refactor: create separate BLoCs for each screen with comprehensive tests

- Created 8 separate BLoCs (Home, Library, BookDetails, AddBook, Scanner, Categories, Wishlist, Settings)
- Each BLoC has its own event, state, and bloc files
- Added 70 comprehensive tests covering all BLoC functionality
- All tests passing (70/70)
- Fixed linting issues and updated deprecated APIs
- Improved code organization and maintainability

bookshelf_flutter/lib/bloc/add_book/add_book_bloc.dart

@@ -0,0 +1,110 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import '../../models/models.dart';
+import 'add_book_event.dart';
+import 'add_book_state.dart';
+
+class AddBookBloc extends Bloc<AddBookEvent, AddBookState> {
+  AddBookBloc() : super(AddBookState.initial()) {
+    on<InitializeForm>(_onInitializeForm);
+    on<UpdateFormField>(_onUpdateFormField);
+    on<ToggleFavorite>(_onToggleFavorite);
+    on<ClearForm>(_onClearForm);
+    on<SubmitBook>(_onSubmitBook);
+  }
+
+  void _onInitializeForm(InitializeForm event, Emitter<AddBookState> emit) {
+    emit(state.copyWith(
+      prefilledData: event.prefilledData,
+      isLoading: false,
+    ));
+
+    if (event.prefilledData != null) {
+      final data = event.prefilledData!;
+      emit(state.copyWith(
+        title: data['title'] as String? ?? '',
+        author: data['author'] as String? ?? '',
+        genre: data['genre'] as String? ?? '',
+        annotation: data['annotation'] as String? ?? '',
+        coverUrl: data['coverUrl'] as String? ?? '',
+        pages: data['pages'] as int?,
+        language: data['language'] as String? ?? '',
+        publishedYear: data['publishedYear'] as int?,
+        rating: data['rating'] as double? ?? 0.0,
+        status: data['status'] as BookStatus? ?? BookStatus.wantToRead,
+        progress: data['progress'] as int? ?? 0,
+        isFavorite: data['isFavorite'] as bool? ?? false,
+      ));
+    }
+  }
+
+  void _onUpdateFormField(UpdateFormField event, Emitter<AddBookState> emit) {
+    switch (event.field) {
+      case 'title':
+        emit(state.copyWith(title: event.value as String));
+        break;
+      case 'author':
+        emit(state.copyWith(author: event.value as String));
+        break;
+      case 'genre':
+        emit(state.copyWith(genre: event.value as String));
+        break;
+      case 'annotation':
+        emit(state.copyWith(annotation: event.value as String));
+        break;
+      case 'coverUrl':
+        emit(state.copyWith(coverUrl: event.value as String));
+        break;
+      case 'pages':
+        emit(state.copyWith(pages: event.value as int?));
+        break;
+      case 'language':
+        emit(state.copyWith(language: event.value as String));
+        break;
+      case 'publishedYear':
+        emit(state.copyWith(publishedYear: event.value as int?));
+        break;
+      case 'rating':
+        emit(state.copyWith(rating: event.value as double?));
+        break;
+      case 'status':
+        emit(state.copyWith(status: event.value as BookStatus));
+        break;
+      case 'progress':
+        emit(state.copyWith(progress: event.value as int?));
+        break;
+    }
+  }
+
+  void _onToggleFavorite(ToggleFavorite event, Emitter<AddBookState> emit) {
+    emit(state.copyWith(isFavorite: !state.isFavorite));
+  }
+
+  void _onClearForm(ClearForm event, Emitter<AddBookState> emit) {
+    emit(AddBookState.initial());
+  }
+
+  void _onSubmitBook(SubmitBook event, Emitter<AddBookState> emit) {
+    final book = createBook(
+      id: DateTime.now().millisecondsSinceEpoch.toString(),
+      title: state.title.isNotEmpty ? state.title : 'Unknown',
+      author: state.author.isNotEmpty ? state.author : 'Unknown',
+      genre: state.genre.isNotEmpty ? state.genre : 'Unknown',
+      annotation: state.annotation,
+      coverUrl: state.coverUrl.isNotEmpty
+          ? state.coverUrl
+          : 'https://picsum.photos/seed/${DateTime.now().millisecondsSinceEpoch}/400/600',
+      pages: state.pages,
+      language: state.language,
+      publishedYear: state.publishedYear,
+      rating: state.rating,
+      status: state.status,
+      progress: state.progress,
+      isFavorite: state.isFavorite,
+    );
+
+    emit(state.copyWith(
+      submittedBook: book,
+      isSubmitted: true,
+    ));
+  }
+}

bookshelf_flutter/lib/bloc/add_book/add_book_event.dart

@@ -0,0 +1,27 @@
+
+abstract class AddBookEvent {
+  const AddBookEvent();
+}
+
+class InitializeForm extends AddBookEvent {
+  final Map<String, dynamic>? prefilledData;
+  const InitializeForm(this.prefilledData);
+}
+
+class UpdateFormField extends AddBookEvent {
+  final String field;
+  final dynamic value;
+  const UpdateFormField(this.field, this.value);
+}
+
+class ToggleFavorite extends AddBookEvent {
+  const ToggleFavorite();
+}
+
+class ClearForm extends AddBookEvent {
+  const ClearForm();
+}
+
+class SubmitBook extends AddBookEvent {
+  const SubmitBook();
+}

