/// <summary>
/// Exports all feeds listed in a <see cref="Selections"/> document along with any OpenPGP public key files required for validation.
/// </summary>
/// <param name="feedCache">Used to get local feed files.</param>
/// <param name="openPgp">Used to get export keys feeds were signed with.</param>
/// <exception cref="UnauthorizedAccessException">The file could not be read or written.</exception>
/// <exception cref="UnauthorizedAccessException">Write access to the directory is not permitted.</exception>
/// <exception cref="IOException">A feed or GnuPG could not be read from the cache.</exception>
public void ExportFeeds(IFeedCache feedCache, IOpenPgp openPgp)
{
#region Sanity checks
if (feedCache == null)
{
throw new ArgumentNullException(nameof(feedCache));
}
if (openPgp == null)
{
throw new ArgumentNullException(nameof(openPgp));
}
#endregion
string contentDir = Path.Combine(_destination, "content");
Directory.CreateDirectory(contentDir);
var feedUris = _selections.Implementations
.SelectMany(x => new [] { x.InterfaceUri, x.FromFeed })
.WhereNotNull().Distinct().ToList();
foreach (var feedUri in feedUris)
{
string filePath = Path.Combine(contentDir, feedUri.PrettyEscape());
if (!filePath.EndsWith(".xml"))
{
filePath += ".xml";
}
string?path = feedCache.GetPath(feedUri);
if (path != null)
{
Log.Info("Exporting feed " + feedUri.ToStringRfc());
File.Copy(path, filePath, overwrite: true);
}
}
foreach (var signature in feedUris.SelectMany(feedCache.GetSignatures).OfType <ValidSignature>().Distinct())
{
Log.Info("Exporting GPG key " + signature.FormatKeyID());
openPgp.DeployPublicKey(signature, contentDir);
}
}