edit meals: make base quantity customizable

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -46,3 +46,7 @@ app.*.map.json
 /android/app/debug
 /android/app/profile
 /android/app/release
+
+# nix related
+result
+.direnv/

flake.nix

@@ -0,0 +1,47 @@
+{
+  description = "Flutter 3.19.x";
+  inputs = {
+    nixpkgs.url = "nixpkgs";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          config = {
+            android_sdk.accept_license = true;
+            allowUnfree = true;
+          };
+        };
+        androidPkgs = (pkgs.androidenv.composeAndroidPackages {
+          platformVersions = [ "27" "29" "31" "33" "34" ];
+          buildToolsVersions = [ "30.0.3" ];
+          includeEmulator = true;
+          includeSystemImages = true;
+        });
+        # TODO: graphics are a bit weird
+        emulator = pkgs.androidenv.emulateApp {
+          name = "flutter_emu";
+          platformVersion = "27";
+          abiVersion = "x86"; # armeabi-v7a, mips, x86_64
+          systemImageType = "google_apis_playstore";
+          deviceName = "pixel";
+        };
+      in
+      {
+        # run once:
+        #   avdmanager create avd -n flutter_emulator -k 'system-images;android-27;google_apis_playstore;x86' -d pixel
+        #   flutter emulators --launch flutter_emulator
+        #   flutter pub run build_runner build --delete-conflicting-outputs
+        devShells.default = pkgs.mkShell {
+            ANDROID_SDK_ROOT = "${androidPkgs.androidsdk}/libexec/android-sdk";
+            buildInputs = [
+              pkgs.flutter319
+              pkgs.jdk17
+              androidPkgs.androidsdk
+              emulator  # execute emulator with: run-test-emulator
+            ];
+          };
+      });
+}

lib/features/edit_meal/presentation/bloc/edit_meal_bloc.dart

@@ -9,19 +9,29 @@ class EditMealBloc {
       String brandsText,
       String mealQuantityText,
       String servingQuantityText,
+      String baseQuantity,
       String? unitText,
       String kcalText,
       String carbsText,
       String fatText,
       String proteinText) {
+
+    final baseQuantityDouble = double.tryParse(baseQuantity); 
+
+    final double factorTo100g = baseQuantityDouble != null ? (100/baseQuantityDouble): 1;
+
+    double? multiplyIfNotNull(double? nutritmentValue) {
+      return nutritmentValue != null ? nutritmentValue * factorTo100g: null;
+    }
+
     final newMealNutriments = MealNutrimentsEntity(
-        energyKcal100: kcalText.toDoubleOrNull(),
-        carbohydrates100: carbsText.toDoubleOrNull(),
-        fat100: fatText.toDoubleOrNull(),
-        proteins100: proteinText.toDoubleOrNull(),
-        sugars100: oldMealEntity.nutriments.sugars100,
-        saturatedFat100: oldMealEntity.nutriments.saturatedFat100,
-        fiber100: oldMealEntity.nutriments.fiber100);
+        energyKcal100: multiplyIfNotNull(kcalText.toDoubleOrNull()),
+        carbohydrates100: multiplyIfNotNull(carbsText.toDoubleOrNull()),
+        fat100: multiplyIfNotNull(fatText.toDoubleOrNull()),
+        proteins100: multiplyIfNotNull(proteinText.toDoubleOrNull()),
+        sugars100: multiplyIfNotNull(oldMealEntity.nutriments.sugars100),
+        saturatedFat100: multiplyIfNotNull(oldMealEntity.nutriments.saturatedFat100),
+        fiber100: multiplyIfNotNull(oldMealEntity.nutriments.fiber100));
 
     return MealEntity(
         code: oldMealEntity.code,

lib/features/edit_meal/presentation/edit_meal_screen.dart

@@ -33,19 +33,30 @@ class _EditMealScreenState extends State<EditMealScreen> {
   final _brandsTextController = TextEditingController();
   final _mealQuantityTextController = TextEditingController();
   final _servingQuantityTextController = TextEditingController();
+  final _baseQuantityTextController = TextEditingController();
   final _kcalTextController = TextEditingController();
   final _carbsTextController = TextEditingController();
   final _fatTextController = TextEditingController();
   final _proteinTextController = TextEditingController();
 
