Update database schema and synchronization logic

- Add `useEffect` in `ScribeLeftBar` for handling book state changes.
- Extend `BooksSyncContext` with new properties and stricter typings.
- Refine `Repositories` to include `lastUpdate` handling for synchronization processes.
- Add comprehensive `fetchComplete*` repository methods for retrieving entity-specific sync data.
- Enhance offline logic for chapters, characters, locations, and world synchronization.
- Improve error handling across IPC handlers and repositories.

app/page.tsx

@@ -33,7 +33,7 @@ import OfflineProvider from "@/context/OfflineProvider";
 import OfflineContext from "@/context/OfflineContext";
 import OfflinePinSetup from "@/components/offline/OfflinePinSetup";
 import OfflinePinVerify from "@/components/offline/OfflinePinVerify";
-import {SyncedBook} from "@/lib/models/SyncedBook";
+import {SyncedBook, BookSyncCompare, compareBookSyncs} from "@/lib/models/SyncedBook";
 import {BooksSyncContext} from "@/context/BooksSyncContext";
 
 const messagesMap = {
@@ -64,8 +64,8 @@ function ScribeContent() {
     
     const [serverSyncedBooks, setServerSyncedBooks] = useState<SyncedBook[]>([]);
     const [localSyncedBooks, setLocalSyncedBooks] = useState<SyncedBook[]>([]);
-    const [booksToSyncFromServer, setBooksToSyncFromServer] = useState<SyncedBook[]>([]);
+    const [bookSyncDiffsFromServer, setBookSyncDiffsFromServer] = useState<BookSyncCompare[]>([]);
-    const [booksToSyncToServer, setBooksToSyncToServer] = useState<SyncedBook[]>([]);
+    const [bookSyncDiffsToServer, setBookSyncDiffsToServer] = useState<BookSyncCompare[]>([]);
     const [serverOnlyBooks, setServerOnlyBooks] = useState<SyncedBook[]>([]);
     const [localOnlyBooks, setLocalOnlyBooks] = useState<SyncedBook[]>([]);
 
@@ -166,16 +166,35 @@ function ScribeContent() {
     }, [currentBook]);
     
     useEffect((): void => {
-        setBooksToSyncFromServer(serverSyncedBooks.filter((serverBook: SyncedBook):boolean => {
+        const diffsFromServer: BookSyncCompare[] = [];
-            const localBook: SyncedBook | undefined = localSyncedBooks.find((localBook: SyncedBook):boolean => localBook.id === serverBook.id);
+        const diffsToServer: BookSyncCompare[] = [];
-            console.log('localBook from setBookToSyncFromServer',localBook);
+
-            console.log('serverBook from setBookToSyncFromServer',serverBook);
+        serverSyncedBooks.forEach((serverBook: SyncedBook): void => {
-            return !localBook || localBook.lastUpdate < serverBook.lastUpdate;
+            const localBook: SyncedBook | undefined = localSyncedBooks.find((book: SyncedBook): boolean => book.id === serverBook.id);
-        }))
+            if (!localBook) {
-        setBooksToSyncToServer(localSyncedBooks.filter((localBook: SyncedBook):boolean => {
+                return;
-            const serverBook: SyncedBook | undefined = serverSyncedBooks.find((serverBook: SyncedBook):boolean => serverBook.id === localBook.id);
+            }
-            return !serverBook || serverBook.lastUpdate < localBook.lastUpdate;
+
-        }))
+            const diff: BookSyncCompare | null = compareBookSyncs(serverBook, localBook);
+            if (diff) {
+                diffsFromServer.push(diff);
+            }
+        });
+
+        localSyncedBooks.forEach((localBook: SyncedBook): void => {
+            const serverBook: SyncedBook | undefined = serverSyncedBooks.find((book: SyncedBook): boolean => book.id === localBook.id);
+            if (!serverBook) {
+                return;
+            }
+
+            const diff: BookSyncCompare | null = compareBookSyncs(localBook, serverBook);
+            if (diff) {
+                diffsToServer.push(diff);
+            }
+        });
+        
+        setBookSyncDiffsFromServer(diffsFromServer);
+        setBookSyncDiffsToServer(diffsToServer);
         setServerOnlyBooks(serverSyncedBooks.filter((serverBook: SyncedBook):boolean => !localSyncedBooks.find((localBook: SyncedBook):boolean => localBook.id === serverBook.id)))
         setLocalOnlyBooks(localSyncedBooks.filter((localBook: SyncedBook):boolean => !serverSyncedBooks.find((serverBook: SyncedBook):boolean => serverBook.id === localBook.id)))
     }, [localSyncedBooks, serverSyncedBooks]);
@@ -488,7 +507,7 @@ function ScribeContent() {
 
     return (
         <SessionContext.Provider value={{session: session, setSession: setSession}}>
-            <BooksSyncContext.Provider value={{serverSyncedBooks, localSyncedBooks, booksToSyncFromServer, booksToSyncToServer, serverOnlyBooks, localOnlyBooks}}>
+            <BooksSyncContext.Provider value={{serverSyncedBooks, localSyncedBooks, booksToSyncFromServer:bookSyncDiffsFromServer, booksToSyncToServer:bookSyncDiffsToServer, setServerOnlyBooks, setLocalOnlyBooks, serverOnlyBooks, localOnlyBooks}}>
                 <BookContext.Provider value={{book: currentBook, setBook: setCurrentBook}}>
                     <ChapterContext.Provider value={{chapter: currentChapter, setChapter: setCurrentChapter}}>
                         <AIUsageContext.Provider value={{

components/ScribeControllerBar.tsx

@@ -18,6 +18,7 @@ import {LangContext, LangContextProps} from "@/context/LangContext";
 import CreditCounter from "@/components/CreditMeters";
 import QuillSense from "@/lib/models/QuillSense";
 import OfflineContext, {OfflineContextType} from "@/context/OfflineContext";
+import {BooksSyncContext, BooksSyncContextProps} from "@/context/BooksSyncContext";
 
 export default function ScribeControllerBar() {
     const {chapter, setChapter} = useContext(ChapterContext);
@@ -27,6 +28,7 @@ export default function ScribeControllerBar() {
     const t = useTranslations();
     const {lang, setLang} = useContext<LangContextProps>(LangContext);
     const {isCurrentlyOffline} = useContext<OfflineContextType>(OfflineContext)
+    const {serverOnlyBooks,localOnlyBooks} = useContext<BooksSyncContextProps>(BooksSyncContext);
     
     const isGPTEnabled: boolean = !isCurrentlyOffline() && QuillSense.isOpenAIEnabled(session);
     const isGemini: boolean = !isCurrentlyOffline() && QuillSense.isOpenAIEnabled(session);
@@ -120,7 +122,7 @@ export default function ScribeControllerBar() {
                 </div>
                 <div className="min-w-[200px]">
                     <SelectBox onChangeCallBack={(e) => getBook(e.target.value)}
-                               data={Book.booksToSelectBox(session.user?.books ?? [])} defaultValue={book?.bookId}
+                               data={Book.booksToSelectBox([...serverOnlyBooks, ...localOnlyBooks])} defaultValue={book?.bookId}
                                placeholder={t("controllerBar.selectBook")}/>
                 </div>
                 {chapter && (

components/ScribeFooterBar.tsx

@@ -8,14 +8,15 @@ import {SessionContext} from "@/context/SessionContext";
 import {useTranslations} from "next-intl";
 import {AlertContext} from "@/context/AlertContext";
 import {BookContext} from "@/context/BookContext";
+import {BooksSyncContext, BooksSyncContextProps} from "@/context/BooksSyncContext";
 
 export default function ScribeFooterBar() {
     const t = useTranslations();
     const {chapter} = useContext(ChapterContext);
     const {book} = useContext(BookContext);
     const editor: Editor | null = useContext(EditorContext).editor;
-    const {session} = useContext(SessionContext);
     const {errorMessage} = useContext(AlertContext)
+    const {serverOnlyBooks,localOnlyBooks} = useContext<BooksSyncContextProps>(BooksSyncContext);
     
     const [wordsCount, setWordsCount] = useState<number>(0);
     
@@ -91,7 +92,7 @@ export default function ScribeFooterBar() {
                             className="flex items-center gap-2 bg-secondary/50 px-4 py-2 rounded-xl border border-secondary shadow-sm">
                             <FontAwesomeIcon icon={faBook} className={'text-primary w-4 h-4'}/>
                             <span className="text-muted text-sm font-medium mr-1">{t('scribeFooterBar.books')}:</span>
-                            <span className="text-text-primary font-bold">{session.user?.books?.length}</span>
+                            <span className="text-text-primary font-bold">{(serverOnlyBooks.length+localOnlyBooks.length)}</span>
                         </div>
                     </div>
                 )

components/SyncBook.tsx

@@ -7,8 +7,9 @@ import System from "@/lib/models/System";
 import {SessionContext, SessionContextProps} from "@/context/SessionContext";
 import {LangContext} from "@/context/LangContext";
 import {CompleteBook} from "@/lib/models/Book";
-import {SyncType} from "@/context/BooksSyncContext";
+import {BooksSyncContext, BooksSyncContextProps, SyncType} from "@/context/BooksSyncContext";
 import {AlertContext, AlertContextProps} from "@/context/AlertContext";
+import {BookSyncCompare} from "@/lib/models/SyncedBook";
 
 interface SyncBookProps {
     bookId: string;
@@ -23,6 +24,7 @@ export default function SyncBook({bookId, status}: SyncBookProps) {
     const {isCurrentlyOffline} = useContext<OfflineContextType>(OfflineContext);
     const [isLoading, setIsLoading] = useState<boolean>(false);
     const [currentStatus, setCurrentStatus] = useState<SyncType>(status);
+    const {booksToSyncToServer, booksToSyncFromServer} = useContext<BooksSyncContextProps>(BooksSyncContext)
 
     const isOffline: boolean = isCurrentlyOffline();
 
@@ -53,11 +55,67 @@ export default function SyncBook({bookId, status}: SyncBookProps) {
     }
 
     async function syncFromServer(): Promise<void> {
-        // TODO: Implement sync from server (server has newer version)
+        if (isOffline) {
+            return;
+        }
+        try {
+            const bookToFetch:BookSyncCompare|undefined = booksToSyncFromServer.find((book:BookSyncCompare):boolean => book.id === bookId);
+            if (!bookToFetch) {
+                errorMessage(t("bookCard.syncFromServerError"));
+                return;
+            }
+            const response: CompleteBook = await System.authPostToServer('book/sync/server-to-client', {
+                bookToSync: bookToFetch
+            }, session.accessToken, lang);
+            if (!response) {
+                errorMessage(t("bookCard.syncFromServerError"));
+                return;
+            }
+            const syncStatus:boolean = await window.electron.invoke<boolean>('db:book:sync:toClient', response);
+            if (!syncStatus) {
+                errorMessage(t("bookCard.syncFromServerError"));
+                return;
+            }
+            setCurrentStatus('synced');
+        } catch (e:unknown) {
+            if (e instanceof Error) {
+                errorMessage(e.message);
+            } else {
+                errorMessage(t("bookCard.syncFromServerError"));
+            }
+        }
     }
 
     async function syncToServer(): Promise<void> {
-        // TODO: Implement sync to server (local has newer version)
+        if (isOffline) {
+            return;
+        }
+        try {
+            const bookToFetch:BookSyncCompare|undefined = booksToSyncToServer.find((book:BookSyncCompare):boolean => book.id === bookId);
+            if (!bookToFetch) {
+                errorMessage(t("bookCard.syncToServerError"));
+                return;
+            }
+            const bookToSync: CompleteBook = await window.electron.invoke<CompleteBook>('db:book:sync:toServer', bookToFetch);
+            if (!bookToSync) {
+                errorMessage(t("bookCard.syncToServerError"));
+                return;
+            }
+            const response: boolean = await System.authPutToServer('book/sync/client-to-server', {
+                book: bookToSync
+            }, session.accessToken, lang);
+            if (!response) {
+                errorMessage(t("bookCard.syncToServerError"));
+                return;
+            }
+            setCurrentStatus('synced');
+        } catch (e:unknown) {
+            if (e instanceof Error) {
+                errorMessage(e.message);
+            } else {
+                errorMessage(t("bookCard.syncToServerError"));
+            }
+        }
     }
 
     if (isLoading) {

components/book/BookList.tsx

@@ -15,7 +15,7 @@ import {useTranslations} from "next-intl";
 import {LangContext, LangContextProps} from "@/context/LangContext";
 import OfflineContext, {OfflineContextType} from "@/context/OfflineContext";
 import {BooksSyncContext, BooksSyncContextProps, SyncType} from "@/context/BooksSyncContext";
-import {SyncedBook} from "@/lib/models/SyncedBook";
+import {BookSyncCompare, SyncedBook} from "@/lib/models/SyncedBook";
 
 export default function BookList() {
     const {session, setSession} = useContext(SessionContext);
@@ -190,10 +190,10 @@ export default function BookList() {
         if (localOnlyBooks.find((book: SyncedBook):boolean => book.id === bookId)) {
             return 'local-only';
         }
-        if (booksToSyncFromServer.find((book: SyncedBook):boolean => book.id === bookId)) {
+        if (booksToSyncFromServer.find((book: BookSyncCompare):boolean => book.id === bookId)) {
             return 'to-sync-from-server';
         }
-        if (booksToSyncToServer.find((book: SyncedBook):boolean => book.id === bookId)) {
+        if (booksToSyncToServer.find((book: BookSyncCompare):boolean => book.id === bookId)) {
             return 'to-sync-to-server';
         }
         return 'synced';

components/leftbar/ScribeChapterComponent.tsx

@@ -36,6 +36,7 @@ export default function ScribeChapterComponent() {
     const scrollContainerRef = useRef<HTMLUListElement>(null);
     
     useEffect((): void => {
+        if (book)
         getChapterList().then();
     }, [book]);
     

components/leftbar/ScribeLeftBar.tsx

@@ -1,6 +1,6 @@
 import {FontAwesomeIcon} from "@fortawesome/react-fontawesome";
 import {faBookMedical, faBookOpen, faFeather} from "@fortawesome/free-solid-svg-icons";
-import {useContext, useState} from "react";
+import {useContext, useEffect, useState} from "react";
 import {BookContext} from "@/context/BookContext";
 import ScribeChapterComponent from "@/components/leftbar/ScribeChapterComponent";
 import PanelHeader from "@/components/PanelHeader";
@@ -75,6 +75,14 @@ export default function ScribeLeftBar() {
         }
     }
     
