✨ Edit alert configuration

lib/controllers/alert.dart

@@ -0,0 +1,38 @@
+import 'dart:convert';
+
+import 'package:dietary_guard/models/alert_configuration.dart';
+import 'package:get/get.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class AlertController extends GetxController {
+  List<AlertConfiguration> configuration = List.empty();
+
+  late final SharedPreferences _prefs;
+
+  @override
+  void onInit() async {
+    _prefs = await SharedPreferences.getInstance();
+    loadAlertConfiguration();
+    super.onInit();
+  }
+
+  void loadAlertConfiguration() {
+    final raw = _prefs.getString("alert_configuration");
+    if (raw == null) return;
+    configuration = List<AlertConfiguration>.from(jsonDecode(raw).map(
+      (x) => AlertConfiguration.fromJson(x),
+    ));
+  }
+
+  Future<void> setAlertConfiguration(List<AlertConfiguration> value) async {
+    await _prefs.setString(
+      "alert_configuration",
+      jsonEncode(value.map((x) => x.toJson()).toList()),
+    );
+    loadAlertConfiguration();
+  }
+
+  void clearAlertConfiguration() {
+    _prefs.remove("alert_configuration");
+  }
+}

lib/main.dart

@@ -1,3 +1,4 @@
+import 'package:dietary_guard/controllers/alert.dart';
 import 'package:dietary_guard/controllers/food_data.dart';
 import 'package:dietary_guard/screens/query.dart';
 import 'package:dietary_guard/screens/settings.dart';
@@ -62,6 +63,7 @@ class MyApp extends StatelessWidget {
   }
 
   void _initializeProviders(BuildContext context) async {
-    Get.put(FoodDataController());
+    Get.lazyPut(() => FoodDataController());
+    Get.lazyPut(() => AlertController());
   }
 }

lib/models/alert_configuration.dart

@@ -0,0 +1,24 @@
+class AlertConfiguration {
+  int nutrientId;
+  double maxValue;
+  double minValue;
+
+  AlertConfiguration({
+    required this.nutrientId,
+    required this.maxValue,
+    required this.minValue,
+  });
+
+  Map<String, dynamic> toJson() => {
+        'nutrient_id': nutrientId,
+        'min_value': minValue,
+        'max_value': maxValue,
+      };
+
+  factory AlertConfiguration.fromJson(Map<String, dynamic> json) =>
+      AlertConfiguration(
+        nutrientId: json['nutrient_id'],
+        minValue: json['min_value'],
+        maxValue: json['max_value'],
+      );
+}

lib/models/food_data.dart

@@ -98,7 +98,7 @@ class Nutrients {
 }
 
 class FoodSearchCriteria {
-  List<Type> dataType;
+  List<Type?> dataType;
   String query;
   String generalSearchInput;
   int pageNumber;
@@ -107,7 +107,7 @@ class FoodSearchCriteria {
   int numberOfResultsPerPage;
   int pageSize;
   bool requireAllWords;
-  List<Type> foodTypes;
+  List<Type?> foodTypes;
 
   FoodSearchCriteria({
     required this.dataType,
@@ -124,8 +124,8 @@ class FoodSearchCriteria {
 
   factory FoodSearchCriteria.fromJson(Map<String, dynamic> json) =>
       FoodSearchCriteria(
-        dataType:
-            List<Type>.from(json["dataType"].map((x) => typeValues.map[x]!)),
+        dataType: List<Type>.from(
+            json["dataType"]?.map((x) => typeValues.map[x]) ?? List.empty()),
         query: json["query"],
         generalSearchInput: json["generalSearchInput"],
         pageNumber: json["pageNumber"],
@@ -134,8 +134,8 @@ class FoodSearchCriteria {
         numberOfResultsPerPage: json["numberOfResultsPerPage"],
         pageSize: json["pageSize"],
         requireAllWords: json["requireAllWords"],
-        foodTypes:
-            List<Type>.from(json["foodTypes"].map((x) => typeValues.map[x]!)),
+        foodTypes: List<Type>.from(
+            json["foodTypes"]?.map((x) => typeValues.map[x]) ?? List.empty()),
       );
 