bookshelf_flutter/lib/bloc/add_book/add_book_state.dart

@@ -0,0 +1,109 @@
+import 'package:equatable/equatable.dart';
+import '../../models/models.dart';
+
+class AddBookState extends Equatable {
+  final String title;
+  final String author;
+  final String genre;
+  final String annotation;
+  final String coverUrl;
+  final int? pages;
+  final String language;
+  final int? publishedYear;
+  final double? rating;
+  final BookStatus status;
+  final int? progress;
+  final bool isFavorite;
+  final Map<String, dynamic>? prefilledData;
+  final Book? submittedBook;
+  final bool isSubmitted;
+  final bool isLoading;
+  final String? errorMessage;
+
+  const AddBookState({
+    this.title = '',
+    this.author = '',
+    this.genre = '',
+    this.annotation = '',
+    this.coverUrl = '',
+    this.pages,
+    this.language = '',
+    this.publishedYear,
+    this.rating,
+    this.status = BookStatus.wantToRead,
+    this.progress,
+    this.isFavorite = false,
+    this.prefilledData,
+    this.submittedBook,
+    this.isSubmitted = false,
+    this.isLoading = false,
+    this.errorMessage,
+  });
+
+  factory AddBookState.initial() {
+    return const AddBookState(
+      isLoading: false,
+    );
+  }
+
+  AddBookState copyWith({
+    String? title,
+    String? author,
+    String? genre,
+    String? annotation,
+    String? coverUrl,
+    int? pages,
+    String? language,
+    int? publishedYear,
+    double? rating,
+    BookStatus? status,
+    int? progress,
+    bool? isFavorite,
+    Map<String, dynamic>? prefilledData,
+    Book? submittedBook,
+    bool? isSubmitted,
+    bool? isLoading,
+    String? errorMessage,
+  }) {
+    return AddBookState(
+      title: title ?? this.title,
+      author: author ?? this.author,
+      genre: genre ?? this.genre,
+      annotation: annotation ?? this.annotation,
+      coverUrl: coverUrl ?? this.coverUrl,
+      pages: pages ?? this.pages,
+      language: language ?? this.language,
+      publishedYear: publishedYear ?? this.publishedYear,
+      rating: rating ?? this.rating,
+      status: status ?? this.status,
+      progress: progress ?? this.progress,
+      isFavorite: isFavorite ?? this.isFavorite,
+      prefilledData: prefilledData ?? this.prefilledData,
+      submittedBook: submittedBook ?? this.submittedBook,
+      isSubmitted: isSubmitted ?? this.isSubmitted,
+      isLoading: isLoading ?? this.isLoading,
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        title,
+        author,
+        genre,
+        annotation,
+        coverUrl,
+        pages,
+        language,
+        publishedYear,
+        rating,
+        status,
+        progress,
+        isFavorite,
+        prefilledData,
+        submittedBook,
+        isSubmitted,
+        isLoading,
+        errorMessage,
+      ];
+}

bookshelf_flutter/lib/bloc/app_bloc.dart

@@ -0,0 +1,179 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import '../models/models.dart';
+import 'app_event.dart';
+import 'app_state.dart';
+
+class AppBloc extends Bloc<AppEvent, AppState> {
+  AppBloc() : super(AppState(books: _initialBooks)) {
+    on<ScreenChanged>(_onScreenChanged);
+    on<BookClicked>(_onBookClicked);
+    on<AddBookClicked>(_onAddBookClicked);
+    on<BookSaved>(_onBookSaved);
+    on<BookDeleted>(_onBookDeleted);
+    on<BookDetected>(_onBookDetected);
+    on<SearchChanged>(_onSearchChanged);
+  }
+
+  static List<Book> get _initialBooks => [
+        createBook(
+          id: '1',
+          title: 'Великий Гэтсби',
+          author: 'Ф. Скотт Фицджеральд',
+          genre: 'Classic',
+          annotation:
+              'История о несбывшейся любви и трагедии американской мечты на фоне бурных двадцатых годов.',
+          coverUrl: 'https://picsum.photos/seed/gatsby/400/600',
+          pages: 208,
+          language: 'English',
+          publishedYear: 1925,
+          rating: 4.8,
+          status: BookStatus.reading,
+          progress: 45,
+          isFavorite: true,
+        ),
+        createBook(
+          id: '2',
+          title: '1984',
+          author: 'Джордж Оруэлл',
+          genre: 'Dystopian',
+          annotation:
+              'Антиутопия о тоталитарном государстве, где мысли контролируются, а правда переменчива.',
+          coverUrl: 'https://picsum.photos/seed/1984/400/600',
+          pages: 328,
+          language: 'English',
+          publishedYear: 1949,
+          rating: 4.9,
+          status: BookStatus.wantToRead,
+          isFavorite: true,
+        ),
+        createBook(
+          id: '3',
+          title: 'Дюна',
+          author: 'Фрэнк Герберт',
+          genre: 'Sci-Fi',
+          annotation:
+              'Эпическая сага о борьбе за власть над самой важной планетой во Вселенной.',
+          coverUrl: 'https://picsum.photos/seed/dune/400/600',
+          pages: 896,
+          language: 'English',
+          publishedYear: 1965,
+          rating: 4.7,
+          status: BookStatus.reading,
+          progress: 12,
+          isFavorite: false,
+        ),
+        createBook(
+          id: '4',
+          title: 'Хоббит',
+          author: 'Дж. Р. Р. Толкин',
+          genre: 'Fantasy',
+          annotation:
+              'Путешествие Бильбо Бэггинса туда и обратно в поисках сокровищ гномов.',
+          coverUrl: 'https://picsum.photos/seed/hobbit/400/600',
+          pages: 310,
+          language: 'English',
+          publishedYear: 1937,
+          rating: 4.9,
+          status: BookStatus.done,
+          isFavorite: false,
+        ),
+      ];
+
+  void _onScreenChanged(ScreenChanged event, Emitter<AppState> emit) {
+    emit(state.copyWith(currentScreen: event.screen));
+  }
+
+  void _onBookClicked(BookClicked event, Emitter<AppState> emit) {
+    emit(state.copyWith(
+      selectedBook: event.book,
+      currentScreen: AppScreen.details,
+    ));
+  }
+
+  void _onAddBookClicked(AddBookClicked event, Emitter<AppState> emit) {
+    emit(state.copyWith(
+      prefilledData: null,
+      selectedBook: null,
+      currentScreen: AppScreen.addBook,
+    ));
+  }
+
+  void _onBookSaved(BookSaved event, Emitter<AppState> emit) {
+    final bookData = event.bookData;
+    
+    if (state.selectedBook != null) {
+      // Edit existing book
+      final updatedBooks = state.books.map((book) {
+        if (book.id == state.selectedBook!.id) {
+          return book.copyWith(
+            title: bookData['title'] as String? ?? book.title,
+            author: bookData['author'] as String? ?? book.author,
+            genre: bookData['genre'] as String? ?? book.genre,
+            annotation: bookData['annotation'] as String? ?? book.annotation,
+            coverUrl: bookData['coverUrl'] as String?,
+            pages: bookData['pages'] as int?,
+            language: bookData['language'] as String?,
+            publishedYear: bookData['publishedYear'] as int?,
+            rating: bookData['rating'] as double?,
+            status: bookData['status'] as BookStatus? ?? book.status,
+            progress: bookData['progress'] as int?,
+            isFavorite: bookData['isFavorite'] as bool? ?? book.isFavorite,
+          );
+        }
+        return book;
+      }).toList();
+      
+      emit(state.copyWith(
+        books: updatedBooks,
+        currentScreen: AppScreen.library,
+        selectedBook: null,
+        prefilledData: null,
+      ));
+    } else {
+      // Add new book
+      final newBook = createBook(
+        id: DateTime.now().millisecondsSinceEpoch.toString(),
+        title: bookData['title'] as String? ?? 'Unknown',
+        author: bookData['author'] as String? ?? 'Unknown',
+        genre: bookData['genre'] as String? ?? 'Unknown',
+        annotation: bookData['annotation'] as String? ?? '',
+        coverUrl: bookData['coverUrl'] as String? ??
+            'https://picsum.photos/seed/${DateTime.now().millisecondsSinceEpoch}/400/600',
+        pages: bookData['pages'] as int?,
+        language: bookData['language'] as String?,
+        publishedYear: bookData['publishedYear'] as int?,
+        rating: bookData['rating'] as double?,
+        status: bookData['status'] as BookStatus? ?? BookStatus.wantToRead,
+        progress: bookData['progress'] as int?,
+        isFavorite: bookData['isFavorite'] as bool? ?? false,
+      );
+      
+      emit(state.copyWith(
+        books: [...state.books, newBook],
+        currentScreen: AppScreen.library,
+        selectedBook: null,
+        prefilledData: null,
+      ));
+    }
+  }
+
+  void _onBookDeleted(BookDeleted event, Emitter<AppState> emit) {
+    final updatedBooks = state.books.where((book) => book.id != event.id).toList();
+    emit(state.copyWith(
+      books: updatedBooks,
+      currentScreen: AppScreen.library,
+      selectedBook: null,
+    ));
+  }
+
+  void _onBookDetected(BookDetected event, Emitter<AppState> emit) {
+    emit(state.copyWith(
+      prefilledData: event.bookData,
+      currentScreen: AppScreen.addBook,
+    ));
+  }
+
+  void _onSearchChanged(SearchChanged event, Emitter<AppState> emit) {
+    emit(state.copyWith(searchQuery: event.query));
+  }
+}

