Notification email when posts are updated/changed

Hi there

Glad you’re interested in leveraging the plugin!

Currently, you need to do add your custom event to the queue as follows: WP_Digest_Queue::add( '[email protected]', 'your_notification_type', $post_id );. After that, you’d filter the message sent in the email using the digest_event_message filter.

However, I’m in the middle of rewriting the plugin to make this easier, so stay tuned!

OK, so if I declare my custom function in my child theme functions.php, and I attach it to the filter “digest_event_message”, it should work… More or less:

function updated_send_email( $post_id ) {
	// If this is just a revision, don't send the email.
	if ( wp_is_post_revision( $post_id ) )
		return;
	$post_title = get_the_title( $post_id );
	$post_url = get_permalink( $post_id );
	$subject = 'A post has been updated';

	$message = "A post has been updated on your website:\n\n";
	$message .= $post_title . ": " . $post_url;

	return $message;

	//before i was sending a mail:
	//wp_mail( '[email protected]', $subject, $message );
	//Now you suggest:
	//I guess that I need to declare the 'updated_post' item before
	add_filter( 'digest_event_message', $message, 'updated_post' );
}
add_action( 'save_post', 'updated_send_email' );

Thanks for your guidance!

More precisely you should do something like that (untested!):

function updated_send_email( $post_id ) {
	// If this is just a revision, don't send the email.
	if ( wp_is_post_revision( $post_id ) ) {
		return;
	}

	// Add to queue.
	WP_Digest_Queue::add( '[email protected]', 'your_notification_type', $post_id );
}

add_action( 'save_post', 'updated_send_email' );

/**
 * Filter the digest message for our own notifications.
 *
 * @param string $message  The message.
 * @param array  $item          The event item.
 * @return string The filtered message.
 */
function updated_digest_message( $message, $item ) {
	if ( 'your_notification_type' !== $item[1] ) {
		return;
	}

	$time_the_event_was_queued = $item[0];
	$post_id = $item[2];

	$message = "A post has been updated on your website...";

	return $message;
}

add_filter( 'digest_event_message', 'updated_digest_message', 10, 2 );

Again, this will most likely change in the future. We will make it way easier to do such things, so keep an eye on the plugin updates. There will also be some detailed documentation on how to do this.

Hi Pascal, thanks for your help.
I’m trying to do some tests with the plugin configuration and the notification messages, but I don’t know how to test it “immediately”. Is there any way to debug it? And see if the data is being processed correctly?
And, another question: What kind of notifications is sending the plugin by default? Have you considered allowing to control these parameters through the options panel? I think that it will be helpful for users in order to configure it, don’t you think?
Again, thank you very much for your help Pascal!