/// <summary>
/// Finds the TV channel.
/// </summary>
/// <param name="station">The station.</param>
/// <param name="map">The map.</param>
/// <returns>TVChannel found or null</returns>
protected Channel FindTVChannel(SchedulesDirect.SoapEntities.TVStation station, SchedulesDirect.SoapEntities.TVStationMap map, bool LineupIsLocalBroadcast)
{
string strTvChannel;
int idTvChannel;
/*
Log.WriteFile("Attempting Channel Find/Match for: Callsign: {0}, Map Channel: {1}, Map Major {2}, Map Minor: {3}, Map StationID: {4} ",
station.CallSign, map.Channel, map.ChannelMajor, map.ChannelMinor, map.StationId);
*/
string xmlTvId = BuildXmlTvId(LineupIsLocalBroadcast, station, map);
#region Check if the channel is already in EPG mapping database
//Log.WriteFile("GetEPGMapping: {0} for {1}", station.Name, station.ID + XMLTVID);
if (GetEPGMapping(xmlTvId, out idTvChannel, out strTvChannel))
{
Log.WriteFile("Channel {0} was found as {1} in EPG mapping database", station.Name, strTvChannel);
FixDigitalTerrestrialChannelMap(idTvChannel, station, ref map);
return Channel.Retrieve(idTvChannel);
}
#endregion
#region Try locating the channel by callsign
//Log.WriteFile("GetChannelByName: {0}", station.CallSign);
if (GetChannelByName(station.CallSign, out idTvChannel) == true)
{
Channel mpChannel = Channel.Retrieve(idTvChannel);
Log.WriteFile("Matched channel {0} to {1} using CallSign", station.CallSign, mpChannel.DisplayName);
FixDigitalTerrestrialChannelMap(idTvChannel, station, ref map);
return mpChannel;
}
#endregion
#region Iterate through each channel looking for a match
foreach (Channel mpChannel in _mpChannelCache)
{
// Get the TuningDetail for the Channel
System.Collections.IList chDetailList = (System.Collections.IList)mpChannel.ReferringTuningDetail();
if (chDetailList.Count <= 0)
continue;
TuningDetail chDetail = (TuningDetail)chDetailList[0];
// Only look at non-mapped channels
if (String.IsNullOrEmpty(mpChannel.ExternalId))
{
// Check for an ATSC major/minor channel number match
ATSCChannel atscChannel = new ATSCChannel();
if (LineupIsLocalBroadcast && GetATSCChannel(mpChannel, ref atscChannel))
{
if (map.ChannelMajor == atscChannel.MajorChannel && map.ChannelMinor == atscChannel.MinorChannel)
{
Log.WriteFile("Matched channel {0} to {1} by ATSC channel ({2}-{3})",
station.CallSign, mpChannel.DisplayName, atscChannel.MajorChannel, atscChannel.MinorChannel);
return mpChannel;
}
}
// If the Lineup is a LocalBroadcast we want to give preference to
// searching by Broadcast Number
// else give preference to the Major Channel Number
else if (LineupIsLocalBroadcast && !station.IsDigitalTerrestrial)
{
// Not an ATSC channel so check for an over-the-air
//(by checking it has a frequency) broadcast channel number match
if (chDetail.ChannelNumber == station.BroadcastChannelNumber)
{
if (chDetail.Frequency != 0 || _allowChannelNumberMapping)
{
Log.WriteFile("Matched channel {0} to {1} by OTA broadcast channel ({2})",
station.CallSign, chDetail.Name, chDetail.ChannelNumber);
return mpChannel;
}
}
}
else if (!LineupIsLocalBroadcast)
{
// Check for an over-the-air (by checking it has a frequency)
// major channel number match
if (chDetail.ChannelNumber == map.ChannelMajor)
{
if (chDetail.Frequency != 0 || _allowChannelNumberMapping)
{
Log.WriteFile("Matched channel {0} to {1} by lineup channel ({2})",
station.CallSign, chDetail.Name, chDetail.ChannelNumber);
return mpChannel;
}
}
}
}
}
#endregion
#region Check the UnMapped Channels if the lineup has changed
foreach (Channel mpChannel in _mpUnMappedChannelCache)
{
string[] xIds = mpChannel.ExternalId.Split(new char[] { '.' });
string[] cIds = xmlTvId.Split(new char[] { '.' });
if (xIds[1].ToLower() == cIds[1].ToLower())
{
_mpUnMappedChannelCache.Remove(mpChannel);
return mpChannel;
}
}
#endregion
#region Iterate through each channel again looking @ MajorChannel Number even if it is a local broadcast
foreach (Channel mpChannel in _mpChannelCache)
{
if (!String.IsNullOrEmpty(mpChannel.ExternalId))
continue;
System.Collections.IList chDetailList = (System.Collections.IList)mpChannel.ReferringTuningDetail();
if (chDetailList.Count <= 0)
continue;
TuningDetail chDetail = (TuningDetail)chDetailList[0];
if (LineupIsLocalBroadcast && !station.IsDigitalTerrestrial && chDetail.Frequency != 0)
{
// Check for an over-the-air (by checking it has a frequency) major channel number match
if (chDetail.ChannelNumber == map.ChannelMajor)
{
Log.WriteFile("Matched channel {0} to {1} by lineup channel ({2})",
station.CallSign, chDetail.Name, chDetail.ChannelNumber);
return mpChannel;
}
}
else if (!LineupIsLocalBroadcast)
{
// Not an ATSC channel so check for an over-the-air (by checking it has a frequency) broadcast channel number match
if (chDetail.ChannelNumber == station.BroadcastChannelNumber)
{
Log.WriteFile("Matched channel {0} to {1} by OTA broadcast channel ({2})",
station.CallSign, chDetail.Name, chDetail.ChannelNumber);
return mpChannel;
}
}
}
#endregion
return null;
}
/// <summary>
/// Fills in the ATSCChannel detail from the provided TuningDetail.
