more error resilience

src/DataStructures/DeegraphNodeDetails.php

@@ -14,9 +14,13 @@ class DeegraphNodeDetails
 
     public function __construct(array $nodeDetails)
     {
-        $this->ID = $nodeDetails["@id"];
+        file_put_contents(
-        $this->CreatedAt = new DateTime($nodeDetails["@created"]);
+            filename: __DIR__ . '/../../../../../LocalStorage/DevCache/' . (new DateTime())->format('u') . '.json',
-        $this->CreatorID = $nodeDetails["@creator"];
+            data: json_encode($nodeDetails)
+        );
+        // $this->ID = $nodeDetails["@id"];
+        // $this->CreatedAt = new DateTime($nodeDetails["@created"]);
+        // $this->CreatorID = $nodeDetails["@creator"];
 
         foreach($nodeDetails as $key=>$value) {
             switch($key)
@@ -39,10 +43,14 @@ class DeegraphNodeDetails
 
     public function AsJSON(): string
     {
+        $createdAt = null;
+        if (isset($this->CreatedAt))
+            $createdAt = $this->CreatedAt->format(format: 'Y-m-d\TH:i:s.v\Z');
+
         $builder = [
-            "@id" => $this->ID,
+            "@id" => $this->ID ?? null,
-            "@created" => $this->CreatedAt->format(format: 'Y-m-d\TH:i:s.v\Z'),
+            "@created" => $createdAt,
-            "@creator" => $this->CreatorID,
+            "@creator" => $this->CreatorID ?? null,
         ];
         foreach($this->OtherProperties as $key=>$value) {
             $builder[$key] = $value;