personal_website/src/components/HumanVerification.tsx
2025-12-08 12:19:53 +00:00

264 lines
8.8 KiB
TypeScript

import { useState, useEffect, useRef } from 'react';
import { motion, AnimatePresence } from 'framer-motion';
const BYPASS_KEY = 'bypass-human-check';
const VERIFIED_KEY = 'human-verified';
interface HumanVerificationProps {
onVerified: () => void;
}
// Generate a simple math equation
const generateEquation = () => {
const operators = ['+', '-', '*'] as const;
const operator = operators[Math.floor(Math.random() * operators.length)];
let a: number, b: number, answer: number;
switch (operator) {
case '+':
a = Math.floor(Math.random() * 50) + 1;
b = Math.floor(Math.random() * 50) + 1;
answer = a + b;
break;
case '-':
a = Math.floor(Math.random() * 50) + 20;
b = Math.floor(Math.random() * (a - 1)) + 1;
answer = a - b;
break;
case '*':
a = Math.floor(Math.random() * 12) + 2;
b = Math.floor(Math.random() * 12) + 2;
answer = a * b;
break;
}
return { equation: `${a} ${operator} ${b}`, answer };
};
const HumanVerification = ({ onVerified }: HumanVerificationProps) => {
const [{ equation, answer }, setEquation] = useState(generateEquation);
const [userAnswer, setUserAnswer] = useState('');
const [error, setError] = useState(false);
const [attempts, setAttempts] = useState(0);
const canvasRef = useRef<HTMLCanvasElement>(null);
// Check for bypass in URL
useEffect(() => {
const params = new URLSearchParams(window.location.search);
if (params.has(BYPASS_KEY) || window.location.pathname.includes(BYPASS_KEY)) {
localStorage.setItem(VERIFIED_KEY, 'true');
onVerified();
}
}, [onVerified]);
// Draw equation on canvas for added security
useEffect(() => {
const canvas = canvasRef.current;
if (!canvas) return;
const ctx = canvas.getContext('2d');
if (!ctx) return;
// Get computed styles for theming
const computedStyle = getComputedStyle(document.documentElement);
const primaryColor = computedStyle.getPropertyValue('--primary').trim();
const hslMatch = primaryColor.match(/[\d.]+/g);
const primaryRGB = hslMatch
? `hsl(${hslMatch[0]}, ${hslMatch[1]}%, ${hslMatch[2]}%)`
: '#00ff00';
// Clear canvas
ctx.fillStyle = 'rgba(0, 0, 0, 0.8)';
ctx.fillRect(0, 0, canvas.width, canvas.height);
// Draw grid lines for terminal feel
ctx.strokeStyle = 'rgba(0, 255, 0, 0.1)';
ctx.lineWidth = 1;
for (let i = 0; i < canvas.width; i += 20) {
ctx.beginPath();
ctx.moveTo(i, 0);
ctx.lineTo(i, canvas.height);
ctx.stroke();
}
for (let i = 0; i < canvas.height; i += 20) {
ctx.beginPath();
ctx.moveTo(0, i);
ctx.lineTo(canvas.width, i);
ctx.stroke();
}
// Draw border
ctx.strokeStyle = primaryRGB;
ctx.lineWidth = 2;
ctx.strokeRect(2, 2, canvas.width - 4, canvas.height - 4);
// Draw equation with slight random positioning for anti-bot
const offsetX = Math.random() * 10 - 5;
const offsetY = Math.random() * 6 - 3;
ctx.font = 'bold 48px monospace';
ctx.fillStyle = primaryRGB;
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
// Add subtle noise/distortion
const chars = equation.split('');
let xPos = canvas.width / 2 - (chars.length * 15) + offsetX;
chars.forEach((char) => {
const yOffset = Math.random() * 4 - 2;
ctx.fillText(char, xPos, canvas.height / 2 + offsetY + yOffset);
xPos += 30;
});
// Draw "= ?" at the end
ctx.fillText('= ?', xPos + 20, canvas.height / 2 + offsetY);
// Add scanline effect
for (let y = 0; y < canvas.height; y += 3) {
ctx.fillStyle = 'rgba(0, 0, 0, 0.15)';
ctx.fillRect(0, y, canvas.width, 1);
}
}, [equation]);
const handleSubmit = (e: React.FormEvent) => {
e.preventDefault();
const parsed = parseInt(userAnswer, 10);
