Refactor: Remove Activity model and related code

- Deleted the Activity model and its references in the profileController and userCacheService.
- Updated profileRoutes to remove the getUserActivity endpoint.
- Cleaned up userCacheService by removing caching methods for user activity.
- Adjusted profileController to streamline user profile management.

Enhancement: Introduce timezone utility functions

- Added timezone.js with utility functions for handling IST (Indian Standard Time).
- Implemented functions to get IST date bounds, format dates, and check if timestamps fall within today or yesterday in IST.
- Updated challengeController, platformsController, and postPOTD utility to utilize new timezone functions for date handling.

Improvement: Optimize challenge and user streak logic

- Refactored challengeController and postPOTD to use new timezone utilities for date comparisons.
- Simplified logic for checking if challenges were solved today or yesterday based on IST.

Cleanup: Remove unused imports and comments

- Removed commented-out code and unnecessary imports across various controllers and middleware for better readability.
- Cleaned up error handling and logging in middleware to reduce clutter.

Author: codevoid048

client-test/src/components/ProfilePage/index.tsx

@@ -80,14 +80,13 @@ export default function ProfilePage() {
   const [error, setError] = useState(null)
   const [selectedYear, setSelectedYear] = useState(new Date().getFullYear())
 
-  // Account deletion modal states
+
   const [showDeleteModal, setShowDeleteModal] = useState(false)
   const [showConfirmation, setShowConfirmation] = useState(false)
   const [usernameInput, setUsernameInput] = useState("")
   const [isDeleting, setIsDeleting] = useState(false)
   const [deleteError, setDeleteError] = useState("")
 
-  // Create a derived heatmap from solveChallenges
   const generateHeatmapFromSolveChallenges = (user: ProfileUser | null) => {
     if (!user || !user.solveChallenges) return []
 
@@ -300,7 +299,6 @@ export default function ProfilePage() {
     )
   }
 
-  // Calculate the number of problems solved in each difficulty using the solveChallenges object
   const problemsSolved = {
     total:
       (profileUser.solveChallenges?.easy?.length || 0) +
@@ -311,7 +309,6 @@ export default function ProfilePage() {
     hard: profileUser.solveChallenges?.hard?.length || 0,
   }
 
-  // Generate the heatmap data from solveChallenges
   const heatmap = generateHeatmapFromSolveChallenges(profileUser)
 
   interface GetDaysInMonthParams {
@@ -327,18 +324,6 @@ export default function ProfilePage() {
     count: number
   }
 
-  const generateContributions = (year: number): Contribution[] => {
-    const contributions: Contribution[] = []
-    const startDate = new Date(year, 0, 1)
-    const endDate = new Date(year, 11, 31)
-    for (let date = new Date(startDate); date <= endDate; date.setDate(date.getDate() + 1)) {
-      const count = Math.random() > 0.6 ? Math.floor(Math.random() * 10) : 0
-      contributions.push({ date: date.toISOString().split("T")[0], count })
-    }
-    return contributions
-  }
-
-  const contributions = generateContributions(selectedYear)
   const yearOptions = [new Date().getFullYear(), new Date().getFullYear() - 1, new Date().getFullYear() - 2]
 
   interface StreakParams {
@@ -353,14 +338,31 @@ export default function ProfilePage() {
     const currentCount = currentContrib ? currentContrib.count : 0
     if (currentCount === 0) return false
 
+    // Check previous day
     const prevDate = new Date(currentDate)
     prevDate.setDate(prevDate.getDate() - 1)
-    const prevContrib = contributions.find((c) => c.date === prevDate.toISOString().split("T")[0])
+    const prevDateString = prevDate.toISOString().split("T")[0]
+    const prevContrib = heatmap.find((item) => {
+      if (item.timestamp) {
+        const itemDate = new Date(item.timestamp).toISOString().split("T")[0]
+        return itemDate === prevDateString
+      }
+      return false
+    })
+
+    // Check next day
     const nextDate = new Date(currentDate)
     nextDate.setDate(nextDate.getDate() + 1)
-    const nextContrib = contributions.find((c) => c.date === nextDate.toISOString().split("T")[0])
+    const nextDateString = nextDate.toISOString().split("T")[0]
+    const nextContrib = heatmap.find((item) => {
+      if (item.timestamp) {
+        const itemDate = new Date(item.timestamp).toISOString().split("T")[0]
+        return itemDate === nextDateString
+      }
+      return false
+    })
 
-    return (prevContrib?.count ?? 0) > 0 || (nextContrib?.count ?? 0) > 0
+    return (prevContrib ? 1 : 0) > 0 || (nextContrib ? 1 : 0) > 0
   }
 
   const containerVariants = {

server/controllers/authController.js

@@ -2,7 +2,6 @@ import jwt from "jsonwebtoken"
 import bcrypt from "bcryptjs";
 import crypto from "crypto"; // For generating OTP
 import { User } from "../models/User.js"
-import { Activity } from "../models/Activity.js"
 import { sendOTPEmail, deleteConfirmationMail, sendResetPassEmail } from "../utils/emailService.js"
 import { isEmailValid } from "../utils/isEmailValid.js";
 import mongoose from "mongoose";

server/controllers/challengeController.js

@@ -5,6 +5,7 @@ import { fetchLeetCodeStatus, fetchCodeforcesStatus } from "./platformsControlle
 import { postPotdChallenge } from "../utils/postPOTD.js";
 import auditService from "../services/auditService.js";
 import { Category } from '../models/Category.js';
+import { getISTDateBounds, formatISTDateTimeString } from '../utils/timezone.js';
 
 export const getChallenges = async (req, res) => {
     try {
@@ -54,12 +55,7 @@ export const getChallenges = async (req, res) => {
         }
 
