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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef EXTENSIONS_BROWSER_API_FILE_SYSTEM_SAVED_FILES_SERVICE_INTERFACE_H_
#define EXTENSIONS_BROWSER_API_FILE_SYSTEM_SAVED_FILES_SERVICE_INTERFACE_H_
#include <string>
#include "base/files/file_path.h"
#include "extensions/common/extension_id.h"
namespace extensions {
struct SavedFileEntry;
// Provides an LRU of saved file entries that persist across app reloads.
class SavedFilesServiceInterface {
public:
virtual ~SavedFilesServiceInterface() {}
// Registers a file entry with the saved files service, making it eligible to
// be put into the queue. File entries that are in the retained files queue at
// object construction are automatically registered.
virtual void RegisterFileEntry(const ExtensionId& extension_id,
const std::string& id,
const base::FilePath& file_path,
bool is_directory) = 0;
// If the file with |id| is not in the queue of files to be retained
// permanently, adds the file to the back of the queue, evicting the least
// recently used entry at the front of the queue if it is full. If it is
// already present, moves it to the back of the queue. The |id| must have been
// registered.
virtual void EnqueueFileEntry(const ExtensionId& extension_id,
const std::string& id) = 0;
// Returns whether the file entry with the given |id| has been registered.
virtual bool IsRegistered(const ExtensionId& extension_id,
const std::string& id) = 0;
// Gets a borrowed pointer to the file entry with the specified |id|. Returns
// nullptr if the file entry has not been registered.
virtual const SavedFileEntry* GetFileEntry(const ExtensionId& extension_id,
const std::string& id) = 0;
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_API_FILE_SYSTEM_SAVED_FILES_SERVICE_INTERFACE_H_
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