Netcore: Migration of Model classes from Umbraco.Infrastructure to Core (#9404)

* Migrating more model, mapping and tree classes

* Migrating files from Mapping dir without Newtonsoft dependency

* Migrating files from PublishedContent and Editors dirs without Newtonsoft dependency + some more of the same kind

* Migrating DataType class without the usage of Newtonsoft.Json and making the corresponding changes to all classes affected

* Combining 3 ContentExtensions files into 1

* Refactoring from migrating ContentExtensions

* Migrating more classes

* Migrating ContentRepositoryExtensions - combining it with existing file in Umbraco.Core

* removing Newtonsoft json dependency & migrating file. Adding partial migration of ConfigurationEditor, so PropertyTagsExtensions can be migrated

* Migrating ContentTagsExtensions, and refactoring from changes in PropertyTagsExtensions

* Changes that should be reverted once ConfigurationEditor class is fully migrated

* VS couldn't find Composing, so build was failing. Removing the using solves the problem

* Handling a single case for deserializing a subset of an input

* Small changes and added tests to JsonNetSerializer

Signed-off-by: Bjarke Berg <mail@bergmania.dk>

* Migrated ConfigurationEditor

Signed-off-by: Bjarke Berg <mail@bergmania.dk>

Co-authored-by: Bjarke Berg <mail@bergmania.dk>

src/Umbraco.Infrastructure/Serialization/JsonNetSerializer.cs

@@ -1,28 +1,44 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
 
 namespace Umbraco.Core.Serialization
 {
     public class JsonNetSerializer : IJsonSerializer
     {
-        private static readonly JsonConverter[] _defaultConverters = new JsonConverter[]
+        protected static readonly JsonSerializerSettings JsonSerializerSettings = new JsonSerializerSettings()
         {
-            new StringEnumConverter()
+            Converters = new List<JsonConverter>()
+            {
+                new StringEnumConverter()
+            }
         };
-
         public string Serialize(object input)
         {
-            return JsonConvert.SerializeObject(input, _defaultConverters);
+            return JsonConvert.SerializeObject(input, JsonSerializerSettings);
         }
 
         public T Deserialize<T>(string input)
         {
-            return JsonConvert.DeserializeObject<T>(input, _defaultConverters);
+            return JsonConvert.DeserializeObject<T>(input, JsonSerializerSettings);
+        }
+
+        public T DeserializeSubset<T>(string input, string key)
+        {
+            if (key == null) throw new ArgumentNullException(nameof(key));
+
+            var root = JsonConvert.DeserializeObject<JObject>(input);
+
+            var jToken = root.SelectToken(key);
+
+            return jToken switch
+            {
+                JArray jArray => jArray.ToObject<T>(),
+                JObject jObject => jObject.ToObject<T>(),
+                _ => jToken is null ? default : jToken.Value<T>()
+            };
         }
     }
 }