Initial commit: spreewaldzeit + Dockerfile for Coolify (Next.js + Prisma/SQLite)

app/api/available-periods/[slug]/route.ts

@@ -0,0 +1,81 @@
+import { NextResponse } from "next/server";
+import { prisma } from "@/lib/db";
+
+export const dynamic = "force-dynamic";
+
+interface Period {
+  start: string;
+  end: string;
+  nights: number;
+}
+
+export async function GET(
+  _req: Request,
+  { params }: { params: { slug: string } }
+) {
+  const apartment = await prisma.apartment.findUnique({
+    where: { slug: params.slug },
+    select: { id: true },
+  });
+  if (!apartment) {
+    return NextResponse.json({ error: "not_found" }, { status: 404 });
+  }
+
+  const today = new Date();
+  today.setHours(0, 0, 0, 0);
+
+  const horizon = new Date(today);
+  horizon.setDate(horizon.getDate() + 180);
+
+  // Fetch all blocks that overlap the window
+  const rows = await prisma.block.findMany({
+    where: {
+      apartmentId: apartment.id,
+      startDate: { lt: horizon },
+      endDate: { gt: today },
+    },
+    select: { startDate: true, endDate: true },
+    orderBy: { startDate: "asc" },
+  });
+
+  const blocks = rows.map((b) => ({
+    from: new Date(b.startDate),
+    to: new Date(b.endDate),
+  }));
+
+  // Walk forward from tomorrow, find free 7-night windows
+  const DEFAULT_NIGHTS = 7;
+  const MAX_SUGGESTIONS = 8;
+  const suggestions: Period[] = [];
+
+  const cursor = new Date(today);
+  cursor.setDate(cursor.getDate() + 1); // start from tomorrow
+
+  while (cursor < horizon && suggestions.length < MAX_SUGGESTIONS) {
+    const tripEnd = new Date(cursor);
+    tripEnd.setDate(tripEnd.getDate() + DEFAULT_NIGHTS);
+
+    if (tripEnd > horizon) break;
+
+    // Find any block that overlaps [cursor, tripEnd)
+    const overlap = blocks.find((b) => cursor < b.to && tripEnd > b.from);
+
+    if (!overlap) {
+      suggestions.push({
+        start: cursor.toISOString().slice(0, 10),
+        end: tripEnd.toISOString().slice(0, 10),
+        nights: DEFAULT_NIGHTS,
+      });
+      // Jump forward: end of this trip + small gap
+      cursor.setDate(cursor.getDate() + DEFAULT_NIGHTS + 7);
+    } else {
+      // Jump past the blocking block
+      cursor.setTime(overlap.to.getTime());
+      cursor.setDate(cursor.getDate() + 1);
+    }
+  }
+
+  return NextResponse.json({ periods: suggestions }, {
+    headers: { "Cache-Control": "no-store" },
+  });
+}