bookshelf_flutter/lib/bloc/app_event.dart

@@ -0,0 +1,39 @@
+import '../models/models.dart';
+
+abstract class AppEvent {
+  const AppEvent();
+}
+
+class ScreenChanged extends AppEvent {
+  final AppScreen screen;
+  const ScreenChanged(this.screen);
+}
+
+class BookClicked extends AppEvent {
+  final Book book;
+  const BookClicked(this.book);
+}
+
+class AddBookClicked extends AppEvent {
+  const AddBookClicked();
+}
+
+class BookSaved extends AppEvent {
+  final Map<String, dynamic> bookData;
+  const BookSaved(this.bookData);
+}
+
+class BookDeleted extends AppEvent {
+  final String id;
+  const BookDeleted(this.id);
+}
+
+class BookDetected extends AppEvent {
+  final Map<String, dynamic> bookData;
+  const BookDetected(this.bookData);
+}
+
+class SearchChanged extends AppEvent {
+  final String query;
+  const SearchChanged(this.query);
+}

bookshelf_flutter/lib/bloc/app_state.dart

@@ -0,0 +1,53 @@
+import 'package:equatable/equatable.dart';
+import '../models/models.dart';
+
+class AppState extends Equatable {
+  final AppScreen currentScreen;
+  final List<Book> books;
+  final Book? selectedBook;
+  final Map<String, dynamic>? prefilledData;
+  final String searchQuery;
+  final bool isLoading;
+  final String? errorMessage;
+
+  const AppState({
+    this.currentScreen = AppScreen.library,
+    this.books = const [],
+    this.selectedBook,
+    this.prefilledData,
+    this.searchQuery = '',
+    this.isLoading = false,
+    this.errorMessage,
+  });
+
+  AppState copyWith({
+    AppScreen? currentScreen,
+    List<Book>? books,
+    Book? selectedBook,
+    Map<String, dynamic>? prefilledData,
+    String? searchQuery,
+    bool? isLoading,
+    String? errorMessage,
+  }) {
+    return AppState(
+      currentScreen: currentScreen ?? this.currentScreen,
+      books: books ?? this.books,
+      selectedBook: selectedBook,
+      prefilledData: prefilledData ?? this.prefilledData,
+      searchQuery: searchQuery ?? this.searchQuery,
+      isLoading: isLoading ?? this.isLoading,
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        currentScreen,
+        books,
+        selectedBook,
+        prefilledData,
+        searchQuery,
+        isLoading,
+        errorMessage,
+      ];
+}

