Case statement stock balance

Basic task

The basic task consists of writing a console application to manage inventory balances.

The user interface must contain three functions:

• To sell x number. This is done by typing S and then the number + enter, e.g. "S5".

• To submit x number. This is done by typing I and then the number + enter, e.g. "I5".

• Show current stock. This is done by typing "L" + enter.

When a sale or delivery is made, the number of stock must be counted down or up by the specified number. When the program starts, the number is always 0 and data does not need to be stored in any other way than in the primary memory.

Remember to structure the code so that the presentation is separated from the calculation logic. The logic can be reused e.g. in a web application.

Addition

• Write an alternative algorithm that makes automatic delivery of the double number at sale. That is, if you sell 5, 10 are automatically delivered.

• Implement a mechanism for switching between the algorithm in the previous point and the original version.

• Add more than one product and handle product numbers at sales and delivery.

• Add the possibility to sell item packages that are predefined in the code, eg "SP1" means "sell 1 of package 1" where package 1 can contain one or more products (and then all must be counted down in stock at sale).

• Add item prices and show total amounts at sale.

• Add discounts, e.g. buy three and get one for free.

• Create unit tests for calculation logic.

install

npx stock-balance

TODO

• [x] create a repo

• [x] publish to npm

• [x] Choose a library to use for user interaction

• [x] create Product class

• [x] separate Logic folder containing the logic that could be shared with a frontend framework and the CLI interface

• [x] CLI will ask questions

  • [x] when You enter the programme will show a welcome screen with commands available then
  • [x] question there is no products in your store yet, would you like to add one now ? Y/N [x] if No show the commands available. [x] Yes -> start the create new product obj process [x] what is your product name ? -> string [x] what is the count ? -> number [x] what category example "cloth" "electric" ? -> string [x] what is the price of this product in SEK? -> float

• [x] Add item prices and show total amounts at sale.

• [x] Create unit tests for computational logic.

• [] Add discounts, e.g. buy three and get one for free.

• [] Write an alternative algorithm that makes automatic delivery of the double number at sale. That is, if you sell 5, 10 are automatically delivered.

• [] Implement a mechanism to switch between the algorithm in the previous point and the original version.

• [x] Add more than one product and handle product numbers at sales and delivery.

• [] Add the option to sell item packages that are predefined in the code, eg "SP1" means "sell 1 of package 1" where package 1 can contain one or more products (and then all must be counted down in stock at sale).

• [x] Add item prices and show total amounts at sale.

• [x] Add discounts, e.g. buy three and get one for free.

• [-] Create unit tests for computational logic.