+    useEffect(():void => {
+        if (!book){
+            setCurrentPanel(undefined);
+            setPanelHidden(false);
+            return;
+        }
+    }, [book]);
+    
     return (
         <div id="left-panel-container" data-guide={"left-panel-container"} className="flex transition-all duration-300">
             <div className="bg-tertiary border-r border-secondary/50 p-3 flex flex-col space-y-3 shadow-xl">

components/rightbar/ComposerRightBar.tsx

@@ -1,8 +1,7 @@
 import {FontAwesomeIcon} from "@fortawesome/react-fontawesome";
 import {faFeather, faGlobe, faInfoCircle, faMapMarkerAlt, faUsers} from "@fortawesome/free-solid-svg-icons";
-import {RefObject, useContext, useRef, useState} from "react";
+import {RefObject, useContext, useEffect, useRef, useState} from "react";
 import {BookContext} from "@/context/BookContext";
-import {ChapterContext} from "@/context/ChapterContext";
 import {PanelComponent} from "@/lib/models/Editor";
 import PanelHeader from "@/components/PanelHeader";
 import AboutEditors from "@/components/rightbar/AboutERitors";
@@ -57,6 +56,14 @@ export default function ComposerRightBar() {
         }
     }
     
+    useEffect(():void => {
+        if (!book){
+            setCurrentPanel(undefined);
+            setPanelHidden(false);
+            return;
+        }
+    }, [book]);
+    
     const editorComponents: PanelComponent[] = [
         {
             id: 1,

context/BooksSyncContext.ts

@@ -1,13 +1,15 @@
-import {SyncedBook} from "@/lib/models/SyncedBook";
+import {BookSyncCompare, SyncedBook} from "@/lib/models/SyncedBook";
-import {Context, createContext} from "react";
+import {Context, createContext, Dispatch, SetStateAction} from "react";
 
 export type SyncType = 'server-only' | 'local-only' | 'to-sync-from-server' | 'to-sync-to-server' | 'synced'
 
 export interface BooksSyncContextProps {
     serverSyncedBooks:SyncedBook[];
     localSyncedBooks:SyncedBook[];
-    booksToSyncFromServer:SyncedBook[];
+    booksToSyncFromServer:BookSyncCompare[];
-    booksToSyncToServer:SyncedBook[];
+    booksToSyncToServer:BookSyncCompare[];
+    setServerOnlyBooks:Dispatch<SetStateAction<SyncedBook[]>>;
+    setLocalOnlyBooks:Dispatch<SetStateAction<SyncedBook[]>>;
     serverOnlyBooks:SyncedBook[];
     localOnlyBooks:SyncedBook[];
 }
@@ -17,6 +19,8 @@ export const BooksSyncContext:Context<BooksSyncContextProps> = createContext<Boo
     localSyncedBooks:[],
     booksToSyncFromServer:[],
     booksToSyncToServer:[],
+    setServerOnlyBooks:():void => {},
+    setLocalOnlyBooks:():void => {},
     serverOnlyBooks:[],
     localOnlyBooks:[]
 })

electron/database/models/Book.ts

@@ -43,6 +43,8 @@ import fs from "fs";
 import Chapter, {ActChapter, ChapterContentData, ChapterProps} from "./Chapter.js";
 import UserRepo from "../repositories/user.repository.js";
 import ChapterRepo from "../repositories/chapter.repository.js";
+import CharacterRepo from "../repositories/character.repository.js";
+import LocationRepo from "../repositories/location.repository.js";
 
 export interface BookProps{
     id:string;
@@ -97,6 +99,26 @@ export interface SyncedBook {
     aiGuideLine: SyncedAIGuideLine | null;
 }
 
+export interface BookSyncCompare {
+    id: string;
+    chapters: string[];
+    chapterContents: string[];
+    chapterInfos: string[];
+    characters: string[];
+    characterAttributes: string[];
+    locations: string[];
+    locationElements: string[];
+    locationSubElements: string[];
+    worlds: string[];
+    worldElements: string[];
+    incidents: string[];
+    plotPoints: string[];
+    issues: string[];
+    actSummaries: string[];
+    guideLine: boolean;
+    aiGuideLine: boolean;
+}
+
 export interface SyncedChapter {
     id: string;
     name: string;
@@ -617,7 +639,7 @@ export default class Book {
             if (actId === 1 || actId === 4 || actId === 5) {
                 const actSummary: string = act.summary ? System.encryptDataWithUserKey(act.summary, userKey) : '';
                 try {
-                    BookRepo.updateActSummary(userId, bookId, actId, actSummary,lang);
+                    BookRepo.updateActSummary(userId, bookId, actId, actSummary,System.timeStampInSeconds(),lang);
                 } catch (e: unknown) {
                     const actSummaryId: string = System.createUniqueId();
                     BookRepo.insertActSummary(actSummaryId, userId, bookId, actId, actSummary,lang);
@@ -632,7 +654,7 @@ export default class Book {
                     const incidentName: string = incident.title;
                     const incidentHashedName: string = System.hashElement(incidentName);
                     const encryptedIncidentName: string = System.encryptDataWithUserKey(incidentName, userKey);
-                    BookRepo.updateIncident(userId, bookId, incidentId, encryptedIncidentName, incidentHashedName, incidentSummary, lang);
+                    BookRepo.updateIncident(userId, bookId, incidentId, encryptedIncidentName, incidentHashedName, incidentSummary, System.timeStampInSeconds(), lang);
                     if (incident.chapters) {
                         Chapter.updateChapterInfos(incident.chapters, userId, actId, bookId, incidentId, null, lang);
                     }
@@ -645,7 +667,7 @@ export default class Book {
                     const plotPointName: string = plotPoint.title;
                     const plotPointHashedName: string = System.hashElement(plotPointName);
                     const encryptedPlotPointName: string = System.encryptDataWithUserKey(plotPointName, userKey);
-                    BookRepo.updatePlotPoint(userId, bookId, plotPointId, encryptedPlotPointName, plotPointHashedName, plotPointSummary, lang);
+                    BookRepo.updatePlotPoint(userId, bookId, plotPointId, encryptedPlotPointName, plotPointHashedName, plotPointSummary, System.timeStampInSeconds(), lang);
                     if (plotPoint.chapters) {
                         Chapter.updateChapterInfos(plotPoint.chapters, userId, actId, bookId, null, plotPointId, lang);
                     }
@@ -664,7 +686,7 @@ export default class Book {
             const chapterHashedTitle: string = System.hashElement(chapterTitle);
             const encryptedTitle: string = System.encryptDataWithUserKey(chapterTitle, userKey);
             const chapterOrder: number = chapter.chapterOrder;
-            ChapterRepo.updateChapter(userId, chapterId, encryptedTitle, chapterHashedTitle, chapterOrder, lang);
+            ChapterRepo.updateChapter(userId, chapterId, encryptedTitle, chapterHashedTitle, chapterOrder, System.timeStampInSeconds(), lang);
         }
         return true;
     }
@@ -849,7 +871,7 @@ export default class Book {
             }));
         });
 
-        BookRepo.updateWorld(userId, world.id, encryptName, System.hashElement(world.name), encryptHistory, encryptPolitics, encryptEconomy, encryptReligion, encryptLanguages, lang);
+        BookRepo.updateWorld(userId, world.id, encryptName, System.hashElement(world.name), encryptHistory, encryptPolitics, encryptEconomy, encryptReligion, encryptLanguages, System.timeStampInSeconds(), lang);
         return BookRepo.updateWorldElements(userId, elements, lang);
     }
 
