Implement food entry lookup on entering a food name.

Now, an on-the-fly food lookup is created from existing entries on startup. Those entries are used to make suggestions when the user is typing to enter new food entries.

lib/enter_food_widget.dart

@@ -1,3 +1,6 @@
+import 'dart:developer';
+
+import 'package:calodiary/storage/storage.dart';
 import 'package:flutter/material.dart';
 import 'package:calodiary/food_entry_bloc.dart';
 import 'package:calodiary/row_with_spacers_widget.dart';
@@ -16,22 +19,53 @@ class _EnterFoodWidgetState extends State<EnterFoodWidget> {
   TextEditingController nameController = TextEditingController();
   TextEditingController massController = TextEditingController();
   TextEditingController kcalPerMassController = TextEditingController();
+  Map<String, double> suggestions = {};
+
+  @override
+  void initState() {
+    suggestions = FoodStorage.getInstance().getFoodEntryLookupDatabase;
+    super.initState();
+  }
 
   @override
   Widget build(BuildContext context) {
-    var nameWidget = TextField(
+    var nameWidget = Autocomplete<String>(
-      decoration: const InputDecoration(hintText: "Name"),
+        optionsViewOpenDirection: OptionsViewOpenDirection.down,
-      controller: nameController,
+        fieldViewBuilder: (context, controller, focusNode, onSubmitted) {
-    );
+          nameController = controller;
+          return TextFormField(
+              controller: controller,
+              focusNode: focusNode,
+              decoration: const InputDecoration(label: Text("Name")));
+        },
+        optionsBuilder: (TextEditingValue textEditingValue) {
+          if (textEditingValue.text == '') {
+            return const Iterable<String>.empty();
+          }
+
+          return suggestions.keys.where(
+            (name) {
+              return name
+                  .toLowerCase()
+                  .contains(textEditingValue.text.toLowerCase());
+            },
+          );
+        },
+        onSelected: (selectedFood) {
+          double kcalPerMassForSelectedFood = suggestions[selectedFood]!;
+          setState(() {
+            kcalPerMassController.text = kcalPerMassForSelectedFood.toString();
+          });
+        });
 
     var massWidget = TextField(
-      decoration: const InputDecoration(hintText: "Menge"),
+      decoration: const InputDecoration(label: Text("Menge")),
       keyboardType: TextInputType.number,
       controller: massController,
     );
 
     var kcalPerMassWidget = TextField(
-        decoration: const InputDecoration(hintText: "kcal pro 100g"),
+        decoration: const InputDecoration(label: Text("kcal pro")),
         keyboardType: TextInputType.number,
         controller: kcalPerMassController);
 

lib/food_entry_bloc.dart

@@ -4,7 +4,7 @@ import 'package:uuid/uuid.dart';
 
 class FoodEntryBloc extends Bloc<FoodEvent, FoodEntryState> {
   final FoodEntryState initialState;
-  final AppStorage storage;
+  final FoodStorage storage;
   final DateTime forDate;
 
   FoodEntryBloc(
@@ -12,16 +12,18 @@ class FoodEntryBloc extends Bloc<FoodEvent, FoodEntryState> {
       required this.forDate,
       required this.storage})
       : super(initialState) {
-    on<FoodEntryEvent>(addFoodEntry);
+    on<FoodEntryEvent>(handleFoodEntryEvent);
     on<FoodDeletionEvent>(deleteFood);
     on<PageChangedEvent>(updateEntries);
   }
 
-  void addFoodEntry(FoodEntryEvent event, Emitter<FoodEntryState> emit) async {
+  void handleFoodEntryEvent(
+      FoodEntryEvent event, Emitter<FoodEntryState> emit) async {
     FoodEntryState newState = FoodEntryState.from(state);
     newState.addEntry(event.entry);
 
     await storage.writeEntriesForDate(forDate, newState.foodEntries);
+    storage.addFoodEntryToLookupDatabase(event.entry);
 
     emit(newState);
   }

lib/food_entry_widget.dart

@@ -4,27 +4,34 @@ import 'package:calodiary/row_with_spacers_widget.dart';
 
 class FoodEntryWidget extends StatelessWidget {
   final FoodEntry entry;
-  final Function(BuildContext context) onDelete;
+  final Function(BuildContext context, String id) onDelete;
 
   const FoodEntryWidget(
       {super.key, required this.entry, required this.onDelete});
 