-  final _dropdownValues = ['g', 'ml', 'g/ml'];
+  final _units = ['g', 'ml', 'g/ml'];
   late String? _dropdownUnitValue;
   late List<DropdownMenuItem> _mealUnitDropdownItems;
 
+ String baseQuantity = "100";
+ String baseQuantityUnit = " g/ml";
+
+
   @override
   void initState() {
     _editMealBloc = locator<EditMealBloc>();
     super.initState();
+
+    _baseQuantityTextController.addListener(() {
+      setState(() {
+        baseQuantity = _baseQuantityTextController.text;
+      });
+    });
   }
 
   @override
@@ -72,11 +83,11 @@ class _EditMealScreenState extends State<EditMealScreen> {
 
     _mealUnitDropdownItems = <DropdownMenuItem>[
       DropdownMenuItem(
-          value: _dropdownValues[0], child: Text(S.of(context).gramUnit)),
+          value: _units[0], child: Text(S.of(context).gramUnit)),
       DropdownMenuItem(
-          value: _dropdownValues[1], child: Text(S.of(context).milliliterUnit)),
+          value: _units[1], child: Text(S.of(context).milliliterUnit)),
       DropdownMenuItem(
-          value: _dropdownValues[2],
+          value: _units[2],
           child: Text(S.of(context).gramMilliliterUnit)),
     ];
 
@@ -135,7 +146,7 @@ class _EditMealScreenState extends State<EditMealScreen> {
             decoration: InputDecoration(
                 labelText: S.of(context).mealSizeLabel,
                 border: const OutlineInputBorder()),
-            keyboardType: TextInputType.numberWithOptions(decimal: true),
+            keyboardType: const TextInputType.numberWithOptions(decimal: true),
           ),
           const SizedBox(height: 16),
           TextFormField(
@@ -144,11 +155,11 @@ class _EditMealScreenState extends State<EditMealScreen> {
             decoration: InputDecoration(
                 labelText: S.of(context).servingSizeLabel,
                 border: const OutlineInputBorder()),
-            keyboardType: TextInputType.numberWithOptions(decimal: true),
+            keyboardType: const TextInputType.numberWithOptions(decimal: true),
           ),
           const SizedBox(height: 16),
           DropdownButtonFormField(
-            value: _dropdownUnitValue ?? _dropdownValues.first,
+            value: _dropdownUnitValue ?? _units.first,
             items: _mealUnitDropdownItems,
             onChanged: (text) {
               _dropdownUnitValue = _switchDropdownUnit(text);
@@ -158,40 +169,49 @@ class _EditMealScreenState extends State<EditMealScreen> {
                 border: const OutlineInputBorder()),
           ),
           const SizedBox(height: 48),
+          TextFormField(
+            controller: _baseQuantityTextController,
+            inputFormatters: CustomTextInputFormatter.doubleOnly(),
+            decoration: InputDecoration(
+                labelText: S.of(context).baseQuantityLabel,
+                border: const OutlineInputBorder()),
+            keyboardType: TextInputType.number,
+          ),
+          const SizedBox(height: 48),
           TextFormField(
             controller: _kcalTextController,
             inputFormatters: CustomTextInputFormatter.doubleOnly(),
             decoration: InputDecoration(
-                labelText: S.of(context).mealKcalLabel,
+                labelText: S.of(context).mealKcalLabel+baseQuantity+baseQuantityUnit,
                 border: const OutlineInputBorder()),
-            keyboardType: TextInputType.numberWithOptions(decimal: true),
+            keyboardType: const TextInputType.numberWithOptions(decimal: true),
           ),
           const SizedBox(height: 16),
           TextFormField(
             controller: _carbsTextController,
             inputFormatters: CustomTextInputFormatter.doubleOnly(),
             decoration: InputDecoration(
-                labelText: S.of(context).mealCarbsLabel,
+                labelText: S.of(context).mealCarbsLabel+baseQuantity+baseQuantityUnit,
                 border: const OutlineInputBorder()),
-            keyboardType: TextInputType.numberWithOptions(decimal: true),
+            keyboardType: const TextInputType.numberWithOptions(decimal: true),
           ),
           const SizedBox(height: 16),
           TextFormField(
             controller: _fatTextController,
             inputFormatters: CustomTextInputFormatter.doubleOnly(),
             decoration: InputDecoration(
-                labelText: S.of(context).mealFatLabel,
+                labelText: S.of(context).mealFatLabel+baseQuantity+baseQuantityUnit,
                 border: const OutlineInputBorder()),
-            keyboardType: TextInputType.numberWithOptions(decimal: true),
+            keyboardType: const TextInputType.numberWithOptions(decimal: true),
           ),
           const SizedBox(height: 16),
           TextFormField(
             controller: _proteinTextController,
             inputFormatters: CustomTextInputFormatter.doubleOnly(),
             decoration: InputDecoration(
-                labelText: S.of(context).mealProteinLabel,
+                labelText: S.of(context).mealProteinLabel+baseQuantity+baseQuantityUnit,
                 border: const OutlineInputBorder()),
-            keyboardType: TextInputType.numberWithOptions(decimal: true),
+            keyboardType: const TextInputType.numberWithOptions(decimal: true),
           ),
         ],
       ),
@@ -206,6 +226,7 @@ class _EditMealScreenState extends State<EditMealScreen> {
           _brandsTextController.text,
           _mealQuantityTextController.text,
           _servingQuantityTextController.text,
+          _baseQuantityTextController.text,
           _dropdownUnitValue,
           _kcalTextController.text,
           _carbsTextController.text,
@@ -228,8 +249,8 @@ class _EditMealScreenState extends State<EditMealScreen> {
 