   Map<String, dynamic> toJson() => {
@@ -162,10 +162,10 @@ final typeValues =
 class FoodData {
   int fdcId;
   String description;
-  String commonNames;
-  String additionalDescriptions;
-  Type dataType;
-  int ndbNumber;
+  String? commonNames;
+  String? additionalDescriptions;
+  Type? dataType;
+  int? ndbNumber;
   DateTime publishedDate;
   FoodCategory? foodCategory;
   DateTime? mostRecentAcquisitionDate;
@@ -205,7 +205,7 @@ class FoodData {
         description: json["description"],
         commonNames: json["commonNames"],
         additionalDescriptions: json["additionalDescriptions"],
-        dataType: typeValues.map[json["dataType"]]!,
+        dataType: typeValues.map[json["dataType"]],
         ndbNumber: json["ndbNumber"],
         publishedDate: DateTime.parse(json["publishedDate"]),
         foodCategory: foodCategoryValues.map[json["foodCategory"]],
@@ -264,7 +264,7 @@ class FoodNutrient {
   int nutrientId;
   String nutrientName;
   String nutrientNumber;
-  UnitName unitName;
+  UnitName? unitName;
   DerivationCode? derivationCode;
   String? derivationDescription;
   int? derivationId;
@@ -305,15 +305,15 @@ class FoodNutrient {
         nutrientId: json["nutrientId"],
         nutrientName: json["nutrientName"],
         nutrientNumber: json["nutrientNumber"],
-        unitName: unitNameValues.map[json["unitName"]]!,
-        derivationCode: derivationCodeValues.map[json["derivationCode"]]!,
+        unitName: unitNameValues.map[json["unitName"]],
+        derivationCode: derivationCodeValues.map[json["derivationCode"]],
         derivationDescription: json["derivationDescription"],
         derivationId: json["derivationId"],
         value: json["value"]?.toDouble(),
         foodNutrientSourceId: json["foodNutrientSourceId"],
         foodNutrientSourceCode: json["foodNutrientSourceCode"],
         foodNutrientSourceDescription: foodNutrientSourceDescriptionValues
-            .map[json["foodNutrientSourceDescription"]]!,
+            .map[json["foodNutrientSourceDescription"]],
         rank: json["rank"],
         indentLevel: json["indentLevel"],
         foodNutrientId: json["foodNutrientId"],

lib/screens/food/details.dart

@@ -9,37 +9,40 @@ class FoodDetailsScreen extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
-        title: Text(item.description),
+    return Material(
+      color: Theme.of(context).colorScheme.surface,
+      child: Scaffold(
+        appBar: AppBar(
+          title: Text(item.description),
+        ),
+        body: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            Text('nutrients'.tr).paddingOnly(left: 24, right: 24, bottom: 8),
+            Expanded(
+              child: ListView.builder(
+                itemCount: item.foodNutrients.length,
+                itemBuilder: (context, idx) {
+                  final entry = item.foodNutrients[idx];
+                  final unitName = unitNameValues.reverse[entry.unitName];
+                  return ListTile(
+                    contentPadding: const EdgeInsets.symmetric(horizontal: 24),
+                    title: Row(
+                      crossAxisAlignment: CrossAxisAlignment.center,
+                      children: [
+                        Text(entry.nutrientName),
+                        const SizedBox(width: 6),
+                        Badge(label: Text('#${entry.nutrientId}'))
+                      ],
+                    ),
+                    subtitle: Text('${entry.nutrientNumber} ${unitName}'),
+                  );
+                },
+              ),
+            )
+          ],
+        ).paddingSymmetric(vertical: 24),
       ),
-      body: Column(
-        crossAxisAlignment: CrossAxisAlignment.start,
-        children: [
-          Text('nutrients'.tr).paddingOnly(left: 24, right: 24, bottom: 8),
-          Expanded(
-            child: ListView.builder(
-              itemCount: item.foodNutrients.length,
-              itemBuilder: (context, idx) {
-                final entry = item.foodNutrients[idx];
-                final unitName = unitNameValues.reverse[entry.unitName];
-                return ListTile(
-                  contentPadding: const EdgeInsets.symmetric(horizontal: 24),
-                  title: Row(
-                    crossAxisAlignment: CrossAxisAlignment.center,
-                    children: [
-                      Text(entry.nutrientName),
-                      const SizedBox(width: 6),
-                      Badge(label: Text('#${entry.nutrientId}'))
-                    ],
-                  ),
-                  subtitle: Text('${entry.nutrientNumber} ${unitName}'),
-                );
-              },
-            ),
-          )
-        ],
-      ).paddingSymmetric(vertical: 24),
     );
   }
 }

