Impreza Portfolio shortcode with random option

add_action( 'after_setup_theme', 'child_theme_setup', 20 );

function child_theme_setup() {
    remove_shortcode('vc_portfolio');
    add_shortcode('vc_portfolio', 'my_portfolio');
}

function my_portfolio($attributes, $content) {
    $attributes = shortcode_atts(
        array(
            'pagination' => false,
            'filters' => false,
            'columns' => 3,
            'category' => null,
            'items' => null,
            'ratio' => '3:2',
            'with_indents' => false,
            'random' => false
        ), $attributes);

    if ( ! in_array($attributes['columns'], array(2,3,4,5)))
    {
        $attributes['columns'] = 3;
    }

    if ( ! in_array($attributes['ratio'], array('3:2','4:3','1:1', '2:3', '3:4',)))
    {
        $attributes['ratio'] = '3:2';
    }

    $attributes['ratio'] = str_replace(':', '-', $attributes['ratio']);

    global $wp_query;

    $attributes['items'] = intval($attributes['items']);
    $portfolio_items = (is_integer($attributes['items']) AND $attributes['items'] > 0)?$attributes['items']:$attributes['columns'];

    global $paged;

    if (is_front_page()) {
        $page_string = 'page';
    } else {
        $page_string = 'paged';
    }

    if ($attributes['pagination'] == 1 OR $attributes['pagination'] == 'yes') {
        $paged = get_query_var($page_string) ? get_query_var($page_string) : 1;
    } else {
        $paged = 1;
    }

    $args = array(
        'post_type'         => 'us_portfolio',
        'posts_per_page'    => $portfolio_items,
        'post_status'       => 'publish',
        'orderby'           => 'date',
        'order'             => 'DESC',
        'paged'             => $paged
    );

    if ($attributes['random'] == 1 OR $attributes['random'] == 'yes') {
        $args['orderby'] = 'rand';
    }

    $filters_html = $sortable_class = '';
    $categories_slugs = null;

    if ( ! empty($attributes['category'])) {

        $categories_slugs = explode(',', $attributes['category']);
        $args['tax_query'] = array(
            array(
                'taxonomy' => 'us_portfolio_category',
                'field' => 'slug',
                'terms' => $categories_slugs
            )
        );
    }


    if ($attributes['filters'] == 1 OR $attributes['filters'] == 'yes') {
        $categories = get_terms('us_portfolio_category');

        if ( ! empty($categories_slugs))
        {
            foreach ($categories as $cat_id => $category)
            {
                if ( ! in_array($category->slug, $categories_slugs)) {
                    unset($categories[$cat_id]);
                }
            }
        }

        if (count($categories) > 1) {
            $filters_html .= '<div class="w-filters"><div class="w-filters-list">
                                <div class="w-filters-item active">
                                    <a class="w-filters-item-link" href="javascript:void(0);" data-filter="*">'.__('All', 'us').'</a>
                                </div>';
            foreach($categories as $category) {
                $filters_html .= '<div class="w-filters-item">
                                    <a class="w-filters-item-link" href="javascript:void(0);" data-filter=".'.$category->slug.'">'.$category->name.'</a>
                                </div>';
            }

            $filters_html .= '</div></div>';
        }
    }

    if ($filters_html != '') {
        $sortable_class = ' type_sortable';
    }

    $with_indents_class = ($attributes['with_indents'] == 1 OR $attributes['with_indents'] == 'yes')?' with_indents':'';

    $output = '<div class="w-portfolio type_1 align_center columns_'.$attributes['columns'].' ratio_'.$attributes['ratio'].$sortable_class.$with_indents_class.'">
                    '.$filters_html;

    $temp = $wp_query; $wp_query= null;

    $output .= '<div class="w-portfolio-list">';

    $wp_query = new WP_Query($args);

