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