Implemented a simple CRUD api for work with users using in-memory database underneath.

• TypeScript
• nodemon
• dotenv
• cross-env
• ts-node
• eslint
• uuid
• jest
• supertest
• node.js version: 16 LTS

• Download project files (project located in crud-api branch)
• Go to project root directory
• Run npm i

• npm run start:dev -> The application is run in development mode using nodemon
• npm run start:prod -> The application is run in production mode (runs the build process and then runs the bundled file)
• npm run start:multi -> Runs multiple instances of application using the Node.js Cluster API (equal to the number of logical processor cores on the host machine) with a load balancer that distributes requests across them
• npm run lint -> identify errors found in the code, and generate reports about them.
• npm run lintfix -> it detects errors found in the code and tries to fix them.
• npm run test -> launches the test runner in the interactive watch mode.

Implemented endpoint api/users:

• GET api/users is used to get all persons
  • Server should answer with status code 200 and all users records
• GET api/users/${userId}
  • Server should answer with status code 200 and and record with id === userId if it exists
  • Server should answer with status code 400 and corresponding message if userId is invalid (not uuid)
  • Server should answer with status code 404 and corresponding message if record with id === userId doesn't exist
• POST api/users is used to create record about new user and store it in database
  • Server should answer with status code 201 and newly created record
  • Server should answer with status code 400 and corresponding message if request body does not contain required fields
• PUT api/users/${userId} is used to update existing user
  • Server should answer with status code 200 and updated record
  • Server should answer with status code 400 and corresponding message if userId is invalid (not uuid)
  • Server should answer with status code 404 and corresponding message if record with id === userId doesn't exist
• DELETE api/users/${userId} is used to delete existing user from database
  • Server should answer with status code 204 if the record is found and deleted
  • Server should answer with status code 400 and corresponding message if userId is invalid (not uuid)
  • Server should answer with status code 404 and corresponding message if record with id === userId doesn't exist

Denis Karazan