feat(frontend): created `pruneObject` and `pruneArray` utilities

services/frontend/src/utils/forms.ts

@@ -1,3 +1,5 @@
+import lodash from "lodash";
+
 export const checkArray = <T>(array: any, name: string): T => {
   if (!Array.isArray(array)) {
     throw new Error(
@@ -6,3 +8,19 @@ export const checkArray = <T>(array: any, name: string): T => {
   }
   return array as unknown as T;
 };
+
+export const pruneArray = <T>(array: (T | undefined)[]): T[] | undefined => {
+  const result = array.filter(Boolean);
+  if (array.length === 0) {
+    return undefined;
+  }
+  return result as T[];
+};
+
+export const pruneObject = <T>(object: T): unknown | undefined => {
+  const result = lodash.pickBy(object ?? {}, (value) => value !== undefined);
+  if (Object.keys(result).length === 0) {
+    return undefined;
+  }
+  return result as unknown;
+};