ACF repeater field pagination

/* Template Loop */
<div class="albums grid">
    <?php
    // Get query var
    global $wp_rewrite;
    if ($wp_rewrite->using_permalinks()) {
        if( !empty( get_query_var('albums'))) {
            $page = get_query_var('albums');
        } else {
            $page = 1;
        }
    } else {
        if( !empty( $_GET['albums'] )) {
            $page = $_GET['albums'];
        } else {
            $page = 1;
        }
    }
    // Variables
    $i      = 0;
    $albumspp   = 9;
    $albums     = get_field('photo_album');
    $total      = count($albums);
    $pages      = ceil($total / $albumspp);
    $min        = (($page * $albumspp) - $albumspp) + 1;
    $max        = ($min + $albumspp) - 1;
    // Loop
    if( have_rows('photo_album')) { ?>
        <div class="row">
            <?php while(have_rows('photo_album')): the_row(); $i++;
                /* Ignore this row, if $i is lower than $min */
                if($i < $min) {continue; }
                /* Stop loop completely, if $i is higher than $max */
                if($i > $max) {break; }
                /* Close row after 3 albums and start new one */
                if($c == 4): $c = 0; ?>
                    </div>
                    <div class="row">
                <?php endif; ?>
                <article <?php post_class('photo-album col-xs-3'); ?>>
                    <?php
                    $album_title    = get_sub_field('photo_album_title');
                    $album_thumb    = get_sub_field('photo_album_thumb');
                    $album_gallery  = get_sub_field('photo_album_gallery');
                    ?>
                    <ul class="thumbnails">
                        <li class="cover">
                            <?php if ($album_thumb) {
                                $imgalt = $album_thumb['alt'];
                                $imgsrcsm = $album_thumb['sizes']['thumbnail'];
                                $imgsrcmd = $album_thumb['sizes']['medium'];
                                $imgsrclg = $album_thumb['sizes']['large'];
                                ?>
                                <div class="entry-image">
                                    <a rel="lightbox[<?php echo $album_title; ?>]" href="<?php echo $imgsrclg; ?>" title="<?php echo $album_title; ?>">
                                        <img src="<?php echo $imgsrcsm; ?>" alt="<?php echo $imgalt; ?>" />
                                    </a>
                                </div>
                            <?php } ?>
                            <div class="entry-title">
                                <a rel="lightbox[<?php echo $album_title; ?>]" href="<?php echo $album_thumb['sizes']['large']; ?>" title="<?php echo $album_title; ?>">
                                    <h5><?php echo $album_title; ?><i class="icon-arrow-right"></i></h5>
                                </a>
                            </div>
                        </li>
                        <!-- Hide the rest of the thumbnails -->
                        <?php if ($album_gallery) {
                            foreach ($album_gallery as $photo){ ?>
                                <li class="hide">
                                    <a rel="lightbox[<?php echo $album_title; ?>]" href="<?php echo $photo['sizes']['large']; ?>" title="<?php echo $album_title; ?>">
                                        <img src="<?php echo $photo['sizes']['thumbnail']; ?>" alt="<?php echo $photo['alt']; ?>" />
                                    </a>
                                </li>
                            <?php }
                        } ?>
                    </ul>
                </article>
            <?php $c++; // column count
        endwhile; ?>

    </div>
    <?php } else { ?>
        <p><?php _e('No photo albums found','mytextdomain'); ?></p>
    <?php } ?>

    <!-- Pagination -->
    <?php if ($pages > 1) {
        repeater_pagination($page, $pages, 3);
    } ?>
</div>

<?php
/* ==========================================================================
   ACF Repeater Field Pagination (in functions.php)
   ========================================================================== */
/**
 * Custom bootstrap pagination for custom ACF repeater field array
 */
function repeater_pagination($paged = 1, $pages = '', $range = 2) {
    $showitems = ($range * 2) + 1;
    if(1 != $pages) {
        echo "<ul class='pager'>";
        // Arrows left
        if ($paged > 1) echo "<li class='previous'><a href='".get_repeater_pagenum_link($paged - 1)."'><i class='icon-arrow-left'></i></a></li>";
        // Numbers
        for ($i=1; $i <= $pages; $i++) {
            if (1 != $pages &&( !($i >= $paged+$range+1 || $i <= $paged-$range-1) || $pages <= $showitems )) {
                echo ($paged == $i)? "<li class='active'><a href='".get_repeater_pagenum_link($i)."'>".$i."</a></li>":"<li><a href='".get_repeater_pagenum_link($i)."'>".$i."</a></li>";
            }
        }
        // Arrows right
        if ($paged < $pages) echo "<li class='next'><a href='".get_repeater_pagenum_link($paged + 1)."'><i class='icon-arrow-right'></i></a></li>";
        echo "</ul>\n";
    }
}

/**
 * Custom get_pagenum_link() function for custom paged links
 */
function get_repeater_pagenum_link($pagenum = 1) {
    global $wp_rewrite;
    $pagenum = (int) $pagenum;
    $pageslug = 'albums';
    $request = remove_query_arg('albums');

    $home_root = parse_url(home_url());
    $home_root = ( isset($home_root['path']) ) ? $home_root['path'] : '';
    $home_root = preg_quote( trailingslashit( $home_root ), '|' );
    $request = preg_replace('|^'. $home_root . '|', '', $request);
    $request = preg_replace('|^/+|', '', $request);

    // Normal Permalinks
    if ( !$wp_rewrite->using_permalinks() || is_admin() ) {
        $base = trailingslashit( get_bloginfo( 'url' ) );
        if ( $pagenum > 1 ) {
            $result = add_query_arg('albums', $pagenum, $base . $request);
        } else {
            $result = $base . $request;
        }
    // Pretty Permalinks
    } else {
        $qs_regex = '|\?.*?$|';
        preg_match( $qs_regex, $request, $qs_match );
        if ( !empty( $qs_match[0] ) ) {
            $query_string = $qs_match[0];
            $request = preg_replace( $qs_regex, '', $request );
        } else {
            $query_string = '';
        }
        $request = preg_replace( "|$pageslug/\d+/?$|", '', $request);
        $request = preg_replace( '|^index\.php|', '', $request);
        $request = ltrim($request, '/');
        $base = trailingslashit( get_bloginfo( 'url' ) );

        if ( $wp_rewrite->using_index_permalinks() && ( $pagenum > 1 || '' != $request ) )
            $base .= 'index.php/';

        if ( $pagenum > 1 ) {
            $request = ( ( !empty( $request ) ) ? trailingslashit( $request ) : $request ) . user_trailingslashit( $pageslug . "/" . $pagenum, 'paged' );
        }

        $result = $base . $request . $query_string;
    }
    $result = apply_filters('get_repeater_pagenum_link', $result);
    return $result;
}

/* ==========================================================================
   Rewrite Rules
   ========================================================================== */

/* Photo albums pagination parameter */
function add_albums_query_var(){
    global $wp;
    $wp->add_query_var('albums');
}
/* Use EP_PERMALINK | EP_PAGES for pages and posts both */
function albums_rewrite_endpoint(){
  add_rewrite_endpoint('albums', EP_PERMALINK | EP_PAGES);
}
add_filter('init', 'add_albums_query_var');
add_filter('init', 'albums_rewrite_endpoint');
?>