/// </summary>
/// <param name="idTvChannel">The Channel Database ID</param>
/// <param name="station">The station</param>
/// <param name="map">The map</param>
/// <returns>true if a fix was completed on the map.ChannelMajor and map.ChannelMinor else false</returns>
protected bool FixDigitalTerrestrialChannelMap(int idTvChannel, SchedulesDirect.SoapEntities.TVStation station, ref SchedulesDirect.SoapEntities.TVStationMap map)
{
if (station.IsDigitalTerrestrial && map.ChannelMinor <= 0)
{
ATSCChannel atscEPGChannel = new ATSCChannel();
Channel mpChannel = Channel.Retrieve(idTvChannel);
if (GetATSCChannel(mpChannel, ref atscEPGChannel))
{
map.ChannelMajor = atscEPGChannel.MajorChannel;
map.ChannelMinor = atscEPGChannel.MinorChannel;
return true;
}
}
return false;
}
/// <summary>
/// Creates a XmlTvId string using the SchedulesDirect ID + (BroadcastChannel or ChannelString) and the XMLTVID constant
/// </summary>
/// <param name="IsLocalBroadcast">True if the TVStation is a Local Broadcast</param>
/// <param name="tvStation">The TVStation</param>
/// <param name="tvStationMap">The TVStationMap</param>
/// <returns></returns>
protected string BuildXmlTvId(bool IsLocalBroadcast, SchedulesDirect.SoapEntities.TVStation tvStation, SchedulesDirect.SoapEntities.TVStationMap tvStationMap)
{
string xmlId = tvStation.ID;
if (IsLocalBroadcast && tvStation.BroadcastChannelNumber > 0 && !tvStation.IsDigitalTerrestrial)
xmlId += "." + tvStation.BroadcastChannelNumber.ToString() + XMLTVID;
else
xmlId += "." + tvStationMap.ChannelString + XMLTVID;
return xmlId;
}
/// <summary>
/// Builds the name of the channel based on the template.
/// </summary>
/// <param name="tvStation">The tv station.</param>
/// <param name="tvStationMap">The tv station map.</param>
/// <returns></returns>
protected string BuildChannelName(SchedulesDirect.SoapEntities.TVStation tvStation, SchedulesDirect.SoapEntities.TVStationMap tvStationMap)
{
string channelName = string.Empty;
if (tvStation != null && tvStationMap != null)
{
channelName = this._channelNameTemplate.ToLower(System.Globalization.CultureInfo.CurrentCulture);
channelName = channelName.Replace("{callsign}", tvStation.CallSign);
channelName = channelName.Replace("{name}", tvStation.Name);
channelName = channelName.Replace("{affiliate}", tvStation.Affiliate);
channelName = channelName.Replace("{number}", tvStationMap.Channel);
// debug
//channelName = channelName + " BCNbr: " + tvStation.BroadcastChannelNumber.ToString();
//channelName = channelName + " CMajr: " + tvStationMap.ChannelMajor.ToString();
}
return channelName;
}
/// <summary>
/// Initializes a new instance of the <see cref="T:EpgListingsImporter"/> class.
/// </summary>
/// <param name="results">The results.</param>
public EpgListingsImporter(SchedulesDirect.SoapEntities.DownloadResults results)
{
this._results = results;
}
/// <summary>
/// Writes the Schedules Direct XML data structure to a file.
/// </summary>
/// <param name="listingData">The XTVD entity.</param>
/// <param name="filename">The filename.</param>
private static void WriteXTVD(SchedulesDirect.SoapEntities.XTVD listingData, string filename)
{
Log.WriteFile("Debug mode enabled - dumping data to SchedulesDirect.xml");
System.Xml.XmlWriterSettings settings = new System.Xml.XmlWriterSettings();
settings.Indent = true;
using (System.Xml.XmlWriter writer = System.Xml.XmlWriter.Create(filename, settings))
{
listingData.WriteTo(writer);
}
}
/// <summary>
/// Gets a MD5 hash for the collection of stations and returns as a Base64 string
/// </summary>
/// <param name="tvStations">The tv stations.</param>
/// <returns>Base64 string</returns>
protected static string GetStationsHash(SchedulesDirect.SoapEntities.TVStations tvStations)
{
// We create a string with all the ID values from the channels and return an base64 MD5 hash
System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
StringBuilder sb = new StringBuilder();
tvStations.List.Sort(); // Sort the list so order changes will not effect the hash
foreach (SchedulesDirect.SoapEntities.TVStation tvStation in tvStations.List)
{
sb.Append(tvStation.ID);
}
return Convert.ToBase64String(md5.ComputeHash(Encoding.Unicode.GetBytes(sb.ToString())));
}
