function mtphr_gallery_add_directional_nav($post_id, $meta_data)
{
    $settings = mtphr_galleries_settings();
    // Extract the metadata array into variables
    extract($meta_data);
    $directional_nav = $settings['global_slider_settings'] == 'on' ? $settings['slider_directional_nav'] == 'on' : isset($_mtphr_gallery_slider_directional_nav) && $_mtphr_gallery_slider_directional_nav;
    $resources = mtphr_gallery_resource_meta($post_id);
    if (is_array($resources) && count($resources) > 1) {
        $html = '';
        if ($directional_nav) {
            $html .= '<a href="#" class="mtphr-gallery-nav-prev" rel="nofollow">' . apply_filters('mtphr_gallery_navigation_previous', __('Previous', 'mtphr-galleries')) . '</a>';
            $html .= '<a href="#" class="mtphr-gallery-nav-next" rel="nofollow">' . apply_filters('mtphr_gallery_navigation_next', __('Next', 'mtphr-galleries')) . '</a>';
        }
        echo $html;
    }
}
 function get_mtphr_gallery_thumbnail($post_id = false, $width = false, $height = false)
 {
     $post_id = $post_id ? $post_id : get_the_id();
     // Return the featured image thumbnail
     if ($att_id = get_post_thumbnail_id($post_id)) {
         return wp_get_attachment_image($att_id, apply_filters('mtphr_galleries_thumbnail_size', 'thumbnail'));
     } else {
         // Return the first attachment thumbnail
         $resources = mtphr_gallery_resource_meta($post_id);
         if (is_array($resources) && isset($resources[0])) {
             if (is_array($resources[0])) {
                 return get_mtphr_gallery_resource_thumbnail($resources[0]);
             } else {
                 return mtphr_galleries_thumbnail($resources[0], false, false, apply_filters('mtphr_galleries_thumbnail_size', 'thumbnail'));
             }
         }
     }
     return false;
 }
/**
 * Return the gallery resources
 *
 * @since 1.0.0
 */
function get_mtphr_gallery_resources($post_id = false, $width = false, $height = false)
{
    $post_id = $post_id ? $post_id : get_the_id();
    $resources = mtphr_gallery_resource_meta($post_id);
    if (is_array($resources) && isset($resources[0])) {
        $gallery = '<div class="mtphr-gallery-resource-container">';
        foreach ($resources as $i => $resource) {
            $resource = apply_filters('mtphr_galleries_resource_data', $resource);
            $div = '<div id="mtphr-gallery-resource-' . $i . '" class="mtphr-gallery-resource mtphr-gallery-resource-' . $resource['type'] . '">';
            $div .= get_mtphr_gallery_resource($resource, $width, $height);
            $div .= '</div>';
            $gallery .= apply_filters('mtphr_gallery_resource', $div, $resource, $width, $height, $post_id);
        }
        $gallery .= '</div>';
        return $gallery;
    }
    return false;
}