Code snippets for the "Private Messages" extension

um_messaging_autodelete.php

<?php

// Delete private messages after 6 months.
add_action( 'um_daily_scheduled_events', 'um_messaging_autodelete' );
function um_messaging_autodelete() {
	global $wpdb;

	$timestamp = strtotime( '6 months ago');

	$sql = $wpdb->prepare(
		"DELETE FROM %i WHERE `time` < %s",
		$wpdb->prefix . 'um_messages',
		wp_date( 'Y-m-d H:i:s', $timestamp )
	);

	return $wpdb->query( $sql );
}

um_messaging_mail_notification_custom.php

<?php

// Replace a function that sends the "Private Messages - New Message" email.
// New function supports the {message} placeholder used to add the message content.

remove_action( 'um_after_new_conversation', 'um_messaging_mail_notification', 20, 3 );
add_action( 'um_after_new_conversation', 'um_messaging_mail_notification_custom', 20, 3 );

function um_messaging_mail_notification_custom( $to, $from, $conversation_id, $template = 'new_message' ) {
	if ( ! UM()->Messaging_API()->api()->enabled_email( $to, '_enable_new_pm' ) ) {
		return;
	}

	// send a mail notification
	um_fetch_user( $to );
	$recipient_e = um_user('user_email');
	$recipient = um_user('display_name');
	$message_history = add_query_arg('profiletab', 'messages', um_user_profile_url() );

	// who sends the message
	um_fetch_user( $from );
	$sender = um_user('display_name');

	$mail_args = array(
		$recipient_e,
		$template,
		array(
			'plain_text'   => 1,
			'path'         => um_messaging_path . 'templates/email/',
			'tags'         => array(
				'{recipient}',
				'{message_history}',
				'{sender}',
				'{message}',
			),
			'tags_replace' => array(
				$recipient,
				$message_history,
				$sender,
				sanitize_textarea_field( $_POST['content'] ),
			),
		),
	);

	UM()->maybe_action_scheduler()->enqueue_async_action( 'um_dispatch_email', $mail_args );
}