파일/디렉터리 목록 정렬 재구현

src/routes/(main)/directory/[[id]]/DirectoryEntries/service.ts

@@ -0,0 +1,30 @@
+import { get, type Writable } from "svelte/store";
+import type { DirectoryInfo, FileInfo } from "$lib/stores";
+
+export enum SortBy {
+  NAME_ASC,
+  NAME_DESC,
+}
+
+type SortFunc = (a: DirectoryInfo | FileInfo | null, b: DirectoryInfo | FileInfo | null) => number;
+
+const sortByNameAsc: SortFunc = (a, b) => {
+  if (a && b) return a.name!.localeCompare(b.name!);
+  return 0;
+};
+
+const sortByNameDesc: SortFunc = (a, b) => -sortByNameAsc(a, b);
+
+export const sortEntries = <T extends DirectoryInfo | FileInfo>(
+  entries: Writable<T | null>[],
+  sortBy: SortBy = SortBy.NAME_ASC,
+) => {
+  let sortFunc: SortFunc;
+  if (sortBy === SortBy.NAME_ASC) {
+    sortFunc = sortByNameAsc;
+  } else {
+    sortFunc = sortByNameDesc;
+  }
+
+  entries.sort((a, b) => sortFunc(get(a), get(b)));
+};