feat(route/bbc): improve bbc (cn) (#21066)

Author: emdoe

lib/routes/bbc/utils.ts

@@ -0,0 +1,129 @@
+import { renderToString } from 'hono/jsx/dom/server';
+
+const processImageAttributes = ($img) => {
+    if (!$img.attr('src') && $img.attr('srcSet')) {
+        const srcs = $img.attr('srcSet').split(', ');
+        const lastSrc = srcs.at(-1);
+        if (lastSrc) {
+            $img.attr('src', lastSrc.split(' ')[0]);
+        }
+    }
+    $img.removeAttr('srcset').removeAttr('sizes');
+};
+
+const buildCleanFigure = (src, alt, figcaptionContent) =>
+    renderToString(
+        <figure>
+            <img src={src} alt={alt} referrerpolicy="no-referrer" />
+            {figcaptionContent && <figcaption>{figcaptionContent}</figcaption>}
+        </figure>
+    );
+
+const cleanFigureElement = ($, figure) => {
+    const $figure = $(figure);
+    const $img = $figure.find('img');
+
+    if ($img.length === 0) {
+        return;
+    }
+
+    processImageAttributes($img);
+
+    let sourceText = '';
+    let captionText = '';
+
+    // extract image source: (simp chinese/trad chinese)
+    const $sourceP = $figure.find('p[class*="css-"]').first();
+    if ($sourceP.length > 0) {
+        const sourceSpans = $sourceP.find('span');
+        if (sourceSpans.length >= 2) {
+            sourceText = sourceSpans.eq(1).text().trim();
+        }
+    }
+
+    let $figcaption = $figure.find('figcaption');
+
+    // english version
+    if ($figcaption.length === 0) {
+        const $next = $figure.next();
+        if ($next.length > 0) {
+            $figcaption = $next.find('figcaption');
+            // if found, remove the sibling div after extracting caption
+            if ($figcaption.length > 0) {
+                $next.remove();
+            }
+        }
+    }
+
+    if ($figcaption.length > 0) {
+        // try to find caption in specific elements, excluding visually-hidden labels
+        const $captionParagraph = $figcaption.find('[data-testid="caption-paragraph"]');
+
+        if ($captionParagraph.length > 0) {
+            captionText = $captionParagraph.text().trim();
+        } else {
+            // remove visually-hidden elements (like "Image caption, " labels)
+            const $figcaptionClone = $figcaption.clone();
+            $figcaptionClone.find('.visually-hidden, [class*="VisuallyHidden"]').remove();
+            captionText = $figcaptionClone.text().trim();
+        }
+    }
+
+    const parts = [sourceText, captionText].filter(Boolean);
+    const figcaptionContent = parts.join(' / ');
+
+    $figure.replaceWith(buildCleanFigure($img.attr('src'), $img.attr('alt') || '', figcaptionContent));
+};
+
+const ProcessFeed = ($) => {
+    // by default treat it as a hybrid news with video and story-body__inner
+    let content = $('#main-content article');
+
+    if (content.length === 0) {
+        // it's a video news with video and story-body
+        content = $('div.story-body');
+    }
+
+    if (content.length === 0) {
+        // chinese version has different structure
+        content = $('main[role="main"]');
+    }
+
+    // remove useless DOMs
+    content.find('header, section, [data-testid="bbc-logo-wrapper"]').remove();
+
+    // remove article title as it's already in RSS item title
+    content.find('h1').remove();
+
+    content.find('noscript').each((i, e) => {
+        $(e).parent().html($(e).html());
+    });
+
+    // clean up figure elements with images
+    content.find('figure').each((i, figure) => cleanFigureElement($, figure));
+
+    // handle standalone images with figcaption siblings (English version)
+    content
+        .find('img')
+        .not('figure img')
+        .each((i, img) => {
+            const $img = $(img);
+            processImageAttributes($img);
+
+            // check for figcaption sibling
+            const $next = $img.next();
+            if ($next.length > 0 && $next.find('figcaption').length > 0) {
+                const captionText = $next.find('figcaption').first().text().trim();
+                if (captionText) {
+                    $img.replaceWith(buildCleanFigure($img.attr('src'), $img.attr('alt') || '', captionText));
+                    $next.remove();
+                }
+            }
+        });
+
+    content.find('[data-component="media-block"] figcaption').prepend('<span>View video in browser: </span>');
+
+    return content.html();
+};
+
+export default { ProcessFeed };