Waits now until the quiz is created in the db before returning an uploaded quiz

src/lib/async-for-each.ts

+export async function asyncForEach(array, callback): Promise<void> {
+  for (let index = 0; index < array.length; index++) {
+    await callback(array[index], index, array);
+  }
+}

src/routers/rest/QuizRouter.ts

@@ -33,6 +33,7 @@ import { QuizVisibility } from '../../enums/QuizVisibility';
 import { ExcelWorkbook } from '../../export/ExcelWorkbook';
 import { IQuizStatusPayload } from '../../interfaces/IQuizStatusPayload';
 import { IQuizEntity, IQuizSerialized } from '../../interfaces/quizzes/IQuizEntity';
+import { asyncForEach } from '../../lib/async-for-each';
 import { MatchTextToAssetsDb } from '../../lib/cache/assets';
 import { Leaderboard } from '../../lib/leaderboard/leaderboard';
 import { QuizModel } from '../../models/quiz/QuizModelItem';
@@ -140,10 +141,10 @@ export class QuizRouter extends AbstractRouter {
   }
 
   @Post('/upload')
-  public uploadQuiz(
+  public async uploadQuiz(
     @HeaderParam('authorization') privateKey: string, //
     @UploadedFiles('uploadFiles[]') uploadedFiles: any, //
-  ): object {
+  ): Promise<object> {
 
     const duplicateQuizzes = [];
     const quizData = [];
@@ -155,7 +156,7 @@ export class QuizRouter extends AbstractRouter {
       });
     });
 
-    quizData.forEach((data: { fileName: string, quiz: IQuizEntity }) => {
+    await asyncForEach(quizData, async (data: { fileName: string, quiz: IQuizEntity }) => {
       const existingQuiz = QuizDAO.getQuizByName(data.quiz.name);
       if (existingQuiz) {
         duplicateQuizzes.push({
@@ -174,7 +175,7 @@ export class QuizRouter extends AbstractRouter {
           throw result;
         }
 
-        quizValidator.save();
+        await quizValidator.save();
       }
     });