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phorge/externals/twilio-php/Services/Twilio/AutoPagingIterator.php
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AutoPagingIterator.php
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<?php
class Services_Twilio_AutoPagingIterator
implements Iterator
{
protected $generator;
protected $args;
protected $items;
private $_args;
public function __construct($generator, $page, $size, $filters) {
$this->generator = $generator;
$this->page = $page;
$this->size = $size;
$this->filters = $filters;
$this->items = array();
// Save a backup for rewind()
$this->_args = array(
'page' => $page,
'size' => $size,
'filters' => $filters,
);
}
public function current()
{
return current($this->items);
}
public function key()
{
return key($this->items);
}
/*
* Return the next item in the list, making another HTTP call to the next
* page of resources if necessary.
*/
public function next()
{
try {
$this->loadIfNecessary();
return next($this->items);
}
catch (Services_Twilio_RestException $e) {
// 20006 is an out of range paging error, everything else is valid
if ($e->getCode() != 20006) {
throw $e;
}
}
}
/*
* Restore everything to the way it was before we began paging. This gets
* called at the beginning of any foreach() loop
*/
public function rewind()
{
foreach ($this->_args as $arg => $val) {
$this->$arg = $val;
}
$this->items = array();
$this->next_page_uri = null;
}
public function count()
{
throw new BadMethodCallException('Not allowed');
}
public function valid()
{
try {
$this->loadIfNecessary();
return key($this->items) !== null;
}
catch (Services_Twilio_RestException $e) {
// 20006 is an out of range paging error, everything else is valid
if ($e->getCode() != 20006) {
throw $e;
}
}
return false;
}
/*
* Fill $this->items with a new page from the API, if necessary.
*/
protected function loadIfNecessary()
{
if (// Empty because it's the first time or last page was empty
empty($this->items)
// null key when the items list is iterated over completely
|| key($this->items) === null
) {
$page = call_user_func_array($this->generator, array(
$this->page,
$this->size,
$this->filters,
$this->next_page_uri,
));
$this->next_page_uri = $page->next_page_uri;
$this->items = $page->getItems();
$this->page = $this->page + 1;
}
}
}

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