hodaa/product-cart

Product Cart

This is CLI for a cart of products, accepts multiple products, combines offers, and displays a total detailed bill in different currencies (based on user selection).

Installation

• cp .env.example .env

• Put this in your .env

  • TAX=14
  • PRECISION=2
  • CURRENCY=USD
  • DEFAULT_CURRENCY=USD

• docker-compose up -d

From PHP image

• docker-compose exec php bash
  • composer install
  • php artisan key:generate

Usage

php artisan create: cart {currency} {items}

ex:

• php artisan create: cart USD jacket shoes jacket t-shirt
• php artisan create: cart EGP Pants

Architecture

• you can set these value-form .env to be the dynamic overall project

  • TAX=14
  • PRECISION=2 //number of PRECISION you want to view price
  • CURRENCY=USD // if the currency not given
  • DEFAULT_CURRENCY=USD

• If you want to add a new discount you can go to app/Enums/DiscountPlans and add the plan number that you will insert in Offer table when inserting the item and then got to app\strategies\DiscountPlans and implement your new plan.

• if you want to add a new section to the bill like service just go to app/composite/ and your new class and implement interface bill

Design Pattern Used

1- Static Factory pattern to convert plan Number from DB to the according class should be implemented

2- Strategy pattern that I can dynamically implement any discount plan according to plan number from DB

3- Composite pattern to composite bill sections dynamically

3- service pattern I added all business logic in separate classes each class contains only one responsibility.

Performance

1- I chose to add all currencies and all Opposite symbols in a file in the config you can find it config/currencies as reading from a file will be better than reading from third-party or even DB,Because these currencies rarely changed.

2- I Put an index on name column as this will make the query faster.

Testing

From PHP image

• docker-compose exec php bash

Run

vendor/phpunit/bin

Tools

• PHP7.4
• Laravel
• Docker
• phpunit
• mysql 8