feat: local store read progress for later sync

src/lib/services/client-offlinebook.service.ts

@@ -0,0 +1,31 @@
+import { KomgaBook } from "@/types/komga";
+
+export class ClientOfflineBookService {
+  static setCurrentPage(book: KomgaBook, page: number) {
+    localStorage.setItem(`${book.id}-page`, page.toString());
+  }
+
+  static getCurrentPage(book: KomgaBook) {
+    const readProgressPage = book.readProgress?.page || 0;
+    if (typeof localStorage !== "undefined") {
+      const cPageLS = localStorage.getItem(`${book.id}-page`) || "0";
+      const currentPage = parseInt(cPageLS);
+
+      if (currentPage < readProgressPage) {
+        return readProgressPage;
+      }
+
+      return currentPage;
+    } else {
+      return readProgressPage;
+    }
+  }
+
+  static removeCurrentPage(book: KomgaBook) {
+    localStorage.removeItem(`${book.id}-page`);
+  }
+
+  static removeCurrentPageById(bookId: string) {
+    localStorage.removeItem(`${bookId}-page`);
+  }
+}