feat: add CMS data cache layer

eslint.config.mjs

@@ -18,6 +18,7 @@ export default tseslint.config(
             'src/components/**',
             'src/config.ts',
             'src/data/**',
+            'src/lib/umbraco/*ApiSchema.d.ts',
             'src/serverConfig.ts',
             'src/util.ts',
         ],

generateUmbracoApiClient.ts

@@ -26,7 +26,7 @@ async function main() {
             const outputAst = await openapiTS(url.toString());
 
             await fs.promises.writeFile(
-                path.join(__dirname, 'src', 'data', 'umbraco', outputFile),
+                path.join(__dirname, 'src', 'lib', 'umbraco', outputFile),
                 astToString(outputAst),
             );
         }),

src/data/parseUtcAsCst.ts → src/lib/date.ts

@@ -1,7 +1,10 @@
-import { TZDate } from '@date-fns/tz';
-import { CST_TZ } from '@/config';
+import { TZDate, tz } from '@date-fns/tz';
+import { format } from 'date-fns';
+import { CST_TZ } from '#lib/config.ts';
 
-// Umbraco doesn't save dates with timezone information so we have to manually fix it
+// Umbraco stores Chicago-local date parts without reliable zone data. Interpret
+// the parts in America/Chicago, then return a plain Date instant so SvelteKit can
+// serialize load data without custom transport hooks.
 export function parseUtcAsCst(dateStr: string): Date {
     const match = dateStr.match(
         /^(\d{4})-(\d{2})-(\d{2})(?:T(\d{2}):(\d{2})(?::(\d{2})(?:\.(\d{1,7}))?)?)?(?:Z|[+-]\d{2}:\d{2})?$/,
@@ -32,7 +35,7 @@ export function parseUtcAsCst(dateStr: string): Date {
         (millisecondStr ?? '0').slice(0, 3).padEnd(3, '0'),
     );
 
-    return new TZDate(
+    const parsed = new TZDate(
         year,
         month,
         day,
@@ -42,4 +45,10 @@ export function parseUtcAsCst(dateStr: string): Date {
         millisecond,
         CST_TZ,
     );
+
+    return new Date(parsed.getTime());
+}
+
+export function formatDate(date: Date | string, formatStr: string): string {
+    return format(date, formatStr, { in: tz(CST_TZ) });
 }