Add db migration for Metadata Profile's Ignored to List

src/NzbDrone.Core/Datastore/Migration/033_metadata_profile_ignored_to_list.cs

@@ -0,0 +1,69 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Linq;
+using Dapper;
+using FluentMigrator;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using NzbDrone.Common.Serializer;
+using NzbDrone.Core.Datastore.Migration.Framework;
+
+namespace NzbDrone.Core.Datastore.Migration
+{
+    [Migration(033)]
+    public class metadata_profile_ignored_to_list : NzbDroneMigrationBase
+    {
+        protected override void MainDbUpgrade()
+        {
+            Execute.WithConnection(MigrateMetadataProfileIgnored);
+        }
+
+        private void MigrateMetadataProfileIgnored(IDbConnection conn, IDbTransaction tran)
+        {
+            var updatedMetadataProfiles = new List<object>();
+
+            using (var selectCommand = conn.CreateCommand())
+            {
+                selectCommand.Transaction = tran;
+                selectCommand.CommandText = "SELECT \"Id\", \"Ignored\" FROM \"MetadataProfiles\"";
+
+                using var reader = selectCommand.ExecuteReader();
+
+                while (reader.Read())
+                {
+                    var id = reader.GetInt32(0);
+                    var ignored = reader.GetValue(1).ToString() ?? string.Empty;
+
+                    if (!string.IsNullOrWhiteSpace(ignored))
+                    {
+                        try
+                        {
+                            JsonConvert.DeserializeObject<JArray>(ignored);
+
+                            continue;
+                        }
+                        catch (Exception)
+                        {
+                            // ignored
+                        }
+                    }
+
+                    ignored = ignored
+                        .Split(',', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries)
+                        .Distinct()
+                        .ToJson();
+
+                    updatedMetadataProfiles.Add(new
+                    {
+                        Id = id,
+                        Ignored = ignored
+                    });
+                }
+            }
+
+            var updatedMetadataProfilesSql = "UPDATE \"MetadataProfiles\" SET \"Ignored\" = @Ignored WHERE \"Id\" = @Id";
+            conn.Execute(updatedMetadataProfilesSql, updatedMetadataProfiles, transaction: tran);
+        }
+    }
+}