96 lines
3.0 KiB
JavaScript
96 lines
3.0 KiB
JavaScript
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var index = require("./index.js"),
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DomHandler = index.DomHandler,
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DomUtils = index.DomUtils;
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//TODO: make this a streamable handler
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function FeedHandler(callback, options){
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this.init(callback, options);
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}
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require("util").inherits(FeedHandler, DomHandler);
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FeedHandler.prototype.init = DomHandler;
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function getElements(what, where){
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return DomUtils.getElementsByTagName(what, where, true);
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}
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function getOneElement(what, where){
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return DomUtils.getElementsByTagName(what, where, true, 1)[0];
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}
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function fetch(what, where, recurse){
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return DomUtils.getText(
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DomUtils.getElementsByTagName(what, where, recurse, 1)
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).trim();
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}
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function addConditionally(obj, prop, what, where, recurse){
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var tmp = fetch(what, where, recurse);
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if(tmp) obj[prop] = tmp;
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}
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var isValidFeed = function(value){
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return value === "rss" || value === "feed" || value === "rdf:RDF";
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};
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FeedHandler.prototype.onend = function(){
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var feed = {},
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feedRoot = getOneElement(isValidFeed, this.dom),
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tmp, childs;
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if(feedRoot){
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if(feedRoot.name === "feed"){
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childs = feedRoot.children;
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feed.type = "atom";
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addConditionally(feed, "id", "id", childs);
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addConditionally(feed, "title", "title", childs);
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if((tmp = getOneElement("link", childs)) && (tmp = tmp.attribs) && (tmp = tmp.href)) feed.link = tmp;
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addConditionally(feed, "description", "subtitle", childs);
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if((tmp = fetch("updated", childs))) feed.updated = new Date(tmp);
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addConditionally(feed, "author", "email", childs, true);
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feed.items = getElements("entry", childs).map(function(item){
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var entry = {}, tmp;
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item = item.children;
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addConditionally(entry, "id", "id", item);
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addConditionally(entry, "title", "title", item);
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if((tmp = getOneElement("link", item)) && (tmp = tmp.attribs) && (tmp = tmp.href)) entry.link = tmp;
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if((tmp = fetch("summary", item) || fetch("content", item))) entry.description = tmp;
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if((tmp = fetch("updated", item))) entry.pubDate = new Date(tmp);
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return entry;
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});
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} else {
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childs = getOneElement("channel", feedRoot.children).children;
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feed.type = feedRoot.name.substr(0, 3);
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feed.id = "";
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addConditionally(feed, "title", "title", childs);
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addConditionally(feed, "link", "link", childs);
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addConditionally(feed, "description", "description", childs);
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if((tmp = fetch("lastBuildDate", childs))) feed.updated = new Date(tmp);
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addConditionally(feed, "author", "managingEditor", childs, true);
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feed.items = getElements("item", feedRoot.children).map(function(item){
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var entry = {}, tmp;
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item = item.children;
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addConditionally(entry, "id", "guid", item);
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addConditionally(entry, "title", "title", item);
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addConditionally(entry, "link", "link", item);
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addConditionally(entry, "description", "description", item);
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if((tmp = fetch("pubDate", item))) entry.pubDate = new Date(tmp);
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return entry;
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});
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}
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}
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this.dom = feed;
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DomHandler.prototype._handleCallback.call(
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this, feedRoot ? null : Error("couldn't find root of feed")
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);
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};
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module.exports = FeedHandler;
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