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node-red/nodes/core/io/23-watch.js
2017-02-07 21:14:16 +00:00

93 lines
3.2 KiB
JavaScript

/**
* Copyright JS Foundation and other contributors, http://js.foundation
*
* 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) {
"use strict";
var Notify = require("fs.notify");
var fs = require("fs");
var sep = require("path").sep;
var path = require("path");
var getAllDirs = function (dir, filelist) {
filelist = filelist || [];
fs.readdirSync(dir).forEach(file => {
if (fs.statSync(path.join(dir, file)).isDirectory() ) {
filelist.push(path.join(dir, file));
getAllDirs(path.join(dir, file), filelist);
}
});
return filelist;
}
function WatchNode(n) {
RED.nodes.createNode(this,n);
this.recursive = n.recursive || false;
this.files = (n.files || "").split(",");
for (var f=0; f < this.files.length; f++) {
this.files[f] = this.files[f].trim();
}
this.p = (this.files.length === 1) ? this.files[0] : JSON.stringify(this.files);
var node = this;
if (node.recursive) {
for (var fi in node.files) {
if (node.files.hasOwnProperty(fi)) {
node.files = node.files.concat(getAllDirs( node.files[fi]));
}
}
}
var notifications = new Notify(node.files);
notifications.on('change', function (file, event, path) {
var stat;
try {
if (fs.statSync(path).isDirectory()) { path = path + sep + file; }
stat = fs.statSync(path);
} catch(e) { }
var type = "none";
var msg = { payload:path, topic:node.p, file:file };
if (stat) {
if (stat.isFile()) { type = "file"; msg.size = stat.size; }
else if (stat.isBlockDevice()) { type = "blockdevice"; }
else if (stat.isCharacterDevice()) { type = "characterdevice"; }
else if (stat.isSocket()) { type = "socket"; }
else if (stat.isFIFO()) { type = "fifo"; }
else if (stat.isDirectory()) {
type = "directory";
if (node.recursive) {
notifications.add([path]);
notifications.add(getAllDirs(path));
}
}
else { type = "n/a"; }
}
msg.type = type;
node.send(msg);
});
notifications.on('error', function (error, path) {
var msg = { payload:path };
node.error(error,msg);
});
this.close = function() {
notifications.close();
}
}
RED.nodes.registerType("watch",WatchNode);
}