Initial Sheet Relay application

lib/request-log.js

@@ -0,0 +1,30 @@
+import { mkdir, readFile, writeFile } from 'node:fs/promises';
+import path from 'node:path';
+
+const logPath = path.join(process.cwd(), 'data', 'request-log.json');
+const maximumEntries = 500;
+
+async function loadEntries() {
+  try {
+    return JSON.parse(await readFile(logPath, 'utf8'));
+  } catch (error) {
+    if (error.code === 'ENOENT') return [];
+    throw error;
+  }
+}
+
+export async function recordRequest(entry) {
+  const entries = await loadEntries();
+  entries.push(entry);
+  await mkdir(path.dirname(logPath), { recursive: true });
+  await writeFile(logPath, `${JSON.stringify(entries.slice(-maximumEntries), null, 2)}\n`, { mode: 0o600 });
+}
+
+export async function recentRequests(limit = 50) {
+  return (await loadEntries()).slice(-limit).reverse();
+}
+
+export async function clearRequests() {
+  await mkdir(path.dirname(logPath), { recursive: true });
+  await writeFile(logPath, '[]\n', { mode: 0o600 });
+}