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