From 9cdf69443781203c86256dea85918960b1f17c9c Mon Sep 17 00:00:00 2001
From: Lukas Obermann <lukas.obermann@icloud.com>
Date: Thu, 12 Mar 2026 23:14:49 +0100
Subject: [PATCH] fix!: require external date formatter

---
 scripts/testOutput.ts     |  2 ++
 src/creator.ts            |  2 +-
 src/helpers/locale.ts     |  1 +
 test/helpers/locale.ts    |  3 ++-
 test/helpers/translate.ts | 21 +++++++++------------
 5 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/scripts/testOutput.ts b/scripts/testOutput.ts
index 1dab757..c9964a3 100644
--- a/scripts/testOutput.ts
+++ b/scripts/testOutput.ts
@@ -67,11 +67,13 @@ const unitListFormat = new Intl.ListFormat(localeId, {
 })
 
 const collator = new Intl.Collator(localeId, { usage: "sort" })
+const dateFormatter = new Intl.DateTimeFormat(localeId)
 
 const localeEnv: LocaleEnvironment = {
   id: localeId,
   format: (text, args) => new MessageFormat(localeId, text, { bidiIsolation: "none" }).format(args),
   compare: collator.compare.bind(collator),
+  formatDate: dateFormatter.format.bind(dateFormatter),
   translate: (key, ...rest) =>
     new MessageFormat(localeId, localeInstance.translations?.[key] ?? key, {
       bidiIsolation: "none",
diff --git a/src/creator.ts b/src/creator.ts
index ce0c59e..a0cb93f 100644
--- a/src/creator.ts
+++ b/src/creator.ts
@@ -114,7 +114,7 @@ export const createEntityDescriptionCreator =
       ...rawEntry,
       body: rawEntry.body.filter(isNotNullish).map(mapRawSection),
       errata: rawEntry.errata?.map(({ date, description }) => ({
-        date: date.toLocaleDateString(locale.id),
+        date: locale.formatDate(date),
         description: description.trim(),
       })),
       references:
diff --git a/src/helpers/locale.ts b/src/helpers/locale.ts
index a6be57e..9ccc080 100644
--- a/src/helpers/locale.ts
+++ b/src/helpers/locale.ts
@@ -13,6 +13,7 @@ export type LocaleJoinType = "conjunction" | "disjunction" | "unit"
 export type LocaleEnvironment = {
   id: string
   format: Format
+  formatDate: (date: Date) => string
   translate: Translate
   translateMap: TranslateMap
   compare: LocaleCompare
diff --git a/test/helpers/locale.ts b/test/helpers/locale.ts
index cf088d1..d3f3469 100644
--- a/test/helpers/locale.ts
+++ b/test/helpers/locale.ts
@@ -1,6 +1,6 @@
 import { assertExhaustive } from "@elyukai/utils/typeSafety"
 import { LocaleEnvironment } from "../../src/helpers/locale.js"
-import { formatMock, translateMapMock, translateMock } from "./translate.js"
+import { formatDateMock, formatMock, translateMapMock, translateMock } from "./translate.js"
 
 const localeId = "en-US"
 
@@ -22,6 +22,7 @@ const unitListFormat = new Intl.ListFormat(localeId, {
 export const defaultLocaleEnvironment: LocaleEnvironment = {
   id: "en-US",
   format: formatMock,
+  formatDate: formatDateMock,
   translate: translateMock,
   translateMap: translateMapMock,
   compare: (x, y) => collator.compare(x, y),
diff --git a/test/helpers/translate.ts b/test/helpers/translate.ts
index 4389740..09e6ecf 100644
--- a/test/helpers/translate.ts
+++ b/test/helpers/translate.ts
@@ -1,26 +1,23 @@
 import { MessageFormat } from "messageformat"
-import {
-  Translate,
-  TranslateMap,
-  type Format,
-} from "../../src/helpers/translate.js"
+import { Translate, TranslateMap, type Format } from "../../src/helpers/translate.js"
 
 /**
  * A mocked format function.
  */
-export const formatMock: Format = (text, args) =>
-  new MessageFormat("en", text).format(args)
+export const formatMock: Format = (text, args) => new MessageFormat("en", text).format(args)
+
+/**
+ * A mocked date format function that formats a date as YYYY-MM-DD.
+ */
+export const formatDateMock = (date: Date): string => date.toISOString().split("T")[0] ?? ""
 
 /**
  * A mocked translate function.
  */
 export const translateMock: Translate = (key, ...rest) =>
-  new MessageFormat("en", key).format(
-    rest[0] as Record<string, unknown> | undefined,
-  )
+  new MessageFormat("en", key).format(rest[0] as Record<string, unknown> | undefined)
 
 /**
  * A mocked translate map function.
  */
-export const translateMapMock: TranslateMap = map =>
-  map?.["en-US"] ?? map?.["de-DE"]
+export const translateMapMock: TranslateMap = map => map?.["en-US"] ?? map?.["de-DE"]