/**
* @return ArrayCollection|null
*/
public function getIterator()
{
if (!$this->list instanceof ArrayCollection) {
$this->list = new ArrayCollection();
if ($this->getTotal() <= 1) {
return $this->list;
}
// definition of offset to the left and to the right of the selected page
$left_offset = floor(($this->config->getMaxNavigate() - 1) / 2);
$right_offset = ceil(($this->config->getMaxNavigate() - 1) / 2);
// adjustment, if the offset is too large left
if ($this->config->getCurrentPage() - $left_offset < 1) {
$offset = abs($this->config->getCurrentPage() - 1 - $left_offset);
$left_offset = $left_offset - $offset;
$right_offset = $right_offset + $offset;
}
// adjustment, if the offset is too large right
if ($this->config->getCurrentPage() + $right_offset > $this->getTotal()) {
$offset = abs($this->getTotal() - $this->config->getCurrentPage() - $right_offset);
$left_offset = $left_offset + $offset;
$right_offset = $right_offset - $offset;
}
// determining the first and last pages in paging based on the current page and offset
$page_from = $this->config->getCurrentPage() - $left_offset;
$page_to = $this->config->getCurrentPage() + $right_offset;
$page_from = $page_from > 1 ? $page_from : 1;
// build list
for ($page = $page_from; $page <= $page_to; ++$page) {
if ($page == $this->config->getCurrentPage()) {
$this->list->add($this->getCurrent());
} else {
$this->list->add(new Node($page, $this->buildLink($page)));
}
}
}
return $this->list;
}
/**
* @dataProvider getConfigs
*
* @param int $total_pages
* @param int $current_page
*/
public function testConstruct($total_pages, $current_page)
{
$config = new Configuration($total_pages, $current_page);
$this->assertEquals($total_pages, $config->getTotalPages());
$this->assertEquals($current_page, $config->getCurrentPage());
}
