[refactor]: Optimise daily problem fetching

popup/src/Components/DailyProblem.jsx

@@ -1,30 +1,54 @@
 import { useEffect, useState } from "react";
 import PropTypes from "prop-types";
+import useLocalStorage from "./useLocalStorage";
 
 DailyProblem.propTypes = {
   setReqErr: PropTypes.func.isRequired,
 };
 
-export default function DailyProblem({ setReqErr }) {
-  const [data, setData] = useState({});
+function getGSTDate() {
+  const now = new Date();
+  return `${now.getUTCFullYear()}${now.getUTCMonth() + 1}${now.getUTCDate()}`;
+}
+
+function useDailyProblem(setReqErr) {
+  const [data, setData] = useState(null);
   const [isLoading, setIsLoading] = useState(false);
   const [error, setError] = useState("");
+  const [daily, setDaily] = useLocalStorage(null, "dailyProblem");
 
   useEffect(() => {
     const fetchDailyProblem = async () => {
+      let dataJson;
       try {
         setIsLoading(true);
         setError("");
 
-        const res = await fetch(`https://alfa-leetcode-api.onrender.com/daily`);
-        if (!res.ok) {
-          if (res.status === 429) setReqErr(true);
-          else setError("Failed to fetch the daily problem");
+        if (daily && daily.date === getGSTDate()) {
+            dataJson = daily.data;
+        } else {
+          const res = await fetch(
+            `https://alfa-leetcode-api.onrender.com/daily`
+          );
+          if (!res.ok) {
+            if (res.status === 429) setReqErr(true);
+            else setError("Failed to fetch the daily problem");
+          }
+          dataJson = await res.json();
+          setDaily({
+            data: {
+              questionLink: dataJson.questionLink,
+              questionTitle: dataJson.questionTitle,
+              difficulty: dataJson.difficulty,
+            },
+            date: getGSTDate(),
+          });
         }
-
-        const data = await res.json();
-        setData(data);
-        setError("");
+        setData({
+          questionLink: dataJson.questionLink,
+          questionTitle: dataJson.questionTitle,
+          difficulty: dataJson.difficulty,
+        });
       } catch (err) {
         setError(err);
       } finally {
@@ -35,17 +59,18 @@ export default function DailyProblem({ setReqErr }) {
     fetchDailyProblem();
   }, []);
 
+  return { data, isLoading, error };
+}
+
+export default function DailyProblem({ setReqErr }) {
+  const { data, isLoading, error } = useDailyProblem(setReqErr);
   const getDifficultyColor = (difficulty) => {
-    switch (difficulty) {
-      case "Easy":
-        return "bg-lp-green-dark";
-      case "Medium":
-        return "bg-lp-yellow-dark";
-      case "Hard":
-        return "bg-lp-red-dark";
-      default:
-        return "";
-    }
+    const colors = {
+      Easy: "bg-lp-green-dark",
+      Medium: "bg-lp-yellow-dark",
+      Hard: "bg-lp-red-dark",
+    };
+    return colors[difficulty] || "";
   };
 
   return (
@@ -55,12 +80,18 @@ export default function DailyProblem({ setReqErr }) {
         <div className="flex flex-col mb-2">
           <p className="font-medium text-sm">Daily Problem</p>
           <div>
-            <a href={data.questionLink}
-               target="_blank"
-               className="text-sm font-semibold underline mr-3 transition hover:text-[#1586ff]">
+            <a
+              href={data.questionLink}
+              target="_blank"
+              className="text-sm font-semibold underline mr-3 transition hover:text-[#1586ff]"
+            >
               {data.questionTitle}
             </a>
-            <span className={`text-sm font-semibold px-1 py-1 ${getDifficultyColor(data.difficulty)} rounded-md`}>
+            <span
+              className={`text-sm font-semibold px-1 py-1 ${getDifficultyColor(
+                data.difficulty
+              )} rounded-md`}
+            >
               {data.difficulty}
             </span>
           </div>