   String? _switchDropdownUnit(String? unit) {
     String? dropdownValue;
-    if (!_dropdownValues.contains(unit)) {
-      dropdownValue = _dropdownValues.first;
+    if (!_units.contains(unit)) {
+      dropdownValue = _units.first;
     } else {
       dropdownValue = unit;
     }

lib/generated/intl/messages_de.dart

@@ -102,6 +102,8 @@ class MessageLookup extends MessageLookupByLibrary {
         "dinnerLabel": MessageLookupByLibrary.simpleMessage("Abendessen"),
         "disclaimerText": MessageLookupByLibrary.simpleMessage(
             "OpenNutriTracker ist keine medizinische Anwendung. Alle bereitgestellten Daten sind nicht validiert und sollten mit Vorsicht verwendet werden. Bitte pflegen Sie einen gesunden Lebensstil und konsultieren Sie einen Fachmann, wenn Sie Probleme haben. Die Verwendung während einer Krankheit, Schwangerschaft oder Stillzeit wird nicht empfohlen.\n\n\nDie Anwendung befindet sich noch in der Entwicklung. Fehler, Bugs und Abstürze können auftreten."),
+        "editItemDialogTitle":
+            MessageLookupByLibrary.simpleMessage("Eintrag aktualisieren"),
         "editMealLabel":
             MessageLookupByLibrary.simpleMessage("Mahlzeit bearbeiten"),
         "energyLabel": MessageLookupByLibrary.simpleMessage("Energie"),
@@ -139,6 +141,8 @@ class MessageLookup extends MessageLookupByLibrary {
             MessageLookupByLibrary.simpleMessage("Neue Aufnahme hinzugefügt"),
         "itemDeletedSnackbar":
             MessageLookupByLibrary.simpleMessage("Eintrag gelöscht"),
+        "itemUpdatedSnackbar":
+            MessageLookupByLibrary.simpleMessage("Eintrag aktualisiert"),
         "kcalLabel": MessageLookupByLibrary.simpleMessage("kcal"),
         "kcalLeftLabel": MessageLookupByLibrary.simpleMessage("kcal übrig"),
         "kgLabel": MessageLookupByLibrary.simpleMessage("kg"),

