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node-red/nodes/io/23-watch.js

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2013-09-05 16:02:48 +02:00
/**
* Copyright 2013 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.
**/
var RED = require("../../red/red");
var notify = require("fs.notify");
function WatchNode(n) {
RED.nodes.createNode(this,n);
this.files = n.files.split(",");
for (var f in this.files) {
this.files[f] = this.files[f].trim();
}
var node = this;
var notifications = new notify(this.files);
notifications.on('change', function (file) {
node.log('file changed '+file);
var msg = { payload: file, topic: JSON.stringify(node.files) };
node.send(msg);
});
this._close = function() {
notifications.close();
}
}
RED.nodes.registerType("watch",WatchNode);
WatchNode.prototype.close = function() {
this._close();
}