Code Sample

gistfile1.txt

// Decorator to cache function results
function Cache(duration: number) {
  const cache = new Map<string, { expiry: number, value: any }>();
  return function (target: any, propertyKey: string, descriptor: PropertyDescriptor) {
    const originalMethod = descriptor.value;
    descriptor.value = async function (...args: any[]) {
      const key = JSON.stringify(args);
      const cached = cache.get(key);
      if (cached && cached.expiry > Date.now()) {
        return cached.value;
      }
      const result = await originalMethod.apply(this, args);
      cache.set(key, { expiry: Date.now() + duration, value: result });
      return result;
    };
  };
}

class APIClient<T> {
  private baseUrl: string;

  constructor(baseUrl: string) {
    this.baseUrl = baseUrl;
  }

  @Cache(60000) // Cache for 1 minute
  async fetchResource(endpoint: string): Promise<T> {
    const response = await fetch(`${this.baseUrl}/${endpoint}`);
    if (response.ok) {
      return response.json();
    } else {
      throw new Error(`Failed to fetch ${endpoint}`);
    }
  }
}

// Usage
const client = new APIClient<{ name: string }>("https://api.example.com");
client.fetchResource("resource").then((data) => console.log(data));