<?php

/**
 *
 * @author Tomáš Naibrt <tomas@naibrt.cz>
 */
abstract class BaseSaSitemap implements ArrayAccess
{
    private $items = array();
    private $url = null;
    private $title = null;
    private $priority = 0.8;
    private $changefreq = 'weekly';

    public function __construct($title, $url = null)
    {
        $this->url = $url;
        $this->title = $title;
    }

    public function getUrl()
    {
        return $this->url;
    }

    public function hasUrl()
    {
        return strlen($this->url) > 0;
    }

    public function getTitle()
    {
        return $this->title;
    }

    public function getItems()
    {
        return $this->items;
    }

    public function hasItems()
    {
        return count($this->items) > 0;
    }

    public function addItem(saSitemap $item)
    {
        $this->items[] = $item;
    }

    public function offsetExists($offset)
    {
        return array_key_exists($offset, $this->items);
    }

    public function offsetGet($offset)
    {
        return $this->items[$offset];
    }

    public function offsetSet($offset, $value)
    {
        $this->items[$offset] = $value;
    }

    public function offsetUnset($offset)
    {
        unset($this->items[$offset]);
    }

    public function getPriority()
    {
        return $this->priority;
    }

    public function setPriority($priority)
    {
        $this->priority = $priority;
    }

    public function getChangeFreq()
    {
        return $this->changefreq;
    }

    public function setChangeFreq($changefreq)
    {
        $this->changefreq = $changefreq;
    }
}