@@ -1466,4 +1488,450 @@ export default class Book {
             return BookRepo.insertSyncIssue(issue.issue_id, userId, issue.book_id, encryptedIssueName, issue.hashed_issue_name, issue.last_update, lang);
         });
     }
+    
+    static async getCompleteSyncBook(userId: string, data: BookSyncCompare, lang: "fr" | "en"):Promise<CompleteBook> {
+        const userKey: string = getUserEncryptionKey(userId);
+        const bookData: EritBooksTable[] = [];
+        const chaptersData: BookChaptersTable[] = [];
+        const plotPointsData: BookPlotPointsTable[] = [];
+        const incidentsData: BookIncidentsTable[] = [];
+        const chapterContentsData: BookChapterContentTable[] = [];
+        const chapterInfosData: BookChapterInfosTable[] = [];
+        const charactersData: BookCharactersTable[] = [];
+        const characterAttributesData: BookCharactersAttributesTable[] = [];
+        const locationsData: BookLocationTable[] = [];
+        const locationElementsData: LocationElementTable[] = [];
+        const locationSubElementsData: LocationSubElementTable[] = [];
+        const worldsData: BookWorldTable[] = [];
+        const worldElementsData: BookWorldElementsTable[] = [];
+        const actSummariesData: BookActSummariesTable[] = [];
+        const guideLineData: BookGuideLineTable[] = [];
+        const aiGuideLineData: BookAIGuideLineTable[] = [];
+        const issuesData: BookIssuesTable[] = [];
+
+        const actSummaries: string[] = data.actSummaries;
+        const chapters: string[] = data.chapters;
+        const plotPoints: string[] = data.plotPoints;
+        const incidents: string[] = data.incidents;
+        const chapterContents: string[] = data.chapterContents;
+        const chapterInfos: string[] = data.chapterInfos;
+        const characters: string[] = data.characters;
+        const characterAttributes: string[] = data.characterAttributes;
+        const locations: string[] = data.locations;
+        const locationElements: string[] = data.locationElements;
+        const locationSubElements: string[] = data.locationSubElements;
+        const worlds: string[] = data.worlds;
+        const worldElements: string[] = data.worldElements;
+        const issues: string[] = data.issues;
+        
+        if (actSummaries && actSummaries.length > 0) {
+            for (const id of actSummaries) {
+                const actSummary: BookActSummariesTable[] = await BookRepo.fetchCompleteActSummaryById(id, lang);
+                if (actSummary.length>0) {
+                    const actSummaryData: BookActSummariesTable = actSummary[0];
+                    actSummariesData.push({
+                        ...actSummaryData,
+                        summary: actSummaryData.summary ? System.decryptDataWithUserKey(actSummaryData.summary, userKey) : null
+                    });
+                }
+            }
+        }
+
+        if (chapters && chapters.length > 0) {
+            for (const id of chapters) {
+                const chapter: BookChaptersTable[] = await BookRepo.fetchCompleteChapterById(id, lang);
+                if (chapter.length>0) {
+                    const chapterData: BookChaptersTable = chapter[0];
+                    chaptersData.push({
+                        ...chapterData,
+                        title: System.decryptDataWithUserKey(chapterData.title, userKey)
+                    });
+                }
+            }
+        }
+
+        if (plotPoints && plotPoints.length > 0) {
+            for (const id of plotPoints) {
+                const plotPoint: BookPlotPointsTable[] = await BookRepo.fetchCompletePlotPointById(id, lang);
+                if (plotPoint.length>0) {
+                    const plotPointData: BookPlotPointsTable = plotPoint[0];
+                    plotPointsData.push({
+                        ...plotPointData,
+                        title: System.decryptDataWithUserKey(plotPointData.title, userKey),
+                        summary: plotPointData.summary ? System.decryptDataWithUserKey(plotPointData.summary, userKey) : null
+                    });
+                }
+            }
+        }
+
+        if (incidents && incidents.length > 0) {
+            for (const id of incidents) {
+                const incident: BookIncidentsTable[] = await BookRepo.fetchCompleteIncidentById(id, lang);
+                if (incident.length>0) {
+                    const incidentData: BookIncidentsTable = incident[0];
+                    incidentsData.push({
+                        ...incidentData,
+                        title: System.decryptDataWithUserKey(incidentData.title, userKey),
+                        summary: incidentData.summary ? System.decryptDataWithUserKey(incidentData.summary, userKey) : null
+                    });
+                }
+            }
+        }
+
+        if (chapterContents && chapterContents.length > 0) {
+            for (const id of chapterContents) {
+                const chapterContent: BookChapterContentTable[] = await BookRepo.fetchCompleteChapterContentById(id, lang);
+                if (chapterContent.length>0) {
+                    const chapterContentData: BookChapterContentTable = chapterContent[0];
+                    chapterContentsData.push({
+                        ...chapterContentData,
+                        content: chapterContentData.content ? JSON.parse(System.decryptDataWithUserKey(chapterContentData.content, userKey)) : null
+                    });
+                }
+            }
+        }
+
+        if (chapterInfos && chapterInfos.length > 0) {
+            for (const id of chapterInfos) {
+                const chapterInfo: BookChapterInfosTable[] = await BookRepo.fetchCompleteChapterInfoById(id, lang);
+                if (chapterInfo.length>0) {
+                    const chapterInfoData: BookChapterInfosTable = chapterInfo[0];
+                    chapterInfosData.push({
+                        ...chapterInfoData,
+                        summary: chapterInfoData.summary ? System.decryptDataWithUserKey(chapterInfoData.summary, userKey) : null,
+                        goal: chapterInfoData.goal ? System.decryptDataWithUserKey(chapterInfoData.goal, userKey) : null
+                    });
+                }
+            }
+        }
+
+        if (characters && characters.length > 0) {
+            for (const id of characters) {
+                const character: BookCharactersTable[] = await BookRepo.fetchCompleteCharacterById(id, lang);
+                if (character.length>0) {
+                    const characterData: BookCharactersTable = character[0];
+                    charactersData.push({
+                        ...characterData,
+                        first_name: System.decryptDataWithUserKey(characterData.first_name, userKey),
+                        last_name: characterData.last_name ? System.decryptDataWithUserKey(characterData.last_name, userKey) : null,
+                        category: System.decryptDataWithUserKey(characterData.category, userKey),
+                        title: characterData.title ? System.decryptDataWithUserKey(characterData.title, userKey) : null,
+                        role: characterData.role ? System.decryptDataWithUserKey(characterData.role, userKey) : null,
+                        biography: characterData.biography ? System.decryptDataWithUserKey(characterData.biography, userKey) : null,
+                        history: characterData.history ? System.decryptDataWithUserKey(characterData.history, userKey) : null
+                    });
+                }
+            }
+        }
+
+        if (characterAttributes && characterAttributes.length > 0) {
+            for (const id of characterAttributes) {
+                const characterAttribute: BookCharactersAttributesTable[] = await BookRepo.fetchCompleteCharacterAttributeById(id, lang);
+                if (characterAttribute.length>0) {
+                    const characterAttributeData: BookCharactersAttributesTable = characterAttribute[0];
+                    characterAttributesData.push({
+                        ...characterAttributeData,
+                        attribute_name: System.decryptDataWithUserKey(characterAttributeData.attribute_name, userKey),
+                        attribute_value: System.decryptDataWithUserKey(characterAttributeData.attribute_value, userKey)
+                    });
+                }
+            }
+        }
+
+        if (locations && locations.length > 0) {
+            for (const id of locations) {
+                const location: BookLocationTable[] = await BookRepo.fetchCompleteLocationById(id, lang);
+                if (location.length>0) {
+                    const locationData: BookLocationTable = location[0];
+                    locationsData.push({
+                        ...locationData,
+                        loc_name: System.decryptDataWithUserKey(locationData.loc_name, userKey)
+                    });
+                }
+            }
+        }
+
+        if (locationElements && locationElements.length > 0) {
+            for (const id of locationElements) {
+                const locationElement: LocationElementTable[] = await BookRepo.fetchCompleteLocationElementById(id, lang);
+                if (locationElement.length>0) {
+                    const locationElementData: LocationElementTable = locationElement[0];
+                    locationElementsData.push({
+                        ...locationElementData,
+                        element_name: System.decryptDataWithUserKey(locationElementData.element_name, userKey),
+                        element_description: locationElementData.element_description ? System.decryptDataWithUserKey(locationElementData.element_description, userKey) : null
+                    });
+                }
+            }
+        }
+
+        if (locationSubElements && locationSubElements.length > 0) {
+            for (const id of locationSubElements) {
+                const locationSubElement: LocationSubElementTable[] = await BookRepo.fetchCompleteLocationSubElementById(id, lang);
+                if (locationSubElement.length>0) {
+                    const locationSubElementData: LocationSubElementTable = locationSubElement[0];
+                    locationSubElementsData.push({
+                        ...locationSubElementData,
+                        sub_elem_name: System.decryptDataWithUserKey(locationSubElementData.sub_elem_name, userKey),
+                        sub_elem_description: locationSubElementData.sub_elem_description ? System.decryptDataWithUserKey(locationSubElementData.sub_elem_description, userKey) : null
+                    });
+                }
+            }
+        }
+
+        if (worlds && worlds.length > 0) {
+            for (const id of worlds) {
+                const world: BookWorldTable[] = await BookRepo.fetchCompleteWorldById(id, lang);
+                if (world.length>0) {
+                    const worldData: BookWorldTable = world[0];
+                    worldsData.push({
+                        ...worldData,
+                        name: System.decryptDataWithUserKey(worldData.name, userKey),
+                        history: worldData.history ? System.decryptDataWithUserKey(worldData.history, userKey) : null,
+                        politics: worldData.politics ? System.decryptDataWithUserKey(worldData.politics, userKey) : null,
+                        economy: worldData.economy ? System.decryptDataWithUserKey(worldData.economy, userKey) : null,
+                        religion: worldData.religion ? System.decryptDataWithUserKey(worldData.religion, userKey) : null,
+                        languages: worldData.languages ? System.decryptDataWithUserKey(worldData.languages, userKey) : null
+                    });
+                }
+            }
+        }
+
+        if (worldElements && worldElements.length > 0) {
+            for (const id of worldElements) {
+                const worldElement: BookWorldElementsTable[] = await BookRepo.fetchCompleteWorldElementById(id, lang);
+                if (worldElement.length>0) {
+                    const worldElementData: BookWorldElementsTable = worldElement[0];
+                    worldElementsData.push({
+                        ...worldElementData,
+                        name: System.decryptDataWithUserKey(worldElementData.name, userKey),
+                        description: worldElementData.description ? System.decryptDataWithUserKey(worldElementData.description, userKey) : null
+                    });
+                }
+            }
+        }
+
+        if (issues && issues.length > 0) {
+            for (const id of issues) {
+                const issue: BookIssuesTable[] = await BookRepo.fetchCompleteIssueById(id, lang);
+                if (issue.length>0) {
+                    const issueData: BookIssuesTable = issue[0];
+                    issuesData.push({
+                        ...issueData,
+                        name: System.decryptDataWithUserKey(issueData.name, userKey)
+                    });
+                }
+            }
+        }
+        console.log(data.id)
+        const book: EritBooksTable[] = await BookRepo.fetchCompleteBookById(data.id, lang);
+        if (book.length>0) {
+            const bookDataItem: EritBooksTable = book[0];
+            bookData.push({
+                ...bookDataItem,
+                title: System.decryptDataWithUserKey(bookDataItem.title, userKey),
+                sub_title: bookDataItem.sub_title ? System.decryptDataWithUserKey(bookDataItem.sub_title, userKey) : null,
+                summary: bookDataItem.summary ? System.decryptDataWithUserKey(bookDataItem.summary, userKey) : null,
+                cover_image: bookDataItem.cover_image ? System.decryptDataWithUserKey(bookDataItem.cover_image, userKey) : null
+            });
+        }
+        return {
+            eritBooks: bookData,
+            chapters: chaptersData,
+            plotPoints: plotPointsData,
+            incidents: incidentsData,
+            chapterContents: chapterContentsData,
+            chapterInfos: chapterInfosData,
+            characters: charactersData,
+            characterAttributes: characterAttributesData,
+            locations: locationsData,
+            locationElements: locationElementsData,
+            locationSubElements: locationSubElementsData,
+            worlds: worldsData,
+            worldElements: worldElementsData,
+            actSummaries: actSummariesData,
+            guideLine: guideLineData,
+            aiGuideLine: aiGuideLineData,
+            issues: issuesData
+        };
+    }
+    
+    static async syncBookFromServerToClient(userId:string,completeBook: CompleteBook,lang:"fr"|"en"):Promise<boolean> {
+        const userKey: string = getUserEncryptionKey(userId);
+        const actSummaries: BookActSummariesTable[] = completeBook.actSummaries;
+        const chapters: BookChaptersTable[] = completeBook.chapters;
+        const plotPoints: BookPlotPointsTable[] = completeBook.plotPoints;
+        const incidents: BookIncidentsTable[] = completeBook.incidents;
+        const chapterContents: BookChapterContentTable[] = completeBook.chapterContents;
+        const chapterInfos: BookChapterInfosTable[] = completeBook.chapterInfos;
+        const characters: BookCharactersTable[] = completeBook.characters;
+        const characterAttributes: BookCharactersAttributesTable[] = completeBook.characterAttributes;
+        const locations: BookLocationTable[] = completeBook.locations;
+        const locationElements: LocationElementTable[] = completeBook.locationElements;
+        const locationSubElements: LocationSubElementTable[] = completeBook.locationSubElements;
+        const worlds: BookWorldTable[] = completeBook.worlds;
+        const worldElements: BookWorldElementsTable[] = completeBook.worldElements;
+        const issues: BookIssuesTable[] = completeBook.issues;
+        
+        const bookId: string = completeBook.eritBooks.length > 0 ? completeBook.eritBooks[0].book_id : '';
+        
+        if (actSummaries && actSummaries.length > 0) {
+            for (const actSummary of actSummaries) {
+                const summary: string = System.encryptDataWithUserKey(actSummary.summary ? actSummary.summary : '', userKey)
+                const updated: boolean = BookRepo.updateActSummary(userId, bookId, actSummary.act_index, summary, actSummary.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (chapters && chapters.length > 0) {
+            for (const chapter of chapters) {
+                const title: string = System.encryptDataWithUserKey(chapter.title, userKey)
+                const updated: boolean = ChapterRepo.updateChapter(userId, chapter.chapter_id, title, chapter.hashed_title, chapter.chapter_order, chapter.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (plotPoints && plotPoints.length > 0) {
+            for (const plotPoint of plotPoints) {
+                const title: string = System.encryptDataWithUserKey(plotPoint.title, userKey);
+                const summary: string = System.encryptDataWithUserKey(plotPoint.summary ? plotPoint.summary : '', userKey);
+                const updated: boolean = BookRepo.updatePlotPoint(userId, bookId, plotPoint.plot_point_id, title, plotPoint.hashed_title, summary, plotPoint.last_update,lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (incidents && incidents.length > 0) {
+            for (const incident of incidents) {
+                const title: string = System.encryptDataWithUserKey(incident.title, userKey);
+                const summary: string = System.encryptDataWithUserKey(incident.summary ? incident.summary : '', userKey);
+                const updated: boolean = BookRepo.updateIncident(userId, bookId, incident.incident_id, title, incident.hashed_title, summary, incident.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (chapterContents && chapterContents.length > 0) {
+            for (const chapterContent of chapterContents) {
+                const content: string = System.encryptDataWithUserKey(chapterContent.content ? JSON.stringify(chapterContent.content) : '', userKey);
+                const updated: boolean = ChapterRepo.updateChapterContent(userId, chapterContent.chapter_id, chapterContent.version, content, chapterContent.words_count, chapterContent.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (chapterInfos && chapterInfos.length > 0) {
+            for (const chapterInfo of chapterInfos) {
+                const summary: string = System.encryptDataWithUserKey(chapterInfo.summary ? chapterInfo.summary : '', userKey);
+                const goal: string = System.encryptDataWithUserKey(chapterInfo.goal ? chapterInfo.goal : '', userKey);
+                const updated: boolean = ChapterRepo.updateChapterInfos(userId, chapterInfo.chapter_id, chapterInfo.act_id, bookId,chapterInfo.incident_id, chapterInfo.plot_point_id, summary, goal, chapterInfo.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (characters && characters.length > 0) {
+            for (const character of characters) {
+                const firstName: string = System.encryptDataWithUserKey(character.first_name, userKey);
+                const lastName: string = System.encryptDataWithUserKey(character.last_name ? character.last_name : '', userKey);
+                const category: string = System.encryptDataWithUserKey(character.category, userKey);
+                const title: string = System.encryptDataWithUserKey(character.title ? character.title : '', userKey);
+                const role: string = System.encryptDataWithUserKey(character.role ? character.role : '', userKey);
+                const biography: string = System.encryptDataWithUserKey(character.biography ? character.biography : '', userKey);
+                const history: string = System.encryptDataWithUserKey(character.history ? character.history : '', userKey);
+                const updated: boolean = CharacterRepo.updateCharacter(userId, character.character_id, firstName, lastName, title, category, character.image || '', role, biography, history, character.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (characterAttributes && characterAttributes.length > 0) {
+            for (const characterAttribute of characterAttributes) {
+                const attributeName: string = System.encryptDataWithUserKey(characterAttribute.attribute_name, userKey);
+                const attributeValue: string = System.encryptDataWithUserKey(characterAttribute.attribute_value, userKey);
+                const updated: boolean = CharacterRepo.updateCharacterAttribute(userId, characterAttribute.attr_id, attributeName, attributeValue, characterAttribute.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (locations && locations.length > 0) {
+            for (const location of locations) {
+                const locName: string = System.encryptDataWithUserKey(location.loc_name, userKey);
+                const updated: boolean = LocationRepo.updateLocationSection(userId, location.loc_id, locName, location.loc_original_name, location.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (locationElements && locationElements.length > 0) {
+            for (const locationElement of locationElements) {
+                const elementName: string = System.encryptDataWithUserKey(locationElement.element_name, userKey);
+                const elementDescription: string = System.encryptDataWithUserKey(locationElement.element_description ? locationElement.element_description : '', userKey);
+                const updated: boolean = LocationRepo.updateLocationElement(userId, locationElement.element_id, elementName,locationElement.original_name, elementDescription, locationElement.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (locationSubElements && locationSubElements.length > 0) {
+            for (const locationSubElement of locationSubElements) {
+                const subElemName: string = System.encryptDataWithUserKey(locationSubElement.sub_elem_name, userKey);
+                const subElemDescription: string = System.encryptDataWithUserKey(locationSubElement.sub_elem_description ? locationSubElement.sub_elem_description : '', userKey);
+                const updated: boolean = LocationRepo.updateLocationSubElement(userId, locationSubElement.sub_element_id, subElemName, locationSubElement.original_name, subElemDescription, locationSubElement.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (worlds && worlds.length > 0) {
+            for (const world of worlds) {
+                const name: string = System.encryptDataWithUserKey(world.name, userKey);
+                const history: string = System.encryptDataWithUserKey(world.history ? world.history : '', userKey);
+                const politics: string = System.encryptDataWithUserKey(world.politics ? world.politics : '', userKey);
+                const economy: string = System.encryptDataWithUserKey(world.economy ? world.economy : '', userKey);
+                const religion: string = System.encryptDataWithUserKey(world.religion ? world.religion : '', userKey);
+                const languages: string = System.encryptDataWithUserKey(world.languages ? world.languages : '', userKey);
+                const updated: boolean = BookRepo.updateWorld(userId, world.world_id, name, world.hashed_name, history, politics, economy, religion, languages, world.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (worldElements && worldElements.length > 0) {
+            for (const worldElement of worldElements) {
+                const name: string = System.encryptDataWithUserKey(worldElement.name, userKey);
+                const description: string = System.encryptDataWithUserKey(worldElement.description ? worldElement.description : '', userKey);
+                const updated: boolean = BookRepo.updateWorldElement(userId, worldElement.element_id, name, description, worldElement.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        
+        if (issues && issues.length > 0) {
+            for (const issue of issues) {
+                const name: string = System.encryptDataWithUserKey(issue.name, userKey);
+                const updated: boolean = BookRepo.updateIssue(userId, bookId, issue.issue_id, name, issue.hashed_issue_name, issue.last_update, lang);
+                if (!updated) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
 }

