Future Posts Extension widget

future-posts-extension.php

<?php
/*
Plugin Name: Future Posts Extension
Plugin URI: http://tiptoppress.com/downloads/term-and-category-based-posts-widget/
Description: Extension to show only Posts which are in the future with the 'The future is now' widget for the premium widget Term and Category Based Posts Widget.
Additional needed widgets: 'The future is now' (https://wordpress.org/plugins/the-future-is-now/)
Author: TipTopPress
Version: 0.1
Author URI: http://tiptoppress.com
*/
namespace termCategoryPostsPro\FuturePostsExtension;
// Don't call the file directly
if ( !defined( 'ABSPATH' ) ) exit;

/**
 *  Applied to the list of dates in the future
 *  
 *  @return array of sort orders
 *  
 *  @since 0.1
 */
function query_args ( $query_args, $this, $instance ) { 
	
	if (isset($instance['use_only_future_posts_filter']) && $instance['use_only_future_posts_filter']) {
		$current_date = date('Y-m-d');
		$query_args['date_query'] = array( 'after' => $current_date );
	}
    
    return $query_args;
}
add_filter( 'cpwp_query_args', __NAMESPACE__.'\query_args', 10, 3 );

/**
 *  Adds a new Check box to the bottom of the Filter panel
 *  
 *  @return array of sort orders
 *  
 *  @since 0.1
 */
function cpwp_add_extensions_panel( $widget, $instance ) {
	$instance = wp_parse_args( ( array ) $instance, array(
		'use_only_future_posts_filter' => ''
	) );
	$use_only_future_posts_filter = $instance['use_only_future_posts_filter'];
			
	echo '<p>'.
			'<label for="'.$widget->get_field_id('use_only_future_posts_filter').'">'.
				'<input type="checkbox" class="checkbox" id="'.$widget->get_field_id('use_only_future_posts_filter').'" name="'.$widget->get_field_name('use_only_future_posts_filter').'" ';
	echo			checked( (bool) $instance["use_only_future_posts_filter"], true ).' />';
	echo		_e( 'Show "Posts in the future" (filter extention)','categorypostspro' ).
			'</label>'.
		'</p>';
}
add_filter('cpwp_bottom_filter_panel',__NAMESPACE__.'\cpwp_add_extensions_panel', 10, 2);