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Telegram/SourceFiles/api/api_messages_search.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/qt/qt_compare.h"
+#include "data/data_message_reaction_id.h"
+
+class HistoryItem;
+class History;
+class PeerData;
+
+namespace Data {
+struct ReactionId;
+} // namespace Data
+
+namespace Api {
+
+struct FoundMessages {
+	int total = -1;
+	MessageIdsList messages;
+	QString nextToken;
+};
+
+class MessagesSearch final {
+public:
+	struct Request {
+		QString query;
+		PeerData *from = nullptr;
+		std::vector<Data::ReactionId> tags;
+		MsgId topMsgId;
+
+		friend inline bool operator==(
+			const Request &,
+			const Request &) = default;
+		friend inline auto operator<=>(
+			const Request &,
+			const Request &) = default;
+	};
+
+	explicit MessagesSearch(not_null<History*> history);
+	~MessagesSearch();
+
+	void searchMessages(Request request);
+	void searchMore();
+
+	[[nodiscard]] rpl::producer<FoundMessages> messagesFounds() const;
+
+private:
+	using TLMessages = MTPmessages_Messages;
+	void searchRequest();
+	void searchReceived(
+		const TLMessages &result,
+		mtpRequestId requestId,
+		const QString &nextToken);
+
+	const not_null<History*> _history;
+
+	base::flat_map<QString, TLMessages> _cacheOfStartByToken;
+
+	Request _request;
+	MsgId _offsetId;
+
+	int _searchInHistoryRequest = 0; // Not real mtpRequestId.
+	mtpRequestId _requestId = 0;
+
+	rpl::event_stream<FoundMessages> _messagesFounds;
+
+};
+
+} // namespace Api