feat: add 53ai/news route.

lib/routes/53ai/namespace.ts

@@ -0,0 +1,11 @@
+import type { Namespace } from '@/types';
+
+export const namespace: Namespace = {
+    name: '53ai',
+    url: '53ai.com',
+    description: `53AI是一个人工智能技术社区，致力于推动人工智能技术的发展和应用。`,
+
+    zh: {
+        name: '53AI',
+    },
+};

lib/routes/53ai/news.ts

@@ -0,0 +1,66 @@
+import { Route } from '@/types';
+import ofetch from '@/utils/ofetch';
+import { load } from 'cheerio';
+import { parseDate } from '@/utils/parse-date';
+
+export const route: Route = {
+    path: '/news',
+    name: '53AI - AI News Feed',
+    description: 'RSS feed for 53AI news articles from the last 3 days.',
+    maintainers: ['houzl'],
+    example: '/53ai/news',
+    handler: async () => {
+        const baseUrl = 'https://www.53ai.com';
+        const threeDaysAgo = new Date(Date.now() - 3 * 24 * 60 * 60 * 1000);
+
+        const fetchPage = async (page: number) => {
+            const url = page === 1 ? `${baseUrl}/news.html` : `${baseUrl}/news.html?page=${page}`;
+            const response = await ofetch(url);
+            const $ = load(response);
+            return $('.news .news-box .new-left ul.list li')
+                .toArray()
+                .map((element) => {
+                    const item = $(element);
+                    const a = item.find('a.item').first();
+                    const title = a.find('.title span').text();
+                    const href = a.attr('href');
+                    if (!href) {
+                        throw new Error('链接不存在');
+                    }
+                    const link = new URL(href, baseUrl).href;
+                    const desc = a.find('.desc').text().trim();
+                    const pubDate = parseDate(a.find('.release-date span').eq(1).text().trim());
+                    return {
+                        title,
+                        link,
+                        description: desc,
+                        pubDate,
+                    };
+                });
+        };
+        const fetchAllPages = async (page: number, accumulatedItems: NewsItem[] = []): Promise<NewsItem[]> => {
+            const pageItems: NewsItem[] = await fetchPage(page);
+            const newItems: NewsItem[] = [...accumulatedItems, ...pageItems];
+            const lastItem: NewsItem | undefined = pageItems.at(-1);
+
+            return pageItems.length === 0 || (lastItem && lastItem.pubDate < threeDaysAgo) ? newItems : fetchAllPages(page + 1, newItems);
+        };
+
+        const items = await fetchAllPages(1);
+
+        // 过滤掉超过3天的项目
+        const filteredItems = items.filter((item) => item.pubDate >= threeDaysAgo);
+
+        return {
+            title: '53AI - AI News Feed (Last 3 Days)',
+            link: `${baseUrl}/news.html`,
+            item: filteredItems,
+        };
+    },
+};
+
+interface NewsItem {
+    pubDate: Date;
+    title?: string;
+    content?: string;
+}