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feat: implement qr generation for classroom invite link #602

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Merged
knoxiboy merged 1 commit into from
Jun 13, 2026
Merged

feat: implement qr generation for classroom invite link #602

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17 changes: 17 additions & 0 deletions package-lock.json
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2 changes: 2 additions & 0 deletions package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,7 @@
"framer-motion": "^12.40.0",
"google-tts-api": "^0.0.6",
"groq-sdk": "1.1.1",
"html-to-image": "^1.11.13",
"inngest": "^4.4.0",
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"input-otp": "1.4.2",
"jspdf": "^4.2.1",
Expand All @@ -70,6 +71,7 @@
"next-themes": "0.4.6",
"pdf-parse": "2.4.5",
"pdf-parse-fork": "1.2.0",
"qrcode.react": "^4.2.0",
"react": "18.3.1",
"react-day-picker": "9.4.1",
"react-dom": "18.3.1",
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117 changes: 110 additions & 7 deletions src/app/rooms/[id]/page.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ import {
import { useEffect, useState } from "react";
import { useHotkeys } from "react-hotkeys-hook";
import { useAppUser } from "../../provider";
import { QRCodeCanvas } from "qrcode.react";
import {
Brain,
MessageSquare,
Expand Down Expand Up @@ -324,6 +325,21 @@ export default function ClassroomPage() {
}
};

const downloadQr = () => {
const canvas = document.getElementById(
"invite-qr"
) as HTMLCanvasElement;

if (!canvas) return;

const url = canvas.toDataURL("image/png");

const link = document.createElement("a");
link.href = url;
link.download = "classroom-invite-qr.png";
link.click();
};
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const copyInviteLink = async () => {
if (!inviteUrl) return;

Expand Down Expand Up @@ -1019,13 +1035,100 @@ export default function ClassroomPage() {
</button>
</div>

<div className="space-y-5">
{/* Current Invite Code */}
<div className="rounded-xl border border-slate-200 dark:border-zinc-800 bg-slate-50 dark:bg-zinc-900 p-4">
<p className="mb-2 text-[10px] font-bold uppercase tracking-wider text-slate-400 dark:text-zinc-500">
Current Invite Code
</p>
<code className="text-2xl font-black text-blue-600 dark:text-blue-400 tracking-wider">
<div className="space-y-4">
<div className="rounded-xl border border-blue-200 dark:border-blue-900/60 bg-blue-50 dark:bg-blue-950/20 p-4">
<div className="flex items-start gap-3">
<Sparkles className="mt-0.5 h-4 w-4 text-blue-600 dark:text-blue-400 shrink-0" />
<div className="space-y-1">
<h3 className="text-sm font-bold text-slate-900 dark:text-white">
Secure Invite Link
</h3>
<p className="text-xs font-medium leading-relaxed text-slate-600 dark:text-zinc-400">
This creates a non-guessable invite link that expires in 7
days. Students can use it to join this classroom directly.
</p>
</div>
</div>
</div>

<button
onClick={generateInviteLink}
disabled={isGeneratingInvite}
className="w-full flex items-center justify-center gap-2 px-4 py-3 bg-blue-600 hover:bg-blue-700 disabled:opacity-60 disabled:cursor-not-allowed text-white rounded-xl font-bold uppercase tracking-wider text-[11px] transition-all duration-300 shadow-md shadow-blue-600/10 active:scale-[0.98]"
aria-label="Generate secure invite link"
>
{isGeneratingInvite ? (
<>
<Loader2 className="w-4 h-4 animate-spin" /> Generating...
</>
) : (
<>
<Sparkles className="w-4 h-4" /> Generate Secure Invite Link
</>
)}
</button>

{inviteUrl && (
<div className="flex flex-col lg:flex-row gap-6 items-start">
{/* Left side */}
<div className="flex-1">
<div className="rounded-xl border border-slate-200 dark:border-zinc-800 bg-slate-50 dark:bg-zinc-900 p-4">
<p className="mb-2 text-[10px] font-bold uppercase tracking-wider text-slate-400 dark:text-zinc-500">
Invite link
</p>

<div className="flex gap-2">
<input
value={inviteUrl}
readOnly
className="min-w-0 flex-1 rounded-lg border border-slate-200 dark:border-zinc-800 bg-white dark:bg-zinc-950 px-3 py-2 text-xs"
/>
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<button
onClick={copyInviteLink}
className="flex items-center gap-2 px-4 py-2 bg-blue-600 text-white rounded-lg"
>
<Copy className="w-3.5 h-3.5" />
Copy
</button>
</div>
</div>

{inviteExpiresAt && (
<p className="mt-3 text-center text-[11px] font-semibold text-slate-500">
Expires on {new Date(inviteExpiresAt).toLocaleString()}
</p>
)}
</div>

{/* Right side */}
<div className="flex flex-col items-center gap-3 shrink-0">
<div className="bg-white p-3 rounded-xl">
<QRCodeCanvas
id="invite-qr"
value={inviteUrl}
size={180}
/>
</div>

<button
onClick={downloadQr}
className="px-4 py-2 bg-emerald-600 hover:bg-emerald-700 text-white rounded-lg"
>
Download QR
</button>
</div>
</div>
)}
</div>

<div className="border-t border-slate-200 dark:border-zinc-900 pt-5 space-y-3">
<p className="text-[10px] font-bold uppercase tracking-wider text-slate-400 dark:text-zinc-500">
Existing class code fallback
</p>

<div className="bg-slate-50 dark:bg-zinc-900 border border-slate-200 dark:border-zinc-800 rounded-xl p-4 flex items-center justify-between gap-4 relative group overflow-hidden shadow-inner">
<code className="text-3xl font-black text-blue-600 dark:text-blue-400 tracking-wider relative z-10">
{classroom?.inviteCode}
</code>
</div>
Expand Down
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