alpha release

update v0.8.0

src/middlewares/queryHandler/followingHandler.ts

@@ -0,0 +1,65 @@
+import type { Request, Response } from 'express';
+import type { Twttr } from 'twtxt-lib';
+
+import {
+	generateEtag,
+	getQueryParameterArray,
+	getValueOrFirstEntry,
+} from '../../lib/utils.js';
+import { QueryParameters } from '../../types.js';
+import NodeCache from '@cacheable/node-cache';
+
+/**
+ *
+ * @param req
+ * @param res
+ * @param cache
+ * @param followingParameter
+ */
+export default function followingHandler(
+	req: Request,
+	res: Response,
+	cache: NodeCache<unknown>,
+	followingParameter: QueryParameters['following']
+) {
+	const followingsToMatch = getQueryParameterArray(
+		req.query[followingParameter]
+	);
+
+	const nicksToMatch = getQueryParameterArray(req.query.nick);
+	const urlsToMatch = getQueryParameterArray(req.query.url);
+
+	const searchTermsToMatch = [
+		...getQueryParameterArray(req.query.search),
+		...getQueryParameterArray(req.query.s),
+	];
+
+	const wantsJson =
+		req.is('json') ||
+		getValueOrFirstEntry(getQueryParameterArray(req.query.format)) === 'json';
+	if (wantsJson) res.set('content-type', 'application/json');
+	else res.set('content-type', 'text/plain');
+
+	const matchedFollowing = (cache.get('following') as Twttr[]).filter(
+		({ nick, url }) =>
+			(!followingsToMatch.length ||
+				(followingsToMatch.length === 1 && followingsToMatch[0] === '') ||
+				followingsToMatch.includes(nick) ||
+				followingsToMatch.includes(`@${nick}`) ||
+				followingsToMatch.includes(url)) &&
+			(!nicksToMatch.length ||
+				nicksToMatch.includes(nick) ||
+				nicksToMatch.includes(`@${nick}`)) &&
+			(!urlsToMatch.length || urlsToMatch.includes(url)) &&
+			(!searchTermsToMatch.length ||
+				searchTermsToMatch.some(
+					(term) => nick.includes(term) || url.includes(term)
+				))
+	);
+
+	const result = wantsJson
+		? JSON.stringify(matchedFollowing)
+		: matchedFollowing.map(({ nick, url }) => `@${nick} ${url}`).join('\n');
+
+	res.set('etag', generateEtag(result)).send(result);
+}