Get popular downloads for recent XX days. Easy Digital Downloads.

edd-popular-downloads.php

<?php

function ap_get_edd_logs( $args = array() ) {
	global $edd_logs;

	// Prevent the queries from getting cached. Without this there are occasional memory issues for some installs
	wp_suspend_cache_addition( true );

	$logs_data = array();
	$download  = null;

	$defaults = array(
		'posts_per_page' => 40,
	);
	$args = wp_parse_args( $args, $defaults );
	
	$log_query = array(
		'post_parent' 		=> $download,
		'log_type'    		=> 'sale',
		'posts_per_page'	=> $args['posts_per_page'],
	);

	$logs = $edd_logs->get_connected_logs( $log_query );

	if ( $logs ) {
		foreach ( $logs as $log ) {
			$payment_id = get_post_meta( $log->ID, '_edd_log_payment_id', true );

			// Make sure this payment hasn't been deleted
			if ( get_post( $payment_id ) ) :
				$logs_data[] = array(
					'download_id'	=> $log->post_parent,
				);
			endif;
		}
	}

	return $logs_data;
}
function ap_edd_get_recent_download_ids( $posts = 40, $recent = 6 ) {
		
	// 40 seems like a good number as an estimate of orders in the recent month.
	$downloads = ap_get_edd_logs( array( 'posts_per_page' => $posts ) );
		
	$ids = $recent_download_ids = array();
	
	if ( $downloads ) {
		
		foreach( $downloads as $key => $value ) {				
			$recent_download_ids[] = $value['download_id'];
		}
		
		// Order by unique values and count them.
		$values = array_count_values( $recent_download_ids );
		
		// Sort from order 'large' to 'small', so more 'orders' is higher in the array.
		arsort( $values, SORT_NUMERIC  );
		
		/**
		 * query_args
		 *
		 * @uses	array_slice — Extract a slice of the array ( (int) 0 - [starting key], (int) $recent [max key number] )
		 * @uses	array_keys — Return all the keys or a subset of the keys of an array
		 */
		 $ids = array_slice( array_keys( $values ), 0, $recent );
	}
	return $ids;
}

$key 	= 'edd_get_popular_downloads';
$query	= wp_cache_get( $key );

if ( false === $query ) {
	
	$post__in = edd_get_recent_download_ids( 30, 3 );
	
	$query_args = array(
		'post_type'		=> 'download',
		'post_status'		=> 'publish',
		'posts_per_page'	=> 6,
		'post__in'		=> $post__in
	);
	
	$query = new WP_Query( $query_args );
	
	wp_cache_set( $key, $query );
}


while ( $query->have_posts() ) : $query->the_post();
	// Loop		
endwhile;

wp_reset_query();

I'm going to follow up and say my use is a special use case. I've moved outside of downloads as my post type. I ended up figuring it out after a quick break. Since I've got multiple post types that use downloads for the front end I was using CPT-onomies to tie them together. This is the $args I had to update to:

$query_args = array(
            'post_type'         => 'plugin',
            'post_status'       => 'publish',
            'posts_per_page'    => 6,
        #   'post__in'          => $post__in,
            'suppress_filters'  => false,
            'tax_query'         => array(
                array(
                    'taxonomy'  => 'download', // EDD download post_type (CPT connection)
                    'field'     => 'id', // can be slug or id - a CPT-onomy term's ID is the same as its post ID
                    'terms'     => $post__in 
                )
            )
        );