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Telegram/SourceFiles/storage/storage_cloud_blob.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/dedicated_file_loader.h"
+
+namespace tr {
+template <typename ...>
+struct phrase;
+} // namespace tr
+
+namespace Main {
+class Session;
+} // namespace Main
+
+namespace Storage::CloudBlob {
+
+constexpr auto kCloudLocationUsername = "tdhbcfiles"_cs;
+
+struct Blob {
+	int id = 0;
+	int postId = 0;
+	int64 size = 0;
+	QString name;
+};
+
+struct Available {
+	int64 size = 0;
+
+	inline bool operator<(const Available &other) const {
+		return size < other.size;
+	}
+	inline bool operator==(const Available &other) const {
+		return size == other.size;
+	}
+};
+struct Ready {
+	inline bool operator<(const Ready &other) const {
+		return false;
+	}
+	inline bool operator==(const Ready &other) const {
+		return true;
+	}
+};
+struct Active {
+	inline bool operator<(const Active &other) const {
+		return false;
+	}
+	inline bool operator==(const Active &other) const {
+		return true;
+	}
+};
+struct Failed {
+	inline bool operator<(const Failed &other) const {
+		return false;
+	}
+	inline bool operator==(const Failed &other) const {
+		return true;
+	}
+};
+
+using Loading = MTP::DedicatedLoader::Progress;
+using BlobState = std::variant<
+	Available,
+	Ready,
+	Active,
+	Failed,
+	Loading>;
+
+bool UnpackBlob(
+	const QString &path,
+	const QString &folder,
+	Fn<bool(const QString &)> checkNameCallback);
+
+QString StateDescription(const BlobState &state, tr::phrase<> activeText);
+
+class BlobLoader : public QObject {
+public:
+	BlobLoader(
+		QObject *parent,
+		not_null<Main::Session*> session,
+		int id,
+		MTP::DedicatedLoader::Location location,
+		const QString &folder,
+		int64 size);
+
+	int id() const;
+
+	rpl::producer<BlobState> state() const;
+	virtual void destroy() = 0;
+	virtual void unpack(const QString &path) = 0;
+
+protected:
+	virtual void fail();
+
+	const QString _folder;
+
+private:
+	void setImplementation(std::unique_ptr<MTP::DedicatedLoader> loader);
+
+	int _id = 0;
+	rpl::variable<BlobState> _state;
+
+	MTP::WeakInstance _mtproto;
+
+	std::unique_ptr<MTP::DedicatedLoader> _implementation;
+
+};
+
+} // namespace Storage::CloudBlob