Butterfly

A simple app showing a list of orders and a detail view for each on tap. It's possible to add new locally saved order or item.

Preview

Usage

To run the app, it is simple

1. Download and extract the zip
2. Open the workspace with xcode
   • No need to run "pod install"
   • The pod diectory is tracked
3. cmd+Shift+K to clean then cmd+R to run

Requirement

• Swift 5.3
• iOS 11.0 and above

Design pattern

This app uses the classic Apple's MVC pattern.

Discussion

• The synchronization of the local data with the server occurs each time the app is launched. Also you can do it manually with the "Pull to refresh" feature in the home screen.

• I assumed that if any sub entity of Purchase Order has been updated the last update date of the order itself would be updated as well. That's how i detect if an order has been updated. Regarding the way the refresh data func has been coded this behavior can easily be changed to check each sub entity even if the order hasn't been updated.

• After adding a new order the list of the orders is reloaded from core data and the hole tableView is reloaded. This behavior could be easily be changed to only add the new order to the list. A choice has to be done between these two options regarding the performance vs security.

• A basic form validation has been integrated assuming the following

  • The Order number is composed only from digits
  • The Order number is unique
  • The Item product ID is composed only from digits

• The app is Dark Mode compatible

• The app is localized and supports both English and French.