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diff --git a/include/datetime/alarm-queue-simple.h b/include/datetime/alarm-queue-simple.h
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+/*
+ * Copyright 2014 Canonical Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 3, as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranties of
+ * MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ *   Charles Kerr <charles.kerr@canonical.com>
+ */
+
+#ifndef INDICATOR_DATETIME_ALARM_QUEUE_SIMPLE_H
+#define INDICATOR_DATETIME_ALARM_QUEUE_SIMPLE_H
+
+#include <datetime/alarm-queue.h>
+#include <datetime/clock.h>
+#include <datetime/planner.h>
+#include <datetime/wakeup-timer.h>
+
+namespace unity {
+namespace indicator {
+namespace datetime {
+
+/**
+ * \brief A #AlarmQueue implementation 
+ */
+class SimpleAlarmQueue: public AlarmQueue
+{
+public:
+    SimpleAlarmQueue(const std::shared_ptr<Clock>& clock,
+                     const std::shared_ptr<Planner>& upcoming_planner,
+                     const std::shared_ptr<WakeupTimer>& timer);
+    ~SimpleAlarmQueue();
+    core::Signal<const Appointment&>& alarm_reached();
+
+private:
+    void requeue();
+    bool find_next_alarm(Appointment& setme) const;
+    std::vector<Appointment> find_current_alarms() const;
+    void check_alarms();
+
+    std::set<std::string> m_triggered;
+    const std::shared_ptr<Clock> m_clock;
+    const std::shared_ptr<Planner> m_planner;
+    const std::shared_ptr<WakeupTimer> m_timer;
+    core::Signal<const Appointment&> m_alarm_reached;
+    DateTime m_time;
+};
+
+
+} // namespace datetime
+} // namespace indicator
+} // namespace unity
+
+#endif // INDICATOR_DATETIME_ALARM_QUEUE_H