Minor reorganization of files

src/server/serve.ts

@@ -0,0 +1,73 @@
+import { join } from "jsr:@std/path";
+import { serveDir } from "jsr:@std/http/file-server";
+
+const scriptDir = import.meta.dirname ?? ".";
+const root = join(scriptDir, "..", "..");
+const port = Number(Deno.env.get("PORT") ?? "8080");
+
+function trimPathLine(line: string): string {
+	let s = line.trim();
+	if (!s || s.startsWith("#")) return "";
+	if ((s.startsWith('"') && s.endsWith('"')) || (s.startsWith("'") && s.endsWith("'"))) {
+		s = s.slice(1, -1);
+	}
+	return s.trim();
+}
+
+/** Optional one-line file in repo root: absolute path to `ChatRequest/Database.json`. */
+function readOptionalPathFile(): string | undefined {
+	try {
+		const pathFile = join(root, "chat-request-database.path");
+		const raw = Deno.readTextFileSync(pathFile);
+		for (const line of raw.split(/\r?\n/)) {
+			const p = trimPathLine(line);
+			if (p) return p;
+		}
+	} catch {
+		// missing or unreadable
+	}
+	return undefined;
+}
+
+const chatRequestDatabase =
+	Deno.env.get("CHAT_REQUEST_DATABASE")?.trim() || readOptionalPathFile();
+
+function isChatRequestFilename(pathname: string): boolean {
+	const base = pathname.split("/").pop() ?? "";
+	return base === "ChatRequest.json" || base === "database.json";
+}
+
+Deno.serve({ port, hostname: "127.0.0.1" }, async (req) => {
+	const url = new URL(req.url);
+	if (req.method === "GET" && chatRequestDatabase && isChatRequestFilename(url.pathname)) {
+		try {
+			let text = await Deno.readTextFile(chatRequestDatabase);
+			if (text.charCodeAt(0) === 0xfeff) text = text.slice(1);
+			return new Response(text, {
+				headers: {
+					"Content-Type": "application/json; charset=utf-8",
+					"Cache-Control": "no-store",
+				},
+			});
+		} catch (e) {
+			if (e instanceof Deno.errors.NotFound) {
+				console.error(`CHAT_REQUEST_DATABASE not found: ${chatRequestDatabase}`);
+				return new Response(null, { status: 404 });
+			}
+			const msg = e instanceof Error ? e.message : String(e);
+			console.error(`CHAT_REQUEST_DATABASE read error (${chatRequestDatabase}): ${msg}`);
+			return new Response(`Failed to read CHAT_REQUEST_DATABASE: ${msg}\n`, { status: 500 });
+		}
+	}
+	return serveDir(req, { fsRoot: root, showDirListing: false });
+});
+
+console.log(`Overlay: http://127.0.0.1:${port}/index.html`);
+if (chatRequestDatabase) {
+	console.log(`Chat request database file: ${chatRequestDatabase}`);
+} else {
+	console.warn(
+		"No database path: set CHAT_REQUEST_DATABASE or create chat-request-database.path (see README). " +
+			"Otherwise /ChatRequest.json is only served from this folder if the file exists.",
+	);
+}