Route Optimization API: Node.js Client

 npm install @googlemaps/routeoptimization 

 /**
 * This snippet has been automatically generated and should be regarded as a code template only.
 * It will require modifications to work.
 * It may require correct/in-range values for request initialization.
 * TODO(developer): Uncomment these variables before running the sample.
 */
/**
 *  Required. Target project or location to make a call.
 *  Format:
 *  * `projects/{project-id}`
 *  * `projects/{project-id}/locations/{location-id}`
 *  If no location is specified, a region will be chosen automatically.
 */
// const parent = 'abc123'
/**
 *  If this timeout is set, the server returns a response before the timeout
 *  period has elapsed or the server deadline for synchronous requests is
 *  reached, whichever is sooner.
 *  For asynchronous requests, the server will generate a solution (if
 *  possible) before the timeout has elapsed.
 */
// const timeout = {}
/**
 *  Shipment model to solve.
 */
// const model = {}
/**
 *  By default, the solving mode is `DEFAULT_SOLVE` (0).
 */
// const solvingMode = {}
/**
 *  Search mode used to solve the request.
 */
// const searchMode = {}
/**
 *  Guide the optimization algorithm in finding a first solution that is
 *  similar to a previous solution.
 *  The model is constrained when the first solution is built.
 *  Any shipments not performed on a route are implicitly skipped in the first
 *  solution, but they may be performed in successive solutions.
 *  The solution must satisfy some basic validity assumptions:
 *    * for all routes, `vehicle_index` must be in range and not be duplicated.
 *    * for all visits, `shipment_index` and `visit_request_index` must be
 *      in range.
 *    * a shipment may only be referenced on one route.
 *    * the pickup of a pickup-delivery shipment must be performed before
 *      the delivery.
 *    * no more than one pickup alternative or delivery alternative of
 *      a shipment may be performed.
 *    * for all routes, times are increasing (i.e., `vehicle_start_time
 *      <= visits0.start_time <= visits1.start_time ...
 *      <= vehicle_end_time`).
 *    * a shipment may only be performed on a vehicle that is allowed. A
 *      vehicle is allowed if
 *      Shipment.allowed_vehicle_indices google.maps.routeoptimization.v1.Shipment.allowed_vehicle_indices
 *      is empty or its `vehicle_index` is included in
 *      Shipment.allowed_vehicle_indices google.maps.routeoptimization.v1.Shipment.allowed_vehicle_indices.
 *  If the injected solution is not feasible, a validation error is not
 *  necessarily returned and an error indicating infeasibility may be returned
 *  instead.
 */
// const injectedFirstSolutionRoutes = [1,2,3,4]
/**
 *  Constrain the optimization algorithm to find a final solution that is
 *  similar to a previous solution. For example, this may be used to freeze
 *  portions of routes which have already been completed or which are to be
 *  completed but must not be modified.
 *  If the injected solution is not feasible, a validation error is not
 *  necessarily returned and an error indicating infeasibility may be returned
 *  instead.
 */
// const injectedSolutionConstraint = {}
/**
 *  If non-empty, the given routes will be refreshed, without modifying their
 *  underlying sequence of visits or travel times: only other details will be
 *  updated. This does not solve the model.
 *  As of 2020/11, this only populates the polylines of non-empty routes and
 *  requires that `populate_polylines` is true.
 *  The `route_polyline` fields of the passed-in routes may be inconsistent
 *  with route `transitions`.
 *  This field must not be used together with `injected_first_solution_routes`
 *  or `injected_solution_constraint`.
 *  `Shipment.ignore` and `Vehicle.ignore` have no effect on the behavior.
 *  Polylines are still populated between all visits in all non-empty routes
 *  regardless of whether the related shipments or vehicles are ignored.
 */
// const refreshDetailsRoutes = [1,2,3,4]
/**
 *  If true:
 *    * uses
 *    ShipmentRoute.vehicle_label google.maps.routeoptimization.v1.ShipmentRoute.vehicle_label
 *    instead of `vehicle_index` to
 *      match routes in an injected solution with vehicles in the request;
 *      reuses the mapping of original
 *      ShipmentRoute.vehicle_index google.maps.routeoptimization.v1.ShipmentRoute.vehicle_index
 *      to new
 *      ShipmentRoute.vehicle_index google.maps.routeoptimization.v1.ShipmentRoute.vehicle_index
 *      to update
 *      ConstraintRelaxation.vehicle_indices google.maps.routeoptimization.v1.InjectedSolutionConstraint.ConstraintRelaxation.vehicle_indices
 *      if non-empty, but the mapping must be unambiguous (i.e., multiple
 *      `ShipmentRoute`s must not share the same original `vehicle_index`).
 *    * uses
 *    ShipmentRoute.Visit.shipment_label google.maps.routeoptimization.v1.ShipmentRoute.Visit.shipment_label
 *    instead of `shipment_index`
 *      to match visits in an injected solution with shipments in the request;
 *    * uses
 *    SkippedShipment.label google.maps.routeoptimization.v1.SkippedShipment.label
 *    instead of
 *    SkippedShipment.index google.maps.routeoptimization.v1.SkippedShipment.index
 *    to
 *      match skipped shipments in the injected solution with request
