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using System.Collections.Generic;
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using System.Data;
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using System.Linq;
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using Dapper;
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using NzbDrone.Common.Extensions;
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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 CleanupUnusedTags : IHousekeepingTask
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{
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private readonly IMainDatabase _database;
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public CleanupUnusedTags(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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var usedTags = new[] { "Movies", "Notifications", "DelayProfiles", "ReleaseProfiles", "ImportLists", "Indexers", "AutoTagging", "DownloadClients" }
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.SelectMany(v => GetUsedTags(v, mapper))
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.Distinct()
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.ToList();
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if (usedTags.Any())
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{
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var usedTagsList = usedTags.Select(d => d.ToString()).Join(",");
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if (_database.DatabaseType == DatabaseType.PostgreSQL)
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{
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mapper.Execute($"DELETE FROM \"Tags\" WHERE NOT \"Id\" = ANY (\'{{{usedTagsList}}}\'::int[])");
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}
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else
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{
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mapper.Execute($"DELETE FROM \"Tags\" WHERE NOT \"Id\" IN ({usedTagsList})");
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}
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}
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else
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{
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mapper.Execute("DELETE FROM \"Tags\"");
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}
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}
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private int[] GetUsedTags(string table, IDbConnection mapper)
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{
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return mapper.Query<List<int>>($"SELECT DISTINCT \"Tags\" FROM \"{table}\" WHERE NOT \"Tags\" = '[]' AND NOT \"Tags\" IS NULL")
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.SelectMany(x => x)
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.Distinct()
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.ToArray();
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}
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}
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}
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