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miguelexmiguelex
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#26 -php. Extra
Ejercicio extra sin SRP
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‎Roadmap/26 - SOLID SRP/php/miguelex.php

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Original file line numberDiff line numberDiff line change
@@ -78,4 +78,257 @@ public function saveUser(Users $users){
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// Extra
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class Library {
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private $books = [];
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private $users = [];
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private $loans = [];
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public function addBook ($title, $author, $copies){
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$this->books[] = ['title' => $title, 'author' => $author, 'copies' => $copies];
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}
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public function addUser ($name, $id, $email){
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$this->users[] = ['name' => $name, 'id' => $id, 'email' => $email];
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}
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public function loanBook($userId, $bookTitle) {
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foreach ($this->books as &$book) {
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if ($book['title'] === $bookTitle && $book['copies'] > 0) {
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$this->loans[] = [
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'userId' => $userId,
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'bookTitle' => $bookTitle,
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'date' => date('Y-m-d H:i:s')
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];
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$book['copies']--;
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return "El libro ha sido prestado.";
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}
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}
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return "El libro no está disponible.";
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}
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public function returnBook($userId, $bookTitle) {
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foreach ($this->loans as $key => $loan) {
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if ($loan['userId'] === $userId && $loan['bookTitle'] === $bookTitle) {
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unset($this->loans[$key]);
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foreach ($this->books as &$book) {
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if ($book['title'] === $bookTitle) {
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$book['copies']++;
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return "El libro ha sido devuelto.";
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}
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}
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}
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}
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return "No se encontró el préstamo.";
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}
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public function getBooks(){
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return $this->books;
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}
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public function getUsers(){
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return $this->users;
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}
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public function getLoans(){
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return $this->loans;
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}
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}
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$myLibrary = new Library();
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do {
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echo "\n\nVamos a mostrar un ejemplo de una clase que no cumple el SRP. En este caso es una clase que gestiona una biblioteca\n\n";
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echo "";
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echo "1. Añadir libro\n";
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echo "2. Añadir usuario\n";
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echo "3. Prestar libro\n";
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echo "4. Devolver libro\n";
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echo "5. Mostrar libros\n";
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echo "6. Mostrar usuarios\n";
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echo "7. Mostrar préstamos\n";
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echo "8. Salir\n";
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echo "";
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echo "Elija una opción: ";
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$option = readline();
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echo "";
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switch ($option) {
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case 1:
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echo "Título: ";
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$title = readline();
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echo "Autor: ";
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$author = readline();
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echo "Copias: ";
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$copies = readline();
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$myLibrary->addBook($title, $author, $copies);
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break;
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case 2:
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echo "Nombre: ";
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$name = readline();
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echo "ID: ";
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$id = readline();
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echo "Email: ";
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$email = readline();
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$myLibrary->addUser($name, $id, $email);
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break;
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case 3:
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echo "ID del usuario: ";
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$userId = readline();
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echo "Título del libro: ";
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$bookTitle = readline();
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echo $myLibrary->loanBook($userId, $bookTitle) . "\n";
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break;
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case 4:
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echo "ID del usuario: ";
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$userId = readline();
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echo "Título del libro: ";
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$bookTitle = readline();
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echo $myLibrary->returnBook($userId, $bookTitle) . "\n";
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break;
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case 5:
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print_r($myLibrary->getBooks());
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break;
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case 6:
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print_r($myLibrary->getUsers());
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break;
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case 7:
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print_r($myLibrary->getLoans());
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break;
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}
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} while (($option != 8));
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// Vamos ahora a refactorizar para aplicar el SRP. Ahora tnedremos una clase para los libros, otra para los autores y otra para los prestamos, asi como sus respectivos managers
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class Books {
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private $title;
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private $author;
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private $copies;
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public function __construct($title, $author, $copies){
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$this->title = $title;
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$this->author = $author;
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$this->copies = $copies;
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}
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public function getTitle(){
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return $this->title;
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}
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public function getAuthor(){
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return $this->author;
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}
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public function getCopies(){
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return $this->copies;
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}
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public function loanBook(){
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$this->copies--;
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}
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public function returnBook(){
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$this->copies++;
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}
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}
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class UsersLibrary {
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private $name;
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private $id;
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private $email;
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public function __construct($name, $id, $email){
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$this->name = $name;
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$this->id = $id;
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$this->email = $email;
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}
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public function getName(){
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return $this->name;
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}
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public function getId(){
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return $this->id;
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}
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public function getEmail(){
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return $this->email;
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}
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}
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class Loan {
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private $userId;
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private $bookTitle;
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private $date;
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public function __construct($userId, $bookTitle){
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$this->userId = $userId;
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$this->bookTitle = $bookTitle;
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$this->date = date('Y-m-d H:i:s');
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}
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public function getUserId(){
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return $this->userId;
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}
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public function getBookTitle(){
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return $this->bookTitle;
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}
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public function getDate(){
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return $this->date;
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}
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}
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class BookManager {
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private $books = [];
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public function addBook(Books $book){
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$this->books[] = $book;
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}
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public function getBooks(){
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return $this->books;
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}
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}
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class UserManager{
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private $users = [];
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public function addUser(UsersLibrary $user){
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$this->users[] = $user;
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}
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public function getUsers(){
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return $this->users;
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}
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}
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class LoanManager{
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private $loans = [];
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public function loanBook(UsersLibrary $user, Books $book){
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$book->loanBook();
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$this->loans[] = new Loan($user->getId(), $book->getTitle());
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}
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public function returnBook(UsersLibrary $user, Books $book){
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$book->returnBook();
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foreach ($this->loans as $key => $loan) {
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if ($loan->getUserId() === $user->getId() && $loan->getBookTitle() === $book->getTitle()) {
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unset($this->loans[$key]);
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}
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}
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}
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public function getLoans(){
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return $this->loans;
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}
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}
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$myBookManager = new BookManager();
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$myUserManager = new UserManager();
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$myLoanManager = new LoanManager();

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