50 lines
1.8 KiB
Dart
50 lines
1.8 KiB
Dart
import 'package:hydrated_bloc/hydrated_bloc.dart';
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import 'grade_averages_event.dart';
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import 'grade_averages_state.dart';
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class GradeAveragesBloc extends HydratedBloc<GradeAveragesEvent, GradeAveragesState> {
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GradeAveragesBloc() : super(const GradeAveragesState(gradingSystem: GradeAveragesGradingSystem.middleSchool, grades: [])) {
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on<GradingSystemChanged>((event, emit) {
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add(ResetAll());
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emit(
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state.copyWith(
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gradingSystem: event.isMiddleSchool
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? GradeAveragesGradingSystem.middleSchool
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: GradeAveragesGradingSystem.highSchool
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)
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);
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});
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on<ResetAll>((event, emit) {
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emit(state.copyWith(grades: []));
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});
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on<ResetGrade>((event, emit) {
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emit(state.copyWith(grades: [...state.grades]..removeWhere((grade) => grade == event.grade)));
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});
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on<IncrementGrade>((event, emit) {
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emit(state.copyWith(grades: [...state.grades, event.grade]));
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});
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on<DecrementGrade>((event, emit) {
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emit(state.copyWith(grades: List.from(state.grades)..remove(event.grade)));
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});
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}
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double average() => state.grades.isEmpty ? 0 : state.grades.reduce((a, b) => a + b) / state.grades.length;
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bool isMiddleSchool() => state.gradingSystem == GradeAveragesGradingSystem.middleSchool;
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bool canDecrementOrDelete(int grade) => state.grades.contains(grade);
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int countOfGrade(int grade) => state.grades.where((g) => g == grade).length;
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int gradesInGradingSystem() => state.gradingSystem == GradeAveragesGradingSystem.middleSchool ? 6 : 16;
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int getGradeFromIndex(int index) => isMiddleSchool() ? index + 1 : 15 - index;
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@override
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GradeAveragesState? fromJson(Map<String, dynamic> json) => GradeAveragesState.fromJson(json);
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@override
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Map<String, dynamic>? toJson(GradeAveragesState state) => state.toJson();
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}
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