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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>
*/
#include <datetime/alarm-queue-simple.h>
#include <cmath>
#include <set>
namespace unity {
namespace indicator {
namespace datetime {
/***
****
***/
class SimpleAlarmQueue::Impl
{
public:
Impl(const std::shared_ptr<Clock>& clock,
const std::shared_ptr<Planner>& planner,
const std::shared_ptr<WakeupTimer>& timer):
m_clock{clock},
m_planner{planner},
m_timer{timer},
m_datetime{clock->localtime()}
{
m_planner->appointments().changed().connect([this](const std::vector<Appointment>&){
g_debug("AlarmQueue %p calling requeue() due to appointments changed", this);
requeue();
});
m_clock->minute_changed.connect([=]{
const auto now = m_clock->localtime();
constexpr auto skew_threshold_usec = int64_t{90} * G_USEC_PER_SEC;
const bool clock_jumped = std::abs(now - m_datetime) > skew_threshold_usec;
m_datetime = now;
if (clock_jumped) {
g_debug("AlarmQueue %p calling requeue() due to clock skew", this);
requeue();
}
});
m_timer->timeout().connect([this](){
g_debug("AlarmQueue %p calling requeue() due to timeout", this);
requeue();
});
requeue();
}
~Impl()
{
}
core::Signal<const Appointment&, const Alarm&>& alarm_reached()
{
return m_alarm_reached;
}
private:
void requeue()
{
// kick any current alarms
for (const auto& appointment : m_planner->appointments().get())
{
Alarm alarm;
if (appointment_get_current_alarm(appointment, alarm))
{
m_triggered.insert(std::make_pair(appointment.uid, alarm.time));
m_alarm_reached(appointment, alarm);
}
}
// idle until the next alarm
Alarm next;
if (find_next_alarm(next))
{
g_debug ("setting timer to wake up for next appointment '%s' at %s",
next.text.c_str(),
next.time.format("%F %T").c_str());
m_timer->set_wakeup_time(next.time);
}
}
// find the next alarm that will kick now or in the future
bool find_next_alarm(Alarm& setme) const
{
bool found = false;
Alarm best;
const auto now = m_clock->localtime();
const auto beginning_of_minute = now.start_of_minute();
const auto& appointments = m_planner->appointments().get();
g_debug ("planner has %zu appointments in it", (size_t)appointments.size());
for(const auto& appointment : appointments)
{
for(const auto& alarm : appointment.alarms)
{
const std::pair<const std::string&,const DateTime&> trig{appointment.uid, alarm.time};
if (m_triggered.count(trig))
continue;
if (alarm.time < beginning_of_minute) // has this one already passed?
continue;
if (found && (best.time < alarm.time)) // do we already have a better match?
continue;
best = alarm;
found = true;
}
}
if (found)
setme = best;
return found;
}
bool appointment_get_current_alarm(const Appointment& appointment, Alarm& setme) const
{
const auto now = m_clock->localtime();
for (const auto& alarm : appointment.alarms)
{
const std::pair<const std::string&,const DateTime&> trig{appointment.uid, alarm.time};
if (m_triggered.count(trig)) // did we already use this one?
continue;
if (DateTime::is_same_minute(now, alarm.time))
{
setme = alarm;
return true;
}
}
return false;
}
std::set<std::pair<std::string,DateTime>> 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&, const Alarm&> m_alarm_reached;
DateTime m_datetime;
};
/***
**** Public API
***/
SimpleAlarmQueue::SimpleAlarmQueue(const std::shared_ptr<Clock>& clock,
const std::shared_ptr<Planner>& planner,
const std::shared_ptr<WakeupTimer>& timer):
impl{new Impl{clock, planner, timer}}
{
}
SimpleAlarmQueue::~SimpleAlarmQueue()
{
}
core::Signal<const Appointment&, const Alarm&>&
SimpleAlarmQueue::alarm_reached()
{
return impl->alarm_reached();
}
/***
****
***/
} // namespace datetime
} // namespace indicator
} // namespace unity
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