Source: jsdoc.js

// User Data Access Component
class UserDataAccess {
    constructor() {
      this.users = [];
    }
  
    /**
     * Adds a new user to the data store.
     * @param {Object} user - The user object to be added.
     * @param {string} user.id - The unique identifier for the user.
     * @param {string} user.name - The name of the user.
     * @param {string} user.email - The email of the user.
     */
    addUser(user) {
      this.users.push(user);
    }
  
    /**
     * Retrieves a user by their unique identifier.
     * @param {string} userId - The unique identifier for the user.
     * @returns {Object|null} The user object if found, or null if not found.
     */
    getUserById(userId) {
      return this.users.find((user) => user.id === userId) || null;
    }
  
    /**
     * Deletes a user by their unique identifier.
     * @param {string} userId - The unique identifier for the user.
     * @returns {boolean} True if the user was deleted, or false if not found.
     */
    deleteUserById(userId) {
      const index = this.users.findIndex((user) => user.id === userId);
      if (index !== -1) {
        this.users.splice(index, 1);
        return true;
      }
      return false;
    }
  }
  
  // Example usage
  const userDataAccess = new UserDataAccess();
  userDataAccess.addUser({ id: '1', name: 'John Doe', email: 'john.doe@example.com' });
  console.log(userDataAccess.getUserById('1'));
  userDataAccess.deleteUserById('1');
  console.log(userDataAccess.getUserById('1'));