vendor/braintree/braintree_php/lib/Braintree/ResourceCollection.php

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<?php

namespace Braintree;

use Iterator;

/**
 * Braintree ResourceCollection
 * ResourceCollection is a container object for result data
 *
 * stores and retrieves search results and aggregate data
 *
 * example:
 * <code>
 * $result = Customer::all();
 *
 * foreach($result as $transaction) {
 *   print_r($transaction->id);
 * }
 * </code>
 */
class ResourceCollection implements Iterator
{
    private $_batchIndex;
    private $_ids;
    private $_index;
    private $_items;
    private $_pageSize;
    private $_pager;

    // phpcs:ignore PEAR.Commenting.FunctionComment.Missing
    public function __construct($response, $pager)
    {
        $this->_pageSize = $response["searchResults"]["pageSize"];
        $this->_ids = $response["searchResults"]["ids"];
        $this->_pager = $pager;
    }

    /**
     * returns the current item when iterating with foreachi
     *
     * @return object
     */
    #[\ReturnTypeWillChange]
    public function current()
    {
        return $this->_items[$this->_index];
    }

    /**
     * returns the first item in the collection
     *
     * @return mixed
     */
    public function firstItem()
    {
        $ids = $this->_ids;

        if (!isset($ids[0])) {
            return null;