From a6404847d157fbf20c1fdf97dbcf7b36f7c0c292 Mon Sep 17 00:00:00 2001
From: PJ <ipriyanshujain@gmail.com>
Date: Sat, 20 Jun 2026 15:09:13 -0400
Subject: [PATCH] refactor(store): nullable open book with open/close for
 library nav

---
 src/store/useBook.ts | 83 +++++++++++++++++++-------------------------
 1 file changed, 36 insertions(+), 47 deletions(-)

diff --git a/src/store/useBook.ts b/src/store/useBook.ts
index 01a004e..695d3e2 100644
--- a/src/store/useBook.ts
+++ b/src/store/useBook.ts
@@ -1,61 +1,50 @@
 import { create } from "zustand";
 import type { JSONContent } from "@tiptap/core";
-import { type Book, type BookMetadata, type BookSettings, createChapter, starterBook } from "../model/book";
+import { type Book, type BookMetadata, type BookSettings, createChapter } from "../model/book";
 
 interface BookState {
-  book: Book;
+  book: Book | null;
   activeChapterId: string;
-  path: string | null;
   dirty: boolean;
+  openBook: (book: Book) => void;
+  closeBook: () => void;
   setActiveChapter: (id: string) => void;
   setChapterContent: (id: string, content: JSONContent) => void;
   setChapterTitle: (id: string, title: string) => void;
   addChapter: () => void;
   setMetadata: (patch: Partial<BookMetadata>) => void;
   setSettings: (patch: Partial<BookSettings>) => void;
-  replaceBook: (book: Book, path: string) => void;
-  markSaved: (path: string) => void;
+  markSaved: () => void;
 }
 
-export const useBook = create<BookState>((set) => {
-  const book = starterBook();
-  return {
-    book,
-    activeChapterId: book.chapters[0].id,
-    path: null,
-    dirty: false,
-    setActiveChapter: (id) => set({ activeChapterId: id }),
-    setChapterContent: (id, content) =>
-      set((s) => ({
-        dirty: true,
-        book: {
-          ...s.book,
-          chapters: s.book.chapters.map((c) => (c.id === id ? { ...c, content } : c)),
-        },
-      })),
-    setChapterTitle: (id, title) =>
-      set((s) => ({
-        dirty: true,
-        book: {
-          ...s.book,
-          chapters: s.book.chapters.map((c) => (c.id === id ? { ...c, title } : c)),
-        },
-      })),
-    addChapter: () =>
-      set((s) => {
-        const chapter = createChapter();
-        return {
-          activeChapterId: chapter.id,
-          dirty: true,
-          book: { ...s.book, chapters: [...s.book.chapters, chapter] },
-        };
-      }),
-    setMetadata: (patch) =>
-      set((s) => ({ dirty: true, book: { ...s.book, metadata: { ...s.book.metadata, ...patch } } })),
-    setSettings: (patch) =>
-      set((s) => ({ dirty: true, book: { ...s.book, settings: { ...s.book.settings, ...patch } } })),
-    replaceBook: (book, path) =>
-      set({ book, activeChapterId: book.chapters[0]?.id ?? "", path, dirty: false }),
-    markSaved: (path) => set({ path, dirty: false }),
-  };
-});
+export const useBook = create<BookState>((set) => ({
+  book: null,
+  activeChapterId: "",
+  dirty: false,
+  openBook: (book) => set({ book, activeChapterId: book.chapters[0]?.id ?? "", dirty: false }),
+  closeBook: () => set({ book: null, activeChapterId: "", dirty: false }),
+  setActiveChapter: (id) => set({ activeChapterId: id }),
+  setChapterContent: (id, content) =>
+    set((s) =>
+      s.book
+        ? { dirty: true, book: { ...s.book, chapters: s.book.chapters.map((c) => (c.id === id ? { ...c, content } : c)) } }
+        : {}
+    ),
+  setChapterTitle: (id, title) =>
+    set((s) =>
+      s.book
+        ? { dirty: true, book: { ...s.book, chapters: s.book.chapters.map((c) => (c.id === id ? { ...c, title } : c)) } }
+        : {}
+    ),
+  addChapter: () =>
+    set((s) => {
+      if (!s.book) return {};
+      const chapter = createChapter();
+      return { activeChapterId: chapter.id, dirty: true, book: { ...s.book, chapters: [...s.book.chapters, chapter] } };
+    }),
+  setMetadata: (patch) =>
+    set((s) => (s.book ? { dirty: true, book: { ...s.book, metadata: { ...s.book.metadata, ...patch } } } : {})),
+  setSettings: (patch) =>
+    set((s) => (s.book ? { dirty: true, book: { ...s.book, settings: { ...s.book.settings, ...patch } } } : {})),
+  markSaved: () => set({ dirty: false }),
+}));