feat(android): add FJ- attachment code type to CodeParser

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

lib/pages/registration/parts/registration_scan_part.dart

@@ -45,6 +45,7 @@ extension _RegistrationScanPart on _RegistrationPageState {
     final parsed = CodeParser.parse(result.barcode);
     switch (parsed.type) {
       case CodeType.zongpaiNo:
+      case CodeType.attachmentCode:
         _handleZongpaiScan(parsed.value);
       case CodeType.locationNormal:
       case CodeType.locationTransit:

lib/services/code_parser.dart

@@ -3,6 +3,9 @@ class CodeParser {
   static final _zongpaiRegex = RegExp(r'^\d{2}(B|C|T)\d+$|^\d{2}(BW|CW)\d{4}$');
   static final _locationRegex = RegExp(r'^[A-Z0-9]+-[A-Z0-9]+-[A-Z0-9]+$');
   static final _transitRegex = RegExp(r'^TRANS-');
+  static final _attachmentRegex = RegExp(
+    r'^FJ-(\d{2}(B|C|T)\d+|\d{2}(BW|CW)\d{4})$',
+  );
 
   static ParseResult parse(String code) {
     final trimmed = code.trim();
@@ -10,6 +13,10 @@ class CodeParser {
       return ParseResult(type: CodeType.invalid, value: code);
     }
     final normalized = trimmed.toUpperCase();
+    if (_attachmentRegex.hasMatch(normalized)) {
+      final zongpai = normalized.substring(3); // strip "FJ-"
+      return ParseResult(type: CodeType.attachmentCode, value: zongpai);
+    }
     if (_transitRegex.hasMatch(normalized)) {
       return ParseResult(type: CodeType.locationTransit, value: normalized);
     }
@@ -36,6 +43,7 @@ class CodeParser {
 
 enum CodeType {
   zongpaiNo,
+  attachmentCode,
   locationNormal,
   locationTransit,
   locationTempStorage,

test/services/code_parser_test.dart

@@ -62,4 +62,50 @@ void main() {
       expect(CodeParser.isLocation(CodeType.invalid), false);
     });
   });
+
+  group('CodeParser.parse attachmentCode (FJ-)', () {
+    test('identifies FJ- with zongpai B type', () {
+      final result = CodeParser.parse('FJ-26B1');
+      expect(result.type, CodeType.attachmentCode);
+      expect(result.value, '26B1');
+    });
+    test('identifies FJ- with zongpai C type', () {
+      final result = CodeParser.parse('FJ-26C12');
+      expect(result.type, CodeType.attachmentCode);
+      expect(result.value, '26C12');
+    });
+    test('identifies FJ- with zongpai T type', () {
+      final result = CodeParser.parse('FJ-26T3');
+      expect(result.type, CodeType.attachmentCode);
+      expect(result.value, '26T3');
+    });
+    test('identifies FJ- with zongpai BW 4-digit', () {
+      final result = CodeParser.parse('FJ-26BW0001');
+      expect(result.type, CodeType.attachmentCode);
+      expect(result.value, '26BW0001');
+    });
+    test('identifies FJ- with zongpai CW 4-digit', () {
+      final result = CodeParser.parse('FJ-26CW0015');
+      expect(result.type, CodeType.attachmentCode);
+      expect(result.value, '26CW0015');
+    });
+    test('normalizes lowercase fj- to uppercase', () {
+      final result = CodeParser.parse('fj-26b1');
+      expect(result.type, CodeType.attachmentCode);
+      expect(result.value, '26B1');
+    });
+    test('rejects FJ without hyphen', () {
+      expect(CodeParser.parse('FJ26B1').type, CodeType.invalid);
+    });
+    test('rejects FJ- with invalid zongpai', () {
+      expect(CodeParser.parse('FJ-HELLO').type, CodeType.invalid);
+    });
+    test('rejects FJ- with BW short serial', () {
+      expect(CodeParser.parse('FJ-26BW01').type, CodeType.invalid);
+    });
+    test('attaches original raw code with FJ- prefix for display', () {
+      final result = CodeParser.parse('FJ-26B42360');
+      expect(result.value, '26B42360');
+    });
+  });
 }