route_guide_server.js

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var fs = require('fs');
var parseArgs = require('minimist');
var path = require('path');
var _ = require('underscore');
var grpc = require('..');
var examples = grpc.load(__dirname + '/route_guide.proto').examples;

var Server = grpc.buildServer([examples.RouteGuide.service]);

var COORD_FACTOR = 1e7;

/**
 * For simplicity, a point is a record type that looks like
 * {latitude: number, longitude: number}, and a feature is a record type that
 * looks like {name: string, location: point}. feature objects with name===''
 * are points with no feature.
 */

/**
 * List of feature objects at points that have been requested so far.
 */
var feature_list = [];

/**
 * Get a feature object at the given point, or creates one if it does not exist.
 * @param {point} point The point to check
 * @return {feature} The feature object at the point. Note that an empty name
 *     indicates no feature
 */
function checkFeature(point) {
  var feature;
  // Check if there is already a feature object for the given point
  for (var i = 0; i < feature_list.length; i++) {
    feature = feature_list[i];
    if (feature.location.latitude === point.latitude &&
        feature.location.longitude === point.longitude) {
      return feature;
    }
  }
  var name = '';
  feature = {