Add device status reports to policy requests.

chrome/browser/policy/device_status_collector.h

+// Copyright (c) 2011 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_POLICY_DEVICE_STATUS_COLLECTOR_H_
+#define CHROME_BROWSER_POLICY_DEVICE_STATUS_COLLECTOR_H_
+#pragma once
+
+#include "base/time.h"
+#include "base/timer.h"
+#include "chrome/browser/idle.h"
+
+using base::Time;
+
+namespace enterprise_management {
+class DeviceStatusReportRequest;
+}
+
+class PrefService;
+
+namespace policy {
+
+// Collects and reports the status of an enterprised-managed ChromeOS device.

[Mattias Nissler (ping if slow), 2011/11/30 12:44:29]

doesn't actually do the reporting.

[Patrick Dubroy, 2011/12/06 14:30:36]

Done.

+class DeviceStatusCollector {
+ public:
+  explicit DeviceStatusCollector(PrefService* local_state);
+
+  void GetStatus(enterprise_management::DeviceStatusReportRequest* request);
+
+  static void RegisterPrefs(PrefService* local_state);
+
+  // Returns the max number active periods timestamps to be stored in the
+  // local state. Virtual for testing purposes.
+  virtual unsigned int max_stored_active_periods() const;

[Mattias Nissler (ping if slow), 2011/11/30 12:44:29]

would a local variable and a setter that tests can use also do? That'd be less
intrusive. Memory-wise, it's a vtable entry vs. an additional member, so no
difference since we have only one instance.

[Patrick Dubroy, 2011/12/06 14:30:36]

Good idea -- done.

+
+  // How often, in seconds, to poll to see if the user is idle.
+  static const unsigned int kPollIntervalSeconds = 30;
+
+ protected:
+  // Check whether the user has been idle for a certain period of time.
+  virtual void CheckIdleState();
+
+  // Used instead of Time::Now(), to make testing possible.
+  virtual Time GetCurrentTime();
+
+  // Callback which receives the results of the idle state check.
+  void IdleStateCallback(IdleState state);
+
+ private:
+  void AddActivePeriod(base::Time start, base::Time end);
+
+  // Since ListValue does not support int64 members, timestamps for active
+  // periods are stored as integer offsets from a reference time, which is
+  // a time_t value representing seconds since Jan 1, 1970 UTC.
+  // These methods convert to and from the offset representation.
+  bool ToInternalTime(const base::Time& time, int& out_val);
+  Time FromInternalTime(int offset);
+
+  // How often to poll to see if the user is idle.
+  int poll_interval_seconds_;
+
+  PrefService* local_state_;
+
+  // The last time an idle state check was performed.
+  Time last_idle_check_;
+
+  // The idle state the last time it was checked.
+  IdleState last_idle_state_;
+
+  base::RepeatingTimer<DeviceStatusCollector> timer_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeviceStatusCollector);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_POLICY_DEVICE_STATUS_COLLECTOR_H_