lib/screens/query.dart

@@ -45,50 +45,53 @@ class _QueryScreenState extends State<QueryScreen> {
 
   @override
   Widget build(BuildContext context) {
-    return SafeArea(
-      child: Column(
-        children: [
-          SearchBar(
-            padding: const WidgetStatePropertyAll<EdgeInsets>(
-              EdgeInsets.symmetric(horizontal: 16.0),
-            ),
-            onSubmitted: (value) {
-              _searchFood(value);
-            },
-            leading: const Icon(Icons.search),
-          ).paddingSymmetric(horizontal: 24),
-          if (_isLoading)
-            const SizedBox(
-              width: 28,
-              height: 28,
-              child: CircularProgressIndicator(strokeWidth: 3),
-            ).paddingSymmetric(vertical: 24)
-          else
-            Expanded(
-              child: ListView.builder(
-                itemCount: _foodData.length,
-                itemBuilder: (context, index) {
-                  final item = _foodData[index];
-                  return OpenContainer(
-                    closedBuilder: (_, open) => ListTile(
-                      contentPadding:
-                          const EdgeInsets.symmetric(horizontal: 24),
-                      title: Text(item.description),
-                      subtitle: Text(
-                        DateFormat("yyyy-MM-dd").format(item.publishedDate),
+    return Material(
+      color: Theme.of(context).colorScheme.surface,
+      child: SafeArea(
+        child: Column(
+          children: [
+            SearchBar(
+              padding: const WidgetStatePropertyAll<EdgeInsets>(
+                EdgeInsets.symmetric(horizontal: 16.0),
+              ),
+              onSubmitted: (value) {
+                _searchFood(value);
+              },
+              leading: const Icon(Icons.search),
+            ).paddingSymmetric(horizontal: 24),
+            if (_isLoading)
+              const SizedBox(
+                width: 28,
+                height: 28,
+                child: CircularProgressIndicator(strokeWidth: 3),
+              ).paddingSymmetric(vertical: 24)
+            else
+              Expanded(
+                child: ListView.builder(
+                  itemCount: _foodData.length,
+                  itemBuilder: (context, index) {
+                    final item = _foodData[index];
+                    return OpenContainer(
+                      closedBuilder: (_, open) => ListTile(
+                        contentPadding:
+                            const EdgeInsets.symmetric(horizontal: 24),
+                        title: Text(item.description),
+                        subtitle: Text(
+                          DateFormat("yyyy-MM-dd").format(item.publishedDate),
+                        ),
+                        onTap: () => open(),
                       ),
-                      onTap: () => open(),
-                    ),
-                    openBuilder: (_, __) => FoodDetailsScreen(item: item),
-                    openElevation: 0,
-                    closedElevation: 0,
-                    closedColor: Colors.transparent,
-                    openColor: Colors.transparent,
-                  );
-                },
-              ).paddingOnly(top: 8),
-            ),
-        ],
+                      openBuilder: (_, __) => FoodDetailsScreen(item: item),
+                      openElevation: 0,
+                      closedElevation: 0,
+                      closedColor: Theme.of(context).colorScheme.surface,
+                      openColor: Colors.transparent,
+                    );
+                  },
+                ).paddingOnly(top: 8),
+              ),
+          ],
+        ),
       ),
     );
   }

