// Proxy pattern example for controlling access to a sensitive object
// but taking advantage of JavaScript's Proxy class
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy

// Exact same class as before
class SensitiveObject {
  constructor(data) {
    this.data = data;
  }

  access() {
    console.log('Accessing sensitive object');
    return this.data;
  }
}

// Proxy handler for access control
const handler = {
  get(target, property) {
    if (property === 'data' && !this.checkAccess()) {
      console.log('Access denied');
      return undefined;
    }
    if (property === 'access') {
      if (this.checkAccess()) {
        return target[property].bind(target);
      } else {
        return () => console.log('Access denied');
      }
    }
    console.log(`Accessing property '${property}'`);
    return target[property];
  },
  checkAccess() {
    // Perform validation or checks here
    return false; // Simulating access denial for demonstration
  }
};

// Creating a proxy object
const sensitiveObject = new SensitiveObject('sensitive data');
const proxy = new Proxy(sensitiveObject, handler);

// Using the proxy object
console.log(proxy.data); // Access denied, undefined
proxy.access(); // Access denied

// Modifying the checkAccess method to grant access
handler.checkAccess = function() {
  return true; // Granting access for demonstration
};

console.log(proxy.data); // Accessing property 'data', Sensitive data
proxy.access(); // Accessing sensitive object