bookshelf_flutter/lib/bloc/book_details/book_details_bloc.dart

@@ -0,0 +1,64 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import '../../models/models.dart';
+import 'book_details_event.dart';
+import 'book_details_state.dart';
+
+class BookDetailsBloc extends Bloc<BookDetailsEvent, BookDetailsState> {
+  BookDetailsBloc() : super(BookDetailsState.initial()) {
+    on<LoadBookDetails>(_onLoadBookDetails);
+    on<ToggleFavorite>(_onToggleFavorite);
+    on<UpdateProgress>(_onUpdateProgress);
+    on<UpdateStatus>(_onUpdateStatus);
+    on<DeleteBook>(_onDeleteBook);
+  }
+
+  void _onLoadBookDetails(LoadBookDetails event, Emitter<BookDetailsState> emit) {
+    emit(state.copyWith(
+      book: event.book,
+      isLoading: false,
+    ));
+  }
+
+  void _onToggleFavorite(ToggleFavorite event, Emitter<BookDetailsState> emit) {
+    if (state.book == null) return;
+    
+    final updatedBook = state.book!.copyWith(
+      isFavorite: !state.book!.isFavorite,
+    );
+    
+    emit(state.copyWith(
+      book: updatedBook,
+    ));
+  }
+
+  void _onUpdateProgress(UpdateProgress event, Emitter<BookDetailsState> emit) {
+    if (state.book == null) return;
+    
+    final updatedBook = state.book!.copyWith(
+      progress: event.progress,
+      status: event.progress >= 100 ? BookStatus.done : BookStatus.reading,
+    );
+    
+    emit(state.copyWith(
+      book: updatedBook,
+    ));
+  }
+
+  void _onUpdateStatus(UpdateStatus event, Emitter<BookDetailsState> emit) {
+    if (state.book == null) return;
+    
+    final updatedBook = state.book!.copyWith(
+      status: event.status,
+    );
+    
+    emit(state.copyWith(
+      book: updatedBook,
+    ));
+  }
+
+  void _onDeleteBook(DeleteBook event, Emitter<BookDetailsState> emit) {
+    emit(state.copyWith(
+      isDeleted: true,
+    ));
+  }
+}

bookshelf_flutter/lib/bloc/book_details/book_details_event.dart

@@ -0,0 +1,28 @@
+import '../../models/models.dart';
+
+abstract class BookDetailsEvent {
+  const BookDetailsEvent();
+}
+
+class LoadBookDetails extends BookDetailsEvent {
+  final Book book;
+  const LoadBookDetails(this.book);
+}
+
+class ToggleFavorite extends BookDetailsEvent {
+  const ToggleFavorite();
+}
+
+class UpdateProgress extends BookDetailsEvent {
+  final int progress;
+  const UpdateProgress(this.progress);
+}
+
+class UpdateStatus extends BookDetailsEvent {
+  final BookStatus status;
+  const UpdateStatus(this.status);
+}
+
+class DeleteBook extends BookDetailsEvent {
+  const DeleteBook();
+}

bookshelf_flutter/lib/bloc/book_details/book_details_state.dart

@@ -0,0 +1,44 @@
+import 'package:equatable/equatable.dart';
+import '../../models/models.dart';
+
+class BookDetailsState extends Equatable {
+  final Book? book;
+  final bool isLoading;
+  final bool isDeleted;
+  final String? errorMessage;
+
+  const BookDetailsState({
+    this.book,
+    this.isLoading = false,
+    this.isDeleted = false,
+    this.errorMessage,
+  });
+
+  factory BookDetailsState.initial() {
+    return const BookDetailsState(
+      isLoading: true,
+    );
+  }
+
+  BookDetailsState copyWith({
+    Book? book,
+    bool? isLoading,
+    bool? isDeleted,
+    String? errorMessage,
+  }) {
+    return BookDetailsState(
+      book: book ?? this.book,
+      isLoading: isLoading ?? this.isLoading,
+      isDeleted: isDeleted ?? this.isDeleted,
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        book,
+        isLoading,
+        isDeleted,
+        errorMessage,
+      ];
+}

bookshelf_flutter/lib/bloc/categories/categories_bloc.dart

@@ -0,0 +1,99 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import '../../models/models.dart';
+import 'categories_event.dart';
+import 'categories_state.dart';
+
+class CategoriesBloc extends Bloc<CategoriesEvent, CategoriesState> {
+  CategoriesBloc() : super(CategoriesState.initial()) {
+    on<LoadCategories>(_onLoadCategories);
+    on<SelectCategory>(_onSelectCategory);
+    on<SearchCategories>(_onSearchCategories);
+  }
+
+  void _onLoadCategories(LoadCategories event, Emitter<CategoriesState> emit) {
+    final categories = _getCategories();
+    emit(state.copyWith(
+      categories: categories,
+      filteredCategories: categories,
+      isLoading: false,
+    ));
+  }
+
+  void _onSelectCategory(SelectCategory event, Emitter<CategoriesState> emit) {
+    emit(state.copyWith(selectedCategory: event.category));
+  }
+
+  void _onSearchCategories(SearchCategories event, Emitter<CategoriesState> emit) {
+    final query = event.query.toLowerCase();
+    final filtered = state.categories.where((category) {
+      return category.name.toLowerCase().contains(query);
+    }).toList();
+    
+    emit(state.copyWith(
+      searchQuery: event.query,
+      filteredCategories: filtered,
+    ));
+  }
+
+  List<Category> _getCategories() {
+    return [
+      createCategory(
+        id: '1',
+        name: 'Classic',
+        count: 15,
+        icon: Icons.category,
+        colorClass: 'category-classic',
+      ),
+      createCategory(
+        id: '2',
+        name: 'Sci-Fi',
+        count: 8,
+        icon: Icons.rocket_launch,
+        colorClass: 'category-scifi',
+      ),
+      createCategory(
+        id: '3',
+        name: 'Fantasy',
+        count: 12,
+        icon: Icons.auto_awesome,
+        colorClass: 'category-fantasy',
+      ),
+      createCategory(
+        id: '4',
+        name: 'Mystery',
+        count: 6,
+        icon: Icons.search,
+        colorClass: 'category-mystery',
+      ),
+      createCategory(
+        id: '5',
+        name: 'Romance',
+        count: 10,
+        icon: Icons.favorite,
+        colorClass: 'category-romance',
+      ),
+      createCategory(
+        id: '6',
+        name: 'Non-fiction',
+        count: 9,
+        icon: Icons.book,
+        colorClass: 'category-nonfiction',
+      ),
+      createCategory(
+        id: '7',
+        name: 'Dystopian',
+        count: 4,
+        icon: Icons.nightlife,
+        colorClass: 'category-dystopian',
+      ),
+      createCategory(
+        id: '8',
+        name: 'Adventure',
+        count: 7,
+        icon: Icons.explore,
+        colorClass: 'category-adventure',
+      ),
+    ];
+  }
+}