 *      shipments.
 *  This interpretation applies to the `injected_first_solution_routes`,
 *  `injected_solution_constraint`, and `refresh_details_routes` fields.
 *  It can be used when shipment or vehicle indices in the request have
 *  changed since the solution was created, perhaps because shipments or
 *  vehicles have been removed from or added to the request.
 *  If true, labels in the following categories must appear at most once in
 *  their category:
 *    * Vehicle.label google.maps.routeoptimization.v1.Vehicle.label  in the
 *    request;
 *    * Shipment.label google.maps.routeoptimization.v1.Shipment.label  in
 *    the request;
 *    * ShipmentRoute.vehicle_label google.maps.routeoptimization.v1.ShipmentRoute.vehicle_label  in the injected solution;
 *    * SkippedShipment.label google.maps.routeoptimization.v1.SkippedShipment.label  and ShipmentRoute.Visit.shipment_label google.maps.routeoptimization.v1.ShipmentRoute.Visit.shipment_label  in
 *      the injected solution (except pickup/delivery visit pairs, whose
 *      `shipment_label` must appear twice).
 *  If a `vehicle_label` in the injected solution does not correspond to a
 *  request vehicle, the corresponding route is removed from the solution
 *  along with its visits. If a `shipment_label` in the injected solution does
 *  not correspond to a request shipment, the corresponding visit is removed
 *  from the solution. If a
 *  SkippedShipment.label google.maps.routeoptimization.v1.SkippedShipment.label
 *  in the injected solution does not correspond to a request shipment, the
 *  `SkippedShipment` is removed from the solution.
 *  Removing route visits or entire routes from an injected solution may
 *  have an effect on the implied constraints, which may lead to change in
 *  solution, validation errors, or infeasibility.
 *  NOTE: The caller must ensure that each
 *  Vehicle.label google.maps.routeoptimization.v1.Vehicle.label  (resp.
 *  Shipment.label google.maps.routeoptimization.v1.Shipment.label) uniquely
 *  identifies a vehicle (resp. shipment) entity used across the two relevant
 *  requests: the past request that produced the `OptimizeToursResponse` used
 *  in the injected solution and the current request that includes the injected
 *  solution. The uniqueness checks described above are not enough to guarantee
 *  this requirement.
 */
// const interpretInjectedSolutionsUsingLabels = true
/**
 *  Consider traffic estimation in calculating `ShipmentRoute` fields
 *  Transition.travel_duration google.maps.routeoptimization.v1.ShipmentRoute.Transition.travel_duration,
 *  Visit.start_time google.maps.routeoptimization.v1.ShipmentRoute.Visit.start_time,
 *  and `vehicle_end_time`; in setting the
 *  ShipmentRoute.has_traffic_infeasibilities google.maps.routeoptimization.v1.ShipmentRoute.has_traffic_infeasibilities
 *  field, and in calculating the
 *  OptimizeToursResponse.total_cost google.maps.routeoptimization.v1.OptimizeToursResponse.total_cost
 *  field.
 */
// const considerRoadTraffic = true
/**
 *  If true, polylines will be populated in response `ShipmentRoute`s.
 */
// const populatePolylines = true
/**
 *  If true, polylines will be populated in response
 *  ShipmentRoute.transitions google.maps.routeoptimization.v1.ShipmentRoute.transitions.
 */
// const populateTransitionPolylines = true
/**
 *  If this is set, then the request can have a deadline
 *  (see https://grpc.io/blog/deadlines) of up to 60 minutes.
 *  Otherwise, the maximum deadline is only 30 minutes.
 *  Note that long-lived requests have a significantly larger (but still small)
 *  risk of interruption.
 */
// const allowLargeDeadlineDespiteInterruptionRisk = true
/**
 *  If true, travel distances will be computed using geodesic distances instead
 *  of Google Maps distances, and travel times will be computed using geodesic
 *  distances with a speed defined by `geodesic_meters_per_second`.
 */
// const useGeodesicDistances = true
/**
 *  When `use_geodesic_distances` is true, this field must be set and defines
 *  the speed applied to compute travel times. Its value must be at least 1.0
 *  meters/seconds.
 */
// const geodesicMetersPerSecond = 1234
/**
 *  Truncates the number of validation errors returned. These errors are
 *  typically attached to an INVALID_ARGUMENT error payload as a BadRequest
 *  error detail (https://cloud.google.com/apis/design/errors#error_details),
 *  unless solving_mode=VALIDATE_ONLY: see the
 *  OptimizeToursResponse.validation_errors google.maps.routeoptimization.v1.OptimizeToursResponse.validation_errors
 *  field.
 *  This defaults to 100 and is capped at 10,000.
 */
// const maxValidationErrors = 1234
/**
 *  Label that may be used to identify this request, reported back in the
 *  OptimizeToursResponse.request_label google.maps.routeoptimization.v1.OptimizeToursResponse.request_label.
 */
// const label = 'abc123'

// Imports the Routeoptimization library
const {RouteOptimizationClient} = require(' @googlemaps/routeoptimization 
').v1;

// Instantiates a client
const routeoptimizationClient = new RouteOptimizationClient 
();

async function callOptimizeTours() {
  // Construct request
  const request = {
    parent,
    model,
  };

  // Run request
  const response = await routeoptimizationClient.optimizeTours(request);
  console.log(response);
}

callOptimizeTours();