add

frontend/asset_assistant/lib/pages/country_add_page.dart

@@ -0,0 +1,209 @@
+import 'package:asset_assistant/utils/host_utils.dart';
+import 'package:flutter/material.dart';
+import 'package:dio/dio.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class AddCountryPage extends StatefulWidget {
+  const AddCountryPage({super.key});
+
+  @override
+  State<AddCountryPage> createState() => _AddCountryPageState();
+}
+
+class _AddCountryPageState extends State<AddCountryPage> {
+  // 输入控制器
+  final TextEditingController _nameController = TextEditingController();
+  final TextEditingController _codeController = TextEditingController();
+
+  // 加载状态
+  bool _isLoading = false;
+
+  // 表单验证键
+  final _formKey = GlobalKey<FormState>();
+
+  // 创建国家
+  Future<void> _createCountry() async {
+    if (!_formKey.currentState!.validate()) {
+      return;
+    }
+
+    setState(() {
+      _isLoading = true;
+    });
+
+    try {
+      // 获取用户ID
+      final prefs = await SharedPreferences.getInstance();
+      final userId = prefs.getString('user_id');
+      if (userId == null) {
+        if (mounted) {
+          _showDialog('错误', '请先登录');
+          Navigator.pushReplacementNamed(context, '/login');
+        }
+        return;
+      }
+
+      // 准备请求数据
+      final baseUrl = HostUtils().currentHost;
+      const path = '/country/create';
+      final url = '$baseUrl$path';
+
+      final requestData = {
+        'name': _nameController.text.trim(),
+        'code': _codeController.text.trim(),
+      };
+
+      // 发送请求
+      final dio = Dio();
+      final response = await dio.post(
+        url,
+        data: requestData,
+        options: Options(headers: {'Content-Type': 'application/json'}),
+      );
+
+      // 处理响应
+      if (response.statusCode == 200) {
+        final result = response.data;
+        if (result['success'] == true) {
+          if (mounted) {
+            _showDialog('成功', '国家创建成功', () {
+              Navigator.pop(context, true); // 返回并通知上一页刷新
+            });
+          }
+        } else {
+          if (mounted) {
+            _showDialog('失败', result['message'] ?? '创建失败，请重试');
+          }
+        }
+      } else {
+        if (mounted) {
+          _showDialog('错误', '服务器响应异常: ${response.statusCode}');
+        }
+      }
+    } on DioException catch (e) {
+      String errorMessage = '网络请求失败';
+      if (e.response != null) {
+        errorMessage = '请求失败: ${e.response?.statusCode}';
+      } else if (e.type == DioExceptionType.connectionTimeout) {
+        errorMessage = '连接超时，请检查网络';
+      } else if (e.type == DioExceptionType.connectionError) {
+        errorMessage = '网络连接错误';
+      }
+
+      if (mounted) {
+        _showDialog('错误', errorMessage);
+      }
+    } catch (e) {
+      if (mounted) {
+        _showDialog('错误', '发生未知错误: $e');
+      }
+    } finally {
+      if (mounted) {
+        setState(() {
+          _isLoading = false;
+        });
+      }
+    }
+  }
+
+  // 显示对话框
+  void _showDialog(String title, String content, [VoidCallback? onConfirm]) {
+    showDialog(
+      context: context,
+      builder: (context) => AlertDialog(
+        title: Text(title),
+        content: Text(content),
+        actions: [
+          TextButton(
+            onPressed: () {
+              Navigator.pop(context);
+              onConfirm?.call();
+            },
+            child: const Text('确定'),
+          ),
+        ],
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    return Scaffold(
+      appBar: AppBar(
+        title: const Text('新增国家'),
+        centerTitle: true,
+        elevation: 4,
+        shadowColor: Colors.black12,
+        backgroundColor: theme.colorScheme.surfaceContainerHighest,
+        leading: IconButton(
+          icon: const Icon(Icons.arrow_back),
+          onPressed: () {
+            Navigator.of(context).pop();
+          },
+        ),
+        actions: [
+          IconButton(
+            icon: const Icon(Icons.save),
+            onPressed: _isLoading ? null : _createCountry,
+          ),
+        ],
+      ),
+      body: SafeArea(
+        child: Container(
+          color: theme.colorScheme.surface,
+          width: double.infinity,
+          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 16),
+          child: Form(
+            key: _formKey,
+            child: Column(
+              children: [
+                // 国家名称输入框
+                TextFormField(
+                  controller: _nameController,
+                  style: TextStyle(color: theme.colorScheme.onSurface),
+                  decoration: InputDecoration(
+                    labelText: '国家名称',
+                    hintText: '请输入国家名称',
+                    prefixIcon: Icon(
+                      Icons.account_balance,
+                      color: theme.colorScheme.secondary,
+                    ),
+                  ),
+                  validator: (value) {
+                    if (value == null || value.trim().isEmpty) {
+                      return '请输入国家名称';
+                    }
+                    return null;
+                  },
+                ),
+                const SizedBox(height: 24),
+
+                // 国家代码输入框
+                TextFormField(
+                  controller: _codeController,
+                  style: TextStyle(color: theme.colorScheme.onSurface),
+                  decoration: InputDecoration(
+                    labelText: '国家代码',
+                    hintText: '请输入国家代码',
+                    prefixIcon: Icon(
+                      Icons.code,
+                      color: theme.colorScheme.secondary,
+                    ),
+                  ),
+                  validator: (value) {
+                    if (value == null || value.trim().isEmpty) {
+                      return '请输入国家代码';
+                    }
+                    return null;
+                  },
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}