<?php

/**
 * DomFramework
 * @package domframework
 * @author Dominique Fournier <dominique@fournier38.fr>
 * @license BSD
 */

namespace Domframework;

/**
 * This class manage one RSS Item
 *
 * Called by Rss
 */
class RssItem
{
    /**
     * The title of the item
     */
    private $title;

    /**
     * The URL of the item
     */
    private $link;

    /**
     * The item synopsis
     */
    private $description;

    /**
     * Email address of the author of the item
     */
    private $author;

    /**
     * URL of a page for comments relating to the item
     */
    private $comments;

    /**
     * A string that uniquely identifies the item
     */
    private $guid;

    /**
     * Indicates when the item was published
     */
    private $pubDate;

    /**
     * Get/Set the value
     * @param string|null $title The title to get/set
     */
    public function title($title = null)
    {
        if ($title === null) {
            return $this->title;
        }
        if (! is_string($title)) {
            throw new \Exception("Title provided to RSS Item is not a string", 500);
        }
        if ($title === "") {
            $title = null;
        }
        $this->title = $title;
        return $this;
    }

    /**
     * Get/Set the value
     * @param string|null $link The link to get/set
     */
    public function link($link = null)
    {
        if ($link === null) {
            return $this->link;
        }
        if (! is_string($link)) {
            throw new \Exception("Link provided to RSS Item is not a string", 500);
        }
        $verify = new Verify();
        if (! $verify->is_URL($link)) {
            throw new \Exception("Link provided to RSS Item is not an URL", 500);
        }
        if ($link === "") {
            $link = null;
        }
        $this->link = $link;
        return $this;
    }

    /**
     * Get/Set the value
     * @param string|null $description The description to get/set
     */
    public function description($description = null)
    {
        if ($description === null) {
            return $this->description;
        }
        if (! is_string($description)) {
            throw new \Exception(
                "Description provided to RSS Item is not a string",
                500
            );
        }
        if ($description === "") {
            $description = null;
        }
        $this->description = $description;
        return $this;
    }

    /**
     * Get/Set the value
     * @param string|null $author The author to get/set
     */
    public function author($author = null)
    {
        if ($author === null) {
            return $this->author;
        }
        if (! is_string($author)) {
            throw new \Exception("Author provided to RSS Item is not a string", 500);
        }
        if ($author === "") {
            $author = null;
        }
        $this->author = $author;
        return $this;
    }

    /**
     * Get/Set the value
     * @param string|null $comments The comments to get/set
     */
    public function comments($comments = null)
    {
        if ($comments === null) {
            return $this->comments;
        }
        if (! is_string($comments)) {
            throw new \Exception(
                "Comments provided to RSS Item is not a string",
                500
            );
        }
        if ($comments === "") {
            $comments = null;
        }
        $this->comments = $comments;
        return $this;
    }

    /**
     * Get/Set the value
     * @param string|null $guid The guid to get/set
     */
    public function guid($guid = null)
    {
        if ($guid === null) {
            return $this->guid;
        }
        if (! is_string($guid)) {
            throw new \Exception("GUID provided to RSS Item is not a string", 500);
        }
        if ($guid === "") {
            $guid = null;
        }
        $this->guid = $guid;
        return $this;
    }

    /**
     * Get/Set the value
     * @param string|null $pubDate The pubDate to get/set
     */
    public function pubDate($pubDate = null)
    {
        if ($pubDate === null) {
            return $this->pubDate;
        }
        if (! is_string($pubDate)) {
            throw new \Exception(
                "pubDate provided to RSS Item is not a string",
                500
            );
        }
        if (! Verify::staticIs_datetimeSQL($pubDate)) {
            throw new \Exception(
                "pubDate provided to RSS Item is not a valid date",
                500
            );
        }
        if ($pubDate === "") {
            $pubDate = null;
        } else {
            $pubDate = Convert::convertDate(
                $pubDate,
                "Y-m-d H:i:s",
                \DateTime::RFC2822
            );
        }
        $this->pubDate = $pubDate;
        return $this;
    }
}