<?php

/**
 *
 * @param array $form_options
 * @param type $widget
 * @return array
 */
function ls_extend_sow_slider_form_add_hide_frame($form_options, $widget) {
    $form_options['frames']['fields']['hide_frame'] = array('type' => 'checkbox',
        'label' => __('Hide this frame', 'so-widgets-bundle'),
        'default' => false,);
    return $form_options;
}

add_filter('siteorigin_widgets_form_options_sow-slider', 'ls_extend_sow_slider_form_add_hide_frame', 10, 2);

/**
 *
 * @param type $instance
 * @param type $args
 * @return array
 */
function ls_slider_hide_the_hidden_frame($instance, $args) {
    $frames = empty($instance['frames']) ? array() : $instance['frames'];
	if (!empty($frames)) {
        foreach ($frames as $i => $frame) {
            if ($frame['hide_frame']) {
				unset($frames[$i]);
            }
        }
		$frames=array_values($frames);

        foreach ($frames as &$frame) {
            $link_atts = array();
            if (!empty($frame['new_window'])) {
                $link_atts['target'] = '_blank';
                $link_atts['rel'] = 'noopener noreferrer';
            }
            $frame['link_attributes'] = $link_atts;
        }
    }

    return array(
        'controls' => $instance['controls'],
        'frames' => $frames,
    );
}

add_filter('siteorigin_widgets_template_variables_sow-slider', 'ls_slider_hide_the_hidden_frame', 10, 2);