mirror of https://github.com/TryGhost/Ghost.git
102 lines
3.1 KiB
JavaScript
102 lines
3.1 KiB
JavaScript
const downsize = require('downsize');
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const Promise = require('bluebird');
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const cheerio = require('cheerio');
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const RSS = require('rss');
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const urlUtils = require('../../../server/lib/url-utils');
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const urlService = require('../url');
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let generateFeed;
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let generateItem;
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let generateTags;
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generateTags = function generateTags(data) {
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if (data.tags) {
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return data.tags.reduce(function (tags, tag) {
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if (tag.visibility !== 'internal') {
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tags.push(tag.name);
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}
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return tags;
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}, []);
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}
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return [];
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};
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generateItem = function generateItem(post, secure) {
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const itemUrl = urlService.getUrlByResourceId(post.id, {secure, absolute: true});
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const htmlContent = cheerio.load(urlUtils.htmlRelativeToAbsolute(post.html, itemUrl, {secure}) || '', {decodeEntities: false});
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const item = {
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title: post.title,
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// @TODO: DRY this up with data/meta/index & other excerpt code
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description: post.custom_excerpt || post.meta_description || downsize(htmlContent.html(), {words: 50}),
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guid: post.id,
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url: itemUrl,
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date: post.published_at,
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categories: generateTags(post),
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author: post.primary_author ? post.primary_author.name : null,
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custom_elements: []
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};
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if (post.feature_image) {
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const imageUrl = urlUtils.urlFor('image', {image: post.feature_image, secure}, true);
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// Add a media content tag
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item.custom_elements.push({
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'media:content': {
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_attr: {
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url: imageUrl,
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medium: 'image'
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}
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}
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});
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// Also add the image to the content, because not all readers support media:content
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htmlContent('p').first().before('<img src="' + imageUrl + '" />');
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htmlContent('img').attr('alt', post.title);
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}
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item.custom_elements.push({
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'content:encoded': {
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_cdata: htmlContent.html()
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}
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});
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return item;
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};
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/**
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* Generate Feed
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*
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* Data is an object which contains the res.locals + results from fetching a collection, but without related data.
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*
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* @param {string} baseUrl
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* @param {{title, description, safeVersion, secure, posts}} data
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*/
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generateFeed = function generateFeed(baseUrl, data) {
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const {secure} = data;
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const feed = new RSS({
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title: data.title,
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description: data.description,
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generator: 'Ghost ' + data.safeVersion,
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feed_url: urlUtils.urlFor({relativeUrl: baseUrl, secure}, true),
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site_url: urlUtils.urlFor('home', {secure}, true),
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image_url: urlUtils.urlFor({relativeUrl: 'favicon.png'}, true),
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ttl: '60',
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custom_namespaces: {
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content: 'http://purl.org/rss/1.0/modules/content/',
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media: 'http://search.yahoo.com/mrss/'
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}
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});
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return data.posts.reduce((feedPromise, post) => {
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return feedPromise.then(() => {
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const item = generateItem(post, secure);
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return feed.item(item);
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});
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}, Promise.resolve()).then(() => {
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return feed.xml();
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});
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};
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module.exports = generateFeed;
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