294 lines
10 KiB
JavaScript
294 lines
10 KiB
JavaScript
const http = require('http');
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const https = require('https');
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function normalizeUpdateIntervalUnit(value) {
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const unit = String(value || '').trim().toLowerCase();
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return unit === 'seconds' ? 'seconds' : 'minutes';
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}
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async function fetchRssFeedsData(pool) {
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const [rssFeeds] = await pool.query(
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'SELECT id, name, feed_url, update_interval_value, update_interval_unit, item_limit, created_at, modified_at, created_by, modified_by FROM rss_feeds ORDER BY modified_at DESC, id DESC'
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);
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return { rssFeeds: rssFeeds };
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}
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async function fetchRssFeedById(pool, id) {
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const [rows] = await pool.query(
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'SELECT id, name, feed_url, update_interval_value, update_interval_unit, item_limit, created_at, modified_at, created_by, modified_by FROM rss_feeds WHERE id = ?',
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[id]
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);
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return rows[0] || null;
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}
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async function fetchRssFeedItemsByFeedId(pool, rssFeedId) {
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const [rows] = await pool.query(
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`SELECT id, rss_feed_id, position, item_json, created_at, modified_at
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FROM rss_feed_items
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WHERE rss_feed_id = ?
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ORDER BY position ASC, id ASC`,
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[rssFeedId]
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);
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return rows.map(function (row) {
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return normalizeRssFeedItem(row);
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});
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}
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function normalizeRssFeedItem(row) {
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let itemJson = null;
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if (row && row.item_json) {
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try {
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itemJson = JSON.parse(row.item_json);
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} catch (_error) {
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itemJson = null;
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}
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}
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return Object.assign({}, row || {}, itemJson || {}, {
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itemJson: itemJson
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});
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}
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async function loadUrlText(urlValue) {
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if (typeof fetch === 'function') {
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const response = await fetch(urlValue, {
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headers: {
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Accept: 'application/rss+xml, application/xml, text/xml;q=0.9, */*;q=0.8',
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'User-Agent': 'Pulse Signage RSS Reader'
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}
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});
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if (!response.ok) {
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throw new Error(`Unable to load RSS feed (${response.status}).`);
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}
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return await response.text();
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}
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return await new Promise(function (resolve, reject) {
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const url = new URL(urlValue);
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const transport = url.protocol === 'https:' ? https : http;
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const request = transport.get(url, {
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headers: {
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Accept: 'application/rss+xml, application/xml, text/xml;q=0.9, */*;q=0.8',
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'User-Agent': 'Pulse Signage RSS Reader'
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}
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}, function (response) {
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if (response.statusCode && response.statusCode >= 400) {
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reject(new Error(`Unable to load RSS feed (${response.statusCode}).`));
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response.resume();
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return;
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}
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response.setEncoding('utf8');
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let body = '';
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response.on('data', function (chunk) {
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body += chunk;
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});
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response.on('end', function () {
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resolve(body);
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});
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});
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request.on('error', reject);
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});
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}
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function decodeXmlEntities(value) {
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return String(value || '')
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.replace(/&/g, '&')
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.replace(/</g, '<')
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.replace(/>/g, '>')
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.replace(/"/g, '"')
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.replace(/'/g, "'")
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.replace(/'/g, "'");
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}
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function stripCdata(value) {
