Add save to json/yaml (ctrl-w)

src/Tree/ArrayNode.php

@@ -27,5 +27,10 @@ class ArrayNode extends Node implements CollapsibleNode
         return new ArrayNode($items);
     }
 
+    public function jsonSerialize(): mixed
+    {
+        return array_values($this->items);
+    }
+
 }
 

src/Tree/Node.php

@@ -2,7 +2,9 @@
 
 namespace NoccyLabs\JEdit\Tree;
 
-abstract class Node
+use JsonSerializable;
+
+abstract class Node implements JsonSerializable
 {
 }
 

src/Tree/ObjectNode.php

@@ -29,5 +29,10 @@ class ObjectNode extends Node implements CollapsibleNode
         return new ObjectNode($properties);
     }
 
+    public function jsonSerialize(): mixed
+    {
+        return $this->properties;
+    }
+
 }
 

src/Tree/Tree.php

@@ -13,6 +13,18 @@ class Tree
         return $this;
     }
 
+    public function save(): mixed
+    {
+        if (!$this->root) 
+            return null;
+        
+        return json_decode(
+            json_encode(
+                $this->root
+            )
+        );
+    }
+
     private function parseNode(mixed $node): Node
     {
         if (is_array($node) && array_is_list($node)) {

src/Tree/ValueNode.php

@@ -7,5 +7,10 @@ class ValueNode extends Node
     public function __construct(public mixed $value)
     {
     }
+
+    public function jsonSerialize(): mixed
+    {
+        return $this->value;
+    }
 }