PM: Add a time provider.
This implements a time provider interface, as well as a real and a fake
implementation.
BUG=chromium:341205
TEST=Unit tests.
Change-Id: Ibc6a865ab868e0f8c760c003dc970b7987896a36
Reviewed-on: https://chromium-review.googlesource.com/190247
Tested-by: Gilad Arnold <garnold@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Gilad Arnold <garnold@chromium.org>
diff --git a/policy_manager/real_time_provider.cc b/policy_manager/real_time_provider.cc
new file mode 100644
index 0000000..0c20e2e
--- /dev/null
+++ b/policy_manager/real_time_provider.cc
@@ -0,0 +1,69 @@
+// Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "update_engine/policy_manager/real_time_provider.h"
+
+#include <base/time.h>
+
+#include "update_engine/clock_interface.h"
+
+using base::Time;
+using base::TimeDelta;
+using chromeos_update_engine::ClockInterface;
+using std::string;
+
+namespace chromeos_policy_manager {
+
+// A variable returning the current date.
+class CurrDateVariable : public Variable<Time> {
+ public:
+ // TODO(garnold) Turn this into an async variable with the needed callback
+ // logic for when it value changes.
+ CurrDateVariable(const string& name, ClockInterface* clock)
+ : Variable<Time>(name, TimeDelta::FromHours(1)), clock_(clock) {}
+
+ protected:
+ virtual const Time* GetValue(base::TimeDelta /* timeout */,
+ string* /* errmsg */) {
+ Time::Exploded now_exp;
+ clock_->GetWallclockTime().LocalExplode(&now_exp);
+ now_exp.hour = now_exp.minute = now_exp.second = now_exp.millisecond = 0;
+ return new Time(Time::FromLocalExploded(now_exp));
+ }
+
+ private:
+ ClockInterface* clock_;
+
+ DISALLOW_COPY_AND_ASSIGN(CurrDateVariable);
+};
+
+// A variable returning the current hour in local time.
+class CurrHourVariable : public Variable<int> {
+ public:
+ // TODO(garnold) Turn this into an async variable with the needed callback
+ // logic for when it value changes.
+ CurrHourVariable(const string& name, ClockInterface* clock)
+ : Variable<int>(name, TimeDelta::FromMinutes(5)), clock_(clock) {}
+
+ protected:
+ virtual const int* GetValue(base::TimeDelta /* timeout */,
+ string* /* errmsg */) {
+ Time::Exploded exploded;
+ clock_->GetWallclockTime().LocalExplode(&exploded);
+ return new int(exploded.hour);
+ }
+
+ private:
+ ClockInterface* clock_;
+
+ DISALLOW_COPY_AND_ASSIGN(CurrHourVariable);
+};
+
+bool RealTimeProvider::DoInit() {
+ set_var_curr_date(new CurrDateVariable("curr_date", clock_));
+ set_var_curr_hour(new CurrHourVariable("curr_hour", clock_));
+ return true;
+}
+
+} // namespace chromeos_policy_manager