public async Task CheckForUnlimitedScreenings()
{
var externalUnlimitedFilms = await _apiClient.SearchUnlimitedFilms();
var localUnlimitedFilms = await _filmCache.Get(UnlimitedScreeningsCacheFile);
var isFirstRun = !localUnlimitedFilms.Any();
var existingLocalFilms = localUnlimitedFilms
.Where(x => externalUnlimitedFilms.Any(y => y.FeatureTitle == x.FeatureTitle))
.ToList();
var existingExternalFilms = externalUnlimitedFilms
.Where(x => localUnlimitedFilms.Any(y => y.FeatureTitle == x.FeatureTitle))
.ToList();
var filmsToRemove = localUnlimitedFilms
.Where(x => existingLocalFilms.All(y => y.FeatureTitle != x.FeatureTitle))
.ToList();
var localFileChanged = false;
if (filmsToRemove.Any())
{
RemoveFilms(localUnlimitedFilms, filmsToRemove);
localFileChanged = true;
}
var addedExternalFilms = externalUnlimitedFilms
.Except(existingExternalFilms)
.ToList();
if (addedExternalFilms.Any())
{
if (!isFirstRun)
{
await _toastService.AnnounceUnlimitedScreenings(addedExternalFilms);
}
localUnlimitedFilms.AddRange(addedExternalFilms);
localFileChanged = true;
}
if (localFileChanged)
{
await WriteFilmsToFile(UnlimitedScreeningsCacheFile, localUnlimitedFilms);
_filmCache.ClearCache(UnlimitedScreeningsCacheFile);
}
}