   @override
   Widget build(BuildContext context) {
-    return Card(
+    return Dismissible(
-      child: Padding(
+      key: ValueKey(entry.id),
-        padding: const EdgeInsets.only(left: 4.0),
+      onDismissed: (direction) {
-        child: RowWidget(
+        onDelete(context, entry.id);
-          Text(entry.name),
+      },
-          Text(entry.mass.ceil().toString()),
+      child: Card(
-          Text(entry.kcalPerMass.ceil().toString()),
+        elevation: 5.0,
-          Text((entry.mass * entry.kcalPerMass / 100).ceil().toString()),
+        child: Padding(
-          IconButton(
+          padding: const EdgeInsets.only(left: 4.0),
-              style: IconButton.styleFrom(padding: EdgeInsets.zero),
+          child: RowWidget(
-              onPressed: () {
+            Text(entry.name),
-                onDelete(context);
+            Text(entry.mass.ceil().toString()),
-              },
+            Text(entry.kcalPerMass.ceil().toString()),
-              icon: const Icon(Icons.delete_forever_rounded)),
+            Text((entry.mass * entry.kcalPerMass / 100).ceil().toString()),
+            IconButton(
+                style: IconButton.styleFrom(padding: EdgeInsets.zero),
+                onPressed: () {
+                  onDelete(context, entry.id);
+                },
+                icon: const Icon(Icons.delete_forever_rounded)),
+          ),
         ),
       ),
     );

lib/main.dart

@@ -10,7 +10,8 @@ import 'package:go_router/go_router.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
-  var storage = await AppStorage.create();
+  var storage = await FoodStorage.create();
+  await storage.buildFoodLookupDatabase();
   var kcalLimit = await storage.readLimit();
   var brightness = await storage.readBrightness();
 
@@ -24,7 +25,7 @@ void main() async {
 }
 
 class MainApp extends StatelessWidget {
-  final AppStorage storage;
+  final FoodStorage storage;
   final double kcalLimit;
   final String brightness;
 
@@ -36,38 +37,41 @@ class MainApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return MultiBlocProvider(
+    return SafeArea(
-      providers: [
+      child: MultiBlocProvider(
-        BlocProvider(
+        providers: [
-          create: (context) => SettingsDataBloc(
+          BlocProvider(
-              SettingsState(kcalLimit: kcalLimit),
+            create: (context) => SettingsDataBloc(
-              storage: storage),
+                SettingsState(kcalLimit: kcalLimit),
-        ),
+                storage: storage),
-        BlocProvider(
+          ),
-          create: (context) => ThemeDataBloc(ThemeState(brightness: brightness),
+          BlocProvider(
-              storage: storage),
+            create: (context) => ThemeDataBloc(
-        ),
+                ThemeState(brightness: brightness),
-      ],
+                storage: storage),
-      child: BlocBuilder<ThemeDataBloc, ThemeState>(
+          ),
-        builder: (context, state) {
+        ],
-          var switchToTheme = ThemeData.light();
+        child: BlocBuilder<ThemeDataBloc, ThemeState>(
-          if (state.brightness == 'dark') {
+          builder: (context, state) {
-            switchToTheme = ThemeData.dark();
+            var switchToTheme = ThemeData.light();
-          }
+            if (state.brightness == 'dark') {
+              switchToTheme = ThemeData.dark();
+            }
 
-          return MaterialApp.router(
+            return MaterialApp.router(
-            localizationsDelegates: const [
+              localizationsDelegates: const [
-              GlobalMaterialLocalizations.delegate,
+                GlobalMaterialLocalizations.delegate,
-              GlobalWidgetsLocalizations.delegate,
+                GlobalWidgetsLocalizations.delegate,
-              GlobalCupertinoLocalizations.delegate,
+                GlobalCupertinoLocalizations.delegate,
-            ],
+              ],
-            supportedLocales: const [
+              supportedLocales: const [
-              Locale('de'),
+                Locale('de'),
-            ],
+              ],
-            theme: switchToTheme,
+              theme: switchToTheme,
-            routerConfig: router,
+              routerConfig: router,
-          );
+            );
-        },
+          },
+        ),
       ),
     );
   }

lib/perdate_widget.dart

@@ -19,7 +19,7 @@ class PerDateWidget extends StatefulWidget {
 }
 
 class _PerDateWidgetState extends State<PerDateWidget> {
-  late AppStorage storage;
+  late FoodStorage storage;
   late Future<List<FoodEntry>> entriesFuture;
   late List<FoodEntry> entries;
 
@@ -27,7 +27,7 @@ class _PerDateWidgetState extends State<PerDateWidget> {
   void initState() {
     super.initState();
 
-    storage = AppStorage.getInstance();
+    storage = FoodStorage.getInstance();
     entriesFuture = storage.getEntriesForDate(widget.date);
     entriesFuture.then((val) {
       entries = val;
@@ -93,15 +93,20 @@ class _PerDateWidgetState extends State<PerDateWidget> {
                         );
                       }
 
-                      return FoodEntryWidget(
+                      return Column(
-                        entry: state.foodEntries[index],
+                        children: [
-                        onDelete: (callbackContext) {
+                          FoodEntryWidget(
-                          callbackContext
+                            entry: state.foodEntries[index],
-                              .read<FoodEntryBloc>()
+                            onDelete: (callbackContext, id) {
-                              .add(FoodDeletionEvent(
+                              callbackContext
-                                entryID: state.foodEntries[index].id,
+                                  .read<FoodEntryBloc>()
-                              ));
+                                  .add(FoodDeletionEvent(
-                        },
+                                    entryID: id,
+                                  ));
+                            },
+                          ),
+                          const Divider(),
+                        ],
                       );
                     },
                   );

lib/settings_bloc.dart

@@ -2,7 +2,7 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:calodiary/storage/storage.dart';
 
 class SettingsDataBloc extends Bloc<SettingsEvent, SettingsState> {
-  final AppStorage storage;
+  final FoodStorage storage;
 
