Move library album and track operations into shared server modules

web-player/src/lib/server/forms/albumForm.ts

@@ -1,7 +1,7 @@
 import { formString } from '$lib/server/forms/fields';
 import { ALBUM_EARLIEST_YEAR, LIMITS } from '$lib/validation';
 
-interface AlbumFormBody {
+export interface AlbumFormBody {
 	title: string;
 	description: string | null;
 	releaseYear: number | null;

web-player/src/lib/server/forms/fields.ts

@@ -6,3 +6,10 @@ export function formFile(form: FormData, key: string): File | null {
 	const value = form.get(key);
 	return value instanceof File && value.size > 0 ? value : null;
 }
+
+export function formIds(form: FormData, key: string): string[] {
+	return form
+		.getAll(key)
+		.flatMap((value) => String(value).split(','))
+		.filter(Boolean);
+}