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/*
* $Id: rssreader.js,v 1.5.2.3 2010/04/06 16:46:12 source Exp $
*
* This file is part of the OpenLink Software Ajax Toolkit (OAT) project.
*
* Copyright (C) 2005-2010 OpenLink Software
*
* See LICENSE file for details.
*/
/*
var r = new OAT.RSSReader(div, optObj);
r.display(xmlText);
CSS: .rss_reader .rss_body .rss_header
*/
OAT.RSSReader = function(div,options) {
var self = this;
this.options = {
limit: 10,
showTitle: true
}
for (var p in options) { self.options[p] = options[p]; }
this.div = $(div);
OAT.Dom.addClass(self.div,"rss_reader");
this.display = function(xmlText) {
var xml = OAT.Xml.removeDefaultNamespace(xmlText);
var xmlDoc = OAT.Xml.createXmlDoc(xml);
var data = {
title:"",
link:"",
items:[],
item:{
title:"",
link:"",
description:"",
date:""
}
}
var tn = xmlDoc.documentElement.tagName.toLowerCase();
if (tn == "rss") { self._parseRSS(xmlDoc,data); }
if (tn.match(/rdf/)) { self._parseRDF(xmlDoc,data); }
if (tn == "feed") { self._parseAtom(xmlDoc,data); }
OAT.Dom.clear(self.div);
if (self.options.showTitle) {
var title = OAT.Dom.create("h3",{className:"rss_header"});
var link = OAT.Dom.create("a");
link.href = data.link;
link.innerHTML = data.title;
OAT.Dom.append([title,link],[self.div,title]);
}
var body = OAT.Dom.create("ul",{className:"rss_body"});
var max = Math.min(data.items.length,self.options.limit);
for (var i=0;i<max;i++) {
var li = OAT.Dom.create("li");
var a = OAT.Dom.create("a");
a.href = data.items[i].link;
a.innerHTML = data.items[i].title;
OAT.Dom.append([li,a],[body,li]);
}
self.div.appendChild(body);
}
this._parseRSS = function(xmlDoc,result) {
var titleNode = OAT.Xml.xpath(xmlDoc,"//channel/title")[0];
var linkNode = OAT.Xml.xpath(xmlDoc,"//channel/link")[0];
result.title = OAT.Xml.textValue(titleNode);
result.link = OAT.Xml.textValue(linkNode);
var itemNodes = OAT.Xml.xpath(xmlDoc,"//item");
for (var i=0;i<itemNodes.length;i++) {
var itemNode = itemNodes[i];
var item = {};
for (var p in result.item) { item[p] = result.item[p]; }
var titleNode = itemNode.getElementsByTagName("title");
if (titleNode.length) { item.title = OAT.Xml.textValue(titleNode[0]); }
var linkNode = itemNode.getElementsByTagName("link");
if (linkNode.length) { item.link = OAT.Xml.textValue(linkNode[0]); }
var descNode = itemNode.getElementsByTagName("description");
if (descNode.length) { item.description = OAT.Xml.textValue(descNode[0]); }
var dateNode = itemNode.getElementsByTagName("pubDate");
if (dateNode.length) { item.date = OAT.Xml.textValue(dateNode[0]); }
result.items.push(item);
}
}
this._parseAtom = function(xmlDoc,result) {
var titleNode = OAT.Xml.xpath(xmlDoc,"//feed/title")[0];
var linkNode = OAT.Xml.xpath(xmlDoc,"//feed/link")[0];
result.title = OAT.Xml.textValue(titleNode);
result.link = linkNode.attributes.getNamedItem("href").nodeValue;
var itemNodes = OAT.Xml.xpath(xmlDoc,"//entry");
for (var i=0;i<itemNodes.length;i++) {
var itemNode = itemNodes[i];
var item = {};
for (var p in result.item) { item[p] = result.item[p]; }
var titleNode = itemNode.getElementsByTagName("title");
if (titleNode.length) { item.title = OAT.Xml.textValue(titleNode[0]); }
var linkNode = itemNode.getElementsByTagName("link");
if (linkNode.length) { item.link = linkNode[0].attributes.getNamedItem("href").nodeValue; }
var descNode = itemNode.getElementsByTagName("summary");
if (descNode.length) {
item.description = OAT.Xml.textValue(descNode[0]);
item.description = OAT.Xml.unescape(item.description);
}
var dateNode = itemNode.getElementsByTagName("published");
if (dateNode.length) { item.date = OAT.Xml.textValue(dateNode[0]); }
result.items.push(item);
}
}
this._parseRDF = function(xmlDoc,result) {
/* create resolver object */
var obj = {rdf:"http://www.w3.org/1999/02/22-rdf-syntax-ns#"};
var titleNode = OAT.Xml.xpath(xmlDoc,"//channel/title",obj)[0];
var linkNode = OAT.Xml.xpath(xmlDoc,"//channel/link",obj)[0];
result.title = OAT.Xml.textValue(titleNode);
result.link = OAT.Xml.textValue(linkNode);
var itemNodes = OAT.Xml.xpath(xmlDoc,"//item",obj);
for (var i=0;i<itemNodes.length;i++) {
var itemNode = itemNodes[i];
var item = {};
for (var p in result.item) { item[p] = result.item[p]; }
var titleNode = itemNode.getElementsByTagName("title");
if (titleNode.length) { item.title = OAT.Xml.textValue(titleNode[0]); }
var linkNode = itemNode.getElementsByTagName("link");
if (linkNode.length) { item.link = OAT.Xml.textValue(linkNode[0]); }
var descNode = itemNode.getElementsByTagName("description");
if (descNode.length) { item.description = OAT.Xml.textValue(descNode[0]); }
var dateNode = itemNode.getElementsByTagName("pubDate");
if (dateNode.length) { item.date = OAT.Xml.textValue(dateNode[0]); }
result.items.push(item);
}
}
}
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