lib/generated/intl/messages_en.dart

@@ -55,6 +55,8 @@ class MessageLookup extends MessageLookupByLibrary {
             MessageLookupByLibrary.simpleMessage("GPL-3.0 license"),
         "appTitle": MessageLookupByLibrary.simpleMessage("OpenNutriTracker"),
         "appVersionName": m0,
+        "baseQuantityLabel":
+            MessageLookupByLibrary.simpleMessage("Base quantity (g/ml)"),
         "betaVersionName": MessageLookupByLibrary.simpleMessage("[Beta]"),
         "bmiInfo": MessageLookupByLibrary.simpleMessage(
             "Body Mass Index (BMI) is a index to classify overweight and obesity in adults. It is defined as weight in kilograms divided by the square of height in meters (kg/m²).\n\nBMI does not differentiate between fat and muscle mass and can be misleading for some individuals."),
@@ -100,6 +102,8 @@ class MessageLookup extends MessageLookupByLibrary {
         "dinnerLabel": MessageLookupByLibrary.simpleMessage("Dinner"),
         "disclaimerText": MessageLookupByLibrary.simpleMessage(
             "OpenNutriTracker is not a medical application. All data provided is not validated and should be used with caution. Please maintain a healthy lifestyle and consult a professional if you have any problems. Use during illness, pregnancy or lactation is not recommended.\n\n\nThe application is still under development. Errors, bugs and crashes may occur."),
+        "editItemDialogTitle":
+            MessageLookupByLibrary.simpleMessage("Edit item"),
         "editMealLabel": MessageLookupByLibrary.simpleMessage("Edit meal"),
         "energyLabel": MessageLookupByLibrary.simpleMessage("energy"),
         "errorFetchingProductData": MessageLookupByLibrary.simpleMessage(
@@ -134,19 +138,18 @@ class MessageLookup extends MessageLookupByLibrary {
             MessageLookupByLibrary.simpleMessage("Added new intake"),
         "itemDeletedSnackbar":
             MessageLookupByLibrary.simpleMessage("Item deleted"),
+        "itemUpdatedSnackbar":
+            MessageLookupByLibrary.simpleMessage("Item updated"),
         "kcalLabel": MessageLookupByLibrary.simpleMessage("kcal"),
         "kcalLeftLabel": MessageLookupByLibrary.simpleMessage("kcal left"),
         "kgLabel": MessageLookupByLibrary.simpleMessage("kg"),
         "lunchExample":
             MessageLookupByLibrary.simpleMessage("e.g. pizza, salad, rice ..."),
         "lunchLabel": MessageLookupByLibrary.simpleMessage("Lunch"),
         "mealBrandsLabel": MessageLookupByLibrary.simpleMessage("Brands"),
-        "mealCarbsLabel":
-            MessageLookupByLibrary.simpleMessage("carbs per 100 g/ml"),
-        "mealFatLabel":
-            MessageLookupByLibrary.simpleMessage("fat per 100 g/ml"),
-        "mealKcalLabel":
-            MessageLookupByLibrary.simpleMessage("kcal per 100 g/ml"),
+        "mealCarbsLabel": MessageLookupByLibrary.simpleMessage("carbs per"),
+        "mealFatLabel": MessageLookupByLibrary.simpleMessage("fat per"),
+        "mealKcalLabel": MessageLookupByLibrary.simpleMessage("kcal per"),
         "mealNameLabel": MessageLookupByLibrary.simpleMessage("Meal name"),
         "mealProteinLabel":
             MessageLookupByLibrary.simpleMessage("protein per 100 g/ml"),