/*
*
* 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('lodash');
var grpc = require('../../../');
var routeguide = grpc.load(__dirname + '/route_guide.proto').routeguide;
var client = new routeguide.RouteGuide('localhost:50051',
grpc.Credentials.createInsecure());
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;