learn-co-students/js-object-oriented-daily-lunch-gj-test-batch

Daily Lunch Lab

Objectives

• Build a domain model with class relations using JavaScript iterator methods
• Use JavaScript to write query methods on our classes to answer questions about data in the store

Instructions

In the following lab, we will be modeling a the models for The Daily Deli. The Daily Deli delivers daily lunches to different offices around US Cities. A customer orders a meal and it is delivered to the office of the customer's employer. So The Daily Deli relates a customer to a meal based on whether that meal was delivered to a customer. The employer of a customer is associated with the deliveries and meals ordered by its employees.

You will be modeling the following:

Customer class:

• new Customer() — initialized with both name, and an instance of an employer; returns a JavaScript object that has attributes of id, employerId, and name
• meals() - returns all of the meals that a customer has had delivered
• deliveries() — returns all of the deliveries that customer has received
• totalSpent() - returns the total amount that the customer has spent, as a function of the cost of the meals he has had delivered

Meal class:

• new Meal() — initialized with title and price; returns an object that has attributes oftitle, price, and id
• deliveries() - returns all of the deliveries that delivered the particular meal.
• customers() - returns all of the customers who have had the meal delivered.
• byPrice() - A class method that orders the meals by their price. Use the static keyword to write a class method.

Class methods are methods that are not called on an instance of the class, but on the class itself, for example Meal.byPrice() is a class method as it is called on the Meal class. You can write a class method simply by preceding a method on a class with JavaScript's static keyword. You can read more about class methods in JavaScript here.

Delivery class:

• new Delivery() — initialized with meal and customer; returns an object that has attributes of mealId, customerId, and id
• meal() - returns the meal associated with the delivery
• customer() - returns the customer associated with the delivery

Employer class:

• new Employer() — initialized with name; returns an object that has attributes of name and id
• employees() - returns a list of customers employed by the employer
• deliveries() - returns a list of deliveries ordered by the employer's employees
• meals() - returns a list of meals ordered by the employer's employees. The method is to not return the same meal multiple times.
• mealTotals() - returns a JavaScript object displaying each respective meal id ordered by the employer's employees. The keys of the JavaScript object are the meal ids and associated with each meal id is a value. For example, employerOne.mealTotals() returning an object of {1: 4, 2: 3} would mean that the meal with id of 1 was ordered by employerOne's employees four times, and the meal with id of 2 was ordered by employerOne's employees three times.