/// <summary>
/// Erzeugt die Beschreibung eines Eintrags aus der Programmzeitschrift und vermerkt diese
/// in der Gesamtliste.
/// </summary>
/// <remarks>Wird auf einem separaten <see cref="Thread"/> ausgeführt und
/// muss alle Zugriff auf die statischen Daten geeignet synchronisieren.</remarks>
/// <param name="source">Die Quelle, zu der die Information gehört.</param>
/// <param name="identifier">Die eindeutige Kennung der Sendung.</param>
/// <param name="startTime">Anfangszeitpunkt in UTC / GMT.</param>
/// <param name="duration">Dauer der zugehörigen Sendung.</param>
/// <param name="descriptors">Ergänzende Beschreibungen zur Sendung.</param>
/// <returns>Die neu erzeugte Beschreibungsinstanz.</returns>
private void AddGuideItem(SourceIdentifier source, uint identifier, DateTime startTime, TimeSpan duration, legacy.Descriptor[] descriptors)
{
// First create it
ProgramGuideItem info = CreateGuideItem(source, identifier, startTime, duration, descriptors);
if (null == info)
{
return;
}
// Must synchronize
lock (m_EPGItems)
{
// Attach to the source list
Dictionary <DateTime, ProgramGuideItem> list;
if (!m_EPGItems.TryGetValue(source, out list))
{
// Create new
list = new Dictionary <DateTime, ProgramGuideItem>();
// Add it
m_EPGItems[source] = list;
}
// Old count
int before = list.Count;
// Remember
list[startTime] = info;
// New count
m_EPGItemCount += (list.Count - before);
}
}
/// <summary>
/// Meldet alle gesammelten Informationen der Programmzeitschrift.
/// </summary>
private ProgramGuideItem[] CreateGuideItems()
{
// Result
List <ProgramGuideItem> schedules = new List <ProgramGuideItem>();
// Lock out - actually this should not be necessary
lock (m_EPGItems)
{
// Loop over all we found
foreach (Dictionary <DateTime, ProgramGuideItem> list in m_EPGItems.Values)
{
// Get all dates for one source
List <DateTime> dates = new List <DateTime>(list.Keys);
// Sort ascending
dates.Sort();
// Next allowed date
DateTime allowed = DateTime.MinValue;
// Process all dates
foreach (DateTime start in dates)
{
// Attach to the item
ProgramGuideItem info = list[start];
// Start is hidden
if (start < allowed)
{
// End is hidden - discard all
if (info.End <= allowed)
{
continue;
}
// Adjust duration
info.Duration = (int)(info.End - allowed).TotalSeconds;
// Adjust start
info.Start = allowed;
}
// Remember it
schedules.Add(info);
// Set the end as the new allowed point
allowed = info.End;
}
}
// Wipe out
m_EPGItems.Clear();
}
// Report
return(schedules.ToArray());
}
