Split the booking-page template into a folder of focused files

scripts/mutation/equivalent-mutants.txt

@@ -79,8 +79,8 @@ src/features/public/ticket-payment.ts:873:47  ?? → ||   # packageMaps?.quantit
 # Parent/child curried atoms (shared.tsx).
 src/ui/templates/public/shared.tsx:318:41  ?? → ||   # span: null or a duration ≥1, never falsy-non-null; null??1===null||1
 
-# Parent/child per-unit render (reservations page-meta.ts).
-src/ui/templates/public/reservations/page-meta.ts:66:55  ?? → ||   # addOns?.some(...) is boolean|undefined; ?? and || agree on every boolean and on undefined
+# Parent/child per-unit render (reservations contact-fields.ts).
+src/ui/templates/public/reservations/contact-fields.ts:107:51  ?? → ||   # addOns?.some(...) is boolean|undefined; ?? and || agree on every boolean and on undefined
 
 # Attendee phone blind-index (attendee-phone-index.ts).
 src/shared/db/attendee-phone-index.ts:36:17  ?? → ||   # row?.id is undefined or an AUTOINCREMENT id (≥1, never 0), so ?? and || agree

src/features/public/qr-book.ts

@@ -28,7 +28,7 @@ import { qrBookErrorPage } from "#templates/public/errors.tsx";
 import type {
   BookingPrefill,
   TicketPrefill,
-} from "#templates/public/reservations/inputs.ts";
+} from "#templates/public/reservations/types.ts";
 import { getTicketContext, runCheckoutFlow } from "./ticket-payment.ts";
 import { handleTicket } from "./ticket-submit.ts";
 

src/features/public/ticket-submit.ts

@@ -42,7 +42,7 @@ import {
 import type {
   BookingPrefill,
   TicketPrefill,
-} from "#templates/public/reservations/inputs.ts";
+} from "#templates/public/reservations/types.ts";
 import {
   applyBookingPageParentSoldOut,
   childCapacityInfo,

src/features/public/types.ts

@@ -17,7 +17,7 @@ import type {
   ItemImageProjection,
   ListingWithCount,
 } from "#shared/types.ts";
-import type { BookingPrefill } from "#templates/public/reservations/inputs.ts";
+import type { BookingPrefill } from "#templates/public/reservations/types.ts";
 
 /** Parent listing id → its bookable-child candidates, each hydrated to a
  * {@link TicketListing} so availability (isSoldOut/isClosed/maxPurchasable) is

src/shared/booking/package-cap.ts

@@ -46,6 +46,22 @@ export const packageLimitInfo = (
   ...groupCapacityInfo(groupRemainingByGroupId, groupIdsByListingId),
 });
 
+/** Each page package's whole-bundle limit, keyed by group id. Builds the
+ * page-level {@link PackageLimitInfo} once and maps each package over
+ * {@link pagePackageBundleLimit}, so callers stop re-stating the four
+ * limit-info arguments per call site. */
+export const pageBundleLimits = (
+  tree: BookingTree,
+  packages: readonly TreePackage[],
+  page: PackageLimitInfo,
+): Map<number, number> =>
+  new Map(
+    packages.map((pkg) => [
+      pkg.groupId,
+      pagePackageBundleLimit(tree, pkg, page),
+    ]),
+  );
+
 export const childCanBeBooked: (child: TicketListing) => boolean =
   childPassesAllChecks([childActive, childOpen, childInStock]);
 

