Object Literal Lookup Example

user.object_literal_lookup.service.js

/**
 * This method will validate user's status
 * @param user user data
 */
function validateStatus(user) {
  let response = {};

  /*
   * Object Literal Lookup: User status check: return response as per user status
   */
  const statusLookup = {
    Active: () => {
      response = { message: "Login successful", user: user };
    },
    Inactive: () => {
      response = { message: "User is inactive", user: undefined };
    },
    Invited: () => {
      response = { message: "User is not activated yet", user: undefined };
    },
    Blocked: () => {
      response = { message: "User is blocked", user: undefined };
    },
    Default: () => {
      response = { message: "User with invalid status", user: undefined };
    },
  };

  user.status in statusLookup ? statusLookup[user.status]() : statusLookup.Default();

  /*
   * Return response
   */
  return response;
}

/**
 * This method will validate user's role
 * @param user user data
 */
function validateRole(user) {
  let response = {};

  /*
   * Object Literal Lookup: User role check: return response as per user role
   */
  const roleLookup = {
    Admin: () => {
      response = { message: "Full Access granted", user: user };
    },
    Teacher: () => {
      response = { message: "Limited Access granted", user: user };
    },
    Student: () => {
      response = { message: "Access denied", user: undefined };
    },
    Default: () => {
      response = { message: "User with invalid role", user: undefined };
    },
  };

  user.role in roleLookup ? roleLookup[user.role]() : roleLookup.Default();

  /*
   * Return response
   */
  return response;
}