function process_request()
{
$page = isset($_GET['page']) ? intval($_GET['page']) : 1;
$order = isset($_GET['order']) ? $_GET['order'] : 'id';
if (!in_array($order, ['id', 'price'])) {
include 'templates/404.php';
return;
}
if ($page <= 0) {
include 'templates/404.php';
return;
}
$total_rows = pdb_get_total_rows();
$total_pages = ceil($total_rows / PAGINATION_ROWS_PER_PAGE);
if ($page > $total_pages) {
include 'templates/404.php';
return;
}
$rows = pagination_get_page($page - 1, $order);
if ($rows === false || $total_rows === false) {
include 'templates/error.php';
return;
}
$_VIEW['items'] = $rows;
$_VIEW['order'] = $order;
$_VIEW['page'] = $page;
$_VIEW['total_pages'] = $total_pages;
include 'templates/view_all.php';
}
function __pagination_find_block($mc_handler, $block_key_generator, $comparator)
{
$total_rows = pdb_get_total_rows();
$total_pages = ceil($total_rows / PAGINATION_ROWS_PER_PAGE);
$item_block_idx = floor($total_pages / PAGINATION_WARM_PAGES_STEP);
while ($item_block_idx >= 0) {
$block_data = memcache_get($mc_handler, $block_key_generator($item_block_idx));
if ($block_data == false) {
$item_block_idx--;
} else {
if ($comparator($block_data)) {
$item_block_idx--;
} else {
break;
}
}
}
if ($item_block_idx < 0) {
$item_block_idx = 0;
}
if ($block_data) {
return [$item_block_idx, $block_data];
}
return false;
}