How to Create Featured Downloads for Easy Digital Downloads | http://www.ibenic.com/create-featured-downloads-for-edd

class.php

<?php

/**
 * Adding the Featured Class
 * @param  array $classes 
 * @return array          
 */
function ibenic_edd_featured_class( $classes ) {
	global $post;

	// Code will go here
	 
	return $classes;
}
add_filter( 'post_class', 'ibenic_edd_featured_class' );

class2.php

<?php
// ibenic_edd_featured_class( $classes )
	 
if( 'download' == $post->post_type ) {
  $is_featured = (boolean) get_post_meta( $post->ID, '_edd_featured', true );

  if( $is_featured ) {
    $classes[] = 'edd-featured';
  }
}
	 
	 

metabox.php

<?php

add_action( 'edd_meta_box_settings_fields', 'ibenic_edd_featured_field', 20 );

/**
 * Adding the Featured Field to the Settings
 * @param  integer $post_id 
 * @return void          
 */
function ibenic_edd_featured_field( $post_id ) {

  // Code will go here
}

metabox2.php

<?php

// ibenic_edd_featured_field( $post_id ) 

$featured = (bool) get_post_meta( $post_id, '_edd_featured', true );

?>
	<div id="edd_featured_wrap">
		<p><strong><?php _e( 'Featured Field:', 'ibenic_edd' ); ?></strong></p>
		<label for="_edd_featured">
      
			<?php echo EDD()->html->checkbox( array(
				'name'    => '_edd_featured',
				'current' => $featured,
			) ); ?>
      
			<?php _e( 'Set this product as a featured one', 'ibenic_edd' ); ?> 
      
		</label>
	</div>
<?php

query.php

<?php

add_action( 'pre_get_posts', 'ibenic_edd_query' );

/**
 * Editing WP Query (Main Query)
 * @param  WP_Query $query 
 * @return void        
 */
function ibenic_edd_query( $query ) {

	if( is_post_type_archive( 'download' ) && $query->is_main_query() ) {
	 	
    // Code will go here
	 	 
	}
	
}

query2.php

<?php

// ibenic_edd_query

$meta_query = array(
  'relation' => 'OR',
  'with_key' => array(
    'key'     => '_edd_featured',
    'compare' => 'EXISTS',
  ),
  'no_key' => array(
    'key'     => '_edd_featured',
    'compare' => 'NOT EXISTS',
  )
);

$query->set( 'meta_query', $meta_query );

query3.php

<?php

// ibenic_edd_query

$orderby = array( 
    'with_key' => 'DESC',
    'post_date' => 'DESC',
);

$query->set( 'orderby', $orderby );

save.php

<?php

add_filter( 'edd_metabox_fields_save', 'ibenic_edd_featured_field_save' );

/**
 * Adding our Featured Field to be saved as EDD field
 * @param  array $fields 
 * @return array         
 */
function ibenic_edd_featured_field_save( $fields ) {
	$fields[] = '_edd_featured';

	return $fields;
}