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cbf533d90b
Uniform stock management for healthcare linen rooms: the coordinator app, the phone counter and the staff app, for your own server. Built from 440e645 on 2026-09-13. Licensed under the Functional Source License (FSL-1.1-ALv2).
38 lines
2.1 KiB
TypeScript
38 lines
2.1 KiB
TypeScript
import { NextRequest, NextResponse } from "next/server";
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import { prisma } from "@/lib/db";
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import { currentUser } from "@/lib/session";
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import { currentStaff } from "@/lib/staffsession";
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export const dynamic = "force-dynamic";
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/* "Has anything changed?", answered in one integer.
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*
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* Every screen in the product already knows how to reload itself — a mutation ends in
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* router.refresh(). What it could not know was that somebody ELSE had changed something, so a
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* phone left open on a ward showed whatever the catalogue looked like when it was opened, and a
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* coordinator adding a garment at the desk had to tell the counter to pull down to refresh.
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*
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* The obvious fix — poll the snapshot and diff it — is the expensive one: that is the facility's
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* catalogue, staff register, stock and history, re-read on a timer by every open device to learn,
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* almost always, that nothing happened. This returns the counter that the three mutating routes
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* bump, so the cost of asking is a primary-key lookup, and the cost of the real reload is paid only
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* when the number has actually moved.
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*
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* Both session kinds answer here. A coordinator at the desk and a wearer on a ward are watching the
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* same facility, and there is nothing in a bare revision number to keep apart — it says that
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* something changed, never what. Anyone with no session at all gets 401 rather than a number,
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* because even "this facility is busy" is not ours to hand out.
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*/
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export async function GET(_req: NextRequest) {
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const user = await currentUser();
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const facilityId = user?.facilityId || (await currentStaff())?.facilityId;
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if (!facilityId) return NextResponse.json({ error: "Not signed in" }, { status: 401 });
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const f = await prisma.facility.findUnique({ where: { id: facilityId }, select: { rev: true } });
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if (!f) return NextResponse.json({ error: "Not signed in" }, { status: 401 });
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// Never from a cache: a stale revision is indistinguishable from nothing having happened, which
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// is the one wrong answer this endpoint can give.
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return NextResponse.json({ rev: f.rev }, { headers: { "cache-control": "no-store" } });
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}
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