location.go

package location

type Client struct {
    clients []locationiface.Client
}

func NewClient(clients ...locationiface.Client) *Client {
    return &Client{clients: clients}
}

func (c *Client) DriveTime(ctx context.Context, locations ...Location) (float64, error) {
    // Call external APIs.
    for idx, c := range clients {
        driveTime, err := c.DriveTime(ctx, locations...)
        if err == nil {
            return driveTime, nil
        }
        log.WithError(err).WithField("client_idx", idx).Error("Error retrieving driving distance.")
    }
    return 0, errors.New("failed to retrieve drive time from any client")
}