refactor: rearrange and add solution for 4-series

src/PepperDash.Essentials.Core/Extensions/JsonExtensions.cs

@@ -0,0 +1,44 @@
+extern alias Full;
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Crestron.SimplSharp;
+using Full.Newtonsoft.Json;
+using Full.Newtonsoft.Json.Linq;
+
+namespace PepperDash.Essentials.Core
+{
+    public static class JsonExtensions
+    {
+        public static List<JToken> FindTokens(this JToken containerToken, string name)
+        {
+            List<JToken> matches = new List<JToken>();
+            FindTokens(containerToken, name, matches);
+            return matches;
+        }
+
+        private static void FindTokens(JToken containerToken, string name, List<JToken> matches)
+        {
+            if (containerToken.Type == JTokenType.Object)
+            {
+                foreach (JProperty child in containerToken.Children<JProperty>())
+                {
+                    if (child.Name == name)
+                    {
+                        matches.Add(child.Value);
+                    }
+                    FindTokens(child.Value, name, matches);
+                }
+            }
+            else if (containerToken.Type == JTokenType.Array)
+            {
+                foreach (JToken child in containerToken.Children())
+                {
+                    FindTokens(child, name, matches);
+                }
+            }
+        }
+    }
+}

src/PepperDash.Essentials.Core/Extensions/StringExtensions.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Crestron.SimplSharp;
+
+namespace PepperDash.Essentials.Core
+{
+    public static class StringExtensions
+    {
+        public static string NullIfEmpty(this string s)
+        {
+            return string.IsNullOrEmpty(s) ? null : s;
+        }
+        public static string NullIfWhiteSpace(this string s)
+        {
+            return string.IsNullOrEmpty(s.Trim()) ? null : s;
+        }
+        public static string ReplaceIfNullOrEmpty(this string s, string newString)
+        {
+            return string.IsNullOrEmpty(s) ? newString : s;
+        }
+    }
+}