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Telegram/SourceFiles/data/data_cloud_file.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/flags.h"
+#include "ui/image/image.h"
+#include "ui/image/image_location.h"
+
+class FileLoader;
+
+namespace Storage {
+namespace Cache {
+class Database;
+} // namespace Cache
+} // namespace Storage
+
+namespace Main {
+class Session;
+} // namespace Main
+
+namespace Data {
+
+struct FileOrigin;
+
+struct CloudFile final {
+	enum class Flag : uchar {
+		Cancelled = 0x01,
+		Failed = 0x02,
+		Loaded = 0x04,
+	};
+	friend inline constexpr bool is_flag_type(Flag) { return true; };
+
+	~CloudFile();
+
+	void clear();
+
+	ImageLocation location;
+	std::unique_ptr<FileLoader> loader;
+	int byteSize = 0;
+	int progressivePartSize = 0;
+	base::flags<Flag> flags;
+};
+
+class CloudImage final {
+public:
+	CloudImage();
+	CloudImage(
+		not_null<Main::Session*> session,
+		const ImageWithLocation &data);
+
+	// This method will replace the location and zero the _view pointer.
+	void set(
+		not_null<Main::Session*> session,
+		const ImageWithLocation &data);
+
+	void update(
+		not_null<Main::Session*> session,
+		const ImageWithLocation &data);
+
+	[[nodiscard]] bool empty() const;
+	[[nodiscard]] bool loading() const;
+	[[nodiscard]] bool failed() const;
+	[[nodiscard]] bool loadedOnce() const;
+	void load(not_null<Main::Session*> session, FileOrigin origin);
+	[[nodiscard]] const ImageLocation &location() const;
+	[[nodiscard]] int byteSize() const;
+
+	[[nodiscard]] std::shared_ptr<QImage> createView();
+	[[nodiscard]] std::shared_ptr<QImage> activeView() const;
+	[[nodiscard]] bool isCurrentView(
+		const std::shared_ptr<QImage> &view) const;
+
+private:
+	void setToActive(not_null<Main::Session*> session, QImage image);
+
+	CloudFile _file;
+	std::weak_ptr<QImage> _view;
+
+};
+
+void UpdateCloudFile(
+	CloudFile &file,
+	const ImageWithLocation &data,
+	Storage::Cache::Database &cache,
+	uint8 cacheTag,
+	Fn<void(FileOrigin)> restartLoader,
+	Fn<void(QImage, QByteArray)> usePreloaded = nullptr);
+
+void LoadCloudFile(
+	not_null<Main::Session*> session,
+	CloudFile &file,
+	FileOrigin origin,
+	LoadFromCloudSetting fromCloud,
+	bool autoLoading,
+	uint8 cacheTag,
+	Fn<bool()> finalCheck,
+	Fn<void(QImage, QByteArray)> done,
+	Fn<void(bool)> fail = nullptr,
+	Fn<void()> progress = nullptr,
+	int downloadFrontPartSize = 0);
+
+void LoadCloudFile(
+	not_null<Main::Session*> session,
+	CloudFile &file,
+	FileOrigin origin,
+	LoadFromCloudSetting fromCloud,
+	bool autoLoading,
+	uint8 cacheTag,
+	Fn<bool()> finalCheck,
+	Fn<void(QByteArray)> done,
+	Fn<void(bool)> fail = nullptr,
+	Fn<void()> progress = nullptr);
+
+} // namespace Data