Inventory Manager

Manages a typical inventory using a ledger. It's CLI-based toy app to solve the interview problem, not based on real-world models/use-cases.

Models

High level view of the models used:

User <- Customer
     <- Employee

Item <- SKU <- ProductGroup

Order -<> Items, User, Net, Gross 

Ledger -<> Order, Item, Credit, Debit, Balance

Usecases

• Replenish an item in Inventory
• Place an order by an User for a list of Items
• Summary of sales so far today
• Summary of inventory
• Discounts are at both user level(mock users created with different types of discount) and at item/SKU/Product Group levels

What can be better?

• More tests
• Handling concurrency better: how do you handle multiple checkouts happening at different registers?
• More realistic models and usecases. Eg. "Silly things" like taxes are not considered in this toy model
• Caching/faster retrieval for sales and inventory summary
• Better error handling

Installation

0. Install golang(version > 1.8.1) and set GOPATH. For eg. $HOME/gopath.
1. Clone this repo into a folder and add that folder to your GOPATH. Eg. export GOPATH=$HOME/gopath:$HOME/src/toy-store
2. cd toy-store/src and run go run main.go.

Tests

1. Run go test -cover ./...