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+// Copyright 2015, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+var async = require('async');
+var fs = require('fs');
+var parseArgs = require('minimist');
+var path = require('path');
+var _ = require('underscore');
+var grpc = require('grpc');
+var examples = grpc.load(__dirname + '/route_guide.proto').examples;
+var client = new examples.RouteGuide('localhost:50051');
+
+var COORD_FACTOR = 1e7;
+
+/**
+ * Run the getFeature demo. Calls getFeature with a point known to have a
+ * feature and a point known not to have a feature.
+ * @param {function} callback Called when this demo is complete
+ */
+function runGetFeature(callback) {
+ var next = _.after(2, callback);
+ function featureCallback(error, feature) {
+ if (error) {
+ callback(error);
+ }
+ if (feature.name === '') {
+ console.log('Found no feature at ' +
+ feature.location.latitude/COORD_FACTOR + ', ' +
+ feature.location.longitude/COORD_FACTOR);
+ } else {
+ console.log('Found feature called "' + feature.name + '" at ' +
+ feature.location.latitude/COORD_FACTOR + ', ' +
+ feature.location.longitude/COORD_FACTOR);
+ }
+ next();
+ }
+ var point1 = {
+ latitude: 409146138,
+ longitude: -746188906
+ };
+ var point2 = {
+ latitude: 0,
+ longitude: 0
+ };
+ client.getFeature(point1, featureCallback);
+ client.getFeature(point2, featureCallback);
+}
+
+/**
+ * Run the listFeatures demo. Calls listFeatures with a rectangle containing all
+ * of the features in the pre-generated database. Prints each response as it
+ * comes in.
+ * @param {function} callback Called when this demo is complete
+ */
+function runListFeatures(callback) {
+ var rectangle = {
+ lo: {
+ latitude: 400000000,
+ longitude: -750000000
+ },
+ hi: {
+ latitude: 420000000,
+ longitude: -730000000
+ }
+ };
+ console.log('Looking for features between 40, -75 and 42, -73');
+ var call = client.listFeatures(rectangle);
+ call.on('data', function(feature) {
+ console.log('Found feature called "' + feature.name + '" at ' +
+ feature.location.latitude/COORD_FACTOR + ', ' +
+ feature.location.longitude/COORD_FACTOR);
+ });
+ call.on('end', callback);
+}
+
+/**
+ * Run the recordRoute demo. Sends several randomly chosen points from the
+ * pre-generated feature database with a variable delay in between. Prints the
+ * statistics when they are sent from the server.
+ * @param {function} callback Called when this demo is complete
+ */
+function runRecordRoute(callback) {
+ var argv = parseArgs(process.argv, {
+ string: 'db_path'
+ });
+ fs.readFile(path.resolve(argv.db_path), function(err, data) {
+ if (err) callback(err);
+ var feature_list = JSON.parse(data);
+
+ var num_points = 10;
+ var call = client.recordRoute(function(error, stats) {
+ if (error) {
+ callback(error);
+ }
+ console.log('Finished trip with', stats.point_count, 'points');
+ console.log('Passed', stats.feature_count, 'features');
+ console.log('Travelled', stats.distance, 'meters');
+ console.log('It took', stats.elapsed_time, 'seconds');
+ callback();
+ });
+ /**
+ * Constructs a function that asynchronously sends the given point and then
+ * delays sending its callback
+ * @param {number} lat The latitude to send
+ * @param {number} lng The longitude to send
+ * @return {function(function)} The function that sends the point
+ */
+ function pointSender(lat, lng) {
+ /**
+ * Sends the point, then calls the callback after a delay
+ * @param {function} callback Called when complete
+ */
+ return function(callback) {
+ console.log('Visiting point ' + lat/COORD_FACTOR + ', ' +
+ lng/COORD_FACTOR);
+ call.write({
+ latitude: lat,
+ longitude: lng
+ });
+ _.delay(callback, _.random(500, 1500));
+ };
+ }
+ var point_senders = [];
+ for (var i = 0; i < num_points; i++) {
+ var rand_point = feature_list[_.random(0, feature_list.length - 1)];
+ point_senders[i] = pointSender(rand_point.location.latitude,
+ rand_point.location.longitude);
+ }
+ async.series(point_senders, function() {
+ call.end();
+ });
+ });
+}
+
+/**
+ * Run the routeChat demo. Send some chat messages, and print any chat messages
+ * that are sent from the server.
+ * @param {function} callback Called when the demo is complete
+ */
+function runRouteChat(callback) {
+ var call = client.routeChat();
+ call.on('data', function(note) {
+ console.log('Got message "' + note.message + '" at ' +
+ note.location.latitude + ', ' + note.location.longitude);
+ });
+
+ call.on('end', callback);
+
+ var notes = [{
+ location: {
+ latitude: 0,
+ longitude: 0
+ },
+ message: 'First message'
+ }, {
+ location: {
+ latitude: 0,
+ longitude: 1
+ },
+ message: 'Second message'
+ }, {
+ location: {
+ latitude: 1,
+ longitude: 0
+ },
+ message: 'Third message'
+ }, {
+ location: {
+ latitude: 0,
+ longitude: 0
+ },
+ message: 'Fourth message'
+ }];
+ for (var i = 0; i < notes.length; i++) {
+ var note = notes[i];
+ console.log('Sending message "' + note.message + '" at ' +
+ note.location.latitude + ', ' + note.location.longitude);
+ call.write(note);
+ }
+ call.end();
+}
+
+/**
+ * Run all of the demos in order
+ */
+function main() {
+ async.series([
+ runGetFeature,
+ runListFeatures,
+ runRecordRoute,
+ runRouteChat
+ ]);
+}
+
+if (require.main === module) {
+ main();
+}
+
+exports.runGetFeature = runGetFeature;
+
+exports.runListFeatures = runListFeatures;
+
+exports.runRecordRoute = runRecordRoute;
+
+exports.runRouteChat = runRouteChat;