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Telegram/SourceFiles/lang/lang_cloud_manager.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 "mtproto/sender.h"
+#include "base/weak_ptr.h"
+
+namespace MTP {
+class Instance;
+} // namespace MTP
+
+namespace Lang {
+
+class Instance;
+enum class Pack;
+struct Language;
+
+Language ParseLanguage(const MTPLangPackLanguage &data);
+
+class CloudManager : public base::has_weak_ptr {
+public:
+	explicit CloudManager(Instance &langpack);
+
+	using Languages = std::vector<Language>;
+
+	void requestLanguageList();
+	const Languages &languageList() const {
+		return _languages;
+	}
+	[[nodiscard]] rpl::producer<> languageListChanged() const;
+	[[nodiscard]] rpl::producer<> firstLanguageSuggestion() const;
+	void requestLangPackDifference(const QString &langId);
+	void applyLangPackDifference(const MTPLangPackDifference &difference);
+	void setCurrentVersions(int version, int baseVersion);
+
+	void resetToDefault();
+	void switchWithWarning(const QString &id);
+	void switchToLanguage(const QString &id);
+	void switchToLanguage(const Language &data);
+	void switchToTestLanguage();
+	void setSuggestedLanguage(const QString &langCode);
+	QString suggestedLanguage() const {
+		return _suggestedLanguage;
+	}
+
+	void getValueForLang(
+		const QString &key,
+		const QString &langId,
+		Fn<void(const QString &)> callback);
+
+private:
+	mtpRequestId &packRequestId(Pack pack);
+	mtpRequestId packRequestId(Pack pack) const;
+	Pack packTypeFromId(const QString &id) const;
+	void requestLangPackDifference(Pack pack);
+	bool canApplyWithoutRestart(const QString &id) const;
+	void performSwitchToCustom();
+	void performSwitch(const Language &data);
+	void performSwitchAndAddToRecent(const Language &data);
+	void performSwitchAndRestart(const Language &data);
+	void restartAfterSwitch();
+	void offerSwitchLangPack();
+	bool showOfferSwitchBox();
+	Language findOfferedLanguage() const;
+
+	void requestLanguageAndSwitch(const QString &id, bool warning);
+	void applyLangPackData(Pack pack, const MTPDlangPackDifference &data);
+	void switchLangPackId(const Language &data);
+	void changeIdAndReInitConnection(const Language &data);
+
+	void sendSwitchingToLanguageRequest();
+	void resendPendingValueRequests();
+	void resendRequests();
+
+	std::optional<MTP::Sender> _api;
+	Instance &_langpack;
+	Languages _languages;
+	mtpRequestId _langPackRequestId = 0;
+	mtpRequestId _langPackBaseRequestId = 0;
+	mtpRequestId _languagesRequestId = 0;
+
+	QString _offerSwitchToId;
+	bool _restartAfterSwitch = false;
+
+	QString _suggestedLanguage;
+	bool _languageWasSuggested = false;
+
+	mtpRequestId _switchingToLanguageRequest = 0;
+	QString _switchingToLanguageId;
+	bool _switchingToLanguageWarning = false;
+
+	mtpRequestId _getKeysForSwitchRequestId = 0;
+
+	struct ValueRequest {
+		mtpRequestId requestId = 0;
+		Fn<void(const QString &)> callback;
+	};
+	base::flat_map<QString, ValueRequest> _getValueForLangRequests;
+
+	rpl::event_stream<> _languageListChanged;
+	rpl::event_stream<> _firstLanguageSuggestion;
+
+	rpl::lifetime _lifetime;
+
+};
+
+CloudManager &CurrentCloudManager();
+
+} // namespace Lang