lib/screens/settings.dart

@@ -1,4 +1,6 @@
+import 'package:dietary_guard/controllers/alert.dart';
 import 'package:dietary_guard/controllers/food_data.dart';
+import 'package:dietary_guard/models/alert_configuration.dart';
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
 
@@ -12,10 +14,25 @@ class SettingsScreen extends StatefulWidget {
 class _SettingsScreenState extends State<SettingsScreen> {
   final TextEditingController _fdcApiKeyController = TextEditingController();
 
+  List<AlertConfiguration> _currentAlerts = List.empty(growable: true);
+
+  void _addAlert() {
+    setState(() {
+      _currentAlerts.add(AlertConfiguration(
+        nutrientId: 0,
+        maxValue: 0,
+        minValue: 0,
+      ));
+    });
+  }
+
   Future<void> _applySettings() async {
     final FoodDataController data = Get.find();
     await data.setApiKey(_fdcApiKeyController.text);
 
+    final AlertController alert = Get.find();
+    await alert.setAlertConfiguration(_currentAlerts);
+
     ScaffoldMessenger.of(context).showSnackBar(SnackBar(
       content: Text('settingsApplied'.tr),
     ));
@@ -26,6 +43,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
     final FoodDataController data = Get.find();
     _fdcApiKeyController.text = data.getApiKey() ?? '';
 
+    final AlertController alert = Get.find();
+    _currentAlerts = List.from(alert.configuration, growable: true);
+
     super.initState();
   }
 
@@ -35,36 +55,116 @@ class _SettingsScreenState extends State<SettingsScreen> {
     super.dispose();
   }
 
