feat: link transit registration to boxing

lib/pages/registration_page.dart

@@ -7,6 +7,8 @@ import 'package:pad_scanner/services/scanner_service.dart';
 import 'package:pad_scanner/services/code_parser.dart';
 import 'package:pad_scanner/services/api_service.dart';
 import 'package:pad_scanner/services/feedback_service.dart';
+import 'package:pad_scanner/services/registration_linking.dart';
+import 'package:pad_scanner/pages/boxing_page.dart';
 import 'package:pad_scanner/widgets/status_bar.dart';
 
 class RegistrationPage extends StatefulWidget {
@@ -44,7 +46,7 @@ class _RegistrationPageState extends State<RegistrationPage> {
   @override
   void initState() {
     super.initState();
-    _scanSubscription = _scannerService.scanResults.listen(_onScan);
+    _startScanListening();
     WidgetsBinding.instance.addPostFrameCallback((_) {
       _focusNode.requestFocus();
     });
@@ -58,6 +60,27 @@ class _RegistrationPageState extends State<RegistrationPage> {
     super.dispose();
   }
 
+  void _startScanListening() {
+    _scanSubscription ??= _scannerService.scanResults.listen(_onScan);
+  }
+
+  Future<void> _stopScanListening() async {
+    final subscription = _scanSubscription;
+    _scanSubscription = null;
+    await subscription?.cancel();
+  }
+
+  void _restartScanListening() {
+    _scanSubscription?.cancel();
+    _scanSubscription = null;
+    _startScanListening();
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (mounted) {
+        _focusNode.requestFocus();
+      }
+    });
+  }
+
   void _onKeyEvent(KeyEvent event) {
     if (event is KeyDownEvent && event.logicalKey == LogicalKeyboardKey.enter) {
       _submit();
@@ -78,7 +101,7 @@ class _RegistrationPageState extends State<RegistrationPage> {
             _locationType = parsed.type;
             _clearStatusOverride();
           });
-        }
+        } else {}
       case CodeType.invalid:
         _feedbackService.trigger(FeedbackEvent.scanInvalid);
         _showStatusOverride(
@@ -163,6 +186,8 @@ class _RegistrationPageState extends State<RegistrationPage> {
   bool get _canSubmit =>
       _zongpaiNos.isNotEmpty && _locationCode != null && !_isSubmitting;
 
+  bool get _isTransitTarget => isTransitTarget(_locationType, _locationCode);
+
   Future<String?> _baseUrl() async {
     final configService = AppConfigService();
     final baseUrl = await configService.getString('api_url') ?? '';
@@ -239,12 +264,49 @@ class _RegistrationPageState extends State<RegistrationPage> {
     setState(() => _isSubmitting = true);
 
     if (_isLocked && _zongpaiNos.length > 1) {
+      if (_isTransitTarget && !await _ensureBatchSamePaicha(baseUrl)) {
+        if (!mounted) return;
+        setState(() => _isSubmitting = false);
+        _feedbackService.trigger(FeedbackEvent.submitFailure);
+        _showStatusOverride(
+          batchPaichaMismatchMessage,
+          StatusDotColor.red,
+          const Duration(seconds: 2),
+        );
+        return;
+      }
       await _submitBatch(baseUrl);
     } else {
       await _submitOne(baseUrl, _zongpaiNos.first);
     }
   }
 
+  Future<bool> _ensureBatchSamePaicha(String baseUrl) async {
+    final paichaByCode = <String, String>{};
+    final cachedOverview = _overview;
+    if (cachedOverview?.success == true && cachedOverview!.paichaNo != null) {
+      for (final item in cachedOverview.items) {
+        paichaByCode[item.zongpaiNo] = cachedOverview.paichaNo!;
+      }
+    }
+
+    for (final zongpaiNo in _zongpaiNos) {
+      if (paichaByCode.containsKey(zongpaiNo)) continue;
+      final result = await _apiService.fetchPaichaOverview(
+        baseUrl: baseUrl,
+        zongpaiNo: zongpaiNo,
+      );
+      if (!result.success || result.paichaNo == null) {
+        return false;
+      }
+      for (final item in result.items) {
+        paichaByCode[item.zongpaiNo] = result.paichaNo!;
+      }
+    }
+
+    return allSamePaicha(_zongpaiNos.map((code) => paichaByCode[code]));
+  }
+
   Future<void> _submitOne(String baseUrl, String zongpaiNo) async {
     final result = await _apiService.registerLocation(
       baseUrl: baseUrl,
@@ -258,6 +320,16 @@ class _RegistrationPageState extends State<RegistrationPage> {
 
     if (result.success) {
       _feedbackService.trigger(FeedbackEvent.submitSuccess);
+      if (_isTransitTarget) {
+        setState(() => _isSubmitting = false);
+        await _navigateToBoxing(
+          mode: BoxingMode.singleCode,
+          codes: [zongpaiNo],
+          codesToClear: [zongpaiNo],
+          clearLocation: !_isLocked,
+        );
+        return;
+      }
       setState(() {
         _zongpaiNos.remove(zongpaiNo);
         if (!_isLocked) {
@@ -302,6 +374,7 @@ class _RegistrationPageState extends State<RegistrationPage> {
     int offShelfCount = 0;
     final failed = <String>[];
     final toRemove = <String>[];
+    final transitCodes = <String>[];
 
