mock-sensor.js

// Copyright 2016 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// This mock sensor implementation triggers an event with some data every once in a while

// Return a random integer between 0 and @upperLimit
function randomInteger( upperLimit ) {
	return Math.round( Math.random() * upperLimit );
}

var _ = {
	extend: require( "lodash.assignin" ),
	bind: require( "lodash.bind" )
};

var possibleStrings = [
		"Helsinki",
		"Espoo",
		"Tampere",
		"Oulu",
		"Mikkeli",
		"Ii"
	];

var MockSensor = function MockSensor() {
	function trigger() {
		this.emit( "change", this.currentData() );
		setTimeout( _.bind( trigger, this ), randomInteger( 1000 ) + 1000 );
	}
	if ( !this._isMockSensor ) {
		return new MockSensor();
	}
	setTimeout( _.bind( trigger, this ), randomInteger( 1000 ) + 1000 );
};

require( "util" ).inherits( MockSensor, require( "events" ).EventEmitter );

_.extend( MockSensor.prototype, {
	_isMockSensor: true,
	currentData: function() {
		return {
			someValue: Math.round( Math.random() * 42 ),
			someOtherValue: possibleStrings[ randomInteger( possibleStrings.length - 1 ) ]
		};
	}
} );

module.exports = MockSensor;