Calcufy Backend:

Implement a Web platform to provide a simple calculator functionality (addition, subtraction, multiplication, division, square root, and a random string generation) where each functionality will have a separate cost per request.

User’s will have a starting credit / balance. Each request will be deducted from the user’s balance. If the user’s balance isn’t enough to cover the request cost, the request shall be denied.

This Web application and its UI application should be live (on any platform of your choice) and should be ready to be configured and used locally for any other developer (having all instructions written for this purpose).

Calcufy:

Project Link

Backend Repo Frontend Repo

Requirements:

• Use third party operation for random string https://www.random.org/clients
• All client-server interaction should be through RESTful API (versionated).
• Collection endpoints should be able to provide filters and pagination.
• Use a Bootstrap or Material Design library (CSS/Design Library) of your choice.
• Add automated tests such as Unit Test (whether for frontend or backend).
• Records should be soft-deleted only.

🛠 With:

• Node.js
• Prisma
• JWT
• BCrypt
• AWS CloudFormation
• Lambda
• RDS

Installation

1. Be sure to follow this guide first: Prisma Docs

2. Clone the project

  git clone https://github.com/NotoriousGOR/calcufy-backend

3. Go to the project directory

  cd my-project

4. Install dependencies

  npm install

Deployment

To deploy this project run

  npm run deploy

API Reference

Create new account

  POST /sign-up

Parameter	Type	Description
username	string	Required
password	string	Required

Login (Requires Authorization Header)

  POST /login

Parameter	Type	Description
username	string	Required
password	string	Required

Perform operations (Requires Authorization Header)

  POST /operations

Parameter	Type	Description
operandA	string	Required (not on random_string, or square_root)
operandB	string	Required (not on random_string, or square_root)
op	string	Required (addition, subtraction, multiplication, division, square_root, random_string)

Get performed operations (Requires Authorization Header)

  POST /records