+  Widget _buildSectionHeader(String title) {
+    return Container(
+      color: Theme.of(context).colorScheme.secondaryContainer,
+      padding: const EdgeInsets.symmetric(horizontal: 28, vertical: 8),
+      child: Text(
+        title,
+        style: Theme.of(context).textTheme.bodyLarge,
+      ),
+    ).marginOnly(bottom: 16);
+  }
+
   @override
   Widget build(BuildContext context) {
-    return Scaffold(
-      appBar: AppBar(
-        title: Text('settings'.tr),
-      ),
-      body: ListView(
-        children: [
-          const SizedBox(height: 8),
-          TextField(
-            controller: _fdcApiKeyController,
-            obscureText: true,
-            decoration: const InputDecoration(
-              border: OutlineInputBorder(),
-              label: Text("FDC API Key"),
-              isDense: true,
-            ),
-          ),
-          Row(
-            mainAxisAlignment: MainAxisAlignment.end,
-            children: [
-              ElevatedButton.icon(
-                icon: const Icon(Icons.save, size: 16),
-                label: Text('apply'.tr),
-                onPressed: () => _applySettings(),
+    return Material(
+      color: Theme.of(context).colorScheme.surface,
+      child: Scaffold(
+        appBar: AppBar(
+          title: Text('settings'.tr),
+        ),
+        body: ListView(
+          children: [
+            _buildSectionHeader('settingsAlertSection'.tr),
+            Column(
+              children: [
+                ...(_currentAlerts.map((x) => Row(
+                      children: [
+                        Expanded(
+                          child: TextFormField(
+                            initialValue: x.nutrientId.toString(),
+                            decoration: InputDecoration(
+                              border: const OutlineInputBorder(),
+                              label: Text("alertNutrientId".tr),
+                              isDense: true,
+                            ),
+                            onTapOutside: (_) =>
+                                FocusManager.instance.primaryFocus?.unfocus(),
+                            onChanged: (value) {
+                              x.nutrientId = int.tryParse(value) ?? 0;
+                            },
+                          ),
+                        ),
+                        const SizedBox(width: 6),
+                        Expanded(
+                          child: TextFormField(
+                            initialValue: x.maxValue.toString(),
+                            decoration: InputDecoration(
+                              border: const OutlineInputBorder(),
+                              label: Text("alertMaxValue".tr),
+                              isDense: true,
+                            ),
+                            onTapOutside: (_) =>
+                                FocusManager.instance.primaryFocus?.unfocus(),
+                            onChanged: (value) {
+                              x.maxValue = double.tryParse(value) ?? 0;
+                            },
+                          ),
+                        ),
+                        const SizedBox(width: 6),
+                        Expanded(
+                          child: TextFormField(
+                            initialValue: x.minValue.toString(),
+                            decoration: InputDecoration(
+                              border: const OutlineInputBorder(),
+                              label: Text("alertMinValue".tr),
+                              isDense: true,
+                            ),
+                            onTapOutside: (_) =>
+                                FocusManager.instance.primaryFocus?.unfocus(),
+                            onChanged: (value) {
+                              x.minValue = double.tryParse(value) ?? 0;
+                            },
+                          ),
+                        ),
+                      ],
+                    ))),
+                Row(
+                  mainAxisAlignment: MainAxisAlignment.center,
+                  children: [
+                    TextButton.icon(
+                      label: Text('newAlert'.tr),
+                      onPressed: () => _addAlert(),
+                    ),
+                  ],
+                ).paddingSymmetric(vertical: 12, horizontal: 24),
+              ],
+            ).paddingSymmetric(horizontal: 24),
+            _buildSectionHeader('settingsDataSection'.tr),
+            TextField(
+              controller: _fdcApiKeyController,
+              obscureText: true,
+              decoration: const InputDecoration(
+                border: UnderlineInputBorder(),
+                label: Text("FDC API Key"),
+                isDense: false,
               ),
-            ],
-          ).paddingSymmetric(vertical: 12),
-        ],
-      ).paddingSymmetric(horizontal: 24),
+              onTapOutside: (_) =>
+                  FocusManager.instance.primaryFocus?.unfocus(),
+            ).paddingSymmetric(horizontal: 24),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                TextButton.icon(
+                  label: Text('apply'.tr),
+                  onPressed: () => _applySettings(),
+                ),
+              ],
+            ).paddingSymmetric(vertical: 12, horizontal: 24),
+          ],
+        ),
+      ),
     );
   }
 }

lib/translations/en_us.dart

@@ -3,7 +3,13 @@ const i18nEnglish = {
   'settings': 'Settings',
   'preparingData': 'Preparing data...',
   'settingsApplied': 'Settings Applied',
+  'settingsDataSection': 'Data Source',
+  'settingsAlertSection': 'Alert',
+  'newAlert': 'New Alert',
   'apply': 'Apply',
   'searchHistoryNotIncluded': 'Search History not Included, yet',
   'nutrients': 'Nutrients',
+  'alertNutrientId': 'Nutrient ID',
+  'alertMaxValue': 'Max',
+  'alertMinValue': 'Min',
 };

lib/translations/zh_cn.dart

@@ -3,7 +3,13 @@ const i18nSimplifiedChinese = {
   'settings': '设置',
   'preparingData': '准备数据中…',
   'settingsApplied': '设置已应用',
+  'settingsDataSection': '数据源',
+  'settingsAlertSection': '危险告警',
+  'newAlert': '新告警',
   'apply': '应用',
   'searchHistoryNotIncluded': '搜索记录还没实现',
   'nutrients': '营养物质',
+  'alertNutrientId': '营养物质编号',
+  'alertMaxValue': '告警上限',
+  'alertMinValue': '告警下限',
 };