First Commit - Portfolio Page

src/utils/rateLimiting.ts

@@ -0,0 +1,55 @@
+interface RateLimitEntry {
+  count: number;
+  timestamp: number;
+}
+
+const WINDOW_SIZE_MS = 3600000; // 1 hour
+const MAX_REQUESTS = 5; // Maximum requests per hour
+
+class RateLimiter {
+  private cache: Map<string, RateLimitEntry>;
+
+  constructor() {
+    this.cache = new Map();
+  }
+
+  isRateLimited(ip: string): boolean {
+    const now = Date.now();
+    const entry = this.cache.get(ip);
+
+    if (!entry) {
+      this.cache.set(ip, { count: 1, timestamp: now });
+      return false;
+    }
+
+    if (now - entry.timestamp > WINDOW_SIZE_MS) {
+      this.cache.set(ip, { count: 1, timestamp: now });
+      return false;
+    }
+
+    if (entry.count >= MAX_REQUESTS) {
+      return true;
+    }
+
+    entry.count++;
+    return false;
+  }
+
+  getRemainingAttempts(ip: string): number {
+    const entry = this.cache.get(ip);
+    if (!entry) {
+      return MAX_REQUESTS;
+    }
+    return Math.max(0, MAX_REQUESTS - entry.count);
+  }
+
+  getTimeToReset(ip: string): number {
+    const entry = this.cache.get(ip);
+    if (!entry) {
+      return 0;
+    }
+    return Math.max(0, WINDOW_SIZE_MS - (Date.now() - entry.timestamp));
+  }
+}
+
+export const rateLimiter = new RateLimiter();