修改选择器

ln_jq_app/lib/pages/c_page/reservation/controller.dart

@@ -14,6 +14,20 @@ import 'package:ln_jq_app/storage_service.dart';
 
 import '../../../common/styles/theme.dart';
 
+/// Helper class for managing time slots
+class TimeSlot {
+  final TimeOfDay start;
+  final TimeOfDay end;
+
+  TimeSlot(this.start, this.end);
+
+  String get display {
+    final startStr = '${start.hour.toString().padLeft(2, '0')}:${start.minute.toString().padLeft(2, '0')}';
+    final endStr = '${end.hour.toString().padLeft(2, '0')}:${end.minute.toString().padLeft(2, '0')}';
+    return '$startStr - $endStr';
+  }
+}
+
 class C_ReservationController extends GetxController with BaseControllerMixin {
   @override
   String get builderId => 'reservation';
@@ -28,7 +42,7 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
   TextEditingController plateNumberController = TextEditingController();
 
   final RxList<StationModel> stationOptions = <StationModel>[].obs;
-  final Rxn<String> selectedStationId = Rxn<String>(); // 用 ID 来选择
+  final Rxn<String> selectedStationId = Rxn<String>();
 
   String get formattedDate => DateFormat('yyyy-MM-dd').format(selectedDate.value);
 
@@ -59,23 +73,14 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
                 children: [
                   CupertinoButton(
                     onPressed: () => Get.back(),
-                    child: const Text(
-                      '取消',
-                      style: TextStyle(color: CupertinoColors.systemGrey),
-                    ),
+                    child: const Text('取消', style: TextStyle(color: CupertinoColors.systemGrey)),
                   ),
                   CupertinoButton(
                     onPressed: () {
                       selectedDate.value = tempDate;
                       Get.back();
                     },
-                    child: const Text(
-                      '确认',
-                      style: TextStyle(
-                        color: AppTheme.themeColor,
-                        fontWeight: FontWeight.bold,
-                      ),
-                    ),
+                    child: const Text('确认', style: TextStyle(color: AppTheme.themeColor, fontWeight: FontWeight.bold)),
                   ),
                 ],
               ),
@@ -84,27 +89,8 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
             Expanded(
               child: CupertinoDatePicker(
                 mode: CupertinoDatePickerMode.date,
-                initialDateTime:
-                    selectedDate.value.isBefore(
-                      DateTime(
-                        DateTime.now().year,
-                        DateTime.now().month,
-                        DateTime.now().day,
-                      ),
-                    )
-                    ? DateTime(
-                        DateTime.now().year,
-                        DateTime.now().month,
-                        DateTime.now().day,
-                      )
-                    : selectedDate.value,
-
-                // 设置最小可选日期为“今天凌晨0点”
-                minimumDate: DateTime(
-                  DateTime.now().year,
-                  DateTime.now().month,
-                  DateTime.now().day,
-                ),
+                initialDateTime: selectedDate.value,
+                minimumDate: DateTime(DateTime.now().year, DateTime.now().month, DateTime.now().day),
                 maximumDate: DateTime.now().add(const Duration(days: 365)),
                 onDateTimeChanged: (DateTime newDate) {
                   tempDate = newDate;
@@ -118,52 +104,50 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
     );
   }
 
-  void pickTime(BuildContext context, bool isStartTime) {
-    // 1. 确定当前操作的时间和初始值
-    TimeOfDay initialTime = isStartTime ? startTime.value : endTime.value;
-    DateTime now = DateTime.now();
+  ///30 分钟为间隔 时间选择器
+  void pickTime(BuildContext context) {
+    final now = DateTime.now();
+    final isToday = selectedDate.value.year == now.year &&
+        selectedDate.value.month == now.month &&
+        selectedDate.value.day == now.day;
 
-    // 2. 准备小时和分钟的数据源
-    List<int> hours = List<int>.generate(24, (index) => index);
-    List<int> minutes = [0, 30];
+    final List<TimeSlot> availableSlots = [];
+    for (int i = 0; i < 48; i++) {
+      final startMinutes = i * 30;
+      final endMinutes = startMinutes + 30;
 
-    // 3. 计算初始选中的索引
-    int initialHour = initialTime.hour;
-    // 将初始分钟校准到0或30，并找到对应的索引
-    int initialMinute = initialTime.minute;
-    int minuteIndex = initialMinute < 30 ? 0 : 1;
-    initialMinute = minutes[minuteIndex]; // 校准后的分钟
+      final startTime = TimeOfDay(hour: startMinutes ~/ 60, minute: startMinutes % 60);
+      final endTime = TimeOfDay(hour: (endMinutes ~/ 60) % 24, minute: endMinutes % 60);
 
-    // 如果校准后导致时间早于当前时间，需要向上调整
-    final selectedDay = DateTime(selectedDate.value.year, selectedDate.value.month, selectedDate.value.day);
-    final today = DateTime(now.year, now.month, now.day);
-    if (selectedDay.isAtSameMomentAs(today)) {
-      if (initialHour < now.hour || (initialHour == now.hour && initialMinute < now.minute)) {
-        initialHour = now.hour;
-        if (now.minute > 30) {
-          // 如果当前分钟>30, 则进位到下一小时的0分
-          initialHour = (now.hour + 1) % 24;
-          initialMinute = 0;
-        } else {
-          // 否则，取30分
-          initialMinute = 30;
-        }
+      final slotStartDateTime = DateTime(
+        selectedDate.value.year,
+        selectedDate.value.month,
+        selectedDate.value.day,
+        startTime.hour,
+        startTime.minute,
+      );
+
+      if (!isToday || slotStartDateTime.isAfter(now)) {
+        availableSlots.add(TimeSlot(startTime, endTime));
       }
     }
 