     for (final zongpaiNo in List.of(_zongpaiNos)) {
       final result = await _apiService.registerLocation(
@@ -315,9 +388,26 @@ class _RegistrationPageState extends State<RegistrationPage> {
           offShelfCount++;
         }
         toRemove.add(zongpaiNo);
+        if (_isTransitTarget) {
+          transitCodes.add(zongpaiNo);
+        }
       } else {
         failed.add(zongpaiNo);
         if (result.isDuplicate) {
+          if (_isTransitTarget && transitCodes.isNotEmpty) {
+            setState(() {
+              _zongpaiNos.removeWhere((item) => toRemove.contains(item));
+              _isSubmitting = false;
+            });
+            await _navigateToBoxing(
+              mode: BoxingMode.multiCode,
+              codes: transitCodes,
+              codesToClear: toRemove,
+              clearLocation: false,
+              returnMessage: '成功 $successCount 条，失败 ${failed.length} 条',
+            );
+            return;
+          }
           setState(() {
             _zongpaiNos.removeWhere((item) => toRemove.contains(item));
             _isSubmitting = false;
@@ -327,6 +417,20 @@ class _RegistrationPageState extends State<RegistrationPage> {
           return;
         }
         if (result.isAlreadyOffShelf) {
+          if (_isTransitTarget && transitCodes.isNotEmpty) {
+            setState(() {
+              _zongpaiNos.removeWhere((item) => toRemove.contains(item));
+              _isSubmitting = false;
+            });
+            await _navigateToBoxing(
+              mode: BoxingMode.multiCode,
+              codes: transitCodes,
+              codesToClear: toRemove,
+              clearLocation: false,
+              returnMessage: '成功 $successCount 条，失败 ${failed.length} 条',
+            );
+            return;
+          }
           setState(() {
             _zongpaiNos.removeWhere((item) => toRemove.contains(item));
             _isSubmitting = false;
@@ -349,6 +453,19 @@ class _RegistrationPageState extends State<RegistrationPage> {
       _isSubmitting = false;
     });
 
+    if (_isTransitTarget && transitCodes.isNotEmpty) {
+      await _navigateToBoxing(
+        mode: BoxingMode.multiCode,
+        codes: transitCodes,
+        codesToClear: toRemove,
+        clearLocation: failed.isEmpty,
+        returnMessage: failed.isEmpty
+            ? null
+            : '成功 $successCount 条，失败 ${failed.length} 条',
+      );
+      return;
+    }
+
     if (failed.isEmpty) {
       _feedbackService.trigger(FeedbackEvent.submitSuccess);
       final msg = offShelfCount == successCount
@@ -370,6 +487,49 @@ class _RegistrationPageState extends State<RegistrationPage> {
     }
   }
 
+  Future<void> _navigateToBoxing({
+    required BoxingMode mode,
+    required List<String> codes,
+    required List<String> codesToClear,
+    required bool clearLocation,
+    String? returnMessage,
+  }) async {
+    await _refreshCurrentOverview();
+    if (!mounted) return;
+    final navigator = Navigator.of(context);
+    await _stopScanListening();
+    await navigator.push(
+      MaterialPageRoute(
+        builder: (_) => BoxingPage(
+          arguments: BoxingPageArguments(
+            initialMode: mode,
+            autoScanCodes: codes,
+          ),
+        ),
+      ),
+    );
+    if (!mounted) return;
+    await Future<void>.delayed(const Duration(milliseconds: 120));
+    if (!mounted) return;
+    _restartScanListening();
+    setState(() {
+      _zongpaiNos.removeWhere((item) => codesToClear.contains(item));
+      if (clearLocation) {
+        _locationCode = null;
+        _locationType = null;
+      }
+    });
+    await _refreshCurrentOverview();
+    if (!mounted) return;
+    if (returnMessage != null) {
+      _showStatusOverride(
+        returnMessage,
+        StatusDotColor.red,
+        const Duration(seconds: 2),
+      );
+    }
+  }
+
   void _showDuplicateDialog(String zongpaiNo, Map<String, dynamic>? info) {
     showDialog(
       context: context,
@@ -498,9 +658,11 @@ class _RegistrationPageState extends State<RegistrationPage> {
                     child: ElevatedButton(
                       onPressed: _canSubmit ? _submit : null,
                       style: ElevatedButton.styleFrom(
-                        backgroundColor: _canSubmit
-                            ? colorScheme.primary
-                            : Colors.grey.shade300,
+                        backgroundColor: registrationSubmitColor(
+                          canSubmit: _canSubmit,
+                          isTransitTarget: _isTransitTarget,
+                          primaryColor: colorScheme.primary,
+                        ),
                         foregroundColor: _canSubmit
                             ? Colors.white
                             : Colors.grey.shade600,
@@ -518,9 +680,11 @@ class _RegistrationPageState extends State<RegistrationPage> {
                               ),
                             )
                           : Text(
-                              _isLocked && _zongpaiNos.length > 1
-                                  ? '批量上架（${_zongpaiNos.length} 条）'
-                                  : '确 认 上 架',
+                              registrationSubmitLabel(
+                                isTransitTarget: _isTransitTarget,
+                                isLocked: _isLocked,
+                                zongpaiCount: _zongpaiNos.length,
+                              ),
                               style: const TextStyle(fontSize: 17),
                             ),
                     ),