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A seat a link carries is kept only once the server takes it, and never over a seat this browser holds that still opens, so a link someone else sends cannot take a working seat away

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MbtUPJ24P6vc6tE1x6RS3m
This commit is contained in:
Eric Wagoner
2026-10-13 18:22:54 -04:00
co-authored by Claude Opus 5.5
parent ecab471122
commit 4721b0e97b
1 changed files with 19 additions and 11 deletions
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template/src/routes/join/[code]/+page.svelte
+19 -11
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@@ -5,7 +5,7 @@
import Lobby from '$lib/components/Lobby.svelte';
import ReportSlip from '$lib/components/ReportSlip.svelte';
import Preferences from '$lib/components/Preferences.svelte';
import { rememberSeat, seatFor, seatInLink, trustSeat } from '$lib/net/client';
import { rememberSeat, seatFor, seatInLink, trustSeat, type HeldSeat } from '$lib/net/client';
import { NAME_MAX, playerName, rememberName, Room } from '$lib/net/room.svelte';
const roomId = $derived((page.params.code ?? '').toUpperCase());
@@ -25,23 +25,31 @@
const link = $derived(`${location.origin}/join/${roomId}`);
const watching = $derived(room?.spectating ?? false);
// Return to a held seat, or take a place in the gallery and offer one.
// Return to a held seat, or take a place in the gallery and offer one. A link from the keeper carries a seat:
// it leaves the address bar at once, is kept only once the server takes it, and never replaces a seat that
// still opens, so a link someone else sends cannot take a working seat away.
$effect(() => {
const id = roomId;
room = null;
error = '';
// A link from the keeper carries a seat; it is kept, and the token taken out of the address bar.
const sent = seatInLink(location.hash);
if (sent) {
rememberSeat(id, sent);
trustSeat(id);
replaceState(location.pathname + location.search, {});
}
if (sent) replaceState(location.pathname + location.search, {});
const held = seatFor(id);
const arrive = held ? Room.resume(id, held) : Room.watch(id);
joining = !held;
const take = (s: HeldSeat) =>
Room.resume(id, s).then((r) => {
rememberSeat(id, s);
trustSeat(id);
return r;
});
const arrive = held ? Room.resume(id, held).catch((e: Error) => (sent ? take(sent) : Promise.reject(e))) : sent ? take(sent).catch(() => Room.watch(id)) : Room.watch(id);
joining = !held && !sent;
if (!held) name = playerName();
arrive.then((r) => (room = r)).catch((e: Error) => (error = e.message));
arrive
.then((r) => {
room = r;
if (r.spectating) joining = true;
})
.catch((e: Error) => (error = e.message));
});
// Keep the view fresh for as long as the room is on screen.