-    // 重新获取校准后的索引
-    minuteIndex = minutes.indexOf(initialMinute);
+    if (availableSlots.isEmpty) {
+      showToast('今天已没有可预约的时间段');
+      return;
+    }
 
+    int initialItem = availableSlots.indexWhere((slot) =>
+        slot.start.hour == startTime.value.hour &&
+        (startTime.value.minute < 30 ? slot.start.minute == 0 : slot.start.minute == 30));
+    if (initialItem == -1) {
+      initialItem = 0;
+    }
 
-    // 4. 创建 FixedExtentScrollController 来控制滚轮的初始位置
-    final FixedExtentScrollController hourController =
-    FixedExtentScrollController(initialItem: hours.indexOf(initialHour));
-    final FixedExtentScrollController minuteController =
-    FixedExtentScrollController(initialItem: minuteIndex);
+    TimeSlot tempSlot = availableSlots[initialItem];
 
-    // 5. 存储临时选择的值
-    int tempHour = initialHour;
-    int tempMinute = initialMinute;
+    final FixedExtentScrollController scrollController =
+        FixedExtentScrollController(initialItem: initialItem);
 
     Get.bottomSheet(
       Container(
@@ -188,88 +172,25 @@ class C_ReservationController extends GetxController with BaseControllerMixin {
                   ),
                   CupertinoButton(
                     onPressed: () {
-                      final pickedTempTime = TimeOfDay(hour: tempHour, minute: tempMinute);
-                      final now = DateTime.now();
-
-                      // --- 合并和简化校验逻辑 ---
-                      final selectedDateTime = DateTime(
-                        selectedDate.value.year,
-                        selectedDate.value.month,
-                        selectedDate.value.day,
-                        pickedTempTime.hour,
-                        pickedTempTime.minute,
-                      );
-
-                      // 验证1: 不能选择过去的时间（留出一分钟缓冲）
-                      if (selectedDateTime.isBefore(now.subtract(const Duration(minutes: 1)))) {
-                        showToast('不能选择过去的时间');
-                        return;
-                      }
-
-                      // 验证2: 结束时间必须晚于开始时间
-                      if (isStartTime) {
-                        startTime.value = pickedTempTime;
-                        final startInMinutes = pickedTempTime.hour * 60 + pickedTempTime.minute;
-                        final endInMinutes = endTime.value.hour * 60 + endTime.value.minute;
-
-                        // 如果新的开始时间大于等于结束时间，自动将结束时间设置为开始时间+30分钟
-                        if (startInMinutes >= endInMinutes) {
-                          final newEndDateTime = selectedDateTime.add(const Duration(minutes: 30));
-                          endTime.value = TimeOfDay.fromDateTime(newEndDateTime);
-                        }
-                      } else { // 正在设置结束时间
-                        final startInMinutes = startTime.value.hour * 60 + startTime.value.minute;
-                        final endInMinutes = pickedTempTime.hour * 60 + pickedTempTime.minute;
-
-                        if (endInMinutes <= startInMinutes) {
-                          showToast('结束时间必须晚于开始时间');
-                          return;
-                        }
-                        endTime.value = pickedTempTime;
-                      }
-
+                      startTime.value = tempSlot.start;
+                      endTime.value = tempSlot.end;
                       Get.back();
                     },
-                    child: const Text(
-                      '确认',
-                      style: TextStyle(color: AppTheme.themeColor, fontWeight: FontWeight.bold),
-                    ),
+                    child: const Text('确认', style: TextStyle(color: AppTheme.themeColor, fontWeight: FontWeight.bold)),
                   ),
                 ],
               ),
             ),
             const Divider(height: 1, color: Color(0xFFE5E5E5)),
             Expanded(
-              child: Row(
-                mainAxisAlignment: MainAxisAlignment.center,
-                children: [
-                  // 小时选择器
-                  Expanded(
-                    child: CupertinoPicker(
-                      scrollController: hourController,
-                      itemExtent: 32.0,
-                      onSelectedItemChanged: (index) {
-                        tempHour = hours[index];
-                      },
-                      children: hours
-                          .map((h) => Center(child: Text(h.toString().padLeft(2, '0'))))
-                          .toList(),
-                    ),
-                  ),
-                  // 分钟选择器
-                  Expanded(
-                    child: CupertinoPicker(
-                      scrollController: minuteController,
-                      itemExtent: 32.0,
-                      onSelectedItemChanged: (index) {
-                        tempMinute = minutes[index];
-                      },
-                      children: minutes
-                          .map((m) => Center(child: Text(m.toString().padLeft(2, '0'))))
-                          .toList(),
-                    ),
-                  ),
-                ],
+              child: CupertinoPicker(
+                scrollController: scrollController,
+                itemExtent: 40.0,
+                onSelectedItemChanged: (index) {
+                  tempSlot = availableSlots[index];
+                },
+                children:
+                    availableSlots.map((slot) => Center(child: Text(slot.display))).toList(),
               ),
             ),
           ],