Sprint Challenge: Swift Fundamentals - Ice Cream Shop

You've been chosen to begin working on an app for Lambda School's first ice cream shop . The app will need to be able to create an ice cream shop model object, give it a menu of flavors, toppings and ice cream cone sizes and let people order from the menu.

This challenge allows you to practice the concepts and techniques learned over the past week and apply them in a concrete project. You will need to use your knowledge of classes, structs, enums and other Swift language features to accomplish these goals.

Instructions

Read these instructions carefully. Understand exactly what is expected before starting to code.

This is an individual assessment. All work must be your own. Your challenge score is a measure of your ability to work independently using the material covered through this sprint. You need to demonstrate proficiency in the concepts and objectives introduced and practiced in preceding days.

You are not allowed to collaborate during the Sprint Challenge. However, you are encouraged to follow the twenty-minute rule and seek support from your TLs if needed. Your TLs will be more vague than they normally would be. They can guide you a bit, but this is a time where work reflects your proficiency in iOS and your command of the concepts and techniques in this first unit, thus your help will be limited.

You have three hours to complete this challenge. Plan your time accordingly.

Commits

Commit your code regularly and meaningfully. This helps both you (in case you ever need to return to old code for any number of reasons) and your Team Lead.

Project Set Up

Please fork this repository and clone the fork to your machine to begin work. This repository contains a playground that you should write your code in.

Minimum Viable Product

In your solution, it is essential that you follow best practices and produce clean and professional results. Schedule time to review, refine, and assess your work and perform basic professional polishing including spell-checking and grammar-checking on your code. It is better to submit a challenge that meets the minimum requirements than one that attempts too much and does not work in the end.

Follow these steps to complete the Sprint Challenge. Recognize that not every step necessary to complete this challenge will be listed below. It can be useful to mentally break a step down by its individual sentences, or even smaller than that.

1. Create a struct called Flavor. Add the following properties. Think about what type they should be:

   • name
   • rating

2. Create an enum called Size.

   • Give it a case for small, medium, and large.
   • Make the enum have Double raw values. The raw value should represent the size's price. For example, small might be 3.99.

3. Create a struct called Cone.

   • Give the struct properties (constants) that hold a flavor, topping (as a String), and size.
   • Create a function called eat. It shouldn't have any arguments. It should print a string of text that includes the name of the cone's flavor. For example: "Mmm! I love !"

4. Create a class called IceCreamShop.

   • An ice cream shop needs a menu, so create variables that hold the various flavors, sizes, and toppings you want to have in your shop.
   • Create a variable called totalSales. This will be used to keep track of how much money was made.

5. If a customer asks which flavors are available, we need to be ready to tell them. To accomplis this, do the following:

   • Create a function called listTopFlavors.
   • This function doesn't need any arguments.
   • In the function, build a string that lists out the names of each flavor in the shop's flavors array whose rating is over 4.0. For example, the string might say "Our top flavors are ." Hint: You may want to loop through the array of flavors in order to access each one's name.
   • When the string has been created, print it.

6. Customers will need a way to order a cone.

   • Create a function called orderCone.
   • This should have arguments needed to initialize a Cone, such as a flavor, topping (if desired), and a size.
   • This function should return an optional Cone object. We're going to have it be optional for later use.
   • In this function, create a constant that initializes a new Cone with the arguments passed into the function.
   • Add the price of the cone to the totalSales variable you made in the previous step.
   • Create a string that tells the price of the cone, along with its flavor and topping. NOTE: account for the potential lack of a topping on the Cone in that string by using optional binding (if-let). For example, the string could say "Your mint ice cream with chocolate chips is 3.99", or "Your vanilla ice cream is 5.99." Print the string.
   • Finally, return the cone you initialized.

7. At the bottom of the playground, create a few Flavor constants, an array of sizes, and an array of toppings.

8. Use the constants you just made to initialize a new IceCreamShop constant.

9. Call the shop's listTopFlavors function and make sure it runs correctly.

10. Create a new Cone constant. Use the shop's orderCone function to assign the constant a Cone value.

11. Using that new Cone constant, call its eat function without unwrapping the constant.

12. Print the shop's totalSales and make sure that it has increased since you ordered a cone in step 10.

Validate your work through running your playground and ensure that your code operates as designed.

Stretch Problems (Optional)

After finishing your required elements, you can push your work further. These goals may or may not be things you have learned in this module but they build on the material you just studied. Time allowing, stretch your limits and see if you can deliver on the following optional goals:

• Format the various strings to account for edge cases, such as if there are no flavors with a rating above 4.0, finishing the last flavor with "and". For example,", , and ", instead of just ", , "
• In the orderCone function, check to make sure the flavor that the person requested exists on the menu.