bookshelf_flutter/lib/bloc/categories/categories_event.dart

@@ -0,0 +1,19 @@
+import '../../models/models.dart';
+
+abstract class CategoriesEvent {
+  const CategoriesEvent();
+}
+
+class LoadCategories extends CategoriesEvent {
+  const LoadCategories();
+}
+
+class SelectCategory extends CategoriesEvent {
+  final Category category;
+  const SelectCategory(this.category);
+}
+
+class SearchCategories extends CategoriesEvent {
+  final String query;
+  const SearchCategories(this.query);
+}

bookshelf_flutter/lib/bloc/categories/categories_state.dart

@@ -0,0 +1,54 @@
+import 'package:equatable/equatable.dart';
+import '../../models/models.dart';
+
+class CategoriesState extends Equatable {
+  final List<Category> categories;
+  final List<Category> filteredCategories;
+  final Category? selectedCategory;
+  final String searchQuery;
+  final bool isLoading;
+  final String? errorMessage;
+
+  const CategoriesState({
+    this.categories = const [],
+    this.filteredCategories = const [],
+    this.selectedCategory,
+    this.searchQuery = '',
+    this.isLoading = false,
+    this.errorMessage,
+  });
+
+  factory CategoriesState.initial() {
+    return const CategoriesState(
+      isLoading: true,
+    );
+  }
+
+  CategoriesState copyWith({
+    List<Category>? categories,
+    List<Category>? filteredCategories,
+    Category? selectedCategory,
+    String? searchQuery,
+    bool? isLoading,
+    String? errorMessage,
+  }) {
+    return CategoriesState(
+      categories: categories ?? this.categories,
+      filteredCategories: filteredCategories ?? this.filteredCategories,
+      selectedCategory: selectedCategory,
+      searchQuery: searchQuery ?? this.searchQuery,
+      isLoading: isLoading ?? this.isLoading,
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        categories,
+        filteredCategories,
+        selectedCategory,
+        searchQuery,
+        isLoading,
+        errorMessage,
+      ];
+}

bookshelf_flutter/lib/bloc/home/home_bloc.dart

@@ -0,0 +1,22 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import '../../models/models.dart';
+import 'home_event.dart';
+import 'home_state.dart';
+
+class HomeBloc extends Bloc<HomeEvent, HomeState> {
+  HomeBloc() : super(HomeState.initial()) {
+    on<LoadHomeData>(_onLoadHomeData);
+    on<NavigateToScreen>(_onNavigateToScreen);
+  }
+
+  void _onLoadHomeData(LoadHomeData event, Emitter<HomeState> emit) {
+    emit(state.copyWith(
+      currentScreen: AppScreen.library,
+      isLoading: false,
+    ));
+  }
+
+  void _onNavigateToScreen(NavigateToScreen event, Emitter<HomeState> emit) {
+    emit(state.copyWith(currentScreen: event.screen));
+  }
+}

bookshelf_flutter/lib/bloc/home/home_event.dart

@@ -0,0 +1,14 @@
+import '../../models/models.dart';
+
+abstract class HomeEvent {
+  const HomeEvent();
+}
+
+class LoadHomeData extends HomeEvent {
+  const LoadHomeData();
+}
+
+class NavigateToScreen extends HomeEvent {
+  final AppScreen screen;
+  const NavigateToScreen(this.screen);
+}

bookshelf_flutter/lib/bloc/home/home_state.dart

@@ -0,0 +1,39 @@
+import 'package:equatable/equatable.dart';
+import '../../models/models.dart';
+
+class HomeState extends Equatable {
+  final AppScreen currentScreen;
+  final bool isLoading;
+  final String? errorMessage;
+
+  const HomeState({
+    this.currentScreen = AppScreen.library,
+    this.isLoading = false,
+    this.errorMessage,
+  });
+
+  factory HomeState.initial() {
+    return const HomeState(
+      isLoading: true,
+    );
+  }
+
+  HomeState copyWith({
+    AppScreen? currentScreen,
+    bool? isLoading,
+    String? errorMessage,
+  }) {
+    return HomeState(
+      currentScreen: currentScreen ?? this.currentScreen,
+      isLoading: isLoading ?? this.isLoading,
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        currentScreen,
+        isLoading,
+        errorMessage,
+      ];
+}

