diff options
Diffstat (limited to 'js/rss-feed-preview.js')
| -rw-r--r-- | js/rss-feed-preview.js | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/js/rss-feed-preview.js b/js/rss-feed-preview.js new file mode 100644 index 0000000..8d74709 --- /dev/null +++ b/js/rss-feed-preview.js @@ -0,0 +1,223 @@ +/** + * RSS/Atom Feed Preview for Links Table + */ + +(function() { + const existingPreviews = document.querySelectorAll('#rss-feed-preview'); + existingPreviews.forEach(el => el.remove()); + + const CORS_PROXY = 'https://cors-anywhere.mayx.eu.org/?'; + + const createPreviewElement = () => { + const existingPreview = document.getElementById('rss-feed-preview'); + if (existingPreview) { + return existingPreview; + } + + const previewEl = document.createElement('div'); + previewEl.id = 'rss-feed-preview'; + previewEl.style.cssText = ` + position: fixed; + display: none; + width: 300px; + max-height: 400px; + overflow-y: auto; + background-color: white; + border: 1px solid #ccc; + border-radius: 5px; + padding: 10px; + box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); + z-index: 1000; + font-size: 14px; + line-height: 1.4; + `; + document.body.appendChild(previewEl); + return previewEl; + }; + + const parseRSS = (xmlText) => { + const parser = new DOMParser(); + const xml = parser.parseFromString(xmlText, 'text/xml'); + + const rssItems = xml.querySelectorAll('item'); + if (rssItems.length > 0) { + return Array.from(rssItems).slice(0, 5).map(item => { + return { + title: item.querySelector('title')?.textContent || 'No title', + date: item.querySelector('pubDate')?.textContent || 'No date', + }; + }); + } + + const atomItems = xml.querySelectorAll('entry'); + if (atomItems.length > 0) { + return Array.from(atomItems).slice(0, 5).map(item => { + return { + title: item.querySelector('title')?.textContent || 'No title', + date: item.querySelector('updated')?.textContent || 'No date', + }; + }); + } + + return null; + }; + + const checkFeed = async (url) => { + try { + const response = await fetch(CORS_PROXY + url); + if (!response.ok) { + return null; + } + + const text = await response.text(); + return parseRSS(text); + } catch (error) { + return null; + } + }; + + const findFeedUrl = async (siteUrl, linkElement) => { + if (linkElement && linkElement.hasAttribute('data-feed')) { + const dataFeedUrl = linkElement.getAttribute('data-feed'); + if (dataFeedUrl) { + const feedItems = await checkFeed(dataFeedUrl); + if (feedItems) { + return { url: dataFeedUrl, items: feedItems }; + } + } + } + + return null; + }; + + const renderFeedItems = (previewEl, items, siteName) => { + if (!items || items.length === 0) { + previewEl.innerHTML = '<p>No feed items found.</p>'; + return; + } + + let html = `<h3>Latest from ${siteName}</h3><ul style="list-style: none; padding: 0; margin: 0;">`; + + items.forEach(item => { + html += ` + <li style="margin-bottom: 10px; padding-bottom: 10px; border-bottom: 1px solid #eee;"> + <div style="color: #24292e; font-weight: bold;"> + ${item.title} + </div> + <div style="color: #586069; font-size: 12px; margin: 3px 0;"> + ${new Date(item.date).toLocaleDateString()} + </div> + </li> + `; + }); + + html += '</ul>'; + previewEl.innerHTML = html; + }; + + const positionPreview = (previewEl, event) => { + const viewportWidth = window.innerWidth; + const viewportHeight = window.innerHeight; + + let left = event.clientX + 20; + let top = event.clientY + 20; + + const rect = previewEl.getBoundingClientRect(); + + if (left + rect.width > viewportWidth) { + left = event.clientX - rect.width - 20; + } + + if (top + rect.height > viewportHeight) { + top = event.clientY - rect.height - 20; + } + + left = Math.max(10, left); + top = Math.max(10, top); + + previewEl.style.left = `${left}px`; + previewEl.style.top = `${top}px`; + }; + + const initFeedPreview = () => { + const previewEl = createPreviewElement(); + + const tableLinks = document.querySelectorAll('main table tbody tr td a'); + + const feedCache = {}; + + let currentLink = null; + let loadingTimeout = null; + + tableLinks.forEach(link => { + link.addEventListener('mouseenter', async (event) => { + currentLink = link; + const url = link.getAttribute('href'); + const siteName = link.textContent; + + previewEl.innerHTML = '<p>Checking for RSS/Atom feed...</p>'; + previewEl.style.display = 'block'; + positionPreview(previewEl, event); + + if (loadingTimeout) { + clearTimeout(loadingTimeout); + } + + loadingTimeout = setTimeout(async () => { + if (feedCache[url]) { + renderFeedItems(previewEl, feedCache[url].items, siteName); + positionPreview(previewEl, event); // Reposition after content is loaded + return; + } + + const feedData = await findFeedUrl(url, link); + + if (currentLink === link) { + if (feedData) { + feedCache[url] = feedData; + renderFeedItems(previewEl, feedData.items, siteName); + positionPreview(previewEl, event); // Reposition after content is loaded + } else { + previewEl.style.display = 'none'; + } + } + }, 300); + }); + + link.addEventListener('mousemove', (event) => { + if (previewEl.style.display === 'block') { + window.requestAnimationFrame(() => { + positionPreview(previewEl, event); + }); + } + }); + + link.addEventListener('mouseleave', () => { + if (loadingTimeout) { + clearTimeout(loadingTimeout); + loadingTimeout = null; + } + + currentLink = null; + previewEl.style.display = 'none'; + }); + }); + + document.addEventListener('click', (event) => { + if (!previewEl.contains(event.target)) { + previewEl.style.display = 'none'; + } + }); + }; + + if (!window.rssFeedPreviewInitialized) { + window.rssFeedPreviewInitialized = true; + + if (document.readyState === 'loading') { + document.addEventListener('DOMContentLoaded', initFeedPreview); + } else { + initFeedPreview(); + } + } + })(); +
\ No newline at end of file |