Add "Library & Books" project

Author: thecodeholic

Library & Books/AbstractLibrary.php

@@ -0,0 +1,68 @@
+<?php
+/**
+ * User: TheCodeholic
+ * Date: 4/8/2020
+ * Time: 8:53 AM
+ */
+
+/**
+ * Class AbstractLibrary
+ */
+abstract class AbstractLibrary
+{
+    /**
+     * @var Author[]
+     */
+    private $authors = [];
+
+     // TODO Generate getters and setters of properties
+
+    /**
+     * Method accepts the name of the author, creates instance of the Author class,
+     * adds the instance in $authors array and returns created instance
+     *
+     * @param string $authorName
+     * @return Author
+     */
+    abstract public function addAuthor(string $authorName): Author;
+
+    /**
+     * Method accepts author name and Book. Finds author in $authors array and adds book to this array.
+     * The method must set $book's $author property with the found author also.
+     * This method is equivalent of Author::addBook
+     *
+     * @param      $authorName
+     * @param Book $book
+     */
+    abstract public function addBookForAuthor($authorName, Book $book);
+
+    /**
+     * Method returns books for given author
+     *
+     * @param $authorName
+     */
+    abstract public function getBooksForAuthor($authorName);
+
+    /**
+     * Method searches for book and returns instance of Book
+     *
+     * @param string $bookName
+     * @return Book
+     */
+    abstract public function search(string $bookName): Book;
+
+    /**
+     * This method must print every author and for each author all its books in the following format
+     * AuthorName
+     * ----------------------
+     * BookName - price
+     * Book2Name - price
+     * ...
+     *
+     * AnotherAuthorName
+     * ----------------------
+     * AnotherBookName - price
+     * ...
+     */
+    abstract public function print();
+}

Library & Books/Author.php

@@ -0,0 +1,21 @@
+<?php
+
+
+class Author
+{
+    public string $name;
+    public $books = [];
+
+    // TODO Generate getters and setters of properties
+    // TODO Generate constructor for all attributes. $books argument of the constructor can be optional
+
+    /**
+     * @param string $title
+     * @param float  $price
+     * @return \Book
+     */
+    public function addBook(string $title, float $price): Book
+    {
+        // TODO Create instance of the book. Add into $books array and return it
+    }
+}

Library & Books/Book.php

@@ -0,0 +1,12 @@
+<?php
+
+
+class Book
+{
+    public string $title;
+    public float $price;
+    public Author $author;
+
+    // TODO Generate getters and setters of properties
+    // TODO Generate constructor for all attributes. $author argument of the constructor can be optional
+}

Library & Books/Library.php

@@ -0,0 +1,7 @@
+<?php
+require_once "AbstractLibrary.php";
+
+class Library extends AbstractLibrary
+{
+    // TODO Implement all the methods declared in AbstractLibrary class
+}

Library & Books/index.php

@@ -0,0 +1,32 @@
+<?php
+
+require_once "Book.php";
+require_once "Library.php";
+
+$library = new Library();
+$author = $library->addAuthor('Jack London');
+$author->addBook("Martin Eden", 55);
+$author->addBook("The Game", 35);
+$library->addBookForAuthor('Jack London', new Book("A Son of the Sun", 25));
+
+$author2 = $library->addAuthor('Mark Twain');
+$author2->addBook('The Adventures of Tom Sawyer', 65);
+$author2->addBook('Luck', 12);
+
+$book = $library->search('Martin Eden'); // This must return instance of the book
+$author = $book->getAuthor(); // This must return instance of the Author class
+echo $author->getName(); // This must print "Jack London"
+
+$library->print();
+/*
+Jack London
+--------------------
+Martin Eden - 55
+The Game - 35
+A Son of the Sun - 25
+
+Mark Twain
+--------------------
+The Adventures of Tom Sawyer - 65
+Luck - 12
+*/