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// Copyright 2018 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_COMPONENT_UPDATER_METADATA_TABLE_CHROMEOS_H_
#define CHROME_BROWSER_COMPONENT_UPDATER_METADATA_TABLE_CHROMEOS_H_
#include <memory>
#include <string>
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/values.h"
class PrefRegistrySimple;
class PrefService;
namespace component_updater {
// MetadataTable is a persistent data structure that tracks component usage
// across profiles.
// The instance of this Class lives on UI thread.
class MetadataTable {
public:
explicit MetadataTable(PrefService* pref_service);
~MetadataTable();
// Create and return a MetadataTable instance for testing purpose.
static std::unique_ptr<component_updater::MetadataTable> CreateForTest();
// Register a Dictionary in PrefService.
static void RegisterPrefs(PrefRegistrySimple* registry);
// Adds or updates a component usage item for current active user.
bool AddComponentForCurrentUser(const std::string& component_name);
// Deletes a component usage item for current active user.
bool DeleteComponentForCurrentUser(const std::string& component_name);
// Checks if component usage item exists for any user.
bool HasComponentForAnyUser(const std::string& component_name) const;
private:
FRIEND_TEST_ALL_PREFIXES(CrOSComponentInstallerMetadataTest, Add);
FRIEND_TEST_ALL_PREFIXES(CrOSComponentInstallerMetadataTest, Delete);
// Constructor for testing purpose. Access via CreateForTest().
MetadataTable();
// Loads |installed_items_| from PrefService.
void Load();
// Stores |installed_items_| to PrefService.
void Store();
// Add an item to |installed_items_|.
void AddItem(const std::string& hashed_user_id,
const std::string& component_name);
// Delete an item from |installed_items_].
bool DeleteItem(const std::string& hashed_user_id,
const std::string& component_name);
// Checks if component usage item exists for a user.
bool HasComponentForUser(const std::string& hashed_user_id,
const std::string& component_name) const;
// Returns the index of an installed item with the given |hashed_user_id| and
// |component_name|. Returns `installed_items_.GetList().size()` if no such
// item exists.
size_t GetInstalledItemIndex(const std::string& hashed_user_id,
const std::string& component_name) const;
// Information about installed items.
base::Value installed_items_;
// Local state PrefService.
PrefService* const pref_service_;
DISALLOW_COPY_AND_ASSIGN(MetadataTable);
};
} // namespace component_updater
#endif // CHROME_BROWSER_COMPONENT_UPDATER_METADATA_TABLE_CHROMEOS_H_