<=>(
+		ForumOffsets,
+		ForumOffsets) = default;
+};
+
+class Forum final {
+public:
+	explicit Forum(not_null<History*> history);
+	~Forum();
+
+	[[nodiscard]] Session &owner() const;
+	[[nodiscard]] Main::Session &session() const;
+	[[nodiscard]] not_null<PeerData*> peer() const;
+	[[nodiscard]] not_null<History*> history() const;
+	[[nodiscard]] UserData *bot() const;
+	[[nodiscard]] ChannelData *channel() const;
+	[[nodiscard]] not_null<Dialogs::MainList*> topicsList();
+	[[nodiscard]] rpl::producer<> destroyed() const;
+	[[nodiscard]] auto topicDestroyed() const
+		-> rpl::producer<not_null<ForumTopic*>>;
+
+	void preloadTopics();
+	void reloadTopics();
+	void requestTopics();
+	[[nodiscard]] rpl::producer<> chatsListChanges() const;
+	[[nodiscard]] rpl::producer<> chatsListLoadedEvents() const;
+
+	void requestTopic(MsgId rootId, Fn<void()> done = nullptr);
+	ForumTopic *applyTopicAdded(
+		MsgId rootId,
+		const QString &title,
+		int32 colorId,
+		DocumentId iconId,
+		PeerId creatorId,
+		TimeId date,
+		bool my);
+	void applyTopicDeleted(MsgId rootId);
+	[[nodiscard]] ForumTopic *topicFor(MsgId rootId);
+	[[nodiscard]] ForumTopic *enforceTopicFor(MsgId rootId);
+	[[nodiscard]] bool topicDeleted(MsgId rootId) const;
+
+	void applyReceivedTopics(
+		const MTPmessages_ForumTopics &topics,
+		ForumOffsets &updateOffsets);
+	void applyReceivedTopics(
+		const MTPmessages_ForumTopics &topics,
+		Fn<void(not_null<ForumTopic*>)> callback = nullptr);
+	void applyReceivedTopics(
+		const MTPVector<MTPForumTopic> &topics,
+		Fn<void(not_null<ForumTopic*>)> callback = nullptr);
+
+	[[nodiscard]] MsgId reserveCreatingId(
+		const QString &title,
+		int32 colorId,
+		DocumentId iconId);
+	void discardCreatingId(MsgId rootId);
+	[[nodiscard]] bool creating(MsgId rootId) const;
+	void created(MsgId rootId, MsgId realId);
+
+	void clearAllUnreadMentions();
+	void clearAllUnreadReactions();
+	void enumerateTopics(Fn<void(not_null<ForumTopic*>)> action) const;
+
+	void listMessageChanged(HistoryItem *from, HistoryItem *to);
+	[[nodiscard]] int recentTopicsListVersion() const;
+	void recentTopicsInvalidate(not_null<ForumTopic*> topic);
+	[[nodiscard]] auto recentTopics() const
+		-> const std::vector<not_null<ForumTopic*>> &;
+
+	void saveActiveSubsectionThread(not_null<Thread*> thread);
+	[[nodiscard]] Thread *activeSubsectionThread() const;
+
+	void markUnreadCountsUnknown(MsgId readTillId);
+	void updateUnreadCounts(
+		MsgId readTillId,
+		const base::flat_map<not_null<ForumTopic*>, int> &counts);
+
+	[[nodiscard]] rpl::lifetime &lifetime() {
+		return _lifetime;
+	}
+
+private:
+	struct TopicRequest {
+		mtpRequestId id = 0;
+		std::vector<Fn<void()>> callbacks;
+	};
+
+	void reorderLastTopics();
+	void requestSomeStale();
+	void finishTopicRequest(MsgId rootId);
+
+	const not_null<History*> _history;
+
+	base::flat_map<MsgId, std::unique_ptr<ForumTopic>> _topics;
+	base::flat_set<MsgId> _topicsDeleted;
+	rpl::event_stream<not_null<ForumTopic*>> _topicDestroyed;
+	Dialogs::MainList _topicsList;
+
+	base::flat_map<MsgId, TopicRequest> _topicRequests;
+	base::flat_set<MsgId> _staleRootIds;
+	mtpRequestId _staleRequestId = 0;
+
+	mtpRequestId _requestId = 0;
+	ForumOffsets _offset;
+
+	base::flat_set<MsgId> _creatingRootIds;
+
+	std::vector<not_null<ForumTopic*>> _lastTopics;
+	int _lastTopicsVersion = 0;
+
+	ForumTopic *_activeSubsectionTopic = nullptr;
+
+	rpl::event_stream<> _chatsListChanges;
+	rpl::event_stream<> _chatsListLoadedEvents;
+
+	rpl::lifetime _lifetime;
+
+};
+
+} // namespace Data