Programmatic re-indexing index WordPress Algolia plugin

re-index-wordpress-plugin.php

<?php
$algolia = Algolia_Plugin::get_instance();
$index = $algolia->get_index('posts_product');
$total_pages = $index->get_re_index_max_num_pages();
if ( $total_pages === 0 ) {
    $index->re_index( 1 );
    return;
}

$page = 1;
do {
    $index->re_index( $page++ );
} while ( $page <= $total_pages );