if (!isNaN(parsed) && parsed === answer) {
localStorage.setItem(VERIFIED_KEY, 'true');
onVerified();
} else {
setError(true);
setAttempts(prev => prev + 1);
setTimeout(() => {
setError(false);
// Generate new equation after 3 failed attempts
if (attempts >= 2) {
setEquation(generateEquation());
setAttempts(0);
}
}, 600);
setUserAnswer('');
}
};
const handleNewEquation = () => {
setEquation(generateEquation());
setUserAnswer('');
setError(false);
};
return (
<motion.div
initial={{ opacity: 0 }}
animate={{ opacity: 1 }}
className="fixed inset-0 z-[100] bg-background flex items-center justify-center p-4"
>
<div className="max-w-lg w-full">
<motion.div
initial={{ scale: 0.9, opacity: 0 }}
animate={{ scale: 1, opacity: 1 }}
transition={{ delay: 0.2 }}
className="border-2 border-primary box-glow p-6 bg-background"
>
{/* Header */}
<div className="text-center mb-6">
<pre className="font-mono text-[10px] sm:text-xs text-primary leading-tight mb-4">
{`┌─────────────────────────────────────┐
│ SECURITY VERIFICATION v2.0 │
│ ANTI-BOT PROTOCOL │
└─────────────────────────────────────┘`}
</pre>
<p className="font-mono text-sm text-foreground/70">
{'>'} Solve the equation to verify humanity
</p>
</div>
{/* Canvas with equation */}
<div className="mb-6 flex justify-center">
<canvas
ref={canvasRef}
width={320}
height={100}
className="border border-primary/30 rounded"
/>
</div>
{/* Input form */}
<form onSubmit={handleSubmit} className="space-y-4">
<div className="relative">
<span className="absolute left-3 top-1/2 -translate-y-1/2 text-primary font-mono">
{'>'}_
</span>
<input
type="text"
inputMode="numeric"
pattern="-?[0-9]*"
value={userAnswer}
onChange={(e) => setUserAnswer(e.target.value.replace(/[^0-9-]/g, ''))}
placeholder="Enter answer"
autoFocus
className={`w-full bg-background border-2 ${
error ? 'border-destructive animate-pulse' : 'border-primary/50'
} p-3 pl-12 font-mono text-lg text-foreground placeholder:text-foreground/30 focus:outline-none focus:border-primary transition-colors`}
/>
</div>
<AnimatePresence>
{error && (
<motion.div
initial={{ opacity: 0, y: -10 }}
animate={{ opacity: 1, y: 0 }}
exit={{ opacity: 0 }}
className="font-mono text-sm text-destructive flex items-center gap-2"
>
<span></span>
<span>INCORRECT - {3 - attempts} attempts remaining</span>
</motion.div>
)}
</AnimatePresence>
<div className="flex gap-3">
<button
type="submit"
disabled={!userAnswer}
className="flex-1 font-minecraft text-sm py-3 border-2 border-primary bg-primary/20 text-primary hover:bg-primary/40 disabled:opacity-50 disabled:cursor-not-allowed transition-all duration-300 box-glow"
>
[VERIFY]
</button>
<button
type="button"
onClick={handleNewEquation}
className="px-4 py-3 border-2 border-primary/50 text-primary/70 hover:border-primary hover:text-primary transition-all font-mono text-sm"
>
</button>
</div>
</form>
{/* Footer */}
<div className="mt-6 pt-4 border-t border-primary/20 space-y-2">
<div className="flex justify-between text-[10px] font-mono text-foreground/40">
<span>Protocol: MATH-VERIFY-2.0</span>
<span>Encryption: ACTIVE</span>
</div>
<p className="font-mono text-[10px] text-foreground/30 text-center">
// This verification helps protect against automated access
</p>
</div>
</motion.div>
{/* Terminal decoration */}
<div className="mt-4 font-mono text-[10px] text-primary/50 space-y-1">
<p>{'>'} Awaiting verification input...</p>
<p className="animate-pulse">{'>'} _</p>
</div>
</div>
</motion.div>
);
};
export default HumanVerification;
export { VERIFIED_KEY, BYPASS_KEY };