electron/database/models/Chapter.ts

@@ -149,7 +149,7 @@ export default class Chapter {
             const response:string = await QS.request(prompt,'summary-chapter');
             console.log(response);
         }*/
-        return ChapterRepo.updateChapterContent(userId, chapterId, version, encryptContent, wordsCount, lang);
+        return ChapterRepo.updateChapterContent(userId, chapterId, version, encryptContent, wordsCount, System.timeStampInSeconds(), lang);
     }
 
     public static getLastChapter(userId: string, bookId: string, lang: 'fr' | 'en' = 'fr'): ChapterProps | null {
@@ -200,7 +200,7 @@ export default class Chapter {
         const hashedTitle: string = System.hashElement(title);
         const userKey: string = getUserEncryptionKey(userId);
         const encryptedTitle: string = System.encryptDataWithUserKey(title, userKey);
-        return ChapterRepo.updateChapter(userId, chapterId, encryptedTitle, hashedTitle, chapterOrder, lang);
+        return ChapterRepo.updateChapter(userId, chapterId, encryptedTitle, hashedTitle, chapterOrder, System.timeStampInSeconds(), lang);
     }
 
     static updateChapterInfos(chapters: ActChapter[], userId: string, actId: number, bookId: string, incidentId: string | null, plotId: string | null, lang: 'fr' | 'en' = 'fr') {
@@ -209,7 +209,7 @@ export default class Chapter {
             const summary: string = chapter.summary ? System.encryptDataWithUserKey(chapter.summary, userKey) : '';
             const goal: string = chapter.goal ? System.encryptDataWithUserKey(chapter.goal, userKey) : '';
             const chapterId: string = chapter.chapterId;
-            ChapterRepo.updateChapterInfos(userId, chapterId, actId, bookId, incidentId, plotId, summary, goal, lang);
+            ChapterRepo.updateChapterInfos(userId, chapterId, actId, bookId, incidentId, plotId, summary, goal, System.timeStampInSeconds(), lang);
         }
     }
 

electron/database/models/Character.ts

@@ -9,7 +9,7 @@ import {getUserEncryptionKey} from "../keyManager.js";
 export type CharacterCategory = 'Main' | 'Secondary' | 'Recurring';
 
 export interface CharacterPropsPost {
-    id: number | null;
+    id: string | null;
     name: string;
     lastName: string;
     category: CharacterCategory;
@@ -118,6 +118,9 @@ export default class Character {
 
     static updateCharacter(userId: string, character: CharacterPropsPost, lang: 'fr' | 'en' = 'fr'): boolean {
         const userKey: string = getUserEncryptionKey(userId);
+        if (!character.id) {
+            return false;
+        }
         const encryptedName: string = System.encryptDataWithUserKey(character.name, userKey);
         const encryptedLastName: string = System.encryptDataWithUserKey(character.lastName, userKey);
         const encryptedTitle: string = System.encryptDataWithUserKey(character.title, userKey);
@@ -126,7 +129,7 @@ export default class Character {
         const encryptedRole: string = System.encryptDataWithUserKey(character.role, userKey);
         const encryptedBiography: string = System.encryptDataWithUserKey(character.biography ? character.biography : '', userKey);
         const encryptedHistory: string = System.encryptDataWithUserKey(character.history ? character.history : '', userKey);
-        return CharacterRepo.updateCharacter(userId, character.id, encryptedName, encryptedLastName, encryptedTitle, encryptedCategory, encryptedImage, encryptedRole, encryptedBiography, encryptedHistory, lang);
+        return CharacterRepo.updateCharacter(userId, character.id, encryptedName, encryptedLastName, encryptedTitle, encryptedCategory, encryptedImage, encryptedRole, encryptedBiography, encryptedHistory, System.timeStampInSeconds(), lang);
     }
 
     static addNewAttribute(characterId: string, userId: string, type: string, name: string, lang: 'fr' | 'en' = 'fr'): string {

electron/database/models/Location.ts

@@ -118,17 +118,17 @@ export default class Location {
         for (const location of locations) {
             const originalName: string = System.hashElement(location.name);
             const encryptedName: string = System.encryptDataWithUserKey(location.name, userKey);
-            LocationRepo.updateLocationSection(userId, location.id, encryptedName, originalName, lang)
+            LocationRepo.updateLocationSection(userId, location.id, encryptedName, originalName, System.timeStampInSeconds(),lang)
             for (const element of location.elements) {
                 const originalName: string = System.hashElement(element.name);
                 const encryptedName: string = System.encryptDataWithUserKey(element.name, userKey);
                 const encryptDescription: string = element.description ? System.encryptDataWithUserKey(element.description, userKey) : '';
-                LocationRepo.updateLocationElement(userId, element.id, encryptedName, originalName, encryptDescription, lang)
+                LocationRepo.updateLocationElement(userId, element.id, encryptedName, originalName, encryptDescription, System.timeStampInSeconds(), lang)
                 for (const subElement of element.subElements) {
                     const originalName: string = System.hashElement(subElement.name);
                     const encryptedName: string = System.encryptDataWithUserKey(subElement.name, userKey);
                     const encryptDescription: string = subElement.description ? System.encryptDataWithUserKey(subElement.description, userKey) : '';
-                    LocationRepo.updateLocationSubElement(userId, subElement.id, encryptedName, originalName, encryptDescription, lang)
+                    LocationRepo.updateLocationSubElement(userId, subElement.id, encryptedName, originalName, encryptDescription,System.timeStampInSeconds(),lang)
                 }
             }
         }

electron/database/repositories/book.repository.ts

@@ -63,9 +63,9 @@ export interface BookChaptersTable extends Record<string, SQLiteValue> {
     book_id: string;
     author_id: string;
     title: string;
-    hashed_title: string | null;
+    hashed_title: string;
     words_count: number | null;
-    chapter_order: number | null;
+    chapter_order: number;
     last_update: number;
 }
 
@@ -83,7 +83,7 @@ export interface BookChapterContentTable extends Record<string, SQLiteValue> {
 export interface BookChapterInfosTable extends Record<string, SQLiteValue> {
     chapter_info_id: string;
     chapter_id: string;
-    act_id: number | null;
+    act_id: number;
     incident_id: string | null;
     plot_point_id: string | null;
     book_id: string;
@@ -626,10 +626,10 @@ export default class BookRepo {
         }
     }
     
-    public static updateActSummary(userId: string, bookId: string, actId: number, summary: string, lang: 'fr' | 'en'): boolean {
+    public static updateActSummary(userId: string, bookId: string, actId: number, summary: string, lastUpdate: number, lang: 'fr' | 'en'): boolean {
         try {
             const db: Database = System.getDb();
-            const result: RunResult = db.run('UPDATE book_act_summaries SET summary=?, last_update=? WHERE user_id=? AND book_id=? AND act_sum_id=?', [summary, System.timeStampInSeconds(), userId, bookId, actId]);
+            const result: RunResult = db.run('UPDATE book_act_summaries SET summary=?, last_update=? WHERE user_id=? AND book_id=? AND act_sum_id=?', [summary, lastUpdate, userId, bookId, actId]);
             return result.changes > 0;
         } catch (e: unknown) {
             if (e instanceof Error) {
@@ -782,10 +782,10 @@ export default class BookRepo {
         }
     }
 
-    public static updateIncident(userId: string, bookId: string, incidentId: string, encryptedIncidentName: string, incidentHashedName: string, incidentSummary: string, lang: 'fr' | 'en'): boolean {
+    public static updateIncident(userId: string, bookId: string, incidentId: string, encryptedIncidentName: string, incidentHashedName: string, incidentSummary: string, lastUpdate: number, lang: 'fr' | 'en'): boolean {
         try {
             const db: Database = System.getDb();
-            const result: RunResult = db.run('UPDATE book_incidents SET title=?, hashed_title=?, summary=?, last_update=? WHERE author_id=? AND book_id=? AND incident_id=?', [encryptedIncidentName, incidentHashedName, incidentSummary, System.timeStampInSeconds(), userId, bookId, incidentId]);
+            const result: RunResult = db.run('UPDATE book_incidents SET title=?, hashed_title=?, summary=?, last_update=? WHERE author_id=? AND book_id=? AND incident_id=?', [encryptedIncidentName, incidentHashedName, incidentSummary, lastUpdate, userId, bookId, incidentId]);
             return result.changes > 0;
         } catch (e: unknown) {
             if (e instanceof Error) {
@@ -798,10 +798,10 @@ export default class BookRepo {
         }
     }
 
-    public static updatePlotPoint(userId: string, bookId: string, plotPointId: string, encryptedPlotPointName: string, plotPointHashedName: string, plotPointSummary: string, lang: 'fr' | 'en'): boolean {
+    public static updatePlotPoint(userId: string, bookId: string, plotPointId: string, encryptedPlotPointName: string, plotPointHashedName: string, plotPointSummary: string, lastUpdate:number, lang: 'fr' | 'en'): boolean {
         try {
             const db: Database = System.getDb();
-            const result: RunResult = db.run('UPDATE book_plot_points SET title=?, hashed_title=?, summary=?, last_update=? WHERE author_id=? AND book_id=? AND plot_point_id=?', [encryptedPlotPointName, plotPointHashedName, plotPointSummary, System.timeStampInSeconds(), userId, bookId, plotPointId]);
+            const result: RunResult = db.run('UPDATE book_plot_points SET title=?, hashed_title=?, summary=?, last_update=? WHERE author_id=? AND book_id=? AND plot_point_id=?', [encryptedPlotPointName, plotPointHashedName, plotPointSummary, lastUpdate, userId, bookId, plotPointId]);
             return result.changes > 0;
         } catch (e: unknown) {
             if (e instanceof Error) {
@@ -863,10 +863,10 @@ export default class BookRepo {
         }
     }
     
