Flutter 앱: MVCS 아키텍처 리팩토링 (일정 화면)

- controllers/ 폴더 추가
- ScheduleController 생성 (Riverpod Notifier)
- ScheduleState 상태 클래스 분리
- ScheduleView를 ConsumerStatefulWidget으로 변경
- View는 UI 렌더링만, 비즈니스 로직은 Controller로 분리

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/lib/controllers/schedule_controller.dart

@@ -0,0 +1,132 @@
+/// 일정 컨트롤러 (MVCS의 Controller 레이어)
+///
+/// 비즈니스 로직과 상태 관리를 담당합니다.
+/// View는 이 Controller를 통해 데이터에 접근합니다.
+library;
+
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:intl/intl.dart';
+import '../models/schedule.dart';
+import '../services/schedules_service.dart';
+
+/// 일정 상태
+class ScheduleState {
+  final DateTime selectedDate;
+  final List<Schedule> schedules;
+  final bool isLoading;
+  final String? error;
+
+  const ScheduleState({
+    required this.selectedDate,
+    this.schedules = const [],
+    this.isLoading = false,
+    this.error,
+  });
+
+  /// 상태 복사 (불변성 유지)
+  ScheduleState copyWith({
+    DateTime? selectedDate,
+    List<Schedule>? schedules,
+    bool? isLoading,
+    String? error,
+  }) {
+    return ScheduleState(
+      selectedDate: selectedDate ?? this.selectedDate,
+      schedules: schedules ?? this.schedules,
+      isLoading: isLoading ?? this.isLoading,
+      error: error,
+    );
+  }
+
+  /// 선택된 날짜의 일정 목록
+  List<Schedule> get selectedDateSchedules {
+    final dateStr = DateFormat('yyyy-MM-dd').format(selectedDate);
+    return schedules.where((s) => s.date.split('T')[0] == dateStr).toList();
+  }
+
+  /// 특정 날짜의 일정 (점 표시용, 최대 3개)
+  List<Schedule> getDaySchedules(DateTime date) {
+    final dateStr = DateFormat('yyyy-MM-dd').format(date);
+    return schedules.where((s) => s.date.split('T')[0] == dateStr).take(3).toList();
+  }
+
+  /// 해당 달의 모든 날짜 배열
+  List<DateTime> get daysInMonth {
+    final year = selectedDate.year;
+    final month = selectedDate.month;
+    final lastDay = DateTime(year, month + 1, 0).day;
+    return List.generate(lastDay, (i) => DateTime(year, month, i + 1));
+  }
+}
+
+/// 일정 컨트롤러
+class ScheduleController extends Notifier<ScheduleState> {
+  @override
+  ScheduleState build() {
+    // 초기 상태
+    final initialState = ScheduleState(selectedDate: DateTime.now());
+    // 초기 데이터 로드
+    Future.microtask(() => loadSchedules());
+    return initialState;
+  }
+
+  /// 월별 일정 로드
+  Future<void> loadSchedules() async {
+    state = state.copyWith(isLoading: true, error: null);
+
+    try {
+      final schedules = await getSchedules(
+        state.selectedDate.year,
+        state.selectedDate.month,
+      );
+      state = state.copyWith(schedules: schedules, isLoading: false);
+    } catch (e) {
+      state = state.copyWith(isLoading: false, error: e.toString());
+    }
+  }
+
+  /// 날짜 선택
+  void selectDate(DateTime date) {
+    state = state.copyWith(selectedDate: date);
+  }
+
+  /// 월 변경
+  void changeMonth(int delta) {
+    final newDate = DateTime(
+      state.selectedDate.year,
+      state.selectedDate.month + delta,
+      1,
+    );
+    final today = DateTime.now();
+
+    // 이번 달이면 오늘 날짜, 다른 달이면 1일 선택
+    final selectedDay = (newDate.year == today.year && newDate.month == today.month)
+        ? today.day
+        : 1;
+
+    state = state.copyWith(
+      selectedDate: DateTime(newDate.year, newDate.month, selectedDay),
+    );
+    loadSchedules();
+  }
+
+  /// 오늘 여부
+  bool isToday(DateTime date) {
+    final today = DateTime.now();
+    return date.year == today.year &&
+        date.month == today.month &&
+        date.day == today.day;
+  }
+
+  /// 선택된 날짜 여부
+  bool isSelected(DateTime date) {
+    return date.year == state.selectedDate.year &&
+        date.month == state.selectedDate.month &&
+        date.day == state.selectedDate.day;
+  }
+}
+
+/// 일정 Provider
+final scheduleProvider = NotifierProvider<ScheduleController, ScheduleState>(
+  ScheduleController.new,
+);

