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using System;
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using System.Collections.Generic;
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using System.Text;
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using NzbDrone.Core.Datastore;
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namespace NzbDrone.Core.ArtistStats
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{
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public interface IArtistStatisticsRepository
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{
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List<AlbumStatistics> ArtistStatistics();
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List<AlbumStatistics> ArtistStatistics(int artistId);
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}
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public class ArtistStatisticsRepository : IArtistStatisticsRepository
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{
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private readonly IMainDatabase _database;
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public ArtistStatisticsRepository(IMainDatabase database)
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{
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_database = database;
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}
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public List<AlbumStatistics> ArtistStatistics()
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{
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var mapper = _database.GetDataMapper();
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mapper.AddParameter("currentDate", DateTime.UtcNow);
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var sb = new StringBuilder();
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sb.AppendLine(GetSelectClause());
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sb.AppendLine(GetTrackFilesJoin());
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sb.AppendLine(GetGroupByClause());
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var queryText = sb.ToString();
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return mapper.Query<AlbumStatistics>(queryText);
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}
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public List<AlbumStatistics> ArtistStatistics(int artistId)
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{
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var mapper = _database.GetDataMapper();
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mapper.AddParameter("currentDate", DateTime.UtcNow);
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mapper.AddParameter("artistId", artistId);
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var sb = new StringBuilder();
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sb.AppendLine(GetSelectClause());
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sb.AppendLine(GetTrackFilesJoin());
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sb.AppendLine("WHERE Tracks.ArtistId = @artistId");
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sb.AppendLine(GetGroupByClause());
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var queryText = sb.ToString();
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return mapper.Query<AlbumStatistics>(queryText);
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}
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private string GetSelectClause()
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{
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return @"SELECT Tracks.*, SUM(TrackFiles.Size) as SizeOnDisk FROM
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(SELECT
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Tracks.ArtistId,
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Tracks.AlbumId,
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SUM(CASE WHEN TrackFileId > 0 THEN 1 ELSE 0 END) AS TotalTrackCount,
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SUM(CASE WHEN Monitored = 1 OR TrackFileId > 0 THEN 1 ELSE 0 END) AS TrackCount,
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SUM(CASE WHEN TrackFileId > 0 THEN 1 ELSE 0 END) AS TrackFileCount
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FROM Tracks
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GROUP BY Tracks.ArtistId, Tracks.AlbumId) as Tracks";
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}
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private string GetGroupByClause()
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{
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return "GROUP BY Tracks.ArtistId, Tracks.AlbumId";
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}
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private string GetTrackFilesJoin()
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{
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return @"LEFT OUTER JOIN TrackFiles
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ON TrackFiles.ArtistId = Tracks.ArtistId
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AND TrackFiles.AlbumId = Tracks.AlbumId";
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}
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}
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}
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