<?php

namespace Gitter\Util;

class Collection implements \ArrayAccess, \IteratorAggregate, \Countable
{
    /**
     * @var array
     */
    protected $items = array();

    /**
     * @return array
     */
    public function getItems()
    {
        return $this->items;
    }

    /**
     * @param array $items
     */
    public function setItems($items)
    {
        $this->items = $items;
    }

    /**
     * {@inheritdoc}
     */
    public function offsetExists($offset)
    {
        return isset($this->items[$offset]);
    }

    /**
     * {@inheritdoc}
     */
    public function offsetGet($offset)
    {
        return isset($this->items[$offset]);
    }

    /**
     * {@inheritdoc}
     */
    public function offsetSet($offset, $value)
    {
        if (is_null($offset)) {
            $this->items[] = $value;
        } else {
            $this->items[$offset] = $value;
        }
    }

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

    /**
     * {@inheritdoc}
     */
    public function getIterator()
    {
        return new \ArrayIterator($this->items);
    }

    /**
     * {@inheritdoc}
     */
    public function count()
    {
        return count($this->items);
    }
}