| // Copyright 2016 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_NTP_SNIPPETS_REMOTE_PERSISTENT_SCHEDULER_H_ |
| #define COMPONENTS_NTP_SNIPPETS_REMOTE_PERSISTENT_SCHEDULER_H_ |
| |
| #include "base/macros.h" |
| #include "base/time/time.h" |
| |
| namespace ntp_snippets { |
| |
| // Interface to schedule persistent periodic fetches for remote suggestions, OS- |
| // dependent. These persistent fetches must get triggered according to their |
| // schedule independent of whether Chrome is running at that moment. |
| // |
| // Once per period, the concrete implementation should call |
| // RemoteSuggestionsScheduler::OnPersistentSchedulerWakeUp() where the scheduler |
| // object is obtained from ContentSuggestionsService. |
| class PersistentScheduler { |
| public: |
| // Schedule periodic fetching of remote suggestions, with different periods |
| // depending on network state. Any of the periods can be zero to indicate that |
| // the corresponding task should not be scheduled. Returns whether the |
| // scheduling was successful. |
| virtual bool Schedule(base::TimeDelta period_wifi, |
| base::TimeDelta period_fallback) = 0; |
| |
| // Cancel any scheduled tasks. Equivalent to Schedule(0, 0). Returns whether |
| // the scheduling was successful. |
| virtual bool Unschedule() = 0; |
| |
| // TODO(jkrcal): Get this information exposed in the platform-independent |
| // net::NetworkChangeNotifier and remove this function. |
| virtual bool IsOnUnmeteredConnection() = 0; |
| |
| protected: |
| PersistentScheduler() = default; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(PersistentScheduler); |
| }; |
| |
| } // namespace ntp_snippets |
| |
| #endif // COMPONENTS_NTP_SNIPPETS_REMOTE_PERSISTENT_SCHEDULER_H_ |