public async Task ProcessNewSpotifyAlbums(ILogger logger)
{
logger.LogInformation("ProcessNewSpotifyAlbums start");
//Get all saved Artists
var allArtistsOutput = await _artistAppService.GetAll(new GetAllArtistsInput { IncludeAlbums = true });
if (allArtistsOutput.HasError)
{
logger.LogError(allArtistsOutput.ErrorMessage);
return;
}
logger.LogInformation("Found {0} saved artists", allArtistsOutput.Artists.Count);
//An album is only considered a new release if its ReleaseDate was in the last 14 days
DateTime newReleaseCutoff = DateTime.UtcNow.AddDays(-14);
foreach (var artist in allArtistsOutput.Artists)
{
var artistAlbumsOutput = await _spotifyAppService.GetAlbumsForArtist(new GetAlbumsForArtistInput
{
SpotifyArtistId = artist.SpotifyId
});
if (artistAlbumsOutput.HasError)
{
logger.LogError(artistAlbumsOutput.ErrorMessage);
//Don't let one artist error stop the entire thing from running, skip and move on to the next
continue;
}
//If the album came out recently and we don't know about it (ie it wasn't under the Artist.Albums collection),
//then we want to notify about it
var newReleaseAlbums = artistAlbumsOutput.Albums
.Where(a => a.ReleaseDateNormalised >= newReleaseCutoff &&
!artist.Albums.Any(al => al.Album.SpotifyId == a.SpotifyId))
// Handle the most recent first
.Reverse()
.ToList();
if (newReleaseAlbums.Any())
{
logger.LogInformation("Found {0} new release albums for SpotifyArtistId: {1}", newReleaseAlbums.Count, artist.SpotifyId);
var subscriptionsOutput = await _subscriptionAppService.GetSubscriptionsForArtist(new GetSubscriptionsForArtistInput
{
ArtistId = artist.Id
});
if (subscriptionsOutput.HasError)
{
logger.LogError(subscriptionsOutput.ErrorMessage);
//Don't let one error stop the entire thing from running, skip and move on to the next
continue;
}
if (subscriptionsOutput.Subscriptions.Any())
{
// Generally there will just be one newReleaseAlbum. Doesn't matter if we send multiple emails per artist
// in the rare case that more than one unique new release came out for them.
// Nov 2021: Spotify adds multiple versions of the same album at once, with different variations on the
// capitalisation of the name or other details. This is very annoying. Attempt to only notify about one version by keeping track
// of the names.
// We have called Reverse on the albums above to handle the most recent first, hopefully the most recent copy is the most "correct" one.
var notifiedAlbumNames = new List <string>();
foreach (var newReleaseAlbum in newReleaseAlbums)
{
string normalisedAlbumName = newReleaseAlbum.Name.ToLowerInvariant().Trim();
if (!notifiedAlbumNames.Contains(normalisedAlbumName))
{
// Send notification for all subscriptions
var notifyOutput = await _subscriberAppService.NotifySubscribers(new NotifySubscribersInput
{
Artist = artist,
Album = newReleaseAlbum,
Subscriptions = subscriptionsOutput.Subscriptions
});
if (notifyOutput.HasError)
{
logger.LogError(notifyOutput.ErrorMessage);
// Don't let one error stop the entire thing from running, skip and move on to the next
continue;
}
notifiedAlbumNames.Add(normalisedAlbumName);
}
}
}
//Save new albums to database
var albumsOutput = await _albumAppService.CreateAlbums(new CreateAlbumsInput
{
Artist = artist,
Albums = newReleaseAlbums
});
if (albumsOutput.HasError)
{
logger.LogError(albumsOutput.ErrorMessage);
//Don't let one error stop the entire thing from running, skip and move on to the next
continue;
}
}
}
logger.LogInformation("ProcessNewSpotifyAlbums end");
}