Chore: Restructure Repository for SvelteKit

_old/features/library/lib/librarySort.ts

@@ -0,0 +1,52 @@
+import { createSorter } from "@core/algorithms/sort";
+import type { Manga }   from "@types";
+import type { LibrarySortMode, LibrarySortDir } from "@store/state.svelte";
+
+export const librarySorter = createSorter<Manga>({
+  defaultField: "az",
+  defaultDir:   "asc",
+  fields: [
+    {
+      key: "az",
+      comparator: (a, b) => a.title.localeCompare(b.title, undefined, { sensitivity: "base" }),
+    },
+    {
+      key: "unreadCount",
+      comparator: (a, b) => (a.unreadCount ?? 0) - (b.unreadCount ?? 0),
+    },
+    {
+      key: "totalChapters",
+      comparator: (a, b) => (a.chapters?.totalCount ?? 0) - (b.chapters?.totalCount ?? 0),
+    },
+    {
+      key: "recentlyAdded",
+      comparator: (a, b) => Number(a.inLibraryAt ?? 0) - Number(b.inLibraryAt ?? 0),
+    },
+    {
+      key: "recentlyRead",
+      comparator: (a, b, ctx) => {
+        const map = ctx?.recentlyReadMap as Map<number, number> | undefined;
+        const ra  = map?.get(a.id) ?? 0;
+        const rb  = map?.get(b.id) ?? 0;
+        return ra - rb;
+      },
+    },
+    {
+      key: "latestFetched",
+      comparator: (a, b) => Number(a.latestFetchedChapter?.uploadDate ?? 0) - Number(b.latestFetchedChapter?.uploadDate ?? 0),
+    },
+    {
+      key: "latestUploaded",
+      comparator: (a, b) => Number(a.latestUploadedChapter?.uploadDate ?? 0) - Number(b.latestUploadedChapter?.uploadDate ?? 0),
+    },
+  ],
+});
+
+export function sortLibrary(
+  items: Manga[],
+  mode: LibrarySortMode,
+  dir: LibrarySortDir,
+  recentlyReadMap?: Map<number, number>,
+): Manga[] {
+  return librarySorter.sort(items, mode, dir, recentlyReadMap ? { recentlyReadMap } : undefined);
+}