    $portfolio_order_counter = 0;

    while ( $wp_query->have_posts() )
    {
        $wp_query->the_post();
        $portfolio_order_counter++;
        $item_categories_links = '';
        $item_categories_classes = '';
        $item_categories = get_the_terms(get_the_ID(), 'us_portfolio_category');
        if (is_array($item_categories))
        {
            foreach ($item_categories as $item_category)
            {
                $item_categories_links .= $item_category->name.' / ';
                $item_categories_classes .= ' '.$item_category->slug;
            }
        }
        if (function_exists('mb_strlen'))
        {
            if (mb_strlen($item_categories_links) > 0 )
            {
                $item_categories_links = mb_substr($item_categories_links, 0, -2);
            }
        }
        else
        {
            if (strlen($item_categories_links) > 0 )
            {
                $item_categories_links = substr($item_categories_links, 0, -2);
            }
        }

        $link_ref = $link_target = '';
        $link = esc_url( apply_filters( 'the_permalink', get_permalink() ) );

        if (rwmb_meta('us_custom_link') != ''){
            $link = rwmb_meta('us_custom_link');
            if (rwmb_meta('us_custom_link_blank') == 1){
                $link_target = ' target="_blank"';
            }
        }

        if (rwmb_meta('us_lightbox') == 1){
            $img_id = get_post_thumbnail_id();
            $link = wp_get_attachment_image_src($img_id, 'full');
            $link = $link[0];
            $link_ref = ' ref="magnificPopup"';
        }

        $output .= '<div class="w-portfolio-item order_'.$portfolio_order_counter.$item_categories_classes.'">
                        <div class="w-portfolio-item-h">
                            <a class="w-portfolio-item-anchor"'.$link_target.$link_ref.' href="'.$link.'">
                                <div class="w-portfolio-item-image">';
        if (has_post_thumbnail()) {
            $output .= get_the_post_thumbnail(null, 'portfolio-list-'.$attributes['ratio'], array('class' => 'w-portfolio-item-image-first'));
        } else {
            $output .= '<img class="w-portfolio-item-image-first" src="'.get_template_directory_uri().'/img/placeholder/500x500.gif" alt="">';
        }

        $additional_image = '';
        if (rwmb_meta('us_additional_image') != '')
        {
            $additional_img_id = preg_replace('/[^\d]/', '', rwmb_meta('us_additional_image'));
            $additional_img = wp_get_attachment_image_src($additional_img_id, 'portfolio-list-'.$attributes['ratio'], 0);

            if ( $additional_img != NULL )
            {
                $additional_image = $additional_img[0];
            }
        }
        if ($additional_image != '')
        {
            $output .= '<img class="w-portfolio-item-image-second" src="'.$additional_image.'" alt="">';
        }
                $output .= '    </div>
                                <div class="w-portfolio-item-meta">
                                    <div class="w-portfolio-item-meta-h">
                                        <h2 class="w-portfolio-item-title">'.the_title('','', FALSE).'</h2>
                                        <span class="w-portfolio-item-arrow"></span>
                                    </div>
                                </div>
                            </a>
                        </div>
                    </div>';
    }

    $output .= '</div>';
    if ($attributes['pagination'] == 1 OR $attributes['pagination'] == 'yes') {
        if ($pagination = us_pagination()) {
            $output .= '<div class="w-portfolio-pagination">
                <div class="g-pagination align_center">
                    '.$pagination.'
                </div>
            </div>';
        }
    }

    $output .= '</div>';

    wp_reset_postdata();
    $wp_query= $temp;

    return $output;

}


add_action('init', function()
{
    //Get VC gallery shortcode config
    $shortcode_vc_portfolio_tmp = WPBMap::getShortCode('vc_portfolio');

    //print_r($shortcode_vc_portfolio_tmp);

    $shortcode_vc_portfolio_tmp['params'][] = array(
            "type" => 'checkbox',
            "heading" => __("Random order", "js_composer"),
            "param_name" => "random",
            "description" => __("If checked, the items will be shown in random order", "js_composer"),
            "value" => Array(__("Turn on random order", "js_composer") => 'yes')
        );

    //VC doesn't like even the thought of you changing the shortcode base, and errors out, so we unset it.
    unset($shortcode_vc_portfolio_tmp['base']);

    //Update the actual parameter
    vc_map_update('vc_portfolio', $shortcode_vc_portfolio_tmp);
}, 100);