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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getFeed = void 0;
var stringify_1 = require("./stringify");
var legacy_1 = require("./legacy");
/**
* Get the feed object from the root of a DOM tree.
*
* @param doc - The DOM to to extract the feed from.
* @returns The feed.
*/
function getFeed(doc) {
var feedRoot = getOneElement(isValidFeed, doc);
return !feedRoot
? null
: feedRoot.name === "feed"
? getAtomFeed(feedRoot)
: getRssFeed(feedRoot);
}
exports.getFeed = getFeed;
/**
* Parse an Atom feed.
*
* @param feedRoot The root of the feed.
* @returns The parsed feed.
*/
function getAtomFeed(feedRoot) {
var _a;
var childs = feedRoot.children;
var feed = {
type: "atom",
items: (0, legacy_1.getElementsByTagName)("entry", childs).map(function (item) {
var _a;
var children = item.children;
var entry = { media: getMediaElements(children) };
addConditionally(entry, "id", "id", children);
addConditionally(entry, "title", "title", children);
var href = (_a = getOneElement("link", children)) === null || _a === void 0 ? void 0 : _a.attribs.href;
if (href) {
entry.link = href;
}
var description = fetch("summary", children) || fetch("content", children);
if (description) {
entry.description = description;
}
var pubDate = fetch("updated", children);
if (pubDate) {
entry.pubDate = new Date(pubDate);
}
return entry;
}),
};
addConditionally(feed, "id", "id", childs);
addConditionally(feed, "title", "title", childs);
var href = (_a = getOneElement("link", childs)) === null || _a === void 0 ? void 0 : _a.attribs.href;
if (href) {
feed.link = href;
}
addConditionally(feed, "description", "subtitle", childs);
var updated = fetch("updated", childs);
if (updated) {
feed.updated = new Date(updated);
}
addConditionally(feed, "author", "email", childs, true);
return feed;
}
/**
* Parse a RSS feed.
*
* @param feedRoot The root of the feed.
* @returns The parsed feed.
*/
function getRssFeed(feedRoot) {
var _a, _b;
var childs = (_b = (_a = getOneElement("channel", feedRoot.children)) === null || _a === void 0 ? void 0 : _a.children) !== null && _b !== void 0 ? _b : [];
var feed = {
type: feedRoot.name.substr(0, 3),
id: "",
items: (0, legacy_1.getElementsByTagName)("item", feedRoot.children).map(function (item) {
var children = item.children;
var entry = { media: getMediaElements(children) };
addConditionally(entry, "id", "guid", children);
addConditionally(entry, "title", "title", children);
addConditionally(entry, "link", "link", children);
addConditionally(entry, "description", "description", children);
var pubDate = fetch("pubDate", children);
if (pubDate)
entry.pubDate = new Date(pubDate);
return entry;
}),
};
addConditionally(feed, "title", "title", childs);
addConditionally(feed, "link", "link", childs);
addConditionally(feed, "description", "description", childs);
var updated = fetch("lastBuildDate", childs);
if (updated) {
feed.updated = new Date(updated);
}
addConditionally(feed, "author", "managingEditor", childs, true);
return feed;
}
var MEDIA_KEYS_STRING = ["url", "type", "lang"];
var MEDIA_KEYS_INT = [
"fileSize",
"bitrate",
"framerate",
"samplingrate",
"channels",
"duration",
"height",
"width",
];
/**
* Get all media elements of a feed item.
*
* @param where Nodes to search in.
* @returns Media elements.
*/
function getMediaElements(where) {
return (0, legacy_1.getElementsByTagName)("media:content", where).map(function (elem) {
var attribs = elem.attribs;
var media = {
medium: attribs.medium,
isDefault: !!attribs.isDefault,
};
for (var _i = 0, MEDIA_KEYS_STRING_1 = MEDIA_KEYS_STRING; _i < MEDIA_KEYS_STRING_1.length; _i++) {
var attrib = MEDIA_KEYS_STRING_1[_i];
if (attribs[attrib]) {
media[attrib] = attribs[attrib];
}
}
for (var _a = 0, MEDIA_KEYS_INT_1 = MEDIA_KEYS_INT; _a < MEDIA_KEYS_INT_1.length; _a++) {
var attrib = MEDIA_KEYS_INT_1[_a];
if (attribs[attrib]) {
media[attrib] = parseInt(attribs[attrib], 10);
}
}
if (attribs.expression) {
media.expression =
attribs.expression;
}
return media;
});
}
/**
* Get one element by tag name.
*
* @param tagName Tag name to look for
* @param node Node to search in
* @returns The element or null
*/
function getOneElement(tagName, node) {
return (0, legacy_1.getElementsByTagName)(tagName, node, true, 1)[0];
}
/**
* Get the text content of an element with a certain tag name.
*
* @param tagName Tag name to look for.
* @param where Node to search in.
* @param recurse Whether to recurse into child nodes.
* @returns The text content of the element.
*/
function fetch(tagName, where, recurse) {
if (recurse === void 0) { recurse = false; }
return (0, stringify_1.textContent)((0, legacy_1.getElementsByTagName)(tagName, where, recurse, 1)).trim();
}
/**
* Adds a property to an object if it has a value.
*
* @param obj Object to be extended
* @param prop Property name
* @param tagName Tag name that contains the conditionally added property
* @param where Element to search for the property
* @param recurse Whether to recurse into child nodes.
*/
function addConditionally(obj, prop, tagName, where, recurse) {
if (recurse === void 0) { recurse = false; }
var val = fetch(tagName, where, recurse);
if (val)
obj[prop] = val;
}
/**
* Checks if an element is a feed root node.
*
* @param value The name of the element to check.
* @returns Whether an element is a feed root node.
*/
function isValidFeed(value) {
return value === "rss" || value === "feed" || value === "rdf:RDF";
}