feat: implement Sleepy sleep diary

app/api/entries/[date]/route.ts

@@ -0,0 +1,28 @@
+import { NextResponse } from 'next/server';
+import { getEntry, saveEntry } from '@/lib/db';
+import type { SleepEntry } from '@/lib/sleep';
+
+export const runtime = 'nodejs';
+
+function isDate(value: string): boolean {
+  return /^\d{4}-\d{2}-\d{2}$/.test(value);
+}
+
+export async function GET(_: Request, { params }: { params: Promise<{ date: string }> }) {
+  const { date } = await params;
+  if (!isDate(date)) return NextResponse.json({ error: 'Некорректная дата' }, { status: 400 });
+
+  return NextResponse.json({ entry: getEntry(date) });
+}
+
+export async function PUT(request: Request, { params }: { params: Promise<{ date: string }> }) {
+  const { date } = await params;
+  if (!isDate(date)) return NextResponse.json({ error: 'Некорректная дата' }, { status: 400 });
+
+  const entry = await request.json() as SleepEntry;
+  if (entry.date !== date || entry.rating < 1 || entry.rating > 5 || entry.awakenings < 0) {
+    return NextResponse.json({ error: 'Проверьте заполненные значения' }, { status: 400 });
+  }
+
+  return NextResponse.json({ entry: saveEntry(entry) });
+}