<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Doctrine\Common\Collections\ArrayCollection;

/**
 * Book.
 *
 * @ORM\Table(name="book")
 * @ORM\Entity(repositoryClass="AppBundle\Repository\BookRepository")
 */
class Book
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="title", type="string", length=255)
     */
    private $title;

    /**
     * @var int
     *
     * @ORM\Column(name="pages", type="integer")
     */
    private $pages;

    /**
     * @var \DateTime
     *
     * @ORM\Column(name="publishedAt", type="date")
     */
    private $publishedAt;

    /**
     * @var \Doctrine\Common\Collections\Collection
     *
     * @ORM\ManyToMany(
     *     targetEntity="Category",
     *     cascade={"persist"}
     * )
     * @ORM\JoinTable(
     *     name="book_has_category",
     *     joinColumns={
     *         @ORM\JoinColumn(
     *             name="book_id",
     *             referencedColumnName="id"
     *         )
     *     },
     *     inverseJoinColumns={
     *         @ORM\JoinColumn(
     *             name="category_id",
     *             referencedColumnName="id",
     *             unique=true
     *         )
     *     }
     *  )
     */
    private $categories;

    /**
     * @var Author
     *
     * @ORM\ManyToOne(
     *     targetEntity="Author",
     *     inversedBy="books",
     *     cascade={"persist", "remove", "merge"}
     * )
     * @ORM\JoinColumn(
     *     name="author_id",
     *     referencedColumnName="id"
     * )
     */
    private $author;

    /**
     * Constructor.
     */
    public function __construct()
    {
        $this->categories = new \Doctrine\Common\Collections\ArrayCollection();
    }

    /**
     * Get id.
     *
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set title.
     *
     * @param string $title
     *
     * @return Book
     */
    public function setTitle($title)
    {
        $this->title = $title;

        return $this;
    }

    /**
     * Get title.
     *
     * @return string
     */
    public function getTitle()
    {
        return $this->title;
    }

    /**
     * Set pages.
     *
     * @param int $pages
     *
     * @return Book
     */
    public function setPages($pages)
    {
        $this->pages = $pages;

        return $this;
    }

    /**
     * Get pages.
     *
     * @return int
     */
    public function getPages()
    {
        return $this->pages;
    }

    /**
     * Set publishedAt.
     *
     * @param \DateTime $publishedAt
     *
     * @return Book
     */
    public function setPublishedAt($publishedAt)
    {
        $this->publishedAt = $publishedAt;

        return $this;
    }

    /**
     * Get publishedAt.
     *
     * @return \DateTime
     */
    public function getPublishedAt()
    {
        return $this->publishedAt;
    }

    /**
     * Add category
     *
     * @param \AppBundle\Entity\Category $category
     *
     * @return Book
     */
    public function addCategory(\AppBundle\Entity\Category $category)
    {
        $this->categories[] = $category;

        return $this;
    }

    /**
     * Remove category
     *
     * @param \AppBundle\Entity\Category $category
     */
    public function removeCategory(\AppBundle\Entity\Category $category)
    {
        $this->categories->removeElement($category);
    }

    /**
     * Get categories
     *
     * @return \Doctrine\Common\Collections\Collection
     */
    public function getCategories()
    {
        return $this->categories;
    }

    /**
     * Set author
     *
     * @param \AppBundle\Entity\Author $author
     *
     * @return Book
     */
    public function setAuthor(\AppBundle\Entity\Author $author = null)
    {
        $this->author = $author;

        return $this;
    }

    /**
     * Get author
     *
     * @return \AppBundle\Entity\Author
     */
    public function getAuthor()
    {
        return $this->author;
    }
}