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Telegram/SourceFiles/api/api_messages_search_merged.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 "api/api_messages_search.h"
+
+class History;
+class PeerData;
+
+namespace Data {
+struct ReactionId;
+} // namespace Data
+
+namespace Api {
+
+// Search in both of history and migrated history, if it exists.
+class MessagesSearchMerged final {
+public:
+	using Request = MessagesSearch::Request;
+	using CachedRequests = base::flat_set<Request>;
+
+	MessagesSearchMerged(not_null<History*> history);
+
+	void clear();
+	void search(const Request &search);
+	void searchMore();
+	void disableMigrated();
+
+	[[nodiscard]] const FoundMessages &messages() const;
+	[[nodiscard]] const Request &request() const;
+
+	[[nodiscard]] rpl::producer<> newFounds() const;
+	[[nodiscard]] rpl::producer<> nextFounds() const;
+
+private:
+	void addFound(const FoundMessages &data);
+
+	MessagesSearch _apiSearch;
+	Request _request;
+
+	std::optional<MessagesSearch> _migratedSearch;
+	FoundMessages _migratedFirstFound;
+
+	FoundMessages _concatedFound;
+
+	bool _waitingForTotal = false;
+	bool _isFull = false;
+
+	rpl::event_stream<> _newFounds;
+	rpl::event_stream<> _nextFounds;
+
+	rpl::lifetime _lifetime;
+
+};
+
+} // namespace Api