Wordpress pagination for bootstrap 4 - that works anywhere and doesn't suck

wordpress-pagination-boostrap-4

Original credit to renzramos/wordpress-bootstrap-4-pagination - however his only works with the main loop. Small modification.
Now you can use in main query or custom wp query.

```php
<?php

if (!function_exists('pagination_that_doesnt_suck')) {
    function pagination_that_doesnt_suck($query = 0)
    {

        if (!$query) {
            global $wp_query;
            $query = $wp_query;
        }

        if ($query->max_num_pages <= 1)
            return;

        $paged = get_query_var('paged') ? absint(get_query_var('paged')) : 1;
        $max   = intval($query->max_num_pages);

        if ($paged >= 1)
            $links[] = $paged;

        if ($paged >= 3) {
            $links[] = $paged - 1;
            $links[] = $paged - 2;
        }

        if (($paged + 2) <= $max) {
            $links[] = $paged + 2;
            $links[] = $paged + 1;
        }

        echo '<div class="pagination-container"><ul class="pagination">' . "\n";

        if (get_previous_posts_link())
            printf('<li class="page-item">%s</li>' . "\n", get_previous_posts_link());

        if (!in_array(1, $links)) {
            $class = 1 == $paged ? ' class="page-item active"' : ' class="page-item"';
            printf('<li%s><a class="page-link" href="%s">%s</a></li>' . "\n", $class, esc_url(get_pagenum_link(1)), '1');
            if (!in_array(2, $links))
                echo '<li>…</li>';
        }

        sort($links);
        foreach ((array) $links as $link) {
            $class = $paged == $link ? ' class="page-item active"' : ' class="page-item"';
            printf('<li%s><a class="page-link" href="%s">%s</a></li>' . "\n", $class, esc_url(get_pagenum_link($link)), $link);
        }

        if (!in_array($max, $links)) {
            if (!in_array($max - 1, $links))
                echo '<li>…</li>' . "\n";
            $class = $paged == $max ? ' class="page-item active"' : ' class="page-item"';
            printf('<li%s><a class="page-link" href="%s">%s</a></li>' . "\n", $class, esc_url(get_pagenum_link($max)), $max);
        }

        if (get_next_posts_link())
            printf('<li class="page-item">%s</li>' . "\n", get_next_posts_link());

        echo '</ul></div>' . "\n";
    }
}

add_filter('next_posts_link_attributes', 'fix_wp_pagination_link_attributes_bootstrap_4');
add_filter('previous_posts_link_attributes', 'fix_wp_pagination_link_attributes_bootstrap_4');

function fix_wp_pagination_link_attributes_bootstrap_4()
{
    return 'class="page-link"';
}

```