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return String(value || '').replace(/^<!\[CDATA\[|\]\]>$/g, '');
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}
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function escapeRegExp(value) {
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return String(value || '').replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
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}
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function extractXmlTag(content, tagName) {
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const safeTagName = escapeRegExp(tagName);
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const pattern = new RegExp(`<${safeTagName}(?:\\s[^>]*)?>([\\s\\S]*?)<\/${safeTagName}>`, 'i');
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const match = pattern.exec(content || '');
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if (!match) {
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return '';
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}
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return decodeXmlEntities(stripCdata(match[1]).trim());
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}
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function extractAtomLink(content) {
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const linkMatch = /<link\b[^>]*rel=["']alternate["'][^>]*href=["']([^"']+)["'][^>]*\/>/i.exec(content || '')
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|| /<link\b[^>]*href=["']([^"']+)["'][^>]*rel=["']alternate["'][^>]*\/>/i.exec(content || '')
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|| /<link\b[^>]*href=["']([^"']+)["'][^>]*>/i.exec(content || '');
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if (!linkMatch) {
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return '';
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}
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return decodeXmlEntities(String(linkMatch[1] || '').trim());
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}
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function parseRssItems(xmlText, itemLimit) {
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const normalizedXml = String(xmlText || '');
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const itemMatches = Array.from(normalizedXml.matchAll(/<item\b[\s\S]*?<\/item>|<entry\b[\s\S]*?<\/entry>/gi)).map(function (match) {
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return String(match[0] || '');
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});
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if (!itemMatches.length) {
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return [];
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}
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return itemMatches.slice(0, Math.max(1, Number(itemLimit) || 1)).map(function (itemXml, index) {
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const title = extractXmlTag(itemXml, 'title') || `Item ${index + 1}`;
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const link = extractXmlTag(itemXml, 'link') || extractAtomLink(itemXml);
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const pubDate = extractXmlTag(itemXml, 'pubDate') || extractXmlTag(itemXml, 'updated') || extractXmlTag(itemXml, 'dc:date');
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const description = extractXmlTag(itemXml, 'description') || extractXmlTag(itemXml, 'summary') || extractXmlTag(itemXml, 'content:encoded');
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const author = extractXmlTag(itemXml, 'author') || extractXmlTag(itemXml, 'dc:creator');
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const comments = extractXmlTag(itemXml, 'comments');
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const guidMatch = /<guid\b([^>]*)>([\s\S]*?)<\/guid>/i.exec(itemXml || '');
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const guid = guidMatch ? decodeXmlEntities(stripCdata(String(guidMatch[2] || '').trim())) : '';
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const guidIsPermaLinkMatch = guidMatch && /\bisPermaLink\s*=\s*(["']?)(true|false)\1/i.exec(String(guidMatch[1] || ''));
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const categories = Array.from(String(itemXml || '').matchAll(/<category\b([^>]*)>([\s\S]*?)<\/category>/gi)).map(function (match) {
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const categoryAttributes = String(match[1] || '');
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const categoryDomainMatch = /\bdomain\s*=\s*(["'])([^"']+)\1/i.exec(categoryAttributes);
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return {
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value: decodeXmlEntities(stripCdata(String(match[2] || '').trim())),
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domain: categoryDomainMatch ? decodeXmlEntities(String(categoryDomainMatch[2] || '').trim()) : ''
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};
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}).filter(function (category) {
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return Boolean(category.value);
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});
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const enclosureMatch = /<enclosure\b([^>]*)\/?>(?:\s*)/i.exec(itemXml || '');
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const enclosureUrlMatch = enclosureMatch ? /\burl\s*=\s*(["'])([^"']+)\1/i.exec(String(enclosureMatch[1] || '')) : null;
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const enclosureLengthMatch = enclosureMatch ? /\blength\s*=\s*(["'])([^"']+)\1/i.exec(String(enclosureMatch[1] || '')) : null;
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const enclosureTypeMatch = enclosureMatch ? /\btype\s*=\s*(["'])([^"']+)\1/i.exec(String(enclosureMatch[1] || '')) : null;
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const sourceMatch = /<source\b([^>]*)>([\s\S]*?)<\/source>/i.exec(itemXml || '');
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const sourceUrlMatch = sourceMatch ? /\burl\s*=\s*(["'])([^"']+)\1/i.exec(String(sourceMatch[1] || '')) : null;
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const parsedItem = {
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title: title,
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link: link,
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description: description,
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author: author,
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comments: comments,
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guid: guid,
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guidIsPermaLink: guidIsPermaLinkMatch ? String(guidIsPermaLinkMatch[2] || '').toLowerCase() === 'true' : null,
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pubDate: pubDate,
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categories: categories,
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enclosure: enclosureMatch ? {
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url: enclosureUrlMatch ? decodeXmlEntities(String(enclosureUrlMatch[2] || '').trim()) : '',
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length: enclosureLengthMatch ? Number(enclosureLengthMatch[2]) || null : null,
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type: enclosureTypeMatch ? decodeXmlEntities(String(enclosureTypeMatch[2] || '').trim()) : ''
