FavoriteCount.php

<?php 
namespace Favorites\Entities\Post;

/**
* Returns the total number of favorites for a post
*/
class FavoriteCount
{
	/**
	* Get the favorite count for a post
	*/
	public function getCount($post_id, $site_id = null)
	{
		if ( (is_multisite()) && (isset($site_id)) && ($site_id !== "") ) switch_to_blog(intval($site_id));
		$count = get_post_meta($post_id, 'simplefavorites_count', true);
		if ( $count == '' ) $count = 0;
		if ( (is_multisite()) && (isset($site_id) && ($site_id !== "")) ) restore_current_blog();
		return intval($count);
	}

	/**
	* Get the favorite count for all posts in a site
	*/
	public function getAllCount($site_id = null)
	{
		if ( (is_multisite()) && (isset($site_id)) && ($site_id !== "") ) switch_to_blog(intval($site_id));
		global $wpdb;
		$query = "SELECT SUM(meta_value) AS favorites_count FROM {$wpdb->prefix}postmeta WHERE meta_key = 'simplefavorites_count'";
		$count = $wpdb->get_var( $query );
		if ( (is_multisite()) && (isset($site_id) && ($site_id !== "")) ) restore_current_blog();
		return intval($count);
	}
}