Implemente parse json node having universal connector

Examples/Nodify.Calculator/Execution/Resolvers/NodeValueResolvers.cs

@@ -135,18 +135,48 @@ namespace Nodify.Calculator.Execution.Resolvers
     }
 
     // ─────────────────────────────────────────────────────────────────────────────
-    // PARSEJSON: passthrough (output = parsed form of input). For value-reading
-    // purposes we just forward the raw JSON downstream.
+    // PARSEJSON: takes any input, ensures it is valid JSON, then parses it.
+    // If the input is not valid JSON, it serializes it first, then forwards
+    // the JSON string downstream for the selected target type.
     // ─────────────────────────────────────────────────────────────────────────────
     internal sealed class ParseJsonNodeValueResolver : INodeValueResolver
     {
         public bool CanResolve(OperationViewModel node, ConnectorViewModel c)
-            => node is SystemOperationViewModel sys && sys.SystemOperationType == SystemOperations.PARSEJSON;
+            => node is ParseJsonOperationViewModel
+               || (node is SystemOperationViewModel sys && sys.SystemOperationType == SystemOperations.PARSEJSON);
 
         public string Resolve(OperationViewModel node, ConnectorViewModel outputConnector, IValueResolutionContext ctx)
         {
             var input = ResolverUtils.FirstDataInput(node);
-            return input == null ? null : ctx.Read(input);
+            if (input == null) return null;
+
+            var raw = ctx.Read(input);
+            if (string.IsNullOrEmpty(raw)) return null;
+
+            // Ensure we have valid JSON — if not, serialize the raw value
+            var trimmed = raw.Trim();
+            bool isJson = (trimmed.StartsWith("{") && trimmed.EndsWith("}"))
+                       || (trimmed.StartsWith("[") && trimmed.EndsWith("]"))
+                       || (trimmed.StartsWith("\"") && trimmed.EndsWith("\""));
+            if (!isJson)
+            {
+                try
+                {
+                    raw = Newtonsoft.Json.JsonConvert.SerializeObject(raw);
+                }
+                catch { /* keep raw as-is */ }
+            }
+
+            // Parse and re-serialize to ensure clean JSON output
+            try
+            {
+                var parsed = Newtonsoft.Json.JsonConvert.DeserializeObject(raw);
+                return Newtonsoft.Json.JsonConvert.SerializeObject(parsed);
+            }
+            catch
+            {
+                return raw;
+            }
         }
     }