bookshelf_flutter/lib/bloc/library/library_bloc.dart

@@ -0,0 +1,124 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import '../../models/models.dart';
+import 'library_event.dart';
+import 'library_state.dart';
+
+class LibraryBloc extends Bloc<LibraryEvent, LibraryState> {
+  LibraryBloc() : super(LibraryState.initial()) {
+    on<LoadBooks>(_onLoadBooks);
+    on<SearchBooks>(_onSearchBooks);
+    on<BookSelected>(_onBookSelected);
+    on<FilterByStatus>(_onFilterByStatus);
+    on<ClearFilters>(_onClearFilters);
+  }
+
+  static List<Book> get _initialBooks => [
+        createBook(
+          id: '1',
+          title: 'Великий Гэтсби',
+          author: 'Ф. Скотт Фицджеральд',
+          genre: 'Classic',
+          annotation:
+              'История о несбывшейся любви и трагедии американской мечты на фоне бурных двадцатых годов.',
+          coverUrl: 'https://picsum.photos/seed/gatsby/400/600',
+          pages: 208,
+          language: 'English',
+          publishedYear: 1925,
+          rating: 4.8,
+          status: BookStatus.reading,
+          progress: 45,
+          isFavorite: true,
+        ),
+        createBook(
+          id: '2',
+          title: '1984',
+          author: 'Джордж Оруэлл',
+          genre: 'Dystopian',
+          annotation:
+              'Антиутопия о тоталитарном государстве, где мысли контролируются, а правда переменчива.',
+          coverUrl: 'https://picsum.photos/seed/1984/400/600',
+          pages: 328,
+          language: 'English',
+          publishedYear: 1949,
+          rating: 4.9,
+          status: BookStatus.wantToRead,
+          isFavorite: true,
+        ),
+        createBook(
+          id: '3',
+          title: 'Дюна',
+          author: 'Фрэнк Герберт',
+          genre: 'Sci-Fi',
+          annotation:
+              'Эпическая сага о борьбе за власть над самой важной планетой во Вселенной.',
+          coverUrl: 'https://picsum.photos/seed/dune/400/600',
+          pages: 896,
+          language: 'English',
+          publishedYear: 1965,
+          rating: 4.7,
+          status: BookStatus.reading,
+          progress: 12,
+          isFavorite: false,
+        ),
+        createBook(
+          id: '4',
+          title: 'Хоббит',
+          author: 'Дж. Р. Р. Толкин',
+          genre: 'Fantasy',
+          annotation:
+              'Путешествие Бильбо Бэггинса туда и обратно в поисках сокровищ гномов.',
+          coverUrl: 'https://picsum.photos/seed/hobbit/400/600',
+          pages: 310,
+          language: 'English',
+          publishedYear: 1937,
+          rating: 4.9,
+          status: BookStatus.done,
+          isFavorite: false,
+        ),
+      ];
+
+  void _onLoadBooks(LoadBooks event, Emitter<LibraryState> emit) {
+    emit(state.copyWith(
+      books: _initialBooks,
+      filteredBooks: _initialBooks,
+      isLoading: false,
+    ));
+  }
+
+  void _onSearchBooks(SearchBooks event, Emitter<LibraryState> emit) {
+    final query = event.query.toLowerCase();
+    final filtered = state.books.where((book) {
+      return book.title.toLowerCase().contains(query) ||
+          book.author.toLowerCase().contains(query) ||
+          book.genre.toLowerCase().contains(query);
+    }).toList();
+    
+    emit(state.copyWith(
+      searchQuery: event.query,
+      filteredBooks: filtered,
+    ));
+  }
+
+  void _onBookSelected(BookSelected event, Emitter<LibraryState> emit) {
+    emit(state.copyWith(selectedBook: event.book));
+  }
+
+  void _onFilterByStatus(FilterByStatus event, Emitter<LibraryState> emit) {
+    final filtered = state.books.where((book) {
+      return book.status == event.status;
+    }).toList();
+    
+    emit(state.copyWith(
+      statusFilter: event.status,
+      filteredBooks: filtered,
+    ));
+  }
+
+  void _onClearFilters(ClearFilters event, Emitter<LibraryState> emit) {
+    emit(state.copyWith(
+      searchQuery: '',
+      statusFilter: null,
+      filteredBooks: state.books,
+    ));
+  }
+}

bookshelf_flutter/lib/bloc/library/library_event.dart

@@ -0,0 +1,28 @@
+import '../../models/models.dart';
+
+abstract class LibraryEvent {
+  const LibraryEvent();
+}
+
+class LoadBooks extends LibraryEvent {
+  const LoadBooks();
+}
+
+class SearchBooks extends LibraryEvent {
+  final String query;
+  const SearchBooks(this.query);
+}
+
+class BookSelected extends LibraryEvent {
+  final Book book;
+  const BookSelected(this.book);
+}
+
+class FilterByStatus extends LibraryEvent {
+  final BookStatus status;
+  const FilterByStatus(this.status);
+}
+
+class ClearFilters extends LibraryEvent {
+  const ClearFilters();
+}

bookshelf_flutter/lib/bloc/library/library_state.dart

@@ -0,0 +1,59 @@
+import 'package:equatable/equatable.dart';
+import '../../models/models.dart';
+
+class LibraryState extends Equatable {
+  final List<Book> books;
+  final List<Book> filteredBooks;
+  final Book? selectedBook;
+  final String searchQuery;
+  final BookStatus? statusFilter;
+  final bool isLoading;
+  final String? errorMessage;
+
+  const LibraryState({
+    this.books = const [],
+    this.filteredBooks = const [],
+    this.selectedBook,
+    this.searchQuery = '',
+    this.statusFilter,
+    this.isLoading = false,
+    this.errorMessage,
+  });
+
+  factory LibraryState.initial() {
+    return const LibraryState(
+      isLoading: true,
+    );
+  }
+
+  LibraryState copyWith({
+    List<Book>? books,
+    List<Book>? filteredBooks,
+    Book? selectedBook,
+    String? searchQuery,
+    BookStatus? statusFilter,
+    bool? isLoading,
+    String? errorMessage,
+  }) {
+    return LibraryState(
+      books: books ?? this.books,
+      filteredBooks: filteredBooks ?? this.filteredBooks,
+      selectedBook: selectedBook,
+      searchQuery: searchQuery ?? this.searchQuery,
+      statusFilter: statusFilter ?? this.statusFilter,
+      isLoading: isLoading ?? this.isLoading,
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        books,
+        filteredBooks,
+        selectedBook,
+        searchQuery,
+        statusFilter,
+        isLoading,
+        errorMessage,
+      ];
+}

