Filter Wordpress media by user

Filter Wordpress media by user

add_action('pre_get_posts', 'um_filter_media_files');
add_filter('wp_count_attachments', 'um_recount_attachments');


function um_recount_attachments($counts_in){
	global $wpdb;
	global $current_user;

	$and = wp_post_mime_type_where(''); // Default mime type // AND post_author = {$current_user->ID}
	$count = $wpdb->get_results("SELECT post_mime_type, COUNT(*) AS num_posts FROM $wpdb->posts WHERE post_type = 'attachment' AND post_status != 'trash' AND post_author = {$current_user->ID} $and GROUP BY post_mime_type", ARRAY_A);

	$counts = array();
	
	foreach((array)$count as $row){
		$counts[$row['post_mime_type']] = $row['num_posts'];
	}

	$counts['trash'] = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->posts WHERE post_type = 'attachment' AND post_author = {$current_user->ID} AND post_status = 'trash' $and");
	
	return $counts;
}
function um_filter_media_files($wp_query){
	global $current_user;
	$wp_query = $wp_query;
	
	// Check so the $wp_query->query['post_type'] isset
	if(isset($wp_query->query['post_type'])){
		if(get_option('wpusmeadminself') == '1'){
			if(current_user_can('manage_options') && (is_admin() && $wp_query->query['post_type'] === 'attachment')){
				$wp_query->set('author', $current_user->ID);
			}
		}
	
		if(!current_user_can('manage_options') && (is_admin() && $wp_query->query['post_type'] === 'attachment')){
			$wp_query->set('author', $current_user->ID);
		}
	}
}