Debug WIP

Author: Greg

js/datagrid.ts

@@ -374,7 +374,7 @@ export class DataGridModel extends DOMWidgetModel {
     transforms: { deserialize: unpack_models as any },
     renderers: {
       deserialize: unpack_models as any,
-      serialize: pack_models as any,
+      serialize: debug as any,
     },
     corner_renderer: { deserialize: unpack_models as any },
     default_renderer: { deserialize: unpack_models as any },
@@ -400,6 +400,40 @@ export class DataGridModel extends DOMWidgetModel {
   _view_callbacks: ICallbacks;
 }
 
+function debug(value: any) {
+  const upm = debug_pack_models(value);
+  console.log('first', value);
+  console.log('upm', upm);
+  return upm;
+}
+const IPY_MODEL_ = 'IPY_MODEL_';
+
+function debug_pack_models(
+  value: WidgetModel | Dict<WidgetModel> | WidgetModel[] | any,
+  widget?: WidgetModel,
+): any | Dict<unknown> | string | (Dict<unknown> | string)[] {
+  if (Array.isArray(value)) {
+    console.log('array');
+    const model_ids: string[] = [];
+    for (const model of value) {
+      model_ids.push(pack_models(model, widget));
+    }
+    return model_ids;
+  } else if (value instanceof WidgetModel) {
+    console.log('widget model');
+    return `${IPY_MODEL_}${value.model_id}`;
+  } else if (value instanceof Object && typeof value !== 'string') {
+    console.log('object');
+    const packed: { [key: string]: string } = {};
+    for (const [key, sub_value] of Object.entries(value)) {
+      packed[key] = pack_models(sub_value, widget);
+    }
+    return packed;
+  } else {
+    return value;
+  }
+}
+
 /**
  * Helper function to convert snake_case strings to camelCase.
  * Assumes all strings are valid snake_case (all lowercase).