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<?php
/**
* Braintree ResourceCollection
* ResourceCollection is a container object for result data
*
* stores and retrieves search results and aggregate data
*
* example:
* <code>
* $result = Braintree_Customer::all();
*
* foreach($result as $transaction) {
* print_r($transaction->id);
* }
* </code>
*
* @package Braintree
* @subpackage Utility
* @copyright 2014 Braintree, a division of PayPal, Inc.
*/
class Braintree_ResourceCollection implements Iterator
{
private $_index;
private $_batchIndex;
private $_items;
private $_pageSize;
private $_pager;
/**
* set up the resource collection
*
* expects an array of attributes with literal keys
*
* @param array $attributes
* @param array $pagerAttribs
*/
public function __construct($response, $pager)
{
$this->_pageSize = $response["searchResults"]["pageSize"];
$this->_ids = $response["searchResults"]["ids"];
$this->_pager = $pager;
}
/**
* returns the current item when iterating with foreach
*/
public function current()
{
return $this->_items[$this->_index];
}
/**
* returns the first item in the collection
*
* @return mixed
*/
public function firstItem()
{
$ids = $this->_ids;
$page = $this->_getPage(array($ids[0]));
return $page[0];
}
public function key()
{
return null;
}
/**
* advances to the next item in the collection when iterating with foreach
*/
public function next()
{
++$this->_index;
}
/**
* rewinds the testIterateOverResults collection to the first item when iterating with foreach
*/
public function rewind()
{
$this->_batchIndex = 0;
$this->_getNextPage();
}
/**
* returns whether the current item is valid when iterating with foreach
*/
public function valid()
{
if ($this->_index == count($this->_items) && $this->_batchIndex < count($this->_ids)) {
$this->_getNextPage();
}
if ($this->_index < count($this->_items)) {
return true;
} else {
return false;
}
}
public function maximumCount()
{
return count($this->_ids);
}
private function _getNextPage()
{
if (empty($this->_ids))
{
$this->_items = array();
}
else
{
$this->_items = $this->_getPage(array_slice($this->_ids, $this->_batchIndex, $this->_pageSize));
$this->_batchIndex += $this->_pageSize;
$this->_index = 0;
}
}
/**
* requests the next page of results for the collection
*
* @return none
*/
private function _getPage($ids)
{
$object = $this->_pager['object'];
$method = $this->_pager['method'];
$methodArgs = array();
foreach ($this->_pager['methodArgs'] as $arg) {
array_push($methodArgs, $arg);
}
array_push($methodArgs, $ids);
return call_user_func_array(
array($object, $method),
$methodArgs
);
}
}