presentablecollection.php

<?php

/**
* Presentable class
*
* This class is heavily based off of Machuga's Presenter bundle. https://github.com/machuga/laravel-presenter
*
* @author Shawn McCool <shawn@heybigname.com>
* @author Matthew Machuga
* @version 1.0
* @license MIT
*/
class PresentableCollection implements ArrayAccess, Iterator, Countable, Serializable
{
    protected $_position = 0;
    protected $container = array();

    public static function to_array($presenter, $collection) 
    {
        $instance = new static($presenter, $collection);

        return (array) $instance->container;
    }

    public static function make($presenter, $collection)
    {
        return static::to_array($presenter, $collection);
    }

    public function __construct($presenter, $collection)
    {
        $this->container = array_map(function($item) use ($presenter)
        {
            return new $presenter($item);
        }, $collection);
    }

    public function rewind()
    {
        $this->_position = 0;
    }

    public function current()
    {
        return $this->container[$this->_position];
    }

    public function key()
    {
        return $this->_position;
    }

    public function next()
    {
        ++$this->_position;
    }

    public function valid()
    {
        return isset($this->container[$this->_position]);
    }

    public function count()
    {
        return count($this->container);
    }

    public function offsetSet($offset, $value)
    {
        if(is_null($offset))
        {
            $this->container[] = $value;
        }
        else
        {
            $this->container[$offset] = $value;
        }
    }

    public function offsetExists($offset)
    {
        return isset($this->container[$offset]);
    }

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

    public function offsetGet($offset)
    {
        return isset($this->container[$offset]) ? $this->container[$offset] : null;
    }

    public function serialize()
    {
        return serialize($this->container);
    }

    public function unserialize($collection)
    {
        $this->container = unserialize($collection);
    }
}