This the restful web application made by java and springboot frameword where you can find second hand books for less price. Those who have books that doesn't need can sell them to our repositorykeeper and the book will be placed online for sell. All you need to do to use this site is creating an account and you can start using the service.
For running application head to the target folder and run ap-0.0.1-SNAPSHOT.jar that should run the program for you.
For adding book to repository addBook method is mapped to http://127.0.0.1/book/add that receives a post request
and saves the received book in database.
For finding a book in repository findBook method is mapped to the end point http://127.0.0.1/book/add witch receives
a get request with parameters ("name" and "type") of type String this method calls findBookByNameContaining or
findBookByNameContaining method of the interface BookRepository and fetch the data needed from the database and sends
it in a json array.
For charging account of a user chargeAccount method is mapped to the end point http://127.0.0.1/user/charge/{user_id}
which receives post request with the path variable parameter user_id and a parameter amount then this method calls
get the user by its id from database and calls chargeAccount method of it and sends the amount value as argument then
it saves the changes to the database by calling userRepository.save() method.
For doing this find method in BookController.java is called which is mapped to the end point
http://127.0.0.1/book/{book_id}/get-information and receives get request this method calls the bookRepository.findById()
method and returns the result if this book exists in the repository.
For adding book to basket userController.addToBasket method which is mapped to the end point http://127.0.0.1/user/add-book
and receives post requests this method receives two parameters (book_id and user_id) and adds the book to the user's
shopping basket and sets the book's inBasket field to false and saves changes to database.
The user can see what's in his shopping basket. The method viewHistory of userController which is mapped to the end point
http://127.0.0.1/user/history/{user_id} and receives user_id as path variable then finds the user from database and returns
its purchases as an Iterable in json array.
After that you have selected the books you want to buy you can purchase them. The method purchase of UserController class
is mapped to the end point http://127.0.0.1/user/purchase/{user_id} and it calls the method purchase of the user that
is specified with the id which subtracts the basketPrice from account balance and sets basketPrice to zero. And saves
changes to the database.