-    public static updateWorld(userId: string, worldId: string, encryptName: string, hashedName: string, encryptHistory: string, encryptPolitics: string, encryptEconomy: string, encryptReligion: string, encryptLanguages: string, lang: 'fr' | 'en'): boolean {
+    public static updateWorld(userId: string, worldId: string, encryptName: string, hashedName: string, encryptHistory: string, encryptPolitics: string, encryptEconomy: string, encryptReligion: string, encryptLanguages: string, lastUpdate: number, lang: 'fr' | 'en'): boolean {
         try {
             const db: Database = System.getDb();
-            const result: RunResult = db.run('UPDATE book_world SET name=?, hashed_name=?, history=?, politics=?, economy=?, religion=?, languages=?, last_update=? WHERE author_id=? AND world_id=?', [encryptName, hashedName, encryptHistory, encryptPolitics, encryptEconomy, encryptReligion, encryptLanguages, System.timeStampInSeconds(), userId, worldId]);
+            const result: RunResult = db.run('UPDATE book_world SET name=?, hashed_name=?, history=?, politics=?, economy=?, religion=?, languages=?, last_update=? WHERE author_id=? AND world_id=?', [encryptName, hashedName, encryptHistory, encryptPolitics, encryptEconomy, encryptReligion, encryptLanguages, lastUpdate, userId, worldId]);
             return result.changes > 0;
         } catch (e: unknown) {
             if (e instanceof Error) {
@@ -1809,4 +1809,309 @@ export default class BookRepo {
             }
         }
     }
+    
+    static async fetchCompleteActSummaryById(id: string, lang: "fr" | "en"):Promise<BookActSummariesTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT act_sum_id, book_id, user_id, act_index, summary, last_update
+                 FROM book_act_summaries
+                 WHERE act_sum_id = ?`,
+                [id]
+            ) as BookActSummariesTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer le résumé d'acte complet.` : `Unable to retrieve complete act summary.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteChapterById(id: string, lang: "fr" | "en"):Promise<BookChaptersTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT chapter_id, book_id, author_id, title, hashed_title, words_count, chapter_order, last_update
+                 FROM book_chapters
+                 WHERE chapter_id = ?`,
+                [id]
+            ) as BookChaptersTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer le chapitre complet.` : `Unable to retrieve complete chapter.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompletePlotPointById(id: string, lang: "fr" | "en"):Promise<BookPlotPointsTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT plot_point_id, title, hashed_title, summary, linked_incident_id, author_id, book_id, last_update
+                 FROM book_plot_points
+                 WHERE plot_point_id = ?`,
+                [id]
+            ) as BookPlotPointsTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer le point d'intrigue complet.` : `Unable to retrieve complete plot point.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteIncidentById(id: string, lang: "fr" | "en"):Promise<BookIncidentsTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT incident_id, author_id, book_id, title, hashed_title, summary, last_update
+                 FROM book_incidents
+                 WHERE incident_id = ?`,
+                [id]
+            ) as BookIncidentsTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer l'incident complet.` : `Unable to retrieve complete incident.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteChapterContentById(id: string, lang: "fr" | "en"):Promise<BookChapterContentTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT content_id, chapter_id, author_id, version, content, words_count, time_on_it, last_update
+                 FROM book_chapter_content
+                 WHERE content_id = ?`,
+                [id]
+            ) as BookChapterContentTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer le contenu de chapitre complet.` : `Unable to retrieve complete chapter content.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteChapterInfoById(id: string, lang: "fr" | "en"):Promise<BookChapterInfosTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT chapter_info_id, chapter_id, act_id, incident_id, plot_point_id, book_id, author_id, summary, goal, last_update
+                 FROM book_chapter_infos
+                 WHERE chapter_info_id = ?`,
+                [id]
+            ) as BookChapterInfosTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer les informations de chapitre complètes.` : `Unable to retrieve complete chapter info.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteCharacterById(id: string, lang: "fr" | "en"):Promise<BookCharactersTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT character_id, book_id, user_id, first_name, last_name, category, title, image, role, biography, history, last_update
+                 FROM book_characters
+                 WHERE character_id = ?`,
+                [id]
+            ) as BookCharactersTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer le personnage complet.` : `Unable to retrieve complete character.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteCharacterAttributeById(id: string, lang: "fr" | "en"):Promise<BookCharactersAttributesTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT attr_id, character_id, user_id, attribute_name, attribute_value, last_update
+                 FROM book_characters_attributes
+                 WHERE attr_id = ?`,
+                [id]
+            ) as BookCharactersAttributesTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer l'attribut de personnage complet.` : `Unable to retrieve complete character attribute.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteLocationById(id: string, lang: "fr" | "en"):Promise<BookLocationTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT loc_id, book_id, user_id, loc_name, loc_original_name, last_update
+                 FROM book_location
+                 WHERE loc_id = ?`,
+                [id]
+            ) as BookLocationTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer le lieu complet.` : `Unable to retrieve complete location.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteLocationElementById(id: string, lang: "fr" | "en"):Promise<LocationElementTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT element_id, location, user_id, element_name, original_name, element_description, last_update
+                 FROM location_element
+                 WHERE element_id = ?`,
+                [id]
+            ) as LocationElementTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer l'élément de lieu complet.` : `Unable to retrieve complete location element.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteLocationSubElementById(id: string, lang: "fr" | "en"):Promise<LocationSubElementTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT sub_element_id, element_id, user_id, sub_elem_name, original_name, sub_elem_description, last_update
+                 FROM location_sub_element
+                 WHERE sub_element_id = ?`,
+                [id]
+            ) as LocationSubElementTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer le sous-élément de lieu complet.` : `Unable to retrieve complete location sub-element.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteWorldById(id: string, lang: "fr" | "en"):Promise<BookWorldTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT world_id, name, hashed_name, author_id, book_id, history, politics, economy, religion, languages, last_update
+                 FROM book_world
+                 WHERE world_id = ?`,
+                [id]
+            ) as BookWorldTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer le monde complet.` : `Unable to retrieve complete world.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteWorldElementById(id: string, lang: "fr" | "en"):Promise<BookWorldElementsTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT element_id, world_id, user_id, element_type, name, original_name, description, last_update
+                 FROM book_world_elements
+                 WHERE element_id = ?`,
+                [id]
+            ) as BookWorldElementsTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer l'élément de monde complet.` : `Unable to retrieve complete world element.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+
+    static async fetchCompleteIssueById(id: string, lang: "fr" | "en"):Promise<BookIssuesTable[]> {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT issue_id, author_id, book_id, name, hashed_issue_name, last_update
+                 FROM book_issues
+                 WHERE issue_id = ?`,
+                [id]
+            ) as BookIssuesTable[];
+        } catch (e:unknown){
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer le problème complet.` : `Unable to retrieve complete issue.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+    
+    static async fetchCompleteBookById(bookId: string, lang: "fr" | "en") {
+        try {
+            const db: Database = System.getDb();
+            return db.all(
+                `SELECT * FROM erit_books
+                 WHERE book_id = ?`,
+                [bookId]
+            ) as EritBooksTable[];
+        } catch (e: unknown) {
+            if (e instanceof Error) {
+                throw new Error(lang === 'fr' ? `Impossible de récupérer le livre complet.` : `Unable to retrieve complete book.`);
+            } else {
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+    
+    static updateWorldElement(userId: string, elementId: string, name: string, description: string, lastUpdate: number,lang: "fr" | "en"):boolean {
+        try {
+            const db: Database = System.getDb();
+            const query:string = `UPDATE book_world_elements SET name = ?, description = ?, last_update = FROM_UNIXTIME(?) WHERE element_id = UUID_TO_BIN(?) AND user_id = UUID_TO_BIN(?)`;
+            const params:(string|number)[] = [name, description, lastUpdate, elementId, userId];
+            const result:RunResult = db.run(query, params);
+            return result.changes > 0;
+        } catch (e:unknown) {
+            if (e instanceof Error) {
+                console.error(`DB Error: ${e.message}`);
+                throw new Error(lang === 'fr' ? `Impossible de mettre à jour l'élément du monde.` : `Unable to update world element.`);
+            } else {
+                console.error("An unknown error occurred.");
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
+    
+    static updateIssue(userId: string, bookId: string, issueId: string, name: string, hashedName: string, lastUpdate: number, lang: "fr" | "en"):boolean {
+        try {
+            const db: Database = System.getDb();
+            const query:string = `UPDATE book_issues SET name = ?, hashed_issue_name = ?, last_update = FROM_UNIXTIME(?) WHERE issue_id = UUID_TO_BIN(?) AND author_id = UUID_TO_BIN(?) AND book_id = UUID_TO_BIN(?)`;
+            const params:(string|number)[] = [name, hashedName, lastUpdate, issueId, userId, bookId];
+            const result:RunResult = db.run(query, params);
+            return result.changes > 0;
+        } catch (e:unknown) {
+            if (e instanceof Error) {
+                console.error(`DB Error: ${e.message}`);
+                throw new Error(lang === 'fr' ? `Impossible de mettre à jour la problématique.` : `Unable to update issue.`);
+            } else {
+                console.error("An unknown error occurred.");
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
 }

electron/database/repositories/chapter.repository.ts

@@ -212,10 +212,10 @@ export default class ChapterRepo{
         return chapterInfoId;
     }
     
-    public static updateChapter(userId: string, chapterId: string, encryptedTitle: string, hashTitle: string, chapterOrder: number, lang: 'fr' | 'en' = 'fr'): boolean {
+    public static updateChapter(userId: string, chapterId: string, encryptedTitle: string, hashTitle: string, chapterOrder: number, lastUpdate:number, lang: 'fr' | 'en' = 'fr'): boolean {
         try {
             const db: Database = System.getDb();
-            const result: RunResult = db.run('UPDATE book_chapters SET title=?, hashed_title=?, chapter_order=?, last_update=? WHERE author_id=? AND chapter_id=?', [encryptedTitle, hashTitle, chapterOrder, System.timeStampInSeconds(), userId, chapterId]);
+            const result: RunResult = db.run('UPDATE book_chapters SET title=?, hashed_title=?, chapter_order=?, last_update=? WHERE author_id=? AND chapter_id=?', [encryptedTitle, hashTitle, chapterOrder, lastUpdate, userId, chapterId]);
             return result.changes > 0;
         } catch (e: unknown) {
             if (e instanceof Error) {
@@ -228,16 +228,17 @@ export default class ChapterRepo{
         }
     }
 
-    public static updateChapterInfos(userId: string, chapterId: string, actId: number, bookId: string, incidentId: string | null, plotId: string | null, summary: string, goal: string | null, lang: 'fr' | 'en' = 'fr'): boolean {
+    public static updateChapterInfos(userId: string, chapterId: string, actId: number, bookId: string, incidentId: string | null, plotId: string | null, summary: string, goal: string | null, lastUpdate: number, lang: 'fr' | 'en' = 'fr'): boolean {
         try {
             const db: Database = System.getDb();
             let sql: string = `UPDATE book_chapter_infos
                                SET summary=?,
-                                   goal=?
+                                   goal=?,
+                                   last_update=?
                                WHERE chapter_id = ?
                                  AND act_id = ?
                                  AND book_id = ?`;
-            const params: any[] = [summary, goal, chapterId, actId, bookId];
+            const params: any[] = [summary, goal, lastUpdate, chapterId, actId, bookId];
             if (incidentId) {
                 sql += ` AND incident_id=?`;
                 params.push(incidentId);
@@ -265,15 +266,15 @@ export default class ChapterRepo{
         }
     }
 
