Adding artificial node type ids for now

src/editor/js/structures/graph/graph.ts

@@ -305,7 +305,12 @@ export class Graph extends ManagedData {
             // No need to replace node ids with proper node objects, since that should be done in the graph itself. Only have to prepare valid GraphData
         });
 
-        // Collect all node types
+        // Collect all node types and give id of none given yet
+        let typeId: number = undefined;
+        if (data.nodes[0].type.id === undefined) {
+            typeId = 0;
+        }
+
         // TODO: Remove, when types are directly parsed and not just implicit
         data.nodes.forEach((node) => {
             const sharedType: NodeType = data.types.find(
@@ -318,6 +323,11 @@ export class Graph extends ManagedData {
                 return;
             }
 
+            if (typeId !== undefined) {
+                node.type.id = typeId;
+                typeId += 1;
+            }
+
             // Doesn't exist in list yet, so add
             data.types.push(node.type);
         });