Asignación de libros a usuario: vista

How do we identify whether a user has a book or not?

In the context of a book management application, it is essential to be able to determine whether a user has a specific book. In the previous exercise, the goal was to modify the view to reflect whether a user already has a book or not. This information is crucial to customize the user's interaction with the platform, offering personalized options such as rating the book or removing it from their list.

To implement this functionality, we start from the view, where we will add a conditional that shows different options depending on the status of the book:

 {if (G\AppUserIdentity::hasBook($bookId)) { // Logic for when the user has the book} else { // Logic for when the user doesn't have the book}

This code snippet evaluates whether the user has registered the book as theirs and, based on that, deploys the corresponding actions.

How do we implement the hasBook function in the user model?

The hasBook function is key to determine the ownership of a book in the user model. It checks if the specific book is associated with the user by querying the database.

public function hasBook($bookId) { $userBooks = UserBook::where([ 'user_id' => $this->id, 'book_id' => $bookId ])->get();
 return !empty($userBooks);}

In this code:

• A query is performed on the UserBook table looking for user and book matches.
• The where method filters the records that match the user_id and book_id.
• If the resulting array is not empty, it means that the user owns the book, returning true. Otherwise, false is returned.

What do we do after identifying a book as owned?

Once it is confirmed that the user owns a book, two options are offered in the view: to rate the book or to indicate that the user no longer owns it. The rating is done via a form that sends the score to the BookScore driver.

Implementation of the rating form

As part of the future implementation, a form will be designed for users to rate their books. This form will send a rating from 1 to 5 to the BookScore controller, taking care of receiving it and processing it properly in the system.

<form action="/book-score" method="post"> <label for="rating">Ratethis book:</label> <select id="rating" name="rating"> <option value="1">1</option> <option value="2">2</option> <option value="3">3</option> <option value="4">4</option> <option value="5">5</option> </select> <button type="submit">Send</button></form>.

This implementation not only improves the user experience, allowing you to interact and give feedback on your books, but also creates a more dynamic system that can adapt to future functionality, such as book revaluation or rating data analysis.

Keep exploring and extending your knowledge to continue building robust, user-centric applications!