app/lib/views/schedule/schedule_view.dart

@@ -1,11 +1,13 @@
-/// 일정 화면
+/// 일정 화면 (MVCS의 View 레이어)
+///
+/// UI 렌더링만 담당하고, 비즈니스 로직은 Controller에 위임합니다.
 library;
 
 import 'package:flutter/material.dart';
-import 'package:intl/intl.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
 import '../../core/constants.dart';
 import '../../models/schedule.dart';
-import '../../services/schedules_service.dart';
+import '../../controllers/schedule_controller.dart';
 
 /// HTML 엔티티 디코딩
 String decodeHtmlEntities(String text) {
@@ -18,25 +20,17 @@ String decodeHtmlEntities(String text) {
       .replaceAll(' ', ' ');
 }
 
-class ScheduleView extends StatefulWidget {
+class ScheduleView extends ConsumerStatefulWidget {
   const ScheduleView({super.key});
 
   @override
-  State<ScheduleView> createState() => _ScheduleViewState();
+  ConsumerState<ScheduleView> createState() => _ScheduleViewState();
 }
 
-class _ScheduleViewState extends State<ScheduleView> {
-  DateTime _selectedDate = DateTime.now();
-  List<Schedule> _schedules = [];
-  bool _isLoading = true;
+class _ScheduleViewState extends ConsumerState<ScheduleView> {
   final ScrollController _dateScrollController = ScrollController();
   final ScrollController _contentScrollController = ScrollController();
-
-  @override
-  void initState() {
-    super.initState();
-    _loadSchedules();
-  }
+  DateTime? _lastSelectedDate;
 
   @override
   void dispose() {
@@ -45,35 +39,15 @@ class _ScheduleViewState extends State<ScheduleView> {
     super.dispose();
   }
 
-  /// 월별 일정 로드
-  Future<void> _loadSchedules() async {
-    setState(() => _isLoading = true);
-    try {
-      final schedules = await getSchedules(
-        _selectedDate.year,
-        _selectedDate.month,
-      );
-      setState(() {
-        _schedules = schedules;
-        _isLoading = false;
-      });
-      // 선택된 날짜로 스크롤
-      WidgetsBinding.instance.addPostFrameCallback((_) {
-        _scrollToSelectedDate();
-      });
-    } catch (e) {
-      setState(() => _isLoading = false);
-    }
-  }
-
   /// 선택된 날짜로 스크롤
-  void _scrollToSelectedDate() {
+  void _scrollToSelectedDate(DateTime selectedDate) {
     if (!_dateScrollController.hasClients) return;
 
-    final dayIndex = _selectedDate.day - 1;
+    final dayIndex = selectedDate.day - 1;
     const itemWidth = 52.0; // 44 + 8 (gap)
     final targetOffset = (dayIndex * itemWidth) -
-        (MediaQuery.of(context).size.width / 2) + (itemWidth / 2);
+        (MediaQuery.of(context).size.width / 2) +
+        (itemWidth / 2);
     _dateScrollController.animateTo(
       targetOffset.clamp(0, _dateScrollController.position.maxScrollExtent),
       duration: const Duration(milliseconds: 150),
@@ -81,51 +55,16 @@ class _ScheduleViewState extends State<ScheduleView> {
     );
   }
 
