public static string ImportSongPerformers(MusicHubDbContext context, string xmlString)
{
sb.Clear();
var serializer = new XmlSerializer(typeof(impXmlDtoPerformer[]), new XmlRootAttribute("Performers"));
int[] songIdsAvailable = context.Songs.Select(x => x.Id).ToArray();
var performerDtos = (impXmlDtoPerformer[])serializer.Deserialize(new StringReader(xmlString));
var performersToBeAdded = new Queue <Performer>();
foreach (var dto in performerDtos)
{
try
{
var newPerformer = new Performer()
{
FirstName = dto.FirstName,
LastName = dto.LastName,
Age = dto.Age,
NetWorth = dto.NetWorth,
PerformerSongs = dto.SongIds.Select(x => new SongPerformer()
{
SongId = x.SongId
}).ToHashSet()
};
if (MassAttributeValidator.IsValid(newPerformer))
{
if (newPerformer.PerformerSongs.Any(x => !songIdsAvailable.Contains(x.SongId)))
{
throw new InvalidOperationException($"This Performer can sing unknown songs");
}
if (dto.SongIds.Select(x => x.SongId).Distinct().Count() < dto.SongIds.Count())
{
throw new InvalidOperationException($"This Performer sings 1 song more than once!");
}
sb.AppendLine(string.Format(SuccessfullyImportedPerformer, dto.FirstName, dto.SongIds.Count));
performersToBeAdded.Enqueue(newPerformer);
continue;
}
throw new InvalidOperationException("incorrect data input MassValidator detected anomaly");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
sb.AppendLine(ErrorMessage);
}
}
context.Performers.AddRange(performersToBeAdded);
context.SaveChanges();
return(sb.ToString().Trim());
}
public static string ImportSongs(MusicHubDbContext context, string xmlString)
{
sb.Clear();
var serializer = new XmlSerializer(typeof(impXmlDtoSong[]), new XmlRootAttribute("Songs"));
int[] albumIdsAvailable = context.Albums.Select(x => x.Id).ToArray();
int[] writersIdsAvailable = context.Writers.Select(x => x.Id).ToArray();
var songsDtos = (impXmlDtoSong[])serializer.Deserialize(new StringReader(xmlString));
var songsToBeAdded = new Queue <Song>();
foreach (var dto in songsDtos)
{
try
{
Song newSong = Mapper.Map <Song>(dto);
if (MassAttributeValidator.IsValid(newSong))
{
if (dto.AlbumId != null && !albumIdsAvailable.Contains(dto.AlbumId.Value))
{
throw new InvalidOperationException($"Album with Id {dto.AlbumId.Value} does not exist in database!");
}
if (!writersIdsAvailable.Contains(dto.WriterId))
{
throw new InvalidOperationException($"Writer with Id {dto.WriterId} does not exist in database!");
}
sb.AppendLine(string.Format(SuccessfullyImportedSong, dto.Name, dto.Genre, dto.Duration));
songsToBeAdded.Enqueue(newSong);
continue;
}
throw new InvalidOperationException("incorrect data input MassValidator detected anomaly");
}
catch (Exception)
{
sb.AppendLine(ErrorMessage);
}
}
context.Songs.AddRange(songsToBeAdded);
context.SaveChanges();
return(sb.ToString().Trim());
}
public static string ImportWriters(MusicHubDbContext context, string jsonString)
{
Writer[] writersImported = JsonConvert.DeserializeObject <Writer[]>(jsonString);
sb.Clear();
var writersToBeAdded = new Queue <Writer>();
foreach (var writer in writersImported)
{
if (MassAttributeValidator.IsValid(writer))
{
writersToBeAdded.Enqueue(writer);
sb.AppendLine(string.Format(SuccessfullyImportedWriter, writer.Name));
continue;
}
sb.AppendLine(ErrorMessage);
}
context.Writers.AddRange(writersToBeAdded);
context.SaveChanges();
return(sb.ToString().Trim());
}
public static string ImportProducersAlbums(MusicHubDbContext context, string jsonString)
{
sb.Clear();
var producersDto = JsonConvert.DeserializeObject <impJsonDtoProducer[]>(jsonString);
var producersToBeAdded = new Queue <Producer>();
foreach (var dto in producersDto)
{
try
{
var newProducer = Mapper.Map <Producer>(dto);
if (MassAttributeValidator.IsValid(newProducer) && newProducer.Albums.All(x => MassAttributeValidator.IsValid(x)))
{
producersToBeAdded.Enqueue(newProducer);
if (string.IsNullOrEmpty(newProducer.PhoneNumber))
{
sb.AppendLine(string.Format(SuccessfullyImportedProducerWithNoPhone, newProducer.Name, newProducer.Albums.Count));
}
else
{
sb.AppendLine(string.Format(SuccessfullyImportedProducerWithPhone, newProducer.Name, newProducer.PhoneNumber, newProducer.Albums.Count));
}
}
else
{
throw new InvalidOperationException("incorrect data input MassValidator detected anomaly");
}
}
catch (Exception)
{
sb.AppendLine(ErrorMessage);
}
}
context.Producers.AddRange(producersToBeAdded);
context.SaveChanges();
return(sb.ToString().Trim());
}