-    public static updateChapterContent(userId: string, chapterId: string, version: number, encryptContent: string, wordsCount: number, lang: 'fr' | 'en' = 'fr'): boolean {
+    public static updateChapterContent(userId: string, chapterId: string, version: number, encryptContent: string, wordsCount: number, lastUpdate: number, lang: 'fr' | 'en' = 'fr'): boolean {
         try {
             const db: Database = System.getDb();
-            const result: RunResult = db.run('UPDATE book_chapter_content SET content=?, words_count=?, last_update=? WHERE chapter_id=? AND author_id=? AND version=?', [encryptContent, wordsCount, System.timeStampInSeconds(), chapterId, userId, version]);
+            const result: RunResult = db.run('UPDATE book_chapter_content SET content=?, words_count=?, last_update=? WHERE chapter_id=? AND author_id=? AND version=?', [encryptContent, wordsCount, lastUpdate, chapterId, userId, version]);
             if (result.changes > 0) {
                 return true;
             } else {
                 const contentId:string = System.createUniqueId();
-                const insertResult: RunResult = db.run('INSERT INTO book_chapter_content (content_id,chapter_id, author_id, version, content, words_count, last_update) VALUES (?,?,?,?,?,?,?)', [contentId, chapterId, userId, version, encryptContent, wordsCount, System.timeStampInSeconds()]);
+                const insertResult: RunResult = db.run('INSERT INTO book_chapter_content (content_id,chapter_id, author_id, version, content, words_count, last_update) VALUES (?,?,?,?,?,?,?)', [contentId, chapterId, userId, version, encryptContent, wordsCount, lastUpdate]);
                 return insertResult.changes > 0;
             }
         } catch (e: unknown) {

electron/database/repositories/character.repository.ts

@@ -90,10 +90,10 @@ export default class CharacterRepo {
         return attributeId;
     }
 
-    static updateCharacter(userId: string, id: number | null, encryptedName: string, encryptedLastName: string, encryptedTitle: string, encryptedCategory: string, encryptedImage: string, encryptedRole: string, encryptedBiography: string, encryptedHistory: string, lang: 'fr' | 'en' = 'fr'): boolean {
+    static updateCharacter(userId: string, id: string, encryptedName: string, encryptedLastName: string, encryptedTitle: string, encryptedCategory: string, encryptedImage: string, encryptedRole: string, encryptedBiography: string, encryptedHistory: string, lastUpdate: number, lang: 'fr' | 'en' = 'fr'): boolean {
         try {
             const db: Database = System.getDb();
-            const result: RunResult = db.run('UPDATE `book_characters` SET `first_name`=?,`last_name`=?,`title`=?,`category`=?,`image`=?,`role`=?,`biography`=?,`history`=?,`last_update`=? WHERE `character_id`=? AND `user_id`=?', [encryptedName, encryptedLastName, encryptedTitle, encryptedCategory, encryptedImage, encryptedRole, encryptedBiography, encryptedHistory, System.timeStampInSeconds(), id, userId]);
+            const result: RunResult = db.run('UPDATE `book_characters` SET `first_name`=?,`last_name`=?,`title`=?,`category`=?,`image`=?,`role`=?,`biography`=?,`history`=?,`last_update`=? WHERE `character_id`=? AND `user_id`=?', [encryptedName, encryptedLastName, encryptedTitle, encryptedCategory, encryptedImage, encryptedRole, encryptedBiography, encryptedHistory, lastUpdate, id, userId]);
             return result.changes > 0;
         } catch (e: unknown) {
             if (e instanceof Error) {
@@ -165,4 +165,19 @@ export default class CharacterRepo {
         }
         return result;
     }
+    static updateCharacterAttribute(userId: string, characterAttributeId: string, attributeName: string, attributeValue: string, lastUpdate: number,lang: "fr" | "en"):boolean {
+        try {
+            const db: Database = System.getDb();
+            const result:RunResult = db.run('UPDATE `book_characters_attributes` SET `attribute_name`=?,`attribute_value`=?, last_update=FROM_UNIXTIME(?) WHERE `attr_id`=UUID_TO_BIN(?) AND `user_id`=UUID_TO_BIN(?)', [attributeName, attributeValue, lastUpdate, characterAttributeId, userId]);
+            return result.changes > 0;
+        } catch (e: unknown) {
+            if (e instanceof Error) {
+                console.error(`DB Error: ${e.message}`);
+                throw new Error(lang === 'fr' ? `Impossible de mettre à jour l'attribut du personnage.` : `Unable to update character attribute.`);
+            } else {
+                console.error("An unknown error occurred.");
+                throw new Error(lang === 'fr' ? "Une erreur inconnue s'est produite." : "An unknown error occurred.");
+            }
+        }
+    }
 }

electron/database/repositories/location.repository.ts

@@ -107,10 +107,10 @@ export default class LocationRepo {
         return subElementId;
     }
 
-    static updateLocationSubElement(userId: string, id: string, encryptedName: string, originalName: string, encryptDescription: string, lang: 'fr' | 'en' = 'fr'): boolean {
+    static updateLocationSubElement(userId: string, id: string, encryptedName: string, originalName: string, encryptDescription: string, lastUpdate: number, lang: 'fr' | 'en' = 'fr'): boolean {
         try {
             const db: Database = System.getDb();
-            const result: RunResult = db.run('UPDATE location_sub_element SET sub_elem_name=?, original_name=?, sub_elem_description=?, last_update=? WHERE sub_element_id=? AND user_id=?', [encryptedName, originalName, encryptDescription, System.timeStampInSeconds(), id, userId]);
+            const result: RunResult = db.run('UPDATE location_sub_element SET sub_elem_name=?, original_name=?, sub_elem_description=?, last_update=? WHERE sub_element_id=? AND user_id=?', [encryptedName, originalName, encryptDescription, lastUpdate, id, userId]);
             return result.changes > 0;
         } catch (e: unknown) {
             if (e instanceof Error) {
@@ -123,10 +123,10 @@ export default class LocationRepo {
         }
     }
 
-    static updateLocationElement(userId: string, id: string, encryptedName: string, originalName: string, encryptedDescription: string, lang: 'fr' | 'en' = 'fr'): boolean {
+    static updateLocationElement(userId: string, id: string, encryptedName: string, originalName: string, encryptedDescription: string, lastUpdate: number, lang: 'fr' | 'en' = 'fr'): boolean {
         try {
             const db: Database = System.getDb();
-            const result: RunResult = db.run('UPDATE location_element SET element_name=?, original_name=?, element_description=?, last_update=? WHERE element_id=? AND user_id=?', [encryptedName, originalName, encryptedDescription, System.timeStampInSeconds(), id, userId]);
+            const result: RunResult = db.run('UPDATE location_element SET element_name=?, original_name=?, element_description=?, last_update=? WHERE element_id=? AND user_id=?', [encryptedName, originalName, encryptedDescription, lastUpdate, id, userId]);
             return result.changes > 0;
         } catch (e: unknown) {
             if (e instanceof Error) {
@@ -139,10 +139,10 @@ export default class LocationRepo {
         }
     }
 
-    static updateLocationSection(userId: string, id: string, encryptedName: string, originalName: string, lang: 'fr' | 'en' = 'fr'): boolean {
+    static updateLocationSection(userId: string, id: string, encryptedName: string, originalName: string, lastUpdate: number, lang: 'fr' | 'en' = 'fr'): boolean {
         try {
             const db: Database = System.getDb();
-            const result: RunResult = db.run('UPDATE book_location SET loc_name=?, loc_original_name=?, last_update=? WHERE loc_id=? AND user_id=?', [encryptedName, originalName, System.timeStampInSeconds(), id, userId]);
+            const result: RunResult = db.run('UPDATE book_location SET loc_name=?, loc_original_name=?, last_update=? WHERE loc_id=? AND user_id=?', [encryptedName, originalName, lastUpdate, id, userId]);
             return result.changes > 0;
         } catch (e: unknown) {
             if (e instanceof Error) {

electron/ipc/book.ipc.ts

@@ -1,6 +1,6 @@
 import { ipcMain } from 'electron';
 import { createHandler } from '../database/LocalSystem.js';
-import Book, {CompleteBook, SyncedBook} from '../database/models/Book.js';
+import Book, {BookSyncCompare, CompleteBook, SyncedBook} from '../database/models/Book.js';
 import type { BookProps, GuideLine, GuideLineAI, Act, Issue, WorldProps } from '../database/models/Book.js';
 import Chapter from '../database/models/Chapter.js';
 import type { ChapterProps } from '../database/models/Chapter.js';
@@ -130,6 +130,22 @@ ipcMain.handle('db:book:updateBasicInformation', createHandler<UpdateBookBasicDa
     )
 );
 
+// GET /book/sync/to-client - Get book data to sync to client
+ipcMain.handle('db:book:sync:toServer', createHandler<BookSyncCompare, CompleteBook>(
+        async function(userId: string, data:BookSyncCompare, lang: 'fr' | 'en'):Promise<CompleteBook> {
+            return await Book.getCompleteSyncBook(userId, data, lang);
+        }
+    )
+);
+
+// GET /book/sync/from-server - Get book data to sync from server
+ipcMain.handle('db:book:sync:toClient', createHandler<CompleteBook, boolean>(
+        async function(userId: string, data:CompleteBook,  lang: 'fr' | 'en'):Promise<boolean> {
+            return await Book.syncBookFromServerToClient(userId, data, lang);
+        }
+    )
+);
+
 // GET /book/guide-line - Get guideline
 ipcMain.handle('db:book:guideline:get',
     createHandler<GetGuidelineData, GuideLine | null>(async function(userId: string, data: GetGuidelineData, lang: 'fr' | 'en') {

lib/errors.ts

@@ -0,0 +1,14 @@
+/**
+ * Clean error messages from Electron IPC prefix
+ * Transforms: "Error invoking remote method 'channel': Error: Message"
+ * Into: "Message"
+ */
+export function cleanErrorMessage(error: unknown): string {
+    if (error instanceof Error) {
+        return error.message.replace(/^Error invoking remote method '[^']+': Error: /, '');
+    }
+    if (typeof error === 'string') {
+        return error.replace(/^Error invoking remote method '[^']+': Error: /, '');
+    }
+    return 'An unknown error occurred';
+}

lib/models/Book.ts

@@ -164,11 +164,11 @@ export default class Book {
     constructor() {
     }
     
-    static booksToSelectBox(books: BookProps[]): SelectBoxProps[] {
+    static booksToSelectBox(books: SyncedBook[]): SelectBoxProps[] {
-        return books.map((book: BookProps) => {
+        return books.map((book: SyncedBook):SelectBoxProps => {
             return {
                 label: book.title,
-                value: book.bookId,
+                value: book.id,
             }
         });
     }

lib/models/BookTables.ts

@@ -12,6 +12,7 @@ export interface EritBooksTable {
     desired_word_count:number|null;
     words_count:number|null;
     cover_image:string|null;
+    last_update:number;
 }
 
 export interface BookActSummariesTable {
@@ -20,6 +21,7 @@ export interface BookActSummariesTable {
     user_id: string;
     act_index: number;
     summary: string | null;
+    last_update: number;
 }
 
 export interface BookAIGuideLineTable {
@@ -41,9 +43,10 @@ export interface BookChaptersTable {
     book_id: string;
     author_id: string;
     title: string;
-    hashed_title: string | null;
+    hashed_title: string;
     words_count: number | null;
-    chapter_order: number | null;
+    chapter_order: number;
+    last_update: number;
 }
 
 export interface BookChapterContentTable {
@@ -54,18 +57,20 @@ export interface BookChapterContentTable {
     content: string | null;
     words_count: number;
     time_on_it: number;
+    last_update: number;
 }
 
 export interface BookChapterInfosTable {
     chapter_info_id: string;
     chapter_id: string;
-    act_id: number | null;
+    act_id: number;
     incident_id: string | null;
     plot_point_id: string | null;
     book_id: string;
     author_id: string;
     summary: string | null;
     goal: string | null;
+    last_update: number;
 }
 
 export interface BookCharactersTable {
@@ -80,6 +85,7 @@ export interface BookCharactersTable {
     role: string | null;
     biography: string | null;
     history: string | null;
+    last_update: number;
 }
 
 export interface BookCharactersAttributesTable {
@@ -88,6 +94,7 @@ export interface BookCharactersAttributesTable {
     user_id: string;
     attribute_name: string;
     attribute_value: string;
+    last_update: number;
 }
 
 export interface BookGuideLineTable {
@@ -112,6 +119,7 @@ export interface BookIncidentsTable {
     title: string;
     hashed_title: string;
     summary: string | null;
+    last_update: number;
 }
 
 export interface BookIssuesTable {
@@ -120,6 +128,7 @@ export interface BookIssuesTable {
     book_id: string;
     name: string;
     hashed_issue_name: string;
+    last_update: number;
 }
 
 export interface BookLocationTable {
@@ -128,6 +137,7 @@ export interface BookLocationTable {
     user_id: string;
     loc_name: string;
     loc_original_name: string;
+    last_update: number;
 }
 
 export interface BookPlotPointsTable {
@@ -138,6 +148,7 @@ export interface BookPlotPointsTable {
     linked_incident_id: string | null;
     author_id: string;
     book_id: string;
+    last_update: number;
 }
 
 export interface BookWorldTable {
@@ -151,6 +162,7 @@ export interface BookWorldTable {
     economy: string | null;
     religion: string | null;
     languages: string | null;
+    last_update: number;
 }
 
 export interface BookWorldElementsTable {
@@ -161,6 +173,7 @@ export interface BookWorldElementsTable {
     name: string;
     original_name: string;
     description: string | null;
+    last_update: number;
 }
 