bookshelf_flutter/lib/bloc/scanner/scanner_bloc.dart

@@ -0,0 +1,40 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'scanner_event.dart';
+import 'scanner_state.dart';
+
+class ScannerBloc extends Bloc<ScannerEvent, ScannerState> {
+  ScannerBloc() : super(ScannerState.initial()) {
+    on<StartScanning>(_onStartScanning);
+    on<StopScanning>(_onStopScanning);
+    on<BookDetected>(_onBookDetected);
+    on<ClearDetectedBook>(_onClearDetectedBook);
+  }
+
+  void _onStartScanning(StartScanning event, Emitter<ScannerState> emit) {
+    emit(state.copyWith(
+      isScanning: true,
+      isProcessing: false,
+      errorMessage: null,
+    ));
+  }
+
+  void _onStopScanning(StopScanning event, Emitter<ScannerState> emit) {
+    emit(state.copyWith(isScanning: false));
+  }
+
+  void _onBookDetected(BookDetected event, Emitter<ScannerState> emit) {
+    emit(state.copyWith(
+      detectedBookData: event.bookData,
+      isProcessing: true,
+      isScanning: false,
+    ));
+  }
+
+  void _onClearDetectedBook(ClearDetectedBook event, Emitter<ScannerState> emit) {
+    emit(state.copyWith(
+      isScanning: false,
+      clearDetectedBookData: true,
+      isProcessing: false,
+    ));
+  }
+}

bookshelf_flutter/lib/bloc/scanner/scanner_event.dart

@@ -0,0 +1,20 @@
+abstract class ScannerEvent {
+  const ScannerEvent();
+}
+
+class StartScanning extends ScannerEvent {
+  const StartScanning();
+}
+
+class StopScanning extends ScannerEvent {
+  const StopScanning();
+}
+
+class BookDetected extends ScannerEvent {
+  final Map<String, dynamic> bookData;
+  const BookDetected(this.bookData);
+}
+
+class ClearDetectedBook extends ScannerEvent {
+  const ClearDetectedBook();
+}

bookshelf_flutter/lib/bloc/scanner/scanner_state.dart

@@ -0,0 +1,42 @@
+import 'package:equatable/equatable.dart';
+
+class ScannerState extends Equatable {
+  final bool isScanning;
+  final bool isProcessing;
+  final Map<String, dynamic>? detectedBookData;
+  final String? errorMessage;
+
+  const ScannerState({
+    this.isScanning = false,
+    this.isProcessing = false,
+    this.detectedBookData,
+    this.errorMessage,
+  });
+
+  factory ScannerState.initial() {
+    return const ScannerState();
+  }
+
+  ScannerState copyWith({
+    bool? isScanning,
+    bool? isProcessing,
+    Map<String, dynamic>? detectedBookData,
+    String? errorMessage,
+    bool clearDetectedBookData = false,
+  }) {
+    return ScannerState(
+      isScanning: isScanning ?? this.isScanning,
+      isProcessing: isProcessing ?? this.isProcessing,
+      detectedBookData: clearDetectedBookData ? null : (detectedBookData ?? this.detectedBookData),
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        isScanning,
+        isProcessing,
+        detectedBookData,
+        errorMessage,
+      ];
+}

bookshelf_flutter/lib/bloc/settings/settings_bloc.dart

@@ -0,0 +1,39 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'settings_event.dart';
+import 'settings_state.dart';
+
+class SettingsBloc extends Bloc<SettingsEvent, SettingsState> {
+  SettingsBloc() : super(SettingsState.initial()) {
+    on<LoadSettings>(_onLoadSettings);
+    on<UpdateTheme>(_onUpdateTheme);
+    on<UpdateLanguage>(_onUpdateLanguage);
+    on<ToggleNotifications>(_onToggleNotifications);
+    on<ClearData>(_onClearData);
+  }
+
+  void _onLoadSettings(LoadSettings event, Emitter<SettingsState> emit) {
+    emit(state.copyWith(
+      isDarkMode: false,
+      language: 'English',
+      notificationsEnabled: true,
+      isLoading: false,
+    ));
+  }
+
+  void _onUpdateTheme(UpdateTheme event, Emitter<SettingsState> emit) {
+    emit(state.copyWith(isDarkMode: event.isDarkMode));
+  }
+
+  void _onUpdateLanguage(UpdateLanguage event, Emitter<SettingsState> emit) {
+    emit(state.copyWith(language: event.language));
+  }
+
+  void _onToggleNotifications(
+      ToggleNotifications event, Emitter<SettingsState> emit) {
+    emit(state.copyWith(notificationsEnabled: !state.notificationsEnabled));
+  }
+
+  void _onClearData(ClearData event, Emitter<SettingsState> emit) {
+    emit(state.copyWith(dataCleared: true));
+  }
+}

bookshelf_flutter/lib/bloc/settings/settings_event.dart

@@ -0,0 +1,25 @@
+abstract class SettingsEvent {
+  const SettingsEvent();
+}
+
+class LoadSettings extends SettingsEvent {
+  const LoadSettings();
+}
+
+class UpdateTheme extends SettingsEvent {
+  final bool isDarkMode;
+  const UpdateTheme(this.isDarkMode);
+}
+
+class UpdateLanguage extends SettingsEvent {
+  final String language;
+  const UpdateLanguage(this.language);
+}
+
+class ToggleNotifications extends SettingsEvent {
+  const ToggleNotifications();
+}
+
+class ClearData extends SettingsEvent {
+  const ClearData();
+}

bookshelf_flutter/lib/bloc/settings/settings_state.dart

@@ -0,0 +1,53 @@
+import 'package:equatable/equatable.dart';
+
+class SettingsState extends Equatable {
+  final bool isDarkMode;
+  final String language;
+  final bool notificationsEnabled;
+  final bool dataCleared;
+  final bool isLoading;
+  final String? errorMessage;
+
+  const SettingsState({
+    this.isDarkMode = false,
+    this.language = 'English',
+    this.notificationsEnabled = true,
+    this.dataCleared = false,
+    this.isLoading = false,
+    this.errorMessage,
+  });
+
+  factory SettingsState.initial() {
+    return const SettingsState(
+      isLoading: true,
+    );
+  }
+
+  SettingsState copyWith({
+    bool? isDarkMode,
+    String? language,
+    bool? notificationsEnabled,
+    bool? dataCleared,
+    bool? isLoading,
+    String? errorMessage,
+  }) {
+    return SettingsState(
+      isDarkMode: isDarkMode ?? this.isDarkMode,
+      language: language ?? this.language,
+      notificationsEnabled: notificationsEnabled ?? this.notificationsEnabled,
+      dataCleared: dataCleared ?? this.dataCleared,
+      isLoading: isLoading ?? this.isLoading,
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        isDarkMode,
+        language,
+        notificationsEnabled,
+        dataCleared,
+        isLoading,
+        errorMessage,
+      ];
+}

