express-myimdb-api

1. Initial steps to create api, which runs in node.

2. npm init -y creates package.json

3. download express frameword npm i express

4. echo node_modules >> .gitignore creates .gitignore files and write node_modules

5. create a application folder mkdir app with index.js file.

6. Install the Dev dependencies npm i -D nodemon

   • npm i morgan joi dotenv uuid install the dependencies.
   • morgan prints the http log in the terminal
   • joi used to validate the user data given to the api.
   • dotenv used to maintain the secret files that should not pushed to the git repo, confidential datas.
   • uuid used to create unique id.
   • change the script in package.json to "start": "node app" and "dev": "nodemon"

7. creating port in .env .env is created in the main folder and it must be included in the .gitignore file.

1. get/books

• get the array of objects with id, title and isbn.

2. post/books

• adding movie with title and isbn with validaton for isbn-10
• error handler for the next(arg)

3. post /books/:bookid/rating

add rating within the range 0 to 5 only add rating, if it is not entered.

const rating = [
    {
        rateId,
        rating,
        bookId,
    }
]

4. GET /books/:bookid

find the rating provided for the book, then display the single book with rating.

output of the single book
{
    "id": 1234,
    "title": "Storywallah",
    "isbn": "0143445774",
    "ratings": 5
}

by default rating should be 0.

5. PUT /books/:bookid

{ title: '' } no isbn should be passed

6. DEL /books/:bookid

deleting the book with id

7. PUT /books/:bookid/rating

{ rating: 0 and 5, }

//updating single book with rating
const updateRating = ({ bookId, rating }) => {
  const idx = books.findIndex((b)=> b.id == bookId);
  if(idx == -1){
    return null;
  }
  
  rating && (ratings[idx]['rating'] = rating);
  return rating[idx];
};

if rating is not found for a book, return error saying so

8. GET /rating/:ratingid

{ id: 100, rating: 3, book: { id: 216, title: '', isbn: '', } }

9. DEL /rating/:ratingid