 export interface LocationElementTable {
@@ -170,6 +183,7 @@ export interface LocationElementTable {
     element_name: string;
     original_name: string;
     element_description: string | null;
+    last_update: number;
 }
 
 export interface LocationSubElementTable {
@@ -179,4 +193,5 @@ export interface LocationSubElementTable {
     sub_elem_name: string;
     original_name: string;
     sub_elem_description: string | null;
+    last_update: number;
 }

lib/models/SyncedBook.ts

@@ -110,3 +110,231 @@ export interface SyncedGuideLine {
 export interface SyncedAIGuideLine {
     lastUpdate: number;
 }
+
+export interface BookSyncCompare {
+    id: string;
+    chapters: string[];
+    chapterContents: string[];
+    chapterInfos: string[];
+    characters: string[];
+    characterAttributes: string[];
+    locations: string[];
+    locationElements: string[];
+    locationSubElements: string[];
+    worlds: string[];
+    worldElements: string[];
+    incidents: string[];
+    plotPoints: string[];
+    issues: string[];
+    actSummaries: string[];
+    guideLine: boolean;
+    aiGuideLine: boolean;
+}
+
+export function compareBookSyncs(newerBook: SyncedBook, olderBook: SyncedBook): BookSyncCompare | null {
+    const changedChapterIds: string[] = [];
+    const changedChapterContentIds: string[] = [];
+    const changedChapterInfoIds: string[] = [];
+    const changedCharacterIds: string[] = [];
+    const changedCharacterAttributeIds: string[] = [];
+    const changedLocationIds: string[] = [];
+    const changedLocationElementIds: string[] = [];
+    const changedLocationSubElementIds: string[] = [];
+    const changedWorldIds: string[] = [];
+    const changedWorldElementIds: string[] = [];
+    const changedIncidentIds: string[] = [];
+    const changedPlotPointIds: string[] = [];
+    const changedIssueIds: string[] = [];
+    const changedActSummaryIds: string[] = [];
+    let guideLineChanged: boolean = false;
+    let aiGuideLineChanged: boolean = false;
+
+    newerBook.chapters.forEach((newerChapter: SyncedChapter): void => {
+        const olderChapter: SyncedChapter | undefined = olderBook.chapters.find((chapter: SyncedChapter): boolean => chapter.id === newerChapter.id);
+
+        if (!olderChapter) {
+            changedChapterIds.push(newerChapter.id);
+            newerChapter.contents.forEach((content: SyncedChapterContent): void => {
+                changedChapterContentIds.push(content.id);
+            });
+            if (newerChapter.info) {
+                changedChapterInfoIds.push(newerChapter.info.id);
+            }
+        } else if (newerChapter.lastUpdate > olderChapter.lastUpdate) {
+            changedChapterIds.push(newerChapter.id);
+        } else {
+            newerChapter.contents.forEach((newerContent: SyncedChapterContent): void => {
+                const olderContent: SyncedChapterContent | undefined = olderChapter.contents.find((content: SyncedChapterContent): boolean => content.id === newerContent.id);
+                if (!olderContent || newerContent.lastUpdate > olderContent.lastUpdate) {
+                    changedChapterContentIds.push(newerContent.id);
+                }
+            });
+
+            if (newerChapter.info && olderChapter.info) {
+                if (newerChapter.info.lastUpdate > olderChapter.info.lastUpdate) {
+                    changedChapterInfoIds.push(newerChapter.info.id);
+                }
+            } else if (newerChapter.info && !olderChapter.info) {
+                changedChapterInfoIds.push(newerChapter.info.id);
+            }
+        }
+    });
+
+    newerBook.characters.forEach((newerCharacter: SyncedCharacter): void => {
+        const olderCharacter: SyncedCharacter | undefined = olderBook.characters.find((character: SyncedCharacter): boolean => character.id === newerCharacter.id);
+
+        if (!olderCharacter) {
+            changedCharacterIds.push(newerCharacter.id);
+            newerCharacter.attributes.forEach((attribute: SyncedCharacterAttribute): void => {
+                changedCharacterAttributeIds.push(attribute.id);
+            });
+        } else if (newerCharacter.lastUpdate > olderCharacter.lastUpdate) {
+            changedCharacterIds.push(newerCharacter.id);
+        } else {
+            newerCharacter.attributes.forEach((newerAttribute: SyncedCharacterAttribute): void => {
+                const olderAttribute: SyncedCharacterAttribute | undefined = olderCharacter.attributes.find((attribute: SyncedCharacterAttribute): boolean => attribute.id === newerAttribute.id);
+                if (!olderAttribute || newerAttribute.lastUpdate > olderAttribute.lastUpdate) {
+                    changedCharacterAttributeIds.push(newerAttribute.id);
+                }
+            });
+        }
+    });
+
+    newerBook.locations.forEach((newerLocation: SyncedLocation): void => {
+        const olderLocation: SyncedLocation | undefined = olderBook.locations.find((location: SyncedLocation): boolean => location.id === newerLocation.id);
+
+        if (!olderLocation) {
+            changedLocationIds.push(newerLocation.id);
+            newerLocation.elements.forEach((element: SyncedLocationElement): void => {
+                changedLocationElementIds.push(element.id);
+                element.subElements.forEach((subElement: SyncedLocationSubElement): void => {
+                    changedLocationSubElementIds.push(subElement.id);
+                });
+            });
+        } else if (newerLocation.lastUpdate > olderLocation.lastUpdate) {
+            changedLocationIds.push(newerLocation.id);
+        } else {
+            newerLocation.elements.forEach((newerElement: SyncedLocationElement): void => {
+                const olderElement: SyncedLocationElement | undefined = olderLocation.elements.find((element: SyncedLocationElement): boolean => element.id === newerElement.id);
+
+                if (!olderElement) {
+                    changedLocationElementIds.push(newerElement.id);
+                    newerElement.subElements.forEach((subElement: SyncedLocationSubElement): void => {
+                        changedLocationSubElementIds.push(subElement.id);
+                    });
+                } else if (newerElement.lastUpdate > olderElement.lastUpdate) {
+                    changedLocationElementIds.push(newerElement.id);
+                } else {
+                    newerElement.subElements.forEach((newerSubElement: SyncedLocationSubElement): void => {
+                        const olderSubElement: SyncedLocationSubElement | undefined = olderElement.subElements.find((subElement: SyncedLocationSubElement): boolean => subElement.id === newerSubElement.id);
+                        if (!olderSubElement || newerSubElement.lastUpdate > olderSubElement.lastUpdate) {
+                            changedLocationSubElementIds.push(newerSubElement.id);
+                        }
+                    });
+                }
+            });
+        }
+    });
+
+    newerBook.worlds.forEach((newerWorld: SyncedWorld): void => {
+        const olderWorld: SyncedWorld | undefined = olderBook.worlds.find((world: SyncedWorld): boolean => world.id === newerWorld.id);
+
+        if (!olderWorld) {
+            changedWorldIds.push(newerWorld.id);
+            newerWorld.elements.forEach((element: SyncedWorldElement): void => {
+                changedWorldElementIds.push(element.id);
+            });
+        } else if (newerWorld.lastUpdate > olderWorld.lastUpdate) {
+            changedWorldIds.push(newerWorld.id);
+        } else {
+            newerWorld.elements.forEach((newerElement: SyncedWorldElement): void => {
+                const olderElement: SyncedWorldElement | undefined = olderWorld.elements.find((element: SyncedWorldElement): boolean => element.id === newerElement.id);
+                if (!olderElement || newerElement.lastUpdate > olderElement.lastUpdate) {
+                    changedWorldElementIds.push(newerElement.id);
+                }
+            });
+        }
+    });
+
+    newerBook.incidents.forEach((newerIncident: SyncedIncident): void => {
+        const olderIncident: SyncedIncident | undefined = olderBook.incidents.find((incident: SyncedIncident): boolean => incident.id === newerIncident.id);
+        if (!olderIncident || newerIncident.lastUpdate > olderIncident.lastUpdate) {
+            changedIncidentIds.push(newerIncident.id);
+        }
+    });
+
+    newerBook.plotPoints.forEach((newerPlotPoint: SyncedPlotPoint): void => {
+        const olderPlotPoint: SyncedPlotPoint | undefined = olderBook.plotPoints.find((plotPoint: SyncedPlotPoint): boolean => plotPoint.id === newerPlotPoint.id);
+        if (!olderPlotPoint || newerPlotPoint.lastUpdate > olderPlotPoint.lastUpdate) {
+            changedPlotPointIds.push(newerPlotPoint.id);
+        }
+    });
+
+    newerBook.issues.forEach((newerIssue: SyncedIssue): void => {
+        const olderIssue: SyncedIssue | undefined = olderBook.issues.find((issue: SyncedIssue): boolean => issue.id === newerIssue.id);
+        if (!olderIssue || newerIssue.lastUpdate > olderIssue.lastUpdate) {
+            changedIssueIds.push(newerIssue.id);
+        }
+    });
+
+    newerBook.actSummaries.forEach((newerActSummary: SyncedActSummary): void => {
+        const olderActSummary: SyncedActSummary | undefined = olderBook.actSummaries.find((actSummary: SyncedActSummary): boolean => actSummary.id === newerActSummary.id);
+        if (!olderActSummary || newerActSummary.lastUpdate > olderActSummary.lastUpdate) {
+            changedActSummaryIds.push(newerActSummary.id);
+        }
+    });
+
+    if (newerBook.guideLine && olderBook.guideLine) {
+        guideLineChanged = newerBook.guideLine.lastUpdate > olderBook.guideLine.lastUpdate;
+    } else if (newerBook.guideLine && !olderBook.guideLine) {
+        guideLineChanged = true;
+    }
+
+    if (newerBook.aiGuideLine && olderBook.aiGuideLine) {
+        aiGuideLineChanged = newerBook.aiGuideLine.lastUpdate > olderBook.aiGuideLine.lastUpdate;
+    } else if (newerBook.aiGuideLine && !olderBook.aiGuideLine) {
+        aiGuideLineChanged = true;
+    }
+
+    const hasChanges: boolean =
+        changedChapterIds.length > 0 ||
+        changedChapterContentIds.length > 0 ||
+        changedChapterInfoIds.length > 0 ||
+        changedCharacterIds.length > 0 ||
+        changedCharacterAttributeIds.length > 0 ||
+        changedLocationIds.length > 0 ||
+        changedLocationElementIds.length > 0 ||
+        changedLocationSubElementIds.length > 0 ||
+        changedWorldIds.length > 0 ||
+        changedWorldElementIds.length > 0 ||
+        changedIncidentIds.length > 0 ||
+        changedPlotPointIds.length > 0 ||
+        changedIssueIds.length > 0 ||
+        changedActSummaryIds.length > 0 ||
+        guideLineChanged ||
+        aiGuideLineChanged;
+
+    if (!hasChanges) {
+        return null;
+    }
+
+    return {
+        id: newerBook.id,
+        chapters: changedChapterIds,
+        chapterContents: changedChapterContentIds,
+        chapterInfos: changedChapterInfoIds,
+        characters: changedCharacterIds,
+        characterAttributes: changedCharacterAttributeIds,
+        locations: changedLocationIds,
+        locationElements: changedLocationElementIds,
+        locationSubElements: changedLocationSubElementIds,
+        worlds: changedWorldIds,
+        worldElements: changedWorldElementIds,
+        incidents: changedIncidentIds,
+        plotPoints: changedPlotPointIds,
+        issues: changedIssueIds,
+        actSummaries: changedActSummaryIds,
+        guideLine: guideLineChanged,
+        aiGuideLine: aiGuideLineChanged
+    };
+}

