Add support for WooCommerce Admin filters when searching Orders with SearchWP

searchwp-customizations.php

<?php

// Add support for WooCommerce Admin filters when searching Orders with SearchWP.
add_filter( 'searchwp\query\mods', function( $mods, $query ) {
	global $wpdb;

	if ( isset( $_GET['_customer_user'] ) && ! empty( $_GET['_customer_user'] ) ) {
		$mod = new \SearchWP\Mod( \SearchWP\Utils::get_post_type_source_name( 'shop_order' ) );
		$mod->set_local_table( $wpdb->postmeta );
		$mod->on( 'post_id', [ 'column' => 'id' ] );
		$mod->on( 'meta_key', [ 'value' => '_customer_user' ] );

		$mod->raw_where_sql( function( $runtime_mod ) use ( $wpdb ) {
			return $wpdb->prepare( "{$runtime_mod->get_local_table_alias()}.meta_value = %d", absint( $_GET['_customer_user'] ) );
		} );

		$mods[] = $mod;
	}

	if ( isset( $_GET['m'] ) && ! empty( $_GET['m'] ) ) {
		$mod = new \SearchWP\Mod( \SearchWP\Utils::get_post_type_source_name( 'shop_order' ) );

		$mod->raw_where_sql( function( $runtime_mod ) use ( $wpdb ) {
			return $wpdb->prepare( "DATE_FORMAT( {$runtime_mod->get_local_table_alias()}.post_date, \"%Y%m\" ) = %d", absint( $_GET['m'] ) );
		} );

		$mods[] = $mod;
	}

	return $mods;
}, 99, 2 );