/**
* Download the provider EPG data and build the local EPG.
*/
public async Task UpdateEPG(ProviderChannels channels)
{
// Log the start of this long running update process.
config.WriteLog(false, "Beginning provider EPG update for {0}.", config.EPGURL);
// Build a skeleton EPG using the channels in the lineup.
EPGBuilder epg = new EPGBuilder(config, lineup);
epg.CreateChannels(channels);
// Fetch and merge the EPG from the provider.
using (HttpClient client = new HttpClient())
{
var res = await client.GetStreamAsync(config.EPGURL);
var streamReader = new StreamReader(res);
epg.MergeXMLTV(streamReader);
}
// Serialize the EPG items to epg.xml on disk.
var outputPath = Path.Combine(config.DataPath, "epg.xml");
epg.WriteToDisk(outputPath);
// Log the end of this long running update process.
config.WriteLog(false, "Wrote updated local EPG to {0}.", outputPath);
}
/**
* Create a channel element in the EPG for each local channel.
*/
public void CreateChannels(ProviderChannels channels)
{
channels.ForEach(channel =>
{
// Find the local channel number associated with the channel ID.
var channelNumber = lineup.Channels.Find(c => c.ID.Equals(channel.ID)).ChannelNumber;
// Ignore channels with duplicate IDs.
if (!epgChannels.ContainsKey(channel.ID))
{
var channelNode = new XElement("channel", new XAttribute("id", channel.ID),
new XElement("display-name", channel.Name),
new XElement("lcn", channelNumber));
// Add a logo if one is available.
if (!String.IsNullOrEmpty(channel.Logo))
{
channelNode.Add(new XElement("icon", new XAttribute("src", channel.Logo)));
}
// Remember that we've seen this channel ID.
epgChannels.Add(channel.ID, channelNode);
// Add this channel to the guide.
doc.Root.Add(channelNode);
}
});
}
/**
* Parse an M3U stream with a filter to remove unwanted entries.
*/
public async Task <ProviderChannels> Parse(StreamReader stream)
{
var currentEntry = new ProviderChannel();
var m3u = new ProviderChannels();
using (stream)
{
string line;
while ((line = await stream.ReadLineAsync()) != null)
{
if (line.StartsWith("#EXTM3U"))
{
// Ignore the header.
}
else
if (line.StartsWith("#EXTINF"))
{
// Populate the entry ID.
currentEntry.ID = extractAttribute(idRegex, line);
// Populate the entry name.
currentEntry.Name = extractAttribute(nameRegex, line);
if (logoRegex != null)
{
// Populate the entry logo.
currentEntry.Logo = extractAttribute(logoRegex, line);
}
if (groupRegex != null)
{
// Populate the entry group.
currentEntry.Group = extractAttribute(groupRegex, line);
}
}
else
if (line.StartsWith("#"))
{
// Ignore comments.
}
else
{
// Populate the entry URL.
currentEntry.URL = line;
// Filter entries from the list.
if ((Filter == null) || Filter.Invoke(currentEntry))
{
// Add the entry to the list.
m3u.Add(currentEntry);
}
// Moving to the next entry.
currentEntry = new ProviderChannel();
}
}
}
return(m3u);
}