lib/utils/syncComparison.ts

@@ -0,0 +1,365 @@
+import {
+    SyncedBook,
+    SyncedChapter,
+    SyncedChapterContent,
+    SyncedChapterInfo,
+    SyncedCharacter,
+    SyncedCharacterAttribute,
+    SyncedLocation,
+    SyncedLocationElement,
+    SyncedLocationSubElement,
+    SyncedWorld,
+    SyncedWorldElement,
+    SyncedIncident,
+    SyncedPlotPoint,
+    SyncedIssue,
+    SyncedActSummary,
+    SyncedGuideLine,
+    SyncedAIGuideLine
+} from "@/lib/models/SyncedBook";
+
+/**
+ * Résultat de comparaison pour un livre
+ */
+export interface BookSyncDiff {
+    id: string;
+    type: string;
+    title: string;
+    subTitle: string | null;
+    bookNeedsUpdate: boolean; // Le livre lui-même a changé
+    lastUpdate: number;
+    chapters: SyncedChapter[];
+    characters: SyncedCharacter[];
+    locations: SyncedLocation[];
+    worlds: SyncedWorld[];
+    incidents: SyncedIncident[];
+    plotPoints: SyncedPlotPoint[];
+    issues: SyncedIssue[];
+    actSummaries: SyncedActSummary[];
+    guideLine: SyncedGuideLine | null;
+    aiGuideLine: SyncedAIGuideLine | null;
+    hasAnyChanges: boolean; // Indique si des changements existent
+}
+
+/**
+ * Compare en profondeur deux livres synchronisés et retourne les différences
+ */
+export function compareBooks(serverBook: SyncedBook, localBook: SyncedBook): BookSyncDiff {
+    const bookNeedsUpdate = serverBook.lastUpdate > localBook.lastUpdate;
+
+    // Comparer les chapitres
+    const chaptersWithChanges: SyncedChapter[] = [];
+    for (const serverChapter of serverBook.chapters) {
+        const localChapter = localBook.chapters.find(c => c.id === serverChapter.id);
+
+        if (!localChapter) {
+            // Chapitre n'existe pas localement
+            chaptersWithChanges.push(serverChapter);
+        } else if (serverChapter.lastUpdate > localChapter.lastUpdate) {
+            // Chapitre a changé
+            chaptersWithChanges.push(serverChapter);
+        } else {
+            // Vérifier les contenus du chapitre
+            const contentsWithChanges: SyncedChapterContent[] = [];
+            for (const serverContent of serverChapter.contents) {
+                const localContent = localChapter.contents.find(c => c.id === serverContent.id);
+                if (!localContent || serverContent.lastUpdate > localContent.lastUpdate) {
+                    contentsWithChanges.push(serverContent);
+                }
+            }
+
+            // Vérifier l'info du chapitre
+            let infoNeedsUpdate = false;
+            if (serverChapter.info && localChapter.info) {
+                infoNeedsUpdate = serverChapter.info.lastUpdate > localChapter.info.lastUpdate;
+            } else if (serverChapter.info && !localChapter.info) {
+                infoNeedsUpdate = true;
+            }
+
+            // Si des contenus ou info ont changé, inclure le chapitre
+            if (contentsWithChanges.length > 0 || infoNeedsUpdate) {
+                chaptersWithChanges.push({
+                    ...serverChapter,
+                    contents: contentsWithChanges.length > 0 ? contentsWithChanges : serverChapter.contents,
+                    info: infoNeedsUpdate ? serverChapter.info : null
+                });
+            }
+        }
+    }
+
+    // Comparer les personnages
+    const charactersWithChanges: SyncedCharacter[] = [];
+    for (const serverChar of serverBook.characters) {
+        const localChar = localBook.characters.find(c => c.id === serverChar.id);
+
+        if (!localChar) {
+            charactersWithChanges.push(serverChar);
+        } else if (serverChar.lastUpdate > localChar.lastUpdate) {
+            charactersWithChanges.push(serverChar);
+        } else {
+            // Vérifier les attributs
+            const attributesWithChanges: SyncedCharacterAttribute[] = [];
+            for (const serverAttr of serverChar.attributes) {
+                const localAttr = localChar.attributes.find(a => a.id === serverAttr.id);
+                if (!localAttr || serverAttr.lastUpdate > localAttr.lastUpdate) {
+                    attributesWithChanges.push(serverAttr);
+                }
+            }
+
+            if (attributesWithChanges.length > 0) {
+                charactersWithChanges.push({
+                    ...serverChar,
+                    attributes: attributesWithChanges
+                });
+            }
+        }
+    }
+
+    // Comparer les locations
+    const locationsWithChanges: SyncedLocation[] = [];
+    for (const serverLoc of serverBook.locations) {
+        const localLoc = localBook.locations.find(l => l.id === serverLoc.id);
+
+        if (!localLoc) {
+            locationsWithChanges.push(serverLoc);
+        } else if (serverLoc.lastUpdate > localLoc.lastUpdate) {
+            locationsWithChanges.push(serverLoc);
+        } else {
+            // Vérifier les éléments
+            const elementsWithChanges: SyncedLocationElement[] = [];
+            for (const serverElem of serverLoc.elements) {
+                const localElem = localLoc.elements.find(e => e.id === serverElem.id);
+
+                if (!localElem) {
+                    elementsWithChanges.push(serverElem);
+                } else if (serverElem.lastUpdate > localElem.lastUpdate) {
+                    elementsWithChanges.push(serverElem);
+                } else {
+                    // Vérifier les sous-éléments
+                    const subElementsWithChanges: SyncedLocationSubElement[] = [];
+                    for (const serverSubElem of serverElem.subElements) {
+                        const localSubElem = localElem.subElements.find(s => s.id === serverSubElem.id);
+                        if (!localSubElem || serverSubElem.lastUpdate > localSubElem.lastUpdate) {
+                            subElementsWithChanges.push(serverSubElem);
+                        }
+                    }
+
+                    if (subElementsWithChanges.length > 0) {
+                        elementsWithChanges.push({
+                            ...serverElem,
+                            subElements: subElementsWithChanges
+                        });
+                    }
+                }
+            }
+
+            if (elementsWithChanges.length > 0) {
+                locationsWithChanges.push({
+                    ...serverLoc,
+                    elements: elementsWithChanges
+                });
+            }
+        }
+    }
+
+    // Comparer les mondes
+    const worldsWithChanges: SyncedWorld[] = [];
+    for (const serverWorld of serverBook.worlds) {
+        const localWorld = localBook.worlds.find(w => w.id === serverWorld.id);
+
+        if (!localWorld) {
+            worldsWithChanges.push(serverWorld);
+        } else if (serverWorld.lastUpdate > localWorld.lastUpdate) {
+            worldsWithChanges.push(serverWorld);
+        } else {
+            // Vérifier les éléments du monde
+            const elementsWithChanges: SyncedWorldElement[] = [];
+            for (const serverElem of serverWorld.elements) {
+                const localElem = localWorld.elements.find(e => e.id === serverElem.id);
+                if (!localElem || serverElem.lastUpdate > localElem.lastUpdate) {
+                    elementsWithChanges.push(serverElem);
+                }
+            }
+
+            if (elementsWithChanges.length > 0) {
+                worldsWithChanges.push({
+                    ...serverWorld,
+                    elements: elementsWithChanges
+                });
+            }
+        }
+    }
+
+    // Comparer les incidents
+    const incidentsWithChanges: SyncedIncident[] = [];
+    for (const serverIncident of serverBook.incidents) {
+        const localIncident = localBook.incidents.find(i => i.id === serverIncident.id);
+        if (!localIncident || serverIncident.lastUpdate > localIncident.lastUpdate) {
+            incidentsWithChanges.push(serverIncident);
+        }
+    }
+
+    // Comparer les plot points
+    const plotPointsWithChanges: SyncedPlotPoint[] = [];
+    for (const serverPlot of serverBook.plotPoints) {
+        const localPlot = localBook.plotPoints.find(p => p.id === serverPlot.id);
+        if (!localPlot || serverPlot.lastUpdate > localPlot.lastUpdate) {
+            plotPointsWithChanges.push(serverPlot);
+        }
+    }
+
+    // Comparer les issues
+    const issuesWithChanges: SyncedIssue[] = [];
+    for (const serverIssue of serverBook.issues) {
+        const localIssue = localBook.issues.find(i => i.id === serverIssue.id);
+        if (!localIssue || serverIssue.lastUpdate > localIssue.lastUpdate) {
+            issuesWithChanges.push(serverIssue);
+        }
+    }
+
+    // Comparer les act summaries
+    const actSummariesWithChanges: SyncedActSummary[] = [];
+    for (const serverAct of serverBook.actSummaries) {
+        const localAct = localBook.actSummaries.find(a => a.id === serverAct.id);
+        if (!localAct || serverAct.lastUpdate > localAct.lastUpdate) {
+            actSummariesWithChanges.push(serverAct);
+        }
+    }
+
+    // Comparer guideline
+    let guideLineNeedsUpdate: SyncedGuideLine | null = null;
+    if (serverBook.guideLine && localBook.guideLine) {
+        if (serverBook.guideLine.lastUpdate > localBook.guideLine.lastUpdate) {
+            guideLineNeedsUpdate = serverBook.guideLine;
+        }
+    } else if (serverBook.guideLine && !localBook.guideLine) {
+        guideLineNeedsUpdate = serverBook.guideLine;
+    }
+
+    // Comparer AI guideline
+    let aiGuideLineNeedsUpdate: SyncedAIGuideLine | null = null;
+    if (serverBook.aiGuideLine && localBook.aiGuideLine) {
+        if (serverBook.aiGuideLine.lastUpdate > localBook.aiGuideLine.lastUpdate) {
+            aiGuideLineNeedsUpdate = serverBook.aiGuideLine;
+        }
+    } else if (serverBook.aiGuideLine && !localBook.aiGuideLine) {
+        aiGuideLineNeedsUpdate = serverBook.aiGuideLine;
+    }
+
+    // Déterminer s'il y a des changements
+    const hasAnyChanges = bookNeedsUpdate ||
+        chaptersWithChanges.length > 0 ||
+        charactersWithChanges.length > 0 ||
+        locationsWithChanges.length > 0 ||
+        worldsWithChanges.length > 0 ||
+        incidentsWithChanges.length > 0 ||
+        plotPointsWithChanges.length > 0 ||
+        issuesWithChanges.length > 0 ||
+        actSummariesWithChanges.length > 0 ||
+        guideLineNeedsUpdate !== null ||
+        aiGuideLineNeedsUpdate !== null;
+
+    return {
+        id: serverBook.id,
+        type: serverBook.type,
+        title: serverBook.title,
+        subTitle: serverBook.subTitle,
+        bookNeedsUpdate,
+        lastUpdate: serverBook.lastUpdate,
+        chapters: chaptersWithChanges,
+        characters: charactersWithChanges,
+        locations: locationsWithChanges,
+        worlds: worldsWithChanges,
+        incidents: incidentsWithChanges,
+        plotPoints: plotPointsWithChanges,
+        issues: issuesWithChanges,
+        actSummaries: actSummariesWithChanges,
+        guideLine: guideLineNeedsUpdate,
+        aiGuideLine: aiGuideLineNeedsUpdate,
+        hasAnyChanges
+    };
+}
+
+/**
+ * Compare tous les livres serveur vs locaux et retourne ceux qui ont des changements
+ */
+export function getBooksToSyncFromServer(serverBooks: SyncedBook[], localBooks: SyncedBook[]): BookSyncDiff[] {
+    const booksWithChanges: BookSyncDiff[] = [];
+
+    for (const serverBook of serverBooks) {
+        const localBook = localBooks.find(b => b.id === serverBook.id);
+
+        if (!localBook) {
+            // Livre n'existe pas localement - tout le livre doit être synchronisé
+            booksWithChanges.push({
+                id: serverBook.id,
+                type: serverBook.type,
+                title: serverBook.title,
+                subTitle: serverBook.subTitle,
+                bookNeedsUpdate: true,
+                lastUpdate: serverBook.lastUpdate,
+                chapters: serverBook.chapters,
+                characters: serverBook.characters,
+                locations: serverBook.locations,
+                worlds: serverBook.worlds,
+                incidents: serverBook.incidents,
+                plotPoints: serverBook.plotPoints,
+                issues: serverBook.issues,
+                actSummaries: serverBook.actSummaries,
+                guideLine: serverBook.guideLine,
+                aiGuideLine: serverBook.aiGuideLine,
+                hasAnyChanges: true
+            });
+        } else {
+            // Comparer en profondeur
+            const diff = compareBooks(serverBook, localBook);
+            if (diff.hasAnyChanges) {
+                booksWithChanges.push(diff);
+            }
+        }
+    }
+
+    return booksWithChanges;
+}
+
+/**
+ * Compare tous les livres locaux vs serveur et retourne ceux qui ont des changements locaux
+ */
+export function getBooksToSyncToServer(localBooks: SyncedBook[], serverBooks: SyncedBook[]): BookSyncDiff[] {
+    const booksWithChanges: BookSyncDiff[] = [];
+
+    for (const localBook of localBooks) {
+        const serverBook = serverBooks.find(b => b.id === localBook.id);
+
+        if (!serverBook) {
+            // Livre n'existe pas sur le serveur - tout le livre doit être envoyé
+            booksWithChanges.push({
+                id: localBook.id,
+                type: localBook.type,
+                title: localBook.title,
+                subTitle: localBook.subTitle,
+                bookNeedsUpdate: true,
+                lastUpdate: localBook.lastUpdate,
+                chapters: localBook.chapters,
+                characters: localBook.characters,
+                locations: localBook.locations,
+                worlds: localBook.worlds,
+                incidents: localBook.incidents,
+                plotPoints: localBook.plotPoints,
+                issues: localBook.issues,
+                actSummaries: localBook.actSummaries,
+                guideLine: localBook.guideLine,
+                aiGuideLine: localBook.aiGuideLine,
+                hasAnyChanges: true
+            });
+        } else {
+            // Comparer en profondeur (local vs server)
+            const diff = compareBooks(localBook, serverBook);
+            if (diff.hasAnyChanges) {
+                booksWithChanges.push(diff);
+            }
+        }
+    }
+
+    return booksWithChanges;
+}