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/**
* 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.
**/
module.exports = function(RED) {
"use strict";
var FeedParser = require("feedparser");
var request = require("request");
function FeedParseNode(n) {
RED.nodes.createNode(this,n);
this.url = n.url;
this.interval = (parseInt(n.interval)||15)*60000;
var node = this;
this.interval_id = null;
this.seen = {};
if (this.url !== "") {
var getFeed = function() {
request(node.url,function(err) {
if (err) node.error(err);
})
.pipe(new FeedParser({feedurl:node.url}))
.on('error', function(error) {
node.error(error);
})
.on('meta', function (meta) {})
.on('readable', function () {
var stream = this, article;
while (article = stream.read()) {
if (!(article.guid in node.seen) || ( node.seen[article.guid] != 0 && node.seen[article.guid] != article.date.getTime())) {
node.seen[article.guid] = article.date?article.date.getTime():0;
var msg = {
topic:article.origlink||article.link,
payload: article.description,
article: article
};
node.send(msg);
}
}
})
.on('end', function () {
});
};
this.interval_id = setInterval(getFeed,node.interval);
getFeed();
} else {
this.error("Invalid url");
}
}
RED.nodes.registerType("feedparse",FeedParseNode);
FeedParseNode.prototype.close = function() {
if (this.interval_id != null) {
clearInterval(this.interval_id);
}
}
}
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