Append brand name from custom pods field to TSF generated title.php

pods-append-tsf-gen-title.php

<?php

add_filter(
	'the_seo_framework_title_from_generation',
	function ( $title, $args ) {

		// If Pods is deactivated, skip further processing.
		if ( ! function_exists( 'pods_field' ) ) return $title;

		if ( null === $args ) {
			// Front end.
			$tsfquery = tsf()->query();

			$post_id    = $tsfquery->get_the_real_id();
			$is_product = $tsfquery->is_product();
		} elseif ( 'single' === The_SEO_Framework\get_query_type_from_args( $args ) ) {
			$post_id    = $args['id'];
			$is_product = 'product' === get_post_type( $post_id );
		}

		// If we're not modifying a product, bail.
		if ( empty( $is_product ) ) return $title;

		// Grabs the subtitle meta field from the product.
		$subtitle = get_post_meta( $post_id, 'subtitle', true );

		// Extract the brandname.
		preg_match( '/By :(.*?)/', $subtitle, $matches );

		// Append brandname (if any). TSF will remove extraneous spaces.
		return "$title $matches[1]";
	},
	10,
	2,
);