bookshelf/bookshelf_flutter/lib/bloc/scanner/scanner_bloc.dart

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,
    ));
  }
}