Delay list subscription in MailChimp for WordPress when registration is moderated by BP Registration Options

mailchimp-bp-reg-options.php

<?php

/**
 * Delay MailChimp subscription when registration is moderated.
 *
 * Only users who have requested to be signed up to the list will be passed
 * to this callback, so store that fact in usermeta for later processing.
 *
 * @param bool $delay False delays subscription, true does not
 * @param int $user_id The user ID to subscribe
 * @return bool False delays subscription, otherwise passes through
 */
function my_mailchimp_subscribe_delay( $delay, $user_id ) {

	// check for presence of BP Registration Options plugin on main site
	if ( defined( 'BP_REGISTRATION_OPTIONS_VERSION' ) AND is_main_site() ) {

		// if moderation is enabled
		$moderate = get_option( 'bprwg_moderate' );
		if ( $moderate ) {

			// store flag in usermeta
			bp_update_user_meta( $user_id, '_my_mailchimp_meta_key', 'y' );

			// delay
			return false;

		}

	}

	// fall back to existing
	return $delay;

}

add_filter( 'mc4wp_integration_buddypress_should_subscribe', 'my_mailchimp_subscribe_delay', 10, 2 );



/**
 * Do the delayed MailChimp subscription when registered user is approved via
 * the BP Registration Options plugin.
 *
 * @param int $user_id The user ID to subscribe
 */
function my_mailchimp_subscribe_now( $user_id ) {

	// get subscription flag
	$subscribe = bp_get_user_meta( $user_id, '_my_mailchimp_meta_key', true );

	// bail if we don't have it
	if ( $subscribe !== 'y' ) return;

	// delete subscription flag
	bp_delete_user_meta( $user_id, '_my_mailchimp_meta_key' );

	// fire action to subscribe user to MailChimp list
	do_action( 'mc4wp_integration_buddypress_subscribe_user', $user_id );

}

add_action( 'bpro_hook_approved_user', 'my_mailchimp_subscribe_now', 10, 1 );