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using Dapper;
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using NzbDrone.Core.Datastore;
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namespace NzbDrone.Core.Housekeeping.Housekeepers
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{
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public class CleanupOrphanedArtistMetadata : IHousekeepingTask
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{
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private readonly IMainDatabase _database;
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public CleanupOrphanedArtistMetadata(IMainDatabase database)
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{
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_database = database;
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}
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public void Clean()
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{
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using (var mapper = _database.OpenConnection())
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{
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mapper.Execute(@"DELETE FROM ArtistMetadata
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WHERE Id IN (
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SELECT ArtistMetadata.Id FROM ArtistMetadata
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LEFT OUTER JOIN Albums ON Albums.ArtistMetadataId = ArtistMetadata.Id
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LEFT OUTER JOIN Tracks ON Tracks.ArtistMetadataId = ArtistMetadata.Id
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LEFT OUTER JOIN Artists ON Artists.ArtistMetadataId = ArtistMetadata.Id
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WHERE Albums.Id IS NULL AND Tracks.Id IS NULL AND Artists.Id IS NULL)");
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}
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}
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}
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}
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