From 896b489498b8e61c1964616a09461e96fbf79187 Mon Sep 17 00:00:00 2001
From: Marco Escaleira <marcoescaleira2000@gmail.com>
Date: Mon, 15 Apr 2024 20:58:43 +0100
Subject: [PATCH] feat: generate quiz of the day with static variables

---
 schema.graphql                 |  3 +++
 src/resolvers/quiz.resolver.ts | 29 +++++++++++++++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/schema.graphql b/schema.graphql
index b08ec34..ac64ea0 100644
--- a/schema.graphql
+++ b/schema.graphql
@@ -196,6 +196,9 @@ type Query {
 
   """Get the list of all quizzes based on multiple filter."""
   quizList(country: String, status: QuizStatus): [QuizData!]!
+
+  """Get the quiz of the day"""
+  quizOfTheDay: QuizData!
   quizRating(quizId: String!): Int!
 
   """Get the list of all quizzes based on the country"""
diff --git a/src/resolvers/quiz.resolver.ts b/src/resolvers/quiz.resolver.ts
index f3e6cd2..5eed1e1 100644
--- a/src/resolvers/quiz.resolver.ts
+++ b/src/resolvers/quiz.resolver.ts
@@ -1,3 +1,4 @@
+import { differenceInCalendarDays } from 'date-fns';
 import { Arg, Authorized, Ctx, Mutation, Query, registerEnumType, Resolver } from 'type-graphql';
 import AttemptModel from '../models/attempt.model';
 import QuizModel from '../models/quiz.model';
@@ -120,4 +121,32 @@ export default class QuizResolver {
       errorHandler(error);
     }
   }
+
+  lastGeneratedQuiz: Date | undefined = undefined;
+  currentQuizOfDayId: any = undefined;
+
+  @Query(() => QuizData, { description: 'Get the quiz of the day' })
+  async quizOfTheDay() {
+    try {
+      // Generate the quiz of today if it's the first time
+      if (!this.lastGeneratedQuiz || !this.currentQuizOfDayId) {
+        const quizzes = await QuizModel.find();
+
+        this.lastGeneratedQuiz = new Date();
+        this.currentQuizOfDayId = quizzes[Math.floor(Math.random() * quizzes.length)];
+      }
+
+      // Generate the quiz of today
+      if (differenceInCalendarDays(new Date(), this.lastGeneratedQuiz) >= 1) {
+        const quizzes = await QuizModel.find();
+
+        this.lastGeneratedQuiz = new Date();
+        this.currentQuizOfDayId = quizzes[Math.floor(Math.random() * quizzes.length)];
+      }
+
+      return this.currentQuizOfDayId;
+    } catch (error) {
+      errorHandler(error);
+    }
+  }
 }