open ai service

books_flutter/lib/bloc/add_book/add_book_bloc.dart

@@ -0,0 +1,97 @@
+import 'dart:math';
+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> {
+  final void Function(Book book) onAddBook;
+  final void Function(Book book) onUpdateBook;
+
+  AddBookBloc({required this.onAddBook, required this.onUpdateBook})
+    : super(const AddBookState()) {
+    on<InitializeForm>(_onInitializeForm);
+    on<UpdateTitle>(_onUpdateTitle);
+    on<UpdateAuthor>(_onUpdateAuthor);
+    on<UpdateAnnotation>(_onUpdateAnnotation);
+    on<UpdateGenre>(_onUpdateGenre);
+    on<ApplyScannedBook>(_onApplyScannedBook);
+    on<SaveBook>(_onSaveBook);
+  }
+
+  void _onInitializeForm(InitializeForm event, Emitter<AddBookState> emit) {
+    final source = event.editBook ?? event.prefilledData;
+    if (source != null) {
+      emit(
+        AddBookState(
+          title: source.title,
+          author: source.author,
+          annotation: source.annotation,
+          genre: source.genre.isNotEmpty ? source.genre : 'fiction',
+          editBook: event.editBook,
+        ),
+      );
+    } else if (event.editBook != null) {
+      emit(state.copyWith(editBook: event.editBook));
+    }
+  }
+
+  void _onUpdateTitle(UpdateTitle event, Emitter<AddBookState> emit) {
+    emit(state.copyWith(title: event.title));
+  }
+
+  void _onUpdateAuthor(UpdateAuthor event, Emitter<AddBookState> emit) {
+    emit(state.copyWith(author: event.author));
+  }
+
+  void _onUpdateAnnotation(UpdateAnnotation event, Emitter<AddBookState> emit) {
+    emit(state.copyWith(annotation: event.annotation));
+  }
+
+  void _onUpdateGenre(UpdateGenre event, Emitter<AddBookState> emit) {
+    emit(state.copyWith(genre: event.genre));
+  }
+
+  void _onApplyScannedBook(ApplyScannedBook event, Emitter<AddBookState> emit) {
+    final scanned = event.scannedBook;
+    emit(
+      state.copyWith(
+        title: scanned.title,
+        author: scanned.author,
+        annotation: scanned.annotation,
+        genre: scanned.genre.isNotEmpty ? scanned.genre : 'fiction',
+      ),
+    );
+  }
+
+  void _onSaveBook(SaveBook event, Emitter<AddBookState> emit) {
+    final existing = state.editBook;
+    final isEditing = existing != null;
+
+    final Book book = (
+      id: isEditing ? existing.id : '${Random().nextInt(100000)}',
+      title: state.title,
+      author: state.author,
+      genre: state.genre,
+      annotation: state.annotation,
+      coverUrl: isEditing
+          ? existing.coverUrl
+          : 'https://picsum.photos/seed/newbook/400/600',
+      pages: isEditing ? existing.pages : 0,
+      language: isEditing ? existing.language : 'Russian',
+      publishedYear: isEditing ? existing.publishedYear : DateTime.now().year,
+      rating: isEditing ? existing.rating : 5.0,
+      status: isEditing ? existing.status : 'want_to_read',
+      progress: isEditing ? existing.progress : null,
+      isFavorite: isEditing ? existing.isFavorite : false,
+    );
+
+    if (isEditing) {
+      onUpdateBook(book);
+    } else {
+      onAddBook(book);
+    }
+
+    emit(state.copyWith(isSaved: true));
+  }
+}

books_flutter/lib/bloc/add_book/add_book_event.dart

@@ -0,0 +1,37 @@
+import '../../models/models.dart';
+
+sealed class AddBookEvent {}
+
+class InitializeForm extends AddBookEvent {
+  final Book? editBook;
+  final Book? prefilledData;
+
+  InitializeForm({this.editBook, this.prefilledData});
+}
+
+class UpdateTitle extends AddBookEvent {
+  final String title;
+  UpdateTitle(this.title);
+}
+
+class UpdateAuthor extends AddBookEvent {
+  final String author;
+  UpdateAuthor(this.author);
+}
+
+class UpdateAnnotation extends AddBookEvent {
+  final String annotation;
+  UpdateAnnotation(this.annotation);
+}
+
+class UpdateGenre extends AddBookEvent {
+  final String genre;
+  UpdateGenre(this.genre);
+}
+
+class ApplyScannedBook extends AddBookEvent {
+  final Book scannedBook;
+  ApplyScannedBook(this.scannedBook);
+}
+
+class SaveBook extends AddBookEvent {}

books_flutter/lib/bloc/add_book/add_book_state.dart

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+import '../../models/models.dart';
+
+class AddBookState {
+  final String title;
+  final String author;
+  final String annotation;
+  final String genre;
+  final Book? editBook;
+  final bool isSaved;
+
+  const AddBookState({
+    this.title = '',
+    this.author = '',
+    this.annotation = '',
+    this.genre = 'fiction',
+    this.editBook,
+    this.isSaved = false,
+  });
+
+  bool get isEditing => editBook != null;
+
+  AddBookState copyWith({
+    String? title,
+    String? author,
+    String? annotation,
+    String? genre,
+    Book? editBook,
+    bool? isSaved,
+  }) {
+    return AddBookState(
+      title: title ?? this.title,
+      author: author ?? this.author,
+      annotation: annotation ?? this.annotation,
+      genre: genre ?? this.genre,
+      editBook: editBook ?? this.editBook,
+      isSaved: isSaved ?? this.isSaved,
+    );
+  }
+}