Auto add json+ld for photo module images

[pross]

add_action( 'fl_builder_before_render_module', function( $module ) {
	if ( $module instanceof FLPhotoModule ) {
		if ( ! empty( $module->settings->photo_src ) ) {
			$output = '';
			$parts = array(
				'@context'           => 'https://schema.org/',
				'@type'              => 'ImageObject',
				'contentUrl'         => $module->settings->photo_src,
				'license'            => 'https://example.com/license',
				'acquireLicensePage' => 'https://example.com/how-to-use-my-images',
			);

			// output this
			$output .= '<script type="application/ld+json">[{';
			foreach ( $parts as $type => $value ) {
				$output .= sprintf( '"%s": "%s",', $type, $value );
			}
			$output = rtrim( $output, ',' ) . '}]</script>';
			echo $output;
		}
	}
});