for 2 hours, main goal is complete, software serve data with API graphql. example:

GET http://localhost:3000/graphql?query=query{books { title }}
result books list
GET http://localhost:3000/graphql?query=query{bookByIsbn(isbn:"3214-5698-7412") { title }}
result book data

Data storage MongoDB

• e2e test of api route with mocha and chai
• export resource to csv implementation example: use mongoexport to export to csv file then serve file by express with download method.
• Documentation with comment
• Use docker: i usually use docker-compose with docker mongo and pm2 docker for node app (with restart and log file).
• Think about data, data maybe need rework: authors can be store in array

Code kata in Node.js where you have to write a library of books and magazines.

A code kata is an exercise in programming which helps a programmer hone their skills through practice and repetition.

• Topic
• Frame conditions
• Tasks
• Procedure
• License

You have to implement an abstracted and simple library system.

1. You have exact 2 hours of time - no minute longer.

   If you reach this time limit stop your work immediately. It is one part of the kata to respect this time limit.

2. There are no restrictions on how to use the provided time. If you want to code the entire time, take a break or a cigaret - it’s up to you.

3. This is a real world situation. You are allowed to consult the Internet, use every library you want, call a friend ...

   BUT: You are not allowed to do pair programming. AND If you have already done this kata before to have a look at your previous implementation.

4. Develop your code based on Node.js language level 8.

5. Keep the following priorities in mind while you implementing - in the mentioned order:

   1. Clean Code
   2. Loose coupling

6. Given resources:

   Hint: There is a reason why there are so many books and authors in german with umlauts.

   • authors.csv: Contains authors with its email, firstName and lastName.
   • books.csv: Contains books with its title, description, one or more authors and an isbn.
   • magazines.csv: Contains magazines with its title, one or more authors, a publishedAt and an isbn.

7. Rating:

   • We'll mostly rate your code and see how you structure and think it.
   • Finishing the Kata in 2h, it's not the primary goal.

• Main tasks
• Optional tasks

Hint:

1. Your software should read all data from the given CSV files in a meaningful structure. For the given dataset is for test development/test, we'll run it with a larger dataset.

2. Create a GraphQL API that :

• List all books
• List all magazines
• Find a book by its isbn
• Magazine by its isbn
• List all authors
• Find all book by their by their authors

3. Implement the API on defined on point (2)

Hint: Optional means optional.

1. Use MongoDB to store and operate on data

2. Write useful Unit tests.

3. Add a route to add a book or a magazine to the data structure of your software

4. Add a route to export each resource to CSV

5. Add a docker to run your server

1. Get the code. (Git clone)

2. Open in your favorite IDE.

3. Start the kata.

4. Publish your code and give us the url.

npm run start

npm run lint
npm run test

See LICENSE file.