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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_ASH_HOLDING_SPACE_HOLDING_SPACE_PERSISTENCE_DELEGATE_H_
#define CHROME_BROWSER_UI_ASH_HOLDING_SPACE_HOLDING_SPACE_PERSISTENCE_DELEGATE_H_
#include <memory>
#include <vector>
#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "chrome/browser/ui/ash/holding_space/holding_space_keyed_service_delegate.h"
#include "chrome/browser/ui/ash/holding_space/holding_space_util.h"
namespace user_prefs {
class PrefRegistrySyncable;
} // namespace user_prefs
namespace ash {
class HoldingSpaceItem;
class ThumbnailLoader;
using HoldingSpaceItemPtr = std::unique_ptr<HoldingSpaceItem>;
// A delegate of `HoldingSpaceKeyedService` tasked with persistence of holding
// space items. This includes the initial restoration of the model as well as
// incremental updates as items are added/removed at runtime.
class HoldingSpacePersistenceDelegate
: public HoldingSpaceKeyedServiceDelegate {
public:
// TODO(crbug.com/40150129): Move to `ash::holding_space_prefs`.
// Preference path at which holding space items are persisted.
// NOTE: Any changes to persistence must be backwards compatible.
static constexpr char kPersistencePath[] = "ash.holding_space.items";
// Callback to invoke when holding space persistence has been restored to
// add the restored items to the holding space model.
using PersistenceRestoredCallback =
base::OnceCallback<void(std::vector<HoldingSpaceItemPtr>)>;
HoldingSpacePersistenceDelegate(
HoldingSpaceKeyedService* service,
HoldingSpaceModel* model,
ThumbnailLoader* thumbnail_loader,
PersistenceRestoredCallback persistence_restored_callback);
HoldingSpacePersistenceDelegate(const HoldingSpacePersistenceDelegate&) =
delete;
HoldingSpacePersistenceDelegate& operator=(
const HoldingSpacePersistenceDelegate&) = delete;
~HoldingSpacePersistenceDelegate() override;
// Registers profile preferences for holding space.
static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
private:
// HoldingSpaceKeyedServiceDelegate:
void Init() override;
void OnHoldingSpaceItemsAdded(
const std::vector<const HoldingSpaceItem*>& items) override;
void OnHoldingSpaceItemsRemoved(
const std::vector<const HoldingSpaceItem*>& items) override;
void OnHoldingSpaceItemUpdated(
const HoldingSpaceItem* item,
const HoldingSpaceItemUpdatedFields& updated_fields) override;
// Restores the holding space model from persistent storage.
void RestoreModelFromPersistence();
// Removes items from persistent storage that should not be restored to the
// in-memory holding space model.
void MaybeRemoveItemsFromPersistence();
// Owned by `HoldingSpaceKeyedService`.
const raw_ptr<ThumbnailLoader> thumbnail_loader_;
// Callback to invoke when holding space persistence has been restored.
PersistenceRestoredCallback persistence_restored_callback_;
base::WeakPtrFactory<HoldingSpacePersistenceDelegate> weak_factory_{this};
};
} // namespace ash
#endif // CHROME_BROWSER_UI_ASH_HOLDING_SPACE_HOLDING_SPACE_PERSISTENCE_DELEGATE_H_
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