-  /// 월 변경
-  void _changeMonth(int delta) {
-    final newDate = DateTime(_selectedDate.year, _selectedDate.month + delta, 1);
-    final today = DateTime.now();
-
-    // 이번 달이면 오늘 날짜, 다른 달이면 1일 선택
-    final selectedDay = (newDate.year == today.year && newDate.month == today.month)
-        ? today.day
-        : 1;
-
-    setState(() {
-      _selectedDate = DateTime(newDate.year, newDate.month, selectedDay);
-    });
-    _loadSchedules();
-  }
-
-  /// 날짜 선택
-  void _selectDate(DateTime date) {
-    // 일정 목록 맨 위로 즉시 이동 (애니메이션과 겹치지 않도록)
+  /// 날짜 선택 핸들러
+  void _onDateSelected(DateTime date) {
+    // 일정 목록 맨 위로 즉시 이동
     if (_contentScrollController.hasClients) {
       _contentScrollController.jumpTo(0);
     }
-    setState(() => _selectedDate = date);
-    // 선택된 날짜 중앙으로 스크롤
-    _scrollToSelectedDate();
-  }
-
-  /// 해당 달의 모든 날짜 배열
-  List<DateTime> get _daysInMonth {
-    final year = _selectedDate.year;
-    final month = _selectedDate.month;
-    final lastDay = DateTime(year, month + 1, 0).day;
-    return List.generate(lastDay, (i) => DateTime(year, month, i + 1));
-  }
-
-  /// 선택된 날짜의 일정
-  List<Schedule> get _selectedDateSchedules {
-    final dateStr = DateFormat('yyyy-MM-dd').format(_selectedDate);
-    return _schedules.where((s) => s.date.split('T')[0] == dateStr).toList();
-  }
-
-  /// 특정 날짜의 일정 (점 표시용)
-  List<Schedule> _getDaySchedules(DateTime date) {
-    final dateStr = DateFormat('yyyy-MM-dd').format(date);
-    return _schedules.where((s) => s.date.split('T')[0] == dateStr).take(3).toList();
+    // Controller에 날짜 선택 요청
+    ref.read(scheduleProvider.notifier).selectDate(date);
+    // 선택된 날짜로 스크롤
+    _scrollToSelectedDate(date);
   }
 
   /// 요일 이름
@@ -134,21 +73,6 @@ class _ScheduleViewState extends State<ScheduleView> {
     return days[date.weekday % 7];
   }
 
-  /// 오늘 여부
-  bool _isToday(DateTime date) {
-    final today = DateTime.now();
-    return date.year == today.year &&
-           date.month == today.month &&
-           date.day == today.day;
-  }
-
-  /// 선택된 날짜 여부
-  bool _isSelected(DateTime date) {
-    return date.year == _selectedDate.year &&
-           date.month == _selectedDate.month &&
-           date.day == _selectedDate.day;
-  }
-
   /// 카테고리 색상 파싱
   Color _parseColor(String? colorStr) {
     if (colorStr == null || colorStr.isEmpty) return AppColors.textTertiary;
@@ -162,22 +86,33 @@ class _ScheduleViewState extends State<ScheduleView> {
 
   @override
   Widget build(BuildContext context) {
+    final scheduleState = ref.watch(scheduleProvider);
+    final controller = ref.read(scheduleProvider.notifier);
+
+    // 날짜가 변경되면 스크롤
+    if (_lastSelectedDate != scheduleState.selectedDate) {
+      _lastSelectedDate = scheduleState.selectedDate;
+      WidgetsBinding.instance.addPostFrameCallback((_) {
+        _scrollToSelectedDate(scheduleState.selectedDate);
+      });
+    }
+
     return Column(
       children: [
         // 자체 툴바
-        _buildToolbar(),
+        _buildToolbar(scheduleState, controller),
         // 날짜 선택기
-        _buildDateSelector(),
+        _buildDateSelector(scheduleState, controller),
         // 일정 목록
         Expanded(
-          child: _buildScheduleList(),
+          child: _buildScheduleList(scheduleState),
         ),
       ],
     );
   }
 
   /// 툴바 빌드
-  Widget _buildToolbar() {
+  Widget _buildToolbar(ScheduleState state, ScheduleController controller) {
     return Container(
       color: Colors.white,
       child: SafeArea(
@@ -197,7 +132,7 @@ class _ScheduleViewState extends State<ScheduleView> {
               ),
               // 이전 월
               IconButton(
-                onPressed: () => _changeMonth(-1),
+                onPressed: () => controller.changeMonth(-1),
                 icon: const Icon(Icons.chevron_left, size: 24),
                 color: AppColors.textPrimary,
               ),
@@ -205,7 +140,7 @@ class _ScheduleViewState extends State<ScheduleView> {
               Expanded(
                 child: Center(
                   child: Text(
-                    '${_selectedDate.year}년 ${_selectedDate.month}월',
+                    '${state.selectedDate.year}년 ${state.selectedDate.month}월',
                     style: const TextStyle(
                       fontSize: 16,
                       fontWeight: FontWeight.bold,
@@ -216,7 +151,7 @@ class _ScheduleViewState extends State<ScheduleView> {
               ),
               // 다음 월
               IconButton(
-                onPressed: () => _changeMonth(1),
+                onPressed: () => controller.changeMonth(1),
                 icon: const Icon(Icons.chevron_right, size: 24),
                 color: AppColors.textPrimary,
               ),
@@ -236,7 +171,7 @@ class _ScheduleViewState extends State<ScheduleView> {
   }
 
