<?php

//copyright Lawrence Truett and FluffyCat.com 2005, all rights reserved

  include_once('Book.php');

  class BookList {
	
    private $books = array();
	private $bookCount = 0;

    public function __construct() {
    }

    public function getBookCount() {
      return $this->bookCount;
    }

    private function setBookCount($newCount) {
      $this->bookCount = $newCount;
    }

    public function getBook($bookNumberToGet) {
	  if ( (is_numeric($bookNumberToGet)) && 
           ($bookNumberToGet <= $this->getBookCount())) {
           return $this->books[$bookNumberToGet];
         } else {
           return NULL;
         }
	}

    public function addBook(Book $book_in) {
      $this->setBookCount($this->getBookCount() + 1);
      $this->books[$this->getBookCount()] = $book_in;
      return $this->getBookCount();
    }

    public function removeBook(Book $book_in) {
      $counter = 0;
      while (++$counter <= $this->getBookCount()) {
        if ($book_in->getAuthorAndTitle() == 
          $this->books[$counter]->getAuthorAndTitle())
		  {
            for ($x = $counter; $x < $this->getBookCount(); $x++) {
              $this->books[$x] = $this->books[$x + 1];
          }
          $this->setBookCount($this->getBookCount() - 1);
        }
      }
      return $this->getBookCount();
    }

  }
?>