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node-red-nodes/hardware/physical-web/physical-web.js

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/**
* Copyright 2015 IBM Corp.
*
* 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.
**/
module.exports = function(RED) {
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"use strict";
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var eddystoneBeacon = require('eddystone-beacon');
var EddystoneBeaconScanner = require('eddystone-beacon-scanner');
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function Beacon(n){
RED.nodes.createNode(this,n);
var node = this;
node.power = n.power;
node.period = n.period;
node.url = n.url;
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node.options = {
txPowerLevel: node.power,
tlmPeriod: node.period,
tlmCount: 2
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}
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if (node.url) {
try {
eddystoneBeacon.advertiseUrl(node.url, node.options);
} catch(e){
node.error('Error setting beacon URL', e);
}
}
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node.on('input', function(msg){
try {
eddystoneBeacon.advertiseUrl(msg.payload, node.options);
} catch(e){
node.error('error updating beacon URL', e);
}
});
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node.on('close', function(done){
try {
eddystoneBeacon.stop();
done();
} catch(e){
node.error('error shuttingdown beacon', e);
}
});
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}
RED.nodes.registerType("PhysicalWeb out", Beacon);
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function Scanner(n){
RED.nodes.createNode(this,n);
var node = this;
node.topic = n.topic;
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function onFound(beacon) {
node.send({
topic: node.topic,
payload: beacon
});
}
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EddystoneBeaconScanner.on('found', onFound);
EddystoneBeaconScanner.on('updated', onFound);
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node.on('close',function(done){
EddystoneBeaconScanner.removeListener('found', onFound);
EddystoneBeaconScanner.removeListener('updated', onFound);
done();
});
}
RED.nodes.registerType("PhysicalWeb in", Scanner);
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};