bookshelf_flutter/lib/bloc/wishlist/wishlist_bloc.dart

@@ -0,0 +1,93 @@
+import 'package:flutter_bloc/flutter_bloc.dart';
+import '../../models/models.dart';
+import 'wishlist_event.dart';
+import 'wishlist_state.dart';
+
+class WishlistBloc extends Bloc<WishlistEvent, WishlistState> {
+  WishlistBloc() : super(WishlistState.initial()) {
+    on<LoadWishlist>(_onLoadWishlist);
+    on<RemoveFromWishlist>(_onRemoveFromWishlist);
+    on<SearchWishlist>(_onSearchWishlist);
+    on<MoveToLibrary>(_onMoveToLibrary);
+  }
+
+  static List<Book> get _initialBooks => [
+        createBook(
+          id: '2',
+          title: '1984',
+          author: 'Джордж Оруэлл',
+          genre: 'Dystopian',
+          annotation:
+              'Антиутопия о тоталитарном государстве, где мысли контролируются, а правда переменчива.',
+          coverUrl: 'https://picsum.photos/seed/1984/400/600',
+          pages: 328,
+          language: 'English',
+          publishedYear: 1949,
+          rating: 4.9,
+          status: BookStatus.wantToRead,
+          isFavorite: true,
+        ),
+      ];
+
+  void _onLoadWishlist(LoadWishlist event, Emitter<WishlistState> emit) {
+    final wishlistBooks = _initialBooks.where((book) {
+      return book.status == BookStatus.wantToRead || book.isFavorite;
+    }).toList();
+    
+    emit(state.copyWith(
+      books: wishlistBooks,
+      filteredBooks: wishlistBooks,
+      isLoading: false,
+    ));
+  }
+
+  void _onRemoveFromWishlist(RemoveFromWishlist event, Emitter<WishlistState> emit) {
+    final updatedBooks = state.books.where((book) => book.id != event.bookId).toList();
+    final updatedFiltered = state.filteredBooks.where((book) => book.id != event.bookId).toList();
+    
+    emit(state.copyWith(
+      books: updatedBooks,
+      filteredBooks: updatedFiltered,
+    ));
+  }
+
+  void _onSearchWishlist(SearchWishlist event, Emitter<WishlistState> emit) {
+    final query = event.query.toLowerCase();
+    final filtered = state.books.where((book) {
+      return book.title.toLowerCase().contains(query) ||
+          book.author.toLowerCase().contains(query) ||
+          book.genre.toLowerCase().contains(query);
+    }).toList();
+    
+    emit(state.copyWith(
+      searchQuery: event.query,
+      filteredBooks: filtered,
+    ));
+  }
+
+  void _onMoveToLibrary(MoveToLibrary event, Emitter<WishlistState> emit) {
+    final updatedBooks = state.books.map((book) {
+      if (book.id == event.bookId) {
+        return book.copyWith(
+          status: BookStatus.reading,
+        );
+      }
+      return book;
+    }).toList();
+    
+    final updatedFiltered = state.filteredBooks.map((book) {
+      if (book.id == event.bookId) {
+        return book.copyWith(
+          status: BookStatus.reading,
+        );
+      }
+      return book;
+    }).toList();
+    
+    emit(state.copyWith(
+      books: updatedBooks,
+      filteredBooks: updatedFiltered,
+      movedBookId: event.bookId,
+    ));
+  }
+}

bookshelf_flutter/lib/bloc/wishlist/wishlist_event.dart

@@ -0,0 +1,22 @@
+abstract class WishlistEvent {
+  const WishlistEvent();
+}
+
+class LoadWishlist extends WishlistEvent {
+  const LoadWishlist();
+}
+
+class RemoveFromWishlist extends WishlistEvent {
+  final String bookId;
+  const RemoveFromWishlist(this.bookId);
+}
+
+class SearchWishlist extends WishlistEvent {
+  final String query;
+  const SearchWishlist(this.query);
+}
+
+class MoveToLibrary extends WishlistEvent {
+  final String bookId;
+  const MoveToLibrary(this.bookId);
+}

bookshelf_flutter/lib/bloc/wishlist/wishlist_state.dart

@@ -0,0 +1,54 @@
+import 'package:equatable/equatable.dart';
+import '../../models/models.dart';
+
+class WishlistState extends Equatable {
+  final List<Book> books;
+  final List<Book> filteredBooks;
+  final String searchQuery;
+  final String? movedBookId;
+  final bool isLoading;
+  final String? errorMessage;
+
+  const WishlistState({
+    this.books = const [],
+    this.filteredBooks = const [],
+    this.searchQuery = '',
+    this.movedBookId,
+    this.isLoading = false,
+    this.errorMessage,
+  });
+
+  factory WishlistState.initial() {
+    return const WishlistState(
+      isLoading: true,
+    );
+  }
+
+  WishlistState copyWith({
+    List<Book>? books,
+    List<Book>? filteredBooks,
+    String? searchQuery,
+    String? movedBookId,
+    bool? isLoading,
+    String? errorMessage,
+  }) {
+    return WishlistState(
+      books: books ?? this.books,
+      filteredBooks: filteredBooks ?? this.filteredBooks,
+      searchQuery: searchQuery ?? this.searchQuery,
+      movedBookId: movedBookId,
+      isLoading: isLoading ?? this.isLoading,
+      errorMessage: errorMessage ?? this.errorMessage,
+    );
+  }
+
+  @override
+  List<Object?> get props => [
+        books,
+        filteredBooks,
+        searchQuery,
+        movedBookId,
+        isLoading,
+        errorMessage,
+      ];
+}