Try to fix deserializing cardigann definitions

src/NzbDrone.Common/Serializer/System.Text.Json/DictionaryStringObjectConverter.cs

@@ -0,0 +1,105 @@
+using System;
+using System.Collections.Generic;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace NzbDrone.Common.Serializer
+{
+    public class DictionaryStringObjectConverter : JsonConverter<Dictionary<string, object>>
+    {
+        public override Dictionary<string, object> Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType != JsonTokenType.StartObject)
+            {
+                throw new JsonException($"JsonTokenType was of type {reader.TokenType}, only objects are supported");
+            }
+
+            var dictionary = new Dictionary<string, object>();
+            while (reader.Read())
+            {
+                if (reader.TokenType == JsonTokenType.EndObject)
+                {
+                    return dictionary;
+                }
+
+                if (reader.TokenType != JsonTokenType.PropertyName)
+                {
+                    throw new JsonException("JsonTokenType was not PropertyName");
+                }
+
+                var propertyName = reader.GetString();
+
+                if (string.IsNullOrWhiteSpace(propertyName))
+                {
+                    throw new JsonException("Failed to get property name");
+                }
+
+                reader.Read();
+
+                dictionary.Add(propertyName, ExtractValue(ref reader, options));
+            }
+
+            return dictionary;
+        }
+
+        public override void Write(Utf8JsonWriter writer, Dictionary<string, object> dictionary, JsonSerializerOptions options)
+        {
+            writer.WriteStartObject();
+
+            foreach (var kvp in dictionary)
+            {
+                writer.WritePropertyName(kvp.Key.ToString());
+
+                JsonSerializer.Serialize(writer, kvp.Value, options);
+            }
+
+            writer.WriteEndObject();
+        }
+
+        private object ExtractValue(ref Utf8JsonReader reader, JsonSerializerOptions options)
+        {
+            switch (reader.TokenType)
+            {
+                case JsonTokenType.String:
+                    if (reader.TryGetDateTime(out var date))
+                    {
+                        return date;
+                    }
+
+                    return reader.GetString();
+
+                case JsonTokenType.False:
+                    return false;
+
+                case JsonTokenType.True:
+                    return true;
+
+                case JsonTokenType.Null:
+                    return null;
+
+                case JsonTokenType.Number:
+                    if (reader.TryGetInt64(out var result))
+                    {
+                        return result;
+                    }
+
+                    return reader.GetDecimal();
+
+                case JsonTokenType.StartObject:
+                    return Read(ref reader, null, options);
+
+                case JsonTokenType.StartArray:
+                    var list = new List<object>();
+                    while (reader.Read() && reader.TokenType != JsonTokenType.EndArray)
+                    {
+                        list.Add(ExtractValue(ref reader, options));
+                    }
+
+                    return list;
+
+                default:
+                    throw new JsonException($"'{reader.TokenType}' is not supported");
+            }
+        }
+    }
+}