MapDataProvider.php

<?php
/**
 * @author Alexey Samoylov <alexey.samoylov@gmail.com>
 */
namespace common\components;

use yii\data\DataProviderInterface;

class MapDataProvider implements DataProviderInterface
{
    /** @var DataProviderInterface */
    protected $next;

    /** @var callable */
    protected $callback;

    public function __construct(DataProviderInterface $provider, callable $callback)
    {
        $this->next = $provider;
        $this->callback = $callback;
    }

    public function getCount()
    {
        return $this->next->getCount();
    }

    public function getKeys()
    {
        return $this->next->getKeys();
    }

    public function getPagination()
    {
        return $this->next->getPagination();
    }

    public function getSort()
    {
        return $this->next->getSort();
    }

    public function getTotalCount()
    {
        return $this->next->getTotalCount();
    }

    public function prepare($forcePrepare = false)
    {
        return $this->next->prepare($forcePrepare);
    }

    public function getModels()
    {
        $models = $this->next->getModels();
        return call_user_func($this->callback, $models);
    }
}