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// Copyright 2017 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 COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_AVAILABILITY_MODEL_IMPL_H_
#define COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_AVAILABILITY_MODEL_IMPL_H_
#include <stdint.h>
#include <map>
#include <memory>
#include <string>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "components/feature_engagement/internal/availability_model.h"
#include "components/feature_engagement/internal/persistent_availability_store.h"
namespace base {
struct Feature;
} // namespace base
namespace feature_engagement {
// An AvailabilityModel which supports loading data from an
// PersistentAvailabilityStore.
class AvailabilityModelImpl : public AvailabilityModel {
public:
using StoreLoadCallback =
base::OnceCallback<void(PersistentAvailabilityStore::OnLoadedCallback,
uint32_t current_day)>;
explicit AvailabilityModelImpl(StoreLoadCallback load_callback);
~AvailabilityModelImpl() override;
// AvailabilityModel implementation.
void Initialize(OnInitializedCallback callback,
uint32_t current_day) override;
bool IsReady() const override;
absl::optional<uint32_t> GetAvailability(
const base::Feature& feature) const override;
private:
// This is invoked when the store has completed loading.
void OnStoreLoadComplete(
OnInitializedCallback on_initialized_callback,
bool success,
std::unique_ptr<std::map<std::string, uint32_t>> feature_availabilities);
// Stores the day number since epoch (1970-01-01) in the local timezone for
// when the particular feature was made available. The key is the feature
// name.
std::map<std::string, uint32_t> feature_availabilities_;
// Whether the model has successfully initialized.
bool ready_;
// A callback for loading availability data from the store. This is reset
// as soon as it is invoked.
StoreLoadCallback store_load_callback_;
base::WeakPtrFactory<AvailabilityModelImpl> weak_ptr_factory_{this};
DISALLOW_COPY_AND_ASSIGN(AvailabilityModelImpl);
};
} // namespace feature_engagement
#endif // COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_AVAILABILITY_MODEL_IMPL_H_
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