Coding a default custom message on Publicize

Hi there,

Thanks to the great Jeremy Herve on (https://ww.wp.xz.cn/support/topic/jetpack-publicize?replies=18), using a Functionality plugin I’ve been able to define a default custom message for all new posts. However, the code supplied defined the category of the post.

I was wondering, would anyone know how to manipulate his suggested code (below) to grab just the title of the post? That would then be used for the custom message.

// Create our custom Publicize message
function jeherve_cust_pub_message() {
	$post = get_post();

	// Grab the first category of your post
	if ( !empty( $post ) )
		$categories = get_the_category( $post->ID );

	if ( !empty( $categories ) ) {
		$previous_cust = get_post_meta( $post->ID, '_wpas_mess', true );

		$custom_message = $categories[0]->cat_name . ' ' . $previous_cust;

		update_post_meta( $post->ID, '_wpas_mess', $custom_message );
	}
}

// Save that message
function jeherve_cust_pub_message_save() {
	add_action( 'save_post', 'jeherve_cust_pub_message', 21 );
}
add_action( 'publish_post', 'jeherve_cust_pub_message_save' );'

If possible, the custom message could be ‘title’ by ‘author’. But my main headache is getting the title into that code! I’ve tried implementing get_title, but to no avail. I know Publicize has filters defined for use with the custom message, but I’m not sure how to implement them. I have a working knowledge of PHP, but not fluent.

Any help would be hugely appreciated!