private void ScheduleLights()
{
Debug.Print("Scheduling lights: " + m_services.Now.ToString(m_config.DATETIME_FORMAT));
bool isDstToday = m_config.IsDstInEffect(m_services.Now);
if (isDstToday && !m_isDst)
{
// Spring a head
m_services.SetLocalTime(m_services.Now + new TimeSpan(1, 0, 0));
Debug.Print("DST starting. Time now: " + m_services.Now.ToString(m_config.DATETIME_FORMAT));
m_isDst = isDstToday;
}
else if (m_isDst && !isDstToday)
{
// Fall back
m_services.SetLocalTime(m_services.Now - new TimeSpan(1, 0, 0));
Debug.Print("DST over. Time now: " + m_services.Now.ToString(m_config.DATETIME_FORMAT));
m_isDst = isDstToday;
}
lock (m_lightTimesLock)
{
m_lightTimes = new LightTimes(m_services.Now, m_config);
}
// Get an order list of events for the day
ArrayList les = LightEventsForDate(m_lightTimes);
// Iterate over the list looking for previous event and next event based on current time
int prevIndex = -1;
for (int i = 0; i < les.Count; i++)
{
LightEvent le = (LightEvent)les[i];
if (le.DT < m_services.Now)
prevIndex = i;
else
break;
}
// Turn the light on if the previous event was an on event
if (prevIndex > -1)
{
LightEvent prev = (LightEvent)les[prevIndex];
if (prev.Type == LightEventType.Scheduled_On || prev.Type == LightEventType.Sunset_On)
{
Debug.Print("Turning light ON due to missed event");
m_relay.TurnOn();
}
}
// Iterate over the remaining events adding each to the event queue
if (prevIndex + 1 < les.Count)
{
for (int i = prevIndex + 1; i < les.Count; i++)
{
LightEvent le = (LightEvent)les[i];
Debug.Print("Enqueing LE: " + le.ToString(m_config.DATETIME_FORMAT));
m_events.Enqueue(le);
}
}
// Schedule the event to schedule tomorrows events
LightEvent scheduleEvent = new LightEvent(m_services.Now.Date + new TimeSpan(1, 0, 0, 0), LightEventType.Tomorrow);
Debug.Print("Enqueing LE: " + scheduleEvent.ToString(m_config.DATETIME_FORMAT));
m_events.Enqueue(scheduleEvent);
}
/*
* [ ] is period where the light is on
*
* |012345678901234567890123|012345678901234567890123|012345678901234567890123|
* |------------------------|------------------------|------------------------|
* | ] [ ] [ | ] [ ] [ | ] [ ] [ |
*/
/* Example of shifting sunrise and sunset in polar regions
|123456789012123456789012|
|------------------------|
|012345678901234567890123|
| ] [ |
| ] [ ][ |
| ] [ ] [ |
| ] [ ] [ |
| ] [ ] [ |
| ] [ ] [ |
| ] [ ] [ |
| ] [ ] [ |
| ] [ ] [ |
| ] [] [|
|[] |
| |
| |
| |
|[] |
| ] [] [|
| ] [ ] [ |
| ] [ ] [ |
| ] [ ] [ |
| ] [ ] [ |
| ] [ ] [ |
| ] [ ] [ |
| ] [ ] [ |
| ] [ ][ |
| ] [ |
*/
// Return an order list of light events for the specified day.
private ArrayList LightEventsForDate(LightTimes lt)
{
ArrayList les = new ArrayList();
if (lt.LightsOffPM > lt.LightsOnAM)
{
// Scheduled lights off late night
if (lt.LightsOnAM < lt.LightsOffAM)
{
les.Add(new LightEvent(lt.LightsOnAM, LightEventType.Scheduled_On));
}
if (lt.Sunrise < lt.Sunset)
{
les.Add(new LightEvent(lt.LightsOffAM, LightEventType.Sunrise_Off));
les.Add(new LightEvent(lt.LightsOnPM, LightEventType.Sunset_On));
}
if (lt.LightsOffPM > lt.LightsOnPM)
{
les.Add(new LightEvent(lt.LightsOffPM, LightEventType.Scheduled_Off));
}
}
else
{
// Scheduled lights off early morning
if (lt.LightsOffPM < lt.LightsOffAM)
{
les.Add(new LightEvent(lt.LightsOffPM, LightEventType.Scheduled_Off));
}
if (lt.LightsOnAM < lt.LightsOffAM)
{
les.Add(new LightEvent(lt.LightsOnAM, LightEventType.Scheduled_On));
}
if (lt.Sunrise < lt.Sunset)
{
les.Add(new LightEvent(lt.LightsOffAM, LightEventType.Sunrise_Off));
les.Add(new LightEvent(lt.LightsOnPM, LightEventType.Sunset_On));
}
}
return les;
}