/// <summary>
/// Sets the next media node. Should be used either from a mediaComplete event, or an options reset from
/// the parent.
/// </summary>
private bool SetNextMediaNodeInOptions()
{
// What if there are no media nodes?
if (_options.mediaNodes.Count == 0)
{
Trace.WriteLine(new LogMessage("Region - SetNextMediaNode", "No media nodes to display"), LogType.Audit.ToString());
return(false);
}
// Zero out the options that are persisted
_options.text = "";
_options.documentTemplate = "";
_options.copyrightNotice = "";
_options.scrollSpeed = 30;
_options.updateInterval = 6;
_options.uri = "";
_options.direction = "none";
_options.javaScript = "";
_options.FromDt = DateTime.MinValue;
_options.ToDt = DateTime.MaxValue;
_options.Dictionary = new MediaDictionary();
// Tidy up old audio if necessary
foreach (Media audio in _options.Audio)
{
try
{
// Unbind any events and dispose
audio.DurationElapsedEvent -= audio_DurationElapsedEvent;
audio.Dispose();
}
catch
{
Trace.WriteLine(new LogMessage("Region - SetNextMediaNodeInOptions", "Unable to dispose of audio item"), LogType.Audit.ToString());
}
}
// Empty the options node
_options.Audio.Clear();
// Get a media node
bool validNode = false;
int numAttempts = 0;
// Loop through all the nodes in order
while (numAttempts < _options.mediaNodes.Count)
{
// Move the sequence on
_currentSequence++;
if (_currentSequence >= _options.mediaNodes.Count)
{
// Start from the beginning
_currentSequence = 0;
// We have expired (want to raise an expired event to the parent)
_hasExpired = true;
Trace.WriteLine(new LogMessage("Region - SetNextMediaNode", "Media Expired:" + _options.ToString() + " . Reached the end of the sequence. Starting from the beginning."), LogType.Audit.ToString());
// Region Expired
if (DurationElapsedEvent != null)
{
DurationElapsedEvent();
}
// We want to continue on to show the next media (unless the duration elapsed event triggers a region change)
if (_layoutExpired)
{
return(true);
}
}
// Get the media node for this sequence
XmlNode mediaNode = _options.mediaNodes[_currentSequence];
XmlAttributeCollection nodeAttributes = mediaNode.Attributes;
// Set the media id
if (nodeAttributes["id"].Value != null)
{
_options.mediaid = nodeAttributes["id"].Value;
}
// Set the file id
if (nodeAttributes["fileId"] != null)
{
_options.FileId = int.Parse(nodeAttributes["fileId"].Value);
}
// Check isnt blacklisted
if (_blackList.BlackListed(_options.mediaid))
{
Trace.WriteLine(new LogMessage("Region - SetNextMediaNode", string.Format("MediaID [{0}] has been blacklisted.", _options.mediaid)), LogType.Error.ToString());
// Increment the number of attempts and try again
numAttempts++;
// Carry on
continue;
}
// Assume we have a valid node at this point
validNode = true;
// Parse the options for this media node
ParseOptionsForMediaNode(mediaNode, nodeAttributes);
// Is this widget inside the from/to date?
if (!(_options.FromDt <= DateTime.Now && _options.ToDt > DateTime.Now))
{
Trace.WriteLine(new LogMessage("Region", "SetNextMediaNode: Widget outside from/to date."), LogType.Audit.ToString());
// Increment the number of attempts and try again
numAttempts++;
// Carry on
continue;
}
// Is this a file based media node?
if (_options.type == "video" || _options.type == "flash" || _options.type == "image" || _options.type == "powerpoint" || _options.type == "audio" || _options.type == "htmlpackage")
{
// Use the cache manager to determine if the file is valid
validNode = _cacheManager.IsValidPath(_options.uri);
}
// If we have a valid node, break out of the loop
if (validNode)
{
break;
}
// Increment the number of attempts and try again
numAttempts++;
}
// If we dont have a valid node out of all the nodes in the region, then return false.
if (!validNode)
{
return(false);
}
Trace.WriteLine(new LogMessage("Region - SetNextMediaNode", "New media detected " + _options.type), LogType.Audit.ToString());
return(true);
}
