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⚡ Bolt: Optimize search filtering and date parsing #15

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⚡ Bolt: Optimize search filtering and date parsing #15

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60 changes: 53 additions & 7 deletions script.js
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Original file line number Diff line number Diff line change
Expand Up @@ -247,6 +247,15 @@ function getSimpleDeviceName() {
/* =========================================
4. UI HELPERS & ADS
========================================= */
function debounce(func, wait) {
let timeout;
return function(...args) {
const context = this;
clearTimeout(timeout);
timeout = setTimeout(() => func.apply(context, args), wait);
};
}

function handleGoToTopVisibility() {
if (window.scrollY > 400) {
goToTopBtn.classList.add('show');
Expand Down Expand Up @@ -382,6 +391,36 @@ window.changeSemester = function (sem) {
renderPDFs();
};

function prepareSearchIndex(pdfs) {
const now = new Date();
pdfs.forEach(pdf => {
// Optimization: Pre-calculate search string
pdf._searchStr = (
(pdf.title || '') + ' ' +
(pdf.description || '') + ' ' +
(pdf.category || '') + ' ' +
(pdf.author || '')
).toLowerCase();

// Optimization: Pre-calculate date values
let dateObj;
// Handle Firestore Timestamp or String
if (pdf.uploadDate && typeof pdf.uploadDate.toDate === 'function') {
dateObj = pdf.uploadDate.toDate();
} else {
dateObj = new Date(pdf.uploadDate);
}

// Optimization: Cache formatted date string
pdf._formattedDate = dateObj.toLocaleDateString('en-US', {
year: 'numeric', month: 'short', day: 'numeric'
});

const timeDiff = now - dateObj;
pdf._isNew = timeDiff < (7 * 24 * 60 * 60 * 1000); // 7 days
});
}

async function syncClassSwitcher() {
const classSelect = document.getElementById('classSelect');
if (!classSelect) return;
Expand Down Expand Up @@ -451,6 +490,7 @@ async function loadPDFDatabase() {

if (shouldUseCache) {
pdfDatabase = cachedData;
prepareSearchIndex(pdfDatabase);
// --- FIX: CALL THIS TO POPULATE UI ---
syncClassSwitcher();
renderSemesterTabs();
Expand All @@ -474,6 +514,8 @@ async function loadPDFDatabase() {
data: pdfDatabase
}));

prepareSearchIndex(pdfDatabase);

// --- FIX: CALL THIS TO POPULATE UI ---
syncClassSwitcher();
renderPDFs();
Expand Down Expand Up @@ -656,7 +698,7 @@ function activateHoliday(overlay) {
7. EVENT LISTENERS
========================================= */
function setupEventListeners() {
searchInput.addEventListener('input', renderPDFs);
searchInput.addEventListener('input', debounce(renderPDFs, 300));

tabBtns.forEach(btn => {
btn.addEventListener('click', handleSemesterChange);
Expand Down Expand Up @@ -915,10 +957,14 @@ function renderPDFs() {
matchesCategory = currentCategory === 'all' || pdf.category === currentCategory;
}

const matchesSearch = pdf.title.toLowerCase().includes(searchTerm) ||
// Optimization: Use pre-calculated search string
const matchesSearch = pdf._searchStr ? pdf._searchStr.includes(searchTerm) : (
// Fallback for safety
pdf.title.toLowerCase().includes(searchTerm) ||
pdf.description.toLowerCase().includes(searchTerm) ||
pdf.category.toLowerCase().includes(searchTerm) ||
pdf.author.toLowerCase().includes(searchTerm);
pdf.author.toLowerCase().includes(searchTerm)
);

// Update return statement to include matchesClass
return matchesSemester && matchesClass && matchesCategory && matchesSearch;
Expand Down Expand Up @@ -991,9 +1037,8 @@ function createPDFCard(pdf, favoritesList, index = 0, highlightRegex = null) {
const heartIconClass = isFav ? 'fas' : 'far';
const btnActiveClass = isFav ? 'active' : '';

const uploadDateObj = new Date(pdf.uploadDate);
const timeDiff = new Date() - uploadDateObj;
const isNew = timeDiff < (7 * 24 * 60 * 60 * 1000); // 7 days
// Optimization: Use pre-calculated isNew flag
const isNew = pdf._isNew !== undefined ? pdf._isNew : (new Date() - new Date(pdf.uploadDate) < (7 * 24 * 60 * 60 * 1000));

const newBadgeHTML = isNew
? `<span style="background:var(--error-color); color:white; font-size:0.6rem; padding:2px 6px; border-radius:4px; margin-left:8px; vertical-align:middle;">NEW</span>`
Expand All @@ -1008,7 +1053,8 @@ function createPDFCard(pdf, favoritesList, index = 0, highlightRegex = null) {
const categoryIcon = categoryIcons[pdf.category] || 'fa-file-pdf';

// Formatting Date
const formattedDate = new Date(pdf.uploadDate).toLocaleDateString('en-US', {
// Optimization: Use pre-formatted date string
const formattedDate = pdf._formattedDate || new Date(pdf.uploadDate).toLocaleDateString('en-US', {
year: 'numeric', month: 'short', day: 'numeric'
});

Expand Down