feat: add route for maven central (#20820)

* feat: add route for maven central

* fix: change sort api to Array#toSorted

* Update lib/routes/maven/central.ts

* fix: update url for maven namespace

* fix: use category to tag items

- remove custom query param
- add categories for route

* fix: ensure pubDate contained in data item

* fix: extract date regex into a constant for better readability

---------

lib/routes/maven/central.ts

@@ -0,0 +1,123 @@
+import { load } from 'cheerio';
+
+import type { Route } from '@/types';
+import ofetch from '@/utils/ofetch';
+import { parseDate } from '@/utils/parse-date';
+
+export const route: Route = {
+    path: '/central/:group/:artifact',
+    name: 'Maven Central Feed',
+    maintainers: ['chrisis58'],
+    description: 'Get the latest versions of a Maven artifact from Maven Central Repository.',
+    url: 'central.sonatype.com/',
+    categories: ['programming'],
+    parameters: {
+        group: {
+            description: 'The group ID of the Maven artifact (e.g., org.springframework)',
+        },
+        artifact: {
+            description: 'The artifact ID of the Maven artifact (e.g., spring-core)',
+        },
+    },
+    example: '/maven/central/org.springframework/spring-core',
+    radar: [
+        {
+            source: ['central.sonatype.com/artifact/:group/:artifact/:suffix', 'central.sonatype.com/artifact/:group/:artifact'],
+            target: '/maven/central/:group/:artifact',
+        },
+    ],
+    features: {
+        requireConfig: false,
+        requirePuppeteer: false,
+        antiCrawler: false,
+        supportRadar: true,
+        supportBT: false,
+        supportPodcast: false,
+        supportScihub: false,
+        nsfw: false,
+    },
+    handler,
+};
+
+/**
+ * Regex to identify unstable versions
+ * Handles cases with delimiters: 1.0.0-rc1, 2.0.0.M2, 6.0.0_preview
+ * Handles cases without delimiters: 5.0.0beta2, 7.0.0canary
+ * Handles secondary versions: 1.0.0-M6.1
+ */
+const UNSTABLE_VERSION_REGEX = /[-_.]?(rc|m|snapshot|alpha|beta|preview|canary)[.\d]*$/i;
+
+/**
+ * Regex to extract date in the format YYYY-MM-DD HH:mm (e.g., 2024-09-22 04:19)
+ */
+const DATE_REGEX = /(\d{4}-\d{2}-\d{2} \d{2}:\d{2})/;
+
+async function handler(ctx) {
+    const group = ctx.req.param('group');
+    const artifact = ctx.req.param('artifact');
+    const limit = ctx.req.query('limit') ? Number.parseInt(ctx.req.query('limit'), 10) : 15;
+
+    // (org.springframework, spring-core) -> org/springframework/spring-core
+    const identifier = `${group.replaceAll('.', '/')}/${artifact}`;
+
+    try {
+        const metadataUrl = `https://repo1.maven.org/maven2/${identifier}/maven-metadata.xml`;
+        const metaDataResponse = await ofetch(metadataUrl);
+
+        const $meta = load(metaDataResponse, { xmlMode: true });
+        const latestVersion = $meta('metadata > versioning > latest').text();
+
+        if (!latestVersion) {
+            throw new Error(`Not a valid component for ${group}:${artifact}: versions not found`);
+        }
+    } catch (error: any) {
+        if (error?.response?.status === 404) {
+            throw new Error(`Could not find component for ${group}:${artifact}: metadata not found`);
+        }
+        throw error;
+    }
+
+    const response = await ofetch(`https://repo1.maven.org/maven2/${identifier}/`);
+    const $ = load(response);
+
+    const items = $('pre#contents a')
+        .toArray()
+        .filter((element) => {
+            const href = $(element).attr('href') ?? '';
+            return href.endsWith('/') && href !== '../';
+        })
+        .map((element) => {
+            const href = $(element).attr('href') ?? '';
+            const version = href.replace('/', '');
+            const versionUrl = `https://central.sonatype.com/artifact/${group}/${artifact}/${version}`;
+
+            const rawText = element.nextSibling ? (element.nextSibling as any).nodeValue : '';
+
+            // Date format: 2024-09-22 04:19
+            const match = rawText.match(DATE_REGEX);
+            let pubDate: Date | undefined;
+            if (match) {
+                pubDate = parseDate(match[1], 'YYYY-MM-DD HH:mm');
+            }
+
+            const category = UNSTABLE_VERSION_REGEX.test(version) ? 'Unstable' : 'Stable';
+
+            return {
+                title: `Version ${version} of ${group}:${artifact}`,
+                link: versionUrl,
+                pubDate,
+                description: `Released version ${version} of ${group}:${artifact}.`,
+                category: [category],
+            };
+        })
+        .filter((item) => !!item && item.pubDate !== undefined)
+        .toSorted((a, b) => (b.pubDate?.getTime() ?? 0) - (a.pubDate?.getTime() ?? 0))
+        .slice(0, limit);
+
+    return {
+        title: `Maven Central - ${group}:${artifact}`,
+        link: `https://central.sonatype.com/artifact/${group}/${artifact}`,
+        description: `Versions of ${group}:${artifact} available on Maven Central.`,
+        item: items,
+    };
+}

lib/routes/maven/namespace.ts

@@ -0,0 +1,9 @@
+import type { Namespace } from '@/types';
+
+export const namespace: Namespace = {
+    name: 'Maven',
+    url: 'repo1.maven.org/maven2/',
+    categories: ['programming'],
+    description: "Apache Maven is a build tool for Java projects. Using a project object model (POM), Maven manages a project's compilation, testing, and documentation.",
+    lang: 'en',
+};