ProductCatalog API

ProductCatalogService.GetPurchases() - returns enumerable catalogue of purchases. You can apply sorting and filtering to this catalogue using this methods:

• Purchases.AddFilterItem(item id) (Adds item id to list of shown items)
• Purchases.AddItemsFiltering() (Applies items filtering)
• Purchases.AddCustomFiltering(Func (Purchase, bool)) (Applies custom filtering with predicate)
• Purchases.SetItemOrder(item id, order) (Adds items sorting order)
• Purchases.SetSortingByItems(descending?) (Applies sorting by items in descending or ascending order)
• Purchases.SetSortingByName(descending?) (Applies sorting by name in descending or ascending order)
• Purchases.SetSortingByPrice(descending?) (Applies sorting by price in descending or ascending order)
• Purchases.SetCustomSorting(Func (Purchase, Key), descending?) (Applies custom sorting with key selector function in descending or ascending order) After sorting and filtering you can enumerate Purchases using foreach in example.

Task Overview

We need to come up with a new product catalog API that will be shared among many game projects. This new system is going to be used on a daily basis by other developers so it is expected to be extensible, flexible and maintainable.

Requirements

The product catalog should contain both products and bundles:

• 3 different items for now: Coins, Gems and Tickets.
• Product: has one item and its amount, name, short description, and price in USD.
• Bundle: has a name, short description and price in USD. It contains up to three different items and their respective amounts.
• The catalog will read a JSON file as the data source. This JSON file should be created and structured by you.

The product catalog must have runtime sorting and filtering mechanisms, such as:

• Sort by ascending or descending (e.g. price, name).
• Sort everything by item, in any order (e.g. Coins > Gems > Tickets or Tickets > Coins > Gems etc).
• Filtering products and bundles by item (e.g. only show products and bundles with Coins and/or Tickets).
• The catalog API should facilitate custom sorting and filtering for the products and bundles. Different game teams will have different needs.

A “demo” script & scene should be provided. This should demonstrate:

• How someone would integrate your catalog.
• API usage.
• Custom sorting & filtering.

Other requirements:

• The catalog must be functional at runtime.
• Provide a short document describing how to use the API.

Additional information

• Take as much time as you need to complete the test, but ideally, it should be finished and returned to us within 10 days.
• All code should be written from scratch.
• Placeholder UI elements (texts, images) everywhere are enough.
• Third-party libraries should be avoided, except for JSON handling (e.g. JSON .NET).
• Do not wire up the product catalog to UnityIAP. This is not part of the test.
• Do not implement actual inventory usage (i.e. keeping track of purchased items). This is not part of the test.
• Use C# code and Unity LTS 2020.3.30.

REVIEW

We will look at your code architecture, structure and overall project organisation.