         // Date filter for challenges (exclude today's POTD)
-        const now = new Date();
-        const istOffset = 5.5 * 60 * 60 * 1000; // IST is UTC+5:30
-        const istNow = new Date(now.getTime() + istOffset);
-        const today = new Date(istNow);
-        today.setHours(0, 0, 0, 0);
-        const todayUTC = new Date(today.getTime() - istOffset);
+        const { start: todayUTC } = getISTDateBounds();
         filter.createdAt = { $lt: todayUTC };
 
         // Build aggregation pipeline for better performance
@@ -149,19 +145,8 @@ export const getDailyChallenge = async (req, res) => {
         const { userId } = req.query;
         const authenticatedUser = req.user;
 
-        // Create today's date in IST timezone
-        const now = new Date();
-        const istOffset = 5.5 * 60 * 60 * 1000; // IST is UTC+5:30
-        const istNow = new Date(now.getTime() + istOffset);
-        
-        const today = new Date(istNow);
-        today.setHours(0, 0, 0, 0);
-        const tomorrow = new Date(today);
-        tomorrow.setDate(tomorrow.getDate() + 1);
-
-        // Convert back to UTC for database query
-        const todayUTC = new Date(today.getTime() - istOffset);
-        const tomorrowUTC = new Date(tomorrow.getTime() - istOffset);
+        // Get today's IST date boundaries (returns UTC dates for database query)
+        const { start: todayUTC, end: tomorrowUTC } = getISTDateBounds();
 
         let dailyChallenge = await Challenge.findOne({
             createdAt: {
@@ -332,32 +317,8 @@ export const checkPOTDStatus = async (req, res) => {
         }
 
         if (responseStatus && responseStatus.success) {
-            const now = new Intl.DateTimeFormat("en-IN", {
-                timeZone: "Asia/Kolkata",
-                year: "numeric",
-                month: "2-digit",
-                day: "2-digit",
-                hour: "2-digit",
-                minute: "2-digit",
-                second: "2-digit",
-                hour12: false,
-            }).formatToParts(new Date());
-            
-            let year = "", month = "", day = "", hour = "", minute = "", second = "";
-            
-            now.forEach(part => {
-                if (part.type === "year") year = part.value;
-                if (part.type === "month") month = part.value;
-                if (part.type === "day") day = part.value;
-                if (part.type === "hour") hour = part.value;
-                if (part.type === "minute") minute = part.value;
-                if (part.type === "second") second = part.value;
-            });
-            
-            const timestamp = {
-                date: `${year}-${month}-${day}`,
-                time: `${hour}:${minute}:${second}`
-            };
+            // Use timezone utility to format IST timestamp
+            const timestamp = formatISTDateTimeString();
 
             const postresponse = await postPotdChallenge(userId, timestamp, dailyChallengeId, dailyChallenge.difficulty);
             if (postresponse.success) {

server/controllers/platformsController.js

@@ -5,6 +5,7 @@ import { fetchCodeforcesProfile, fetchLeetCodeProfile } from "../lib/leetcode.js
 import { Challenge } from "../models/Challenge.js";
 import { getGFGName } from "../utils/gfgService.js";
 import auditService from "../services/auditService.js";
+import { formatISTDateString, isWithinTodayIST } from '../utils/timezone.js';
 export const leetcodeData = async (req, res) => {
   try {
     const username = req.body.username; // Get username from request body
@@ -352,10 +353,10 @@ export const fetchLeetCodeStatus = async (username, challengeTitle) => {
       throw new Error("No submissions found");
     }
 
-    const today = new Date().toLocaleDateString("en-IN", { timeZone: "Asia/Kolkata" }).split('/').reverse().join('-');
-    
+    const today = formatISTDateString();
+
     const solvedToday = recentSubmissionList.some(submission => {
-      const submissionDate = new Date(parseInt(submission.timestamp) * 1000).toLocaleDateString("en-IN", { timeZone: "Asia/Kolkata" }).split('/').reverse().join('-');
+      const submissionDate = formatISTDateString(new Date(parseInt(submission.timestamp) * 1000));
       return submission.title === challengeTitle && submission.statusDisplay === "Accepted" && submissionDate === today;
     });
 
@@ -380,10 +381,10 @@ export const fetchCodeforcesStatus = async (username, challengeTitle) => {
       return { success: false, message: "Invalid Codeforces username or no submissions found" };
     }
 
-    const today = new Date().toLocaleDateString("en-IN", { timeZone: "Asia/Kolkata" }).split('/').reverse().join('-');
+    const today = formatISTDateString();
 
     const solvedProblem = submissions.result.find((submission) => {
-      const submissionDate = new Date(submission.creationTimeSeconds * 1000).toLocaleDateString("en-IN", { timeZone: "Asia/Kolkata" }).split('/').reverse().join('-');
+      const submissionDate = formatISTDateString(new Date(submission.creationTimeSeconds * 1000));
       return submission.problem.name === challengeTitle && submission.verdict === "OK" && submissionDate === today;
     });