| // 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_NEVER_AVAILABILITY_MODEL_H_ |
| #define COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_NEVER_AVAILABILITY_MODEL_H_ |
| |
| #include <stdint.h> |
| |
| #include "base/macros.h" |
| #include "components/feature_engagement/internal/availability_model.h" |
| |
| namespace feature_engagement { |
| |
| // An AvailabilityModel that never has any data, and is ready after having been |
| // initialized. |
| class NeverAvailabilityModel : public AvailabilityModel { |
| public: |
| NeverAvailabilityModel(); |
| ~NeverAvailabilityModel() override; |
| |
| // AvailabilityModel implementation. |
| void Initialize(AvailabilityModel::OnInitializedCallback callback, |
| uint32_t current_day) override; |
| bool IsReady() const override; |
| base::Optional<uint32_t> GetAvailability( |
| const base::Feature& feature) const override; |
| |
| private: |
| // Sets |ready_| to true and posts the result to |callback|. This method |
| // exists to ensure that |ready_| is not updated directly in the |
| // Initialize(...) method. |
| void ForwardedOnInitializedCallback(OnInitializedCallback callback); |
| |
| // Whether the model has been successfully initialized. |
| bool ready_; |
| |
| DISALLOW_COPY_AND_ASSIGN(NeverAvailabilityModel); |
| }; |
| |
| } // namespace feature_engagement |
| |
| #endif // COMPONENTS_FEATURE_ENGAGEMENT_INTERNAL_NEVER_AVAILABILITY_MODEL_H_ |