| // 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 CHROME_BROWSER_CHROMEOS_POLICY_MINIMUM_VERSION_POLICY_HANDLER_H_ |
| #define CHROME_BROWSER_CHROMEOS_POLICY_MINIMUM_VERSION_POLICY_HANDLER_H_ |
| |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/observer_list.h" |
| #include "chrome/browser/chromeos/settings/cros_settings.h" |
| |
| namespace policy { |
| |
| // This class observes the device setting |kMinimumRequiredChromeVersion|, and |
| // checks if respective requirement is met. |
| class MinimumVersionPolicyHandler { |
| public: |
| class Observer { |
| public: |
| virtual void OnMinimumVersionStateChanged() = 0; |
| virtual ~Observer() = default; |
| }; |
| |
| explicit MinimumVersionPolicyHandler(chromeos::CrosSettings* cros_settings); |
| ~MinimumVersionPolicyHandler(); |
| |
| void AddObserver(Observer* observer); |
| void RemoveObserver(Observer* observer); |
| bool RequirementsAreSatisfied() const { return requirements_met_; } |
| |
| private: |
| void OnPolicyChanged(); |
| |
| void NotifyMinimumVersionStateChanged(); |
| |
| bool requirements_met_ = true; |
| |
| // Non-owning reference to CrosSettings. This class have shorter lifetime than |
| // CrosSettings. |
| chromeos::CrosSettings* cros_settings_; |
| |
| std::unique_ptr<chromeos::CrosSettings::ObserverSubscription> |
| policy_subscription_; |
| |
| // List of registered observers. |
| base::ObserverList<Observer> observers_; |
| |
| base::WeakPtrFactory<MinimumVersionPolicyHandler> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MinimumVersionPolicyHandler); |
| }; |
| |
| } // namespace policy |
| |
| #endif // CHROME_BROWSER_CHROMEOS_POLICY_MINIMUM_VERSION_POLICY_HANDLER_H_ |