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Merged
ayomideadeniran merged 2 commits into from
Apr 27, 2026
Merged

feat: add offline access and performance optimization with PWA support #300

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2931bad
feat: add offline access and performance optimization with PWA support
MavDavis Apr 26, 2026
7ea2746
fix: resolve merge conflicts
Apr 27, 2026
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25 changes: 25 additions & 0 deletions frontend/public/icon-192x192.png
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109 changes: 109 additions & 0 deletions frontend/public/manifest.json
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{
"name": "Web3 Student Lab - Blockchain Education Platform",
"short_name": "Web3 Student Lab",
"description": "Learn blockchain development with hands-on experience using Soroban smart contracts and Stellar blockchain",
"start_url": "/",
"scope": "/",
"display": "standalone",
"orientation": "portrait-primary",
"theme_color": "#000000",
"background_color": "#000000",
"categories": ["education", "productivity"],
"screenshots": [
{
"src": "/screenshot-192x144.png",
"sizes": "192x144",
"type": "image/png",
"form_factor": "narrow"
},
{
"src": "/screenshot-512x384.png",
"sizes": "512x384",
"type": "image/png",
"form_factor": "wide"
}
],
"icons": [
{
"src": "/icon-192x192.png",
"sizes": "192x192",
"type": "image/png",
"purpose": "any"
},
{
"src": "/icon-512x512.png",
"sizes": "512x512",
"type": "image/png",
"purpose": "any"
},
{
"src": "/icon-maskable-192x192.png",
"sizes": "192x192",
"type": "image/png",
"purpose": "maskable"
},
{
"src": "/icon-maskable-512x512.png",
"sizes": "512x512",
"type": "image/png",
"purpose": "maskable"
}
],
"shortcuts": [
{
"name": "My Courses",
"short_name": "Courses",
"description": "View your enrolled courses",
"url": "/courses",
"icons": [
{
"src": "/icon-shortcut-courses-96x96.png",
"sizes": "96x96",
"type": "image/png"
}
]
},
{
"name": "Dashboard",
"short_name": "Dashboard",
"description": "View your learning dashboard",
"url": "/dashboard",
"icons": [
{
"src": "/icon-shortcut-dashboard-96x96.png",
"sizes": "96x96",
"type": "image/png"
}
]
},
{
"name": "Certificates",
"short_name": "Certificates",
"description": "View your certificates",
"url": "/certificates",
"icons": [
{
"src": "/icon-shortcut-certificates-96x96.png",
"sizes": "96x96",
"type": "image/png"
}
]
}
],
"share_target": {
"action": "/share",
"method": "POST",
"enctype": "multipart/form-data",
"params": {
"title": "title",
"text": "text",
"url": "url"
}
},
"protocol_handlers": [
{
"protocol": "web+stellar",
"url": "/verify?uri=%s"
}
]
}
227 changes: 227 additions & 0 deletions frontend/public/offline.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Web3 Student Lab - Offline</title>
<style>
:root {
--bg-dark: #000000;
--text-light: #ffffff;
--accent: #7C3AED;
--border: #2d2d2d;
}

* {
margin: 0;
padding: 0;
box-sizing: border-box;
}

body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
sans-serif;
background: var(--bg-dark);
color: var(--text-light);
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
padding: 20px;
}

.container {
max-width: 600px;
text-align: center;
animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
from {
opacity: 0;
transform: translateY(20px);
}
to {
opacity: 1;
transform: translateY(0);
}
}

.icon {
width: 80px;
height: 80px;
margin: 0 auto 30px;
background: linear-gradient(135deg, var(--accent), #A78BFA);
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
font-size: 40px;
}

h1 {
font-size: 32px;
margin-bottom: 15px;
background: linear-gradient(135deg, var(--accent), #A78BFA);
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;
background-clip: text;
}

p {
font-size: 16px;
color: #a0a0a0;
margin-bottom: 10px;
line-height: 1.6;
}

.cached-content {
background: #0a0a0a;
border: 1px solid var(--border);
border-radius: 8px;
padding: 20px;
margin: 30px 0;
text-align: left;
}

.cached-content h2 {
font-size: 14px;
color: var(--accent);
text-transform: uppercase;
letter-spacing: 1px;
margin-bottom: 15px;
}

.cached-content ul {
list-style: none;
}

.cached-content li {
padding: 8px 0;
color: #a0a0a0;
font-size: 14px;
display: flex;
align-items: center;
}

.cached-content li:before {
content: "✓";
color: var(--accent);
margin-right: 10px;
font-weight: bold;
}

.status {
margin-top: 30px;
padding: 15px;
background: rgba(124, 58, 237, 0.1);
border: 1px solid rgba(124, 58, 237, 0.3);
border-radius: 6px;
font-size: 14px;
}

.status.checking {
animation: pulse 1s infinite;
}

@keyframes pulse {
0%, 100% {
opacity: 1;
}
50% {
opacity: 0.7;
}
}

.retry-button {
margin-top: 20px;
padding: 12px 24px;
background: linear-gradient(135deg, var(--accent), #A78BFA);
color: white;
border: none;
border-radius: 6px;
font-size: 16px;
cursor: pointer;
transition: transform 0.2s, opacity 0.2s;
}

.retry-button:hover {
transform: translateY(-2px);
opacity: 0.9;
}

.retry-button:active {
transform: translateY(0);
}
</style>
</head>
<body>
<div class="container">
<div class="icon">📡</div>
<h1>You're Offline</h1>
<p>No internet connection detected. However, you can still access cached content from your previous visits.</p>

<div class="cached-content">
<h2>Available Offline</h2>
<ul>
<li>Previously visited courses</li>
<li>Learning materials</li>
<li>Certificates overview</li>
<li>Saved progress</li>
</ul>
</div>

<p>Core learning content will be available once your connection is restored.</p>

<div class="status checking">
<span id="status-text">Checking for connection...</span>
</div>

<button class="retry-button" onclick="location.reload()">
Try Again
</button>
</div>

<script>
// Monitor connection status
let isOnline = navigator.onLine;

window.addEventListener('online', () => {
isOnline = true;
updateStatus();
});

window.addEventListener('offline', () => {
isOnline = false;
updateStatus();
});

function updateStatus() {
const statusText = document.getElementById('status-text');
if (isOnline) {
statusText.textContent = '✓ Connection restored! You can navigate normally now.';
statusText.parentElement.classList.remove('checking');

// Automatically reload if back online
setTimeout(() => {
window.location.reload();
}, 2000);
} else {
statusText.textContent = 'Still offline. Waiting for connection...';
statusText.parentElement.classList.add('checking');
}
}

// Initial check
updateStatus();

// Periodic connection check every 5 seconds
setInterval(() => {
if (isOnline && navigator.onLine) {
updateStatus();
}
}, 5000);
</script>
</body>
</html>
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