function groups_notification_promoted_member( $user_id = 0, $group_id = 0 ) {

	// What type of promotion is this?
	if ( groups_is_user_admin( $user_id, $group_id ) ) {
		$promoted_to = __( 'an administrator', 'buddypress' );
		$type        = 'member_promoted_to_admin';
	} else {
		$promoted_to = __( 'a moderator', 'buddypress' );
		$type        = 'member_promoted_to_mod';
	}

	// Trigger a BuddyPress Notification.
	if ( bp_is_active( 'notifications' ) ) {
		bp_notifications_add_notification( array(
			'user_id'           => $user_id,
			'item_id'           => $group_id,
			'component_name'    => buddypress()->groups->id,
			'component_action'  => $type,
		) );
	}

	// Bail if admin opted out of receiving this email.
	if ( 'no' === bp_get_user_meta( $user_id, 'notification_groups_admin_promotion', true ) ) {
		return;
	}

	$unsubscribe_args = array(
		'user_id'           => $user_id,
		'notification_type' => 'groups-member-promoted',
	);

	$group = groups_get_group( $group_id );
	$args  = array(
		'tokens' => array(
			'group'       => $group,
			'group.id'    => $group_id,
			'group.url'   => esc_url( bp_get_group_permalink( $group ) ),
			'group.name'  => $group->name,
			'promoted_to' => $promoted_to,
			'user.id'     => $user_id,
			'unsubscribe' => esc_url( bp_email_get_unsubscribe_link( $unsubscribe_args ) ),
		),
	);
	bp_send_email( 'groups-member-promoted', (int) $user_id, $args );
}