   /// 날짜 선택기 빌드
-  Widget _buildDateSelector() {
+  Widget _buildDateSelector(ScheduleState state, ScheduleController controller) {
     return Container(
       color: Colors.white,
       child: Container(
@@ -255,16 +190,16 @@ class _ScheduleViewState extends State<ScheduleView> {
           controller: _dateScrollController,
           scrollDirection: Axis.horizontal,
           padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 8),
-          itemCount: _daysInMonth.length,
+          itemCount: state.daysInMonth.length,
           itemBuilder: (context, index) {
-            final date = _daysInMonth[index];
-            final isSelected = _isSelected(date);
-            final isToday = _isToday(date);
+            final date = state.daysInMonth[index];
+            final isSelected = controller.isSelected(date);
+            final isToday = controller.isToday(date);
             final dayOfWeek = date.weekday;
-            final daySchedules = _getDaySchedules(date);
+            final daySchedules = state.getDaySchedules(date);
 
             return GestureDetector(
-              onTap: () => _selectDate(date),
+              onTap: () => _onDateSelected(date),
               child: Container(
                 width: 44,
                 margin: const EdgeInsets.symmetric(horizontal: 4),
@@ -315,7 +250,8 @@ class _ScheduleViewState extends State<ScheduleView> {
                                 return Container(
                                   width: 4,
                                   height: 4,
-                                  margin: const EdgeInsets.symmetric(horizontal: 1),
+                                  margin:
+                                      const EdgeInsets.symmetric(horizontal: 1),
                                   decoration: BoxDecoration(
                                     color: _parseColor(schedule.categoryColor),
                                     shape: BoxShape.circle,
@@ -336,17 +272,17 @@ class _ScheduleViewState extends State<ScheduleView> {
   }
 
   /// 일정 목록 빌드
-  Widget _buildScheduleList() {
-    if (_isLoading) {
+  Widget _buildScheduleList(ScheduleState state) {
+    if (state.isLoading) {
       return const Center(
         child: CircularProgressIndicator(color: AppColors.primary),
       );
     }
 
-    if (_selectedDateSchedules.isEmpty) {
+    if (state.selectedDateSchedules.isEmpty) {
       return Center(
         child: Text(
-          '${_selectedDate.month}월 ${_selectedDate.day}일 일정이 없습니다',
+          '${state.selectedDate.month}월 ${state.selectedDate.day}일 일정이 없습니다',
           style: const TextStyle(
             fontSize: 14,
             color: AppColors.textTertiary,
@@ -358,13 +294,14 @@ class _ScheduleViewState extends State<ScheduleView> {
     return ListView.builder(
       controller: _contentScrollController,
       padding: const EdgeInsets.all(16),
-      itemCount: _selectedDateSchedules.length,
+      itemCount: state.selectedDateSchedules.length,
       itemBuilder: (context, index) {
-        final schedule = _selectedDateSchedules[index];
+        final schedule = state.selectedDateSchedules[index];
         return Padding(
-          padding: EdgeInsets.only(bottom: index < _selectedDateSchedules.length - 1 ? 12 : 0),
+          padding: EdgeInsets.only(
+              bottom: index < state.selectedDateSchedules.length - 1 ? 12 : 0),
           child: _AnimatedScheduleCard(
-            key: ValueKey('${schedule.id}_${_selectedDate.toString()}'),
+            key: ValueKey('${schedule.id}_${state.selectedDate.toString()}'),
             index: index,
             schedule: schedule,
             categoryColor: _parseColor(schedule.categoryColor),
@@ -489,7 +426,8 @@ class _ScheduleCard extends StatelessWidget {
                 // 시간 뱃지
                 if (schedule.formattedTime != null)
                   Container(
-                    padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+                    padding:
+                        const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
                     decoration: BoxDecoration(
                       color: categoryColor,
                       borderRadius: BorderRadius.circular(12),
@@ -518,7 +456,8 @@ class _ScheduleCard extends StatelessWidget {
                 // 카테고리 뱃지
                 if (schedule.categoryName != null)
                   Container(
-                    padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+                    padding:
+                        const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
                     decoration: BoxDecoration(
                       color: categoryColor.withValues(alpha: 0.1),
                       borderRadius: BorderRadius.circular(12),
@@ -583,7 +522,9 @@ class _ScheduleCard extends StatelessWidget {
                       ? [
                           _MemberChip(name: '프로미스나인'),
                         ]
-                      : memberList.map((name) => _MemberChip(name: name)).toList(),
+                      : memberList
+                          .map((name) => _MemberChip(name: name))
+                          .toList(),
                 ),
               ),
             ],