bp_nouveau_ajax_send_group_invites()

function bp_nouveau_ajax_send_group_invites() {
	$bp = buddypress();

	$response = array(
		'feedback' => __( 'Invites could not be sent. Please try again.', 'buddyboss' ),
		'type'     => 'error',
	);

	// Verify nonce
	if ( empty( $_POST['_wpnonce'] ) || ! wp_verify_nonce( $_POST['_wpnonce'], 'groups_send_invites' ) ) {
		wp_send_json_error( $response );
	}

	$group_id = bp_get_current_group_id()?: $_POST['group_id'];

	if ( bp_is_group_create() && ! empty( $_POST['group_id'] ) ) {
		$group_id = (int) $_POST['group_id'];
	}

	if ( ! bp_groups_user_can_send_invites( $group_id ) ) {
		$response['feedback'] = __( 'You are not allowed to send invitations for this group.', 'buddyboss' );
		wp_send_json_error( $response );
	}

	if ( empty( $_POST['users'] ) ) {
		wp_send_json_error( $response );
	}

	if ( ! empty( $_POST['message'] ) ) {
		$bp->groups->invites_message = wp_kses( wp_unslash( $_POST['message'] ), array() );

		add_filter( 'groups_notification_group_invites_message', 'bp_nouveau_groups_invites_custom_message', 10, 1 );
	}

	// For feedback
	$invited = array();

	foreach ( (array) $_POST['users'] as $user_id ) {
		$invited[ (int) $user_id ] = groups_invite_user(
			array(
				'user_id'  => $user_id,
				'group_id' => $group_id,
			)
		);
	}

	// Send the invites.
	groups_send_invites( bp_loggedin_user_id(), $group_id );

	if ( ! empty( $_POST['message'] ) ) {
		unset( $bp->groups->invites_message );

		remove_filter( 'groups_notification_group_invites_message', 'bp_nouveau_groups_invites_custom_message', 10, 1 );
	}

	if ( array_search( false, $invited ) ) {
		$errors = array_keys( $invited, false );

		$error_count   = count( $errors );
		$error_message = sprintf(
			/* translators: count of users affected */
			_n(
				'Invitation failed for %s user.',
				'Invitation failed for %s users.',
				$error_count, 'buddyboss'
			),
			number_format_i18n( $error_count )
		);

		wp_send_json_error(
			array(
				'feedback' => $error_message,
				'users'    => $errors,
				'type'     => 'error',
			)
		);
	}

	wp_send_json_success(
		array(
			'feedback' => __( 'Invitations sent.', 'buddyboss' ),
			'type'     => 'success',
		)
	);
}