src/ui/templates/public/reservations/availability.ts

@@ -0,0 +1,103 @@
+/** Page-level availability and tree-shaping: the unavailability message, the
+ * booking tree plus which listings get their own standalone row, the overall
+ * sold-out check, and the lone header listing whose details head the page. */
+
+/* jscpd:ignore-start */
+import { reduce } from "#fp";
+import { t } from "#i18n";
+import {
+  type BuildTreeInput,
+  buildBookingTree,
+} from "#shared/booking/build-tree.ts";
+import type { TicketListing } from "#shared/booking/model.ts";
+import {
+  type PackageLimitInfo,
+  pageBundleLimits,
+} from "#shared/booking/package-cap.ts";
+import type { PagePackage } from "#shared/booking/page-packages.ts";
+import type { BookingNode, BookingTree } from "#shared/booking/tree.ts";
+import { standaloneListingIds } from "#shared/booking/tree.ts";
+import { isReadOnly } from "#shared/env.ts";
+import type { ListingWithCount } from "#shared/types.ts";
+/* jscpd:ignore-end */
+
+/** Unavailability message shown when all listings are sold out or closed */
+export const unavailableMessage = (
+  allClosed: boolean,
+  isSingleListing: boolean,
+): string => {
+  if (isReadOnly() || allClosed) return t("public.ticket.registration_closed");
+  return isSingleListing
+    ? t("public.ticket.listing_full")
+    : t("public.multi.all_sold_out");
+};
+
+/** Each page package's bundle limit, plus whether the whole page should show as
+ * sold out (nothing standalone left AND no package bookable). */
+export const packagePageAvailability = (
+  packages: PagePackage[],
+  tree: BookingTree,
+  listings: TicketListing[],
+  standaloneRowIds: ReadonlySet<number>,
+  page: PackageLimitInfo,
+): { packageLimits: Map<number, number>; soldOut: boolean } => {
+  const packageLimits = pageBundleLimits(tree, packages, page);
+  const standaloneUnavailable = listings
+    .filter((info) => standaloneRowIds.has(info.listing.id))
+    .every((e) => e.isSoldOut || e.isClosed);
+  const packagesUnavailable = [...packageLimits.values()].every(
+    (limit) => limit === 0,
+  );
+  return {
+    packageLimits,
+    // Sold out only when every standalone row AND every bundle is dead (a
+    // bundle with an unavailable member already reads limit 0; a package-less
+    // page has no bundles, leaving just its listings' own availability).
+    soldOut: standaloneUnavailable && packagesUnavailable,
+  };
+};
+
+/** The lone listing whose rich details (image/date/location) head the page and
+ * feed its OpenGraph tags, or null for a multi-listing page OR a hidden package
+ * — a hidden package with one active member must not expose that member here. */
+export const headerListing = (
+  listings: TicketListing[],
+  packages: PagePackage[],
+): ListingWithCount | null =>
+  listings.length === 1 && !packages.some((pkg) => pkg.hideListings)
+    ? listings[0]!.listing
+    : null;
+
+/** Build the page's booking tree and the row-shaping facts read off it: which
+ * listings get their own quantity row (those with a standalone BUYER_CHOICE
+ * node), which node each row reads its field names from (a dual-path listing
+ * resolves to its standalone node, not its member node), and whether the page
+ * IS one package (every listing a member, nothing sold beside it — the classic
+ * package-page layout). */
+export const buildPageTree = (
+  input: BuildTreeInput,
+  packageCount: number,
+): {
+  tree: BookingTree;
+  standaloneRowIds: Set<number>;
+  nodeByListingId: Map<number, BookingNode>;
+  singlePackagePage: boolean;
+} => {
+  const tree = buildBookingTree(input);
+  const standaloneRowIds = standaloneListingIds(tree);
+  // A BUYER_CHOICE node wins over any earlier node for the same listing id
+  // (a dual-path listing resolves to its standalone node, not its member node);
+  // every other kind keeps the first node seen.
+  const nodeByListingId = reduce((acc, node: BookingNode) => {
+    if (!acc.has(node.listingId) || node.quantityRule.kind === "BUYER_CHOICE") {
+      acc.set(node.listingId, node);
+    }
+    return acc;
+  }, new Map<number, BookingNode>())([...tree.nodes]);
+  return {
+    nodeByListingId,
+    singlePackagePage: packageCount === 1 && standaloneRowIds.size === 0,
+    standaloneRowIds,
+    tree,
+  };
+};