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} : null,
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source: sourceMatch ? {
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title: decodeXmlEntities(stripCdata(String(sourceMatch[2] || '').trim())),
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url: sourceUrlMatch ? decodeXmlEntities(String(sourceUrlMatch[2] || '').trim()) : ''
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} : null,
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rawXml: itemXml
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};
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return parsedItem;
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});
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}
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async function fetchRssFeedItems(feedUrl, itemLimit) {
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const xmlText = await loadUrlText(feedUrl);
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return parseRssItems(xmlText, itemLimit);
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}
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async function replaceRssFeedItems(connection, rssFeedId, items) {
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const normalizedItems = Array.isArray(items) ? items : [];
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await connection.query('DELETE FROM rss_feed_items WHERE rss_feed_id = ?', [rssFeedId]);
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if (!normalizedItems.length) {
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return 0;
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}
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const insertValues = normalizedItems.map(function (item, index) {
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return [
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rssFeedId,
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index + 1,
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JSON.stringify(item || {})
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];
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});
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await connection.query(
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'INSERT INTO rss_feed_items (rss_feed_id, position, item_json) VALUES ?',
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[insertValues]
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);
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return insertValues.length;
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}
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function buildRssFeedPayload(req, existingRssFeed) {
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const fallback = existingRssFeed || {};
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const name = String(req.body.name || fallback.name || '').trim();
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const feedUrl = String(req.body.feed_url || req.body.feedUrl || fallback.feed_url || '').trim();
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const updateIntervalValue = Math.max(1, Number(req.body.update_interval_value || req.body.updateIntervalValue || fallback.update_interval_value || 60));
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const updateIntervalUnit = normalizeUpdateIntervalUnit(req.body.update_interval_unit || req.body.updateIntervalUnit || fallback.update_interval_unit || 'minutes');
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const itemLimit = Math.max(1, Number(req.body.item_limit || req.body.itemLimit || fallback.item_limit || 1));
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if (!name) {
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const error = new Error('RSS feed name is required.');
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error.statusCode = 400;
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throw error;
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}
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if (!feedUrl) {
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const error = new Error('RSS feed URL is required.');
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error.statusCode = 400;
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throw error;
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}
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let parsedUrl;
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try {
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parsedUrl = new URL(feedUrl);
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} catch (_error) {
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const error = new Error('Enter a valid RSS feed URL.');
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error.statusCode = 400;
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throw error;
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}
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if (parsedUrl.protocol !== 'http:' && parsedUrl.protocol !== 'https:') {
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const error = new Error('RSS feed URL must start with http or https.');
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error.statusCode = 400;
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throw error;
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}
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if (!Number.isFinite(updateIntervalValue)) {
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const error = new Error('Update interval must be a number.');
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error.statusCode = 400;
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throw error;
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}
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if (!Number.isFinite(itemLimit)) {
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const error = new Error('Item count must be a number.');
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error.statusCode = 400;
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throw error;
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}
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return {
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name: name,
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feedUrl: parsedUrl.toString(),
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updateIntervalValue: Math.floor(updateIntervalValue),
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updateIntervalUnit: updateIntervalUnit,
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itemLimit: Math.floor(itemLimit)
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};
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}
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module.exports = {
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fetchRssFeedsData,
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fetchRssFeedById,
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fetchRssFeedItemsByFeedId,
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normalizeRssFeedItem,
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buildRssFeedPayload,
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fetchRssFeedItems,
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replaceRssFeedItems
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}; |