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157 lines
5.1 KiB
157 lines
5.1 KiB
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 FluentMigrator;
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using NzbDrone.Common.Serializer;
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using NzbDrone.Core.Datastore.Migration.Framework;
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namespace NzbDrone.Core.Datastore.Migration
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{
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[Migration(79)]
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public class dedupe_tags : NzbDroneMigrationBase
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{
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protected override void MainDbUpgrade()
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{
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Execute.WithConnection(CleanupTags);
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Alter.Table("Tags").AlterColumn("Label").AsString().Unique();
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}
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private void CleanupTags(IDbConnection conn, IDbTransaction tran)
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{
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var tags = GetTags(conn, tran);
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var grouped = tags.GroupBy(t => t.Label.ToLowerInvariant());
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var replacements = new List<TagReplacement079>();
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foreach (var group in grouped.Where(g => g.Count() > 1))
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{
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var first = group.First().Id;
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foreach (var other in group.Skip(1).Select(t => t.Id))
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{
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replacements.Add(new TagReplacement079 { OldId = other, NewId = first });
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}
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}
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UpdateTaggedModel(conn, tran, "Series", replacements);
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UpdateTaggedModel(conn, tran, "Notifications", replacements);
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UpdateTaggedModel(conn, tran, "DelayProfiles", replacements);
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UpdateTaggedModel(conn, tran, "Restrictions", replacements);
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DeleteTags(conn, tran, replacements);
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}
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private List<Tag079> GetTags(IDbConnection conn, IDbTransaction tran)
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{
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var tags = new List<Tag079>();
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using (var tagCmd = conn.CreateCommand())
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{
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tagCmd.Transaction = tran;
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tagCmd.CommandText = "SELECT \"Id\", \"Label\" FROM \"Tags\"";
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using (var tagReader = tagCmd.ExecuteReader())
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{
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while (tagReader.Read())
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{
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var id = tagReader.GetInt32(0);
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var label = tagReader.GetString(1);
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tags.Add(new Tag079 { Id = id, Label = label });
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}
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}
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}
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return tags;
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}
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private void UpdateTaggedModel(IDbConnection conn, IDbTransaction tran, string table, List<TagReplacement079> replacements)
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{
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var tagged = new List<TaggedModel079>();
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using (var tagCmd = conn.CreateCommand())
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{
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tagCmd.Transaction = tran;
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tagCmd.CommandText = string.Format("SELECT \"Id\", \"Tags\" FROM \"{0}\"", table);
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using (var tagReader = tagCmd.ExecuteReader())
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{
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while (tagReader.Read())
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{
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if (!tagReader.IsDBNull(1))
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{
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var id = tagReader.GetInt32(0);
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var tags = tagReader.GetString(1);
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tagged.Add(new TaggedModel079
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{
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Id = id,
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Tags = Json.Deserialize<HashSet<int>>(tags)
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});
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}
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}
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}
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}
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var toUpdate = new List<TaggedModel079>();
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foreach (var model in tagged)
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{
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foreach (var replacement in replacements)
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{
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if (model.Tags.Contains(replacement.OldId))
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{
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model.Tags.Remove(replacement.OldId);
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model.Tags.Add(replacement.NewId);
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toUpdate.Add(model);
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}
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}
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}
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var updatedTags = toUpdate.DistinctBy(m => m.Id).Select(t => new
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{
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Tags = t.Tags.ToJson(),
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Id = t.Id
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});
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var updateTagsSql = $"UPDATE \"{table}\" SET \"Tags\" = @Tags WHERE \"Id\" = @Id";
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conn.Execute(updateTagsSql, updatedTags, transaction: tran);
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}
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private void DeleteTags(IDbConnection conn, IDbTransaction tran, List<TagReplacement079> replacements)
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{
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var idsToRemove = replacements.Select(r => r.OldId).Distinct();
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if (idsToRemove.Any())
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{
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using (var removeCmd = conn.CreateCommand())
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{
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removeCmd.Transaction = tran;
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removeCmd.CommandText = $"DELETE FROM \"Tags\" WHERE \"Id\" IN ({string.Join(", ", idsToRemove)})";
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removeCmd.ExecuteNonQuery();
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}
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}
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}
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private class Tag079
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{
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public int Id { get; set; }
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public string Label { get; set; }
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}
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private class TagReplacement079
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{
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public int OldId { get; set; }
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public int NewId { get; set; }
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}
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private class TaggedModel079
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{
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public int Id { get; set; }
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public HashSet<int> Tags { get; set; }
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}
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}
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}
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