refactor: create utility for nested templates

packages/utils/src/common/arrayUtils.ts

@@ -0,0 +1,56 @@
+/**
+ * Inserts an item in an array at a given index
+ * @param index
+ * @param item
+ * @param array
+ */
+export function insertAtIndex<T>(index: number, item: T, array: T[]): T[] {
+  const modifiedArray = [...array];
+
+  // Insert at beginning
+  if (index === 0) {
+    modifiedArray.unshift(item);
+  }
+
+  // insert at end
+  else if (index >= modifiedArray.length) {
+    modifiedArray.push(item);
+  }
+
+  // insert in the middle
+  else {
+    modifiedArray.splice(index, 0, item);
+  }
+
+  return modifiedArray;
+}
+
+/**
+ * Deletes array element at a given index
+ * @param index
+ * @param array
+ */
+export function deleteAtIndex<T>(index: number, array: T[]) {
+  return array.toSpliced(index, 1);
+}
+
+/**
+ * Reorders two objects in an array
+ * @param array
+ * @param fromIndex
+ * @param toIndex
+ */
+export function reorderArray<T>(array: T[], fromIndex: number, toIndex: number) {
+  if (fromIndex === toIndex) {
+    return array; // No change needed, return the original array
+  }
+
+  const modifiedArray = [...array];
+
+  // delete in from
+  const [reorderedItem] = modifiedArray.splice(fromIndex, 1);
+
+  // reinsert item at to
+  modifiedArray.splice(toIndex, 0, reorderedItem);
+  return modifiedArray;
+}