Adding in fromJSONData() fct (#131)

* Adding fromJSONData() fct

* Update viewbasedjsonmodel.ts

Co-authored-by: Kaia Young <[email protected]>

Author: supriyakhandekar

src/core/viewbasedjsonmodel.ts

@@ -7,7 +7,7 @@ import {
 } from '@lumino/algorithm';
 
 import {
-  ReadonlyJSONObject, ReadonlyJSONValue
+  ReadonlyJSONObject, ReadonlyJSONValue, JSONExt
 } from '@lumino/coreutils';
 
 import {
@@ -446,6 +446,36 @@ export class ViewBasedJSONModel extends MutableDataModel {
     return this.currentView.getSchemaIndex(region, index)
   }
 
+  /**
+   * Deep copies data object and mutates it before
+   * returning a ViewBasedJSONModel of the data. 
+   * ts-ignores are added since the properties to be mutated
+   * are readonly 
+   * 
+   * @param data - Data passed in to be transformed
+   * 
+   */
+  static fromJsonData(data: ViewBasedJSONModel.IData): ViewBasedJSONModel {
+    const primaryKeyUuid = "ipydguuid";
+
+    let newData = <ViewBasedJSONModel.IData><unknown>JSONExt.deepCopy(<ReadonlyJSONObject><unknown>data);
+
+    //@ts-ignore
+    newData.schema.primaryKeyUuid = primaryKeyUuid;
+
+    for (let field of newData.schema.fields) {
+      //@ts-ignore
+      field.rows = [field.name];
+    }
+    let count = 0;
+    for (let row of newData.data) {
+      //@ts-ignore
+      row[primaryKeyUuid] = count++;
+    }
+
+    return new ViewBasedJSONModel(newData);
+  }
+
   private _currentView: View;
   private _transformSignal = new Signal<this, TransformStateManager.IEvent>(this);
   private _dataSyncSignal = new Signal<this, ViewBasedJSONModel.IDataSyncEvent>(this);
@@ -588,4 +618,4 @@ namespace ViewBasedJSONModel {
      */
     indices: number[];
   }
-}
+}