   SettingsDataBloc(super.initialState, {required this.storage}) {
     on<DailyKcalLimitUpdated>(persistDailyLimit);

lib/storage/storage.dart

@@ -1,16 +1,19 @@
+import 'dart:developer';
 import 'dart:io';
 
 import 'package:calodiary/food_entry_bloc.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:universal_platform/universal_platform.dart';
 
-class AppStorage {
+class FoodStorage {
-  static late AppStorage _instance;
+  static late FoodStorage _instance;
   late String path;
-  AppStorage._create();
+  late Map<String, double> _foodLookupDatabase = {};
 
-  static Future<AppStorage> create() async {
+  FoodStorage._create();
-    var storage = AppStorage._create();
+
+  static Future<FoodStorage> create() async {
+    var storage = FoodStorage._create();
 
     Directory dir = Directory('');
 
@@ -26,7 +29,7 @@ class AppStorage {
     return _instance;
   }
 
-  static AppStorage getInstance() => _instance;
+  static FoodStorage getInstance() => _instance;
 
   Future<List<FoodEntry>> getEntriesForDate(DateTime date) async {
     List<FoodEntry> entries = [];
@@ -132,4 +135,32 @@ class AppStorage {
 
     await file.writeAsString(brightness);
   }
+
+  Future<void> buildFoodLookupDatabase() async {
+    // get a list of dates of the last 365 days
+    var dates = List<DateTime>.generate(365, (idx) {
+      var pastDay = Duration(days: idx);
+      return DateTime.now().subtract(pastDay);
+    });
+
+    for (var date in dates) {
+      addFoodEntryToLookupDatabaseFor(date);
+    }
+  }
+
+  Future<void> addFoodEntryToLookupDatabaseFor(DateTime date) async {
+    var entriesForDate = await getEntriesForDate(date);
+
+    for (var entry in entriesForDate) {
+      _foodLookupDatabase[entry.name] = entry.kcalPerMass;
+      log("Added entry: ${entry.name}/${entry.kcalPerMass}");
+    }
+  }
+
+  void addFoodEntryToLookupDatabase(FoodEntry entry) {
+    _foodLookupDatabase[entry.name] = entry.kcalPerMass;
+    log("Added entry: ${entry.name}/${entry.kcalPerMass}");
+  }
+
+  Map<String, double> get getFoodEntryLookupDatabase => _foodLookupDatabase;
 }

lib/theme_bloc.dart

@@ -2,7 +2,7 @@ import 'package:calodiary/storage/storage.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 
 class ThemeDataBloc extends Bloc<ThemeToggleEvent, ThemeState> {
-  final AppStorage storage;
+  final FoodStorage storage;
 
   ThemeDataBloc(super.initialState, {required this.storage}) {
     on<ThemeToggleEvent>(switchTheme);

pubspec.lock

@@ -53,10 +53,10 @@ packages:
     dependency: transitive
     description:
       name: crypto
-      sha256: ff625774173754681d66daaf4a448684fb04b78f902da9cb3d308c19cc5e8bab
+      sha256: ec30d999af904f33454ba22ed9a86162b35e52b44ac4807d1d93c288041d7d27
       url: "https://pub.dev"
     source: hosted
-    version: "3.0.3"
+    version: "3.0.5"
   fake_async:
     dependency: transitive
     description:
@@ -69,10 +69,10 @@ packages:
     dependency: transitive
     description:
       name: ffi
-      sha256: "493f37e7df1804778ff3a53bd691d8692ddf69702cf4c1c1096a2e41b4779e21"
+      sha256: "16ed7b077ef01ad6170a3d0c57caa4a112a38d7a2ed5602e0aca9ca6f3d98da6"
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.2"
+    version: "2.1.3"
   fixnum:
     dependency: transitive
     description:
@@ -121,10 +121,10 @@ packages:
     dependency: "direct main"
     description:
       name: go_router
-      sha256: cdae1b9c8bd7efadcef6112e81c903662ef2ce105cbd220a04bbb7c3425b5554
+      sha256: "2ddb88e9ad56ae15ee144ed10e33886777eb5ca2509a914850a5faa7b52ff459"
       url: "https://pub.dev"
     source: hosted
-    version: "14.2.0"
+    version: "14.2.7"
   intl:
     dependency: "direct main"
     description:
@@ -193,10 +193,10 @@ packages:
     dependency: transitive
     description:
       name: meta
-      sha256: "25dfcaf170a0190f47ca6355bdd4552cb8924b430512ff0cafb8db9bd41fe33b"
+      sha256: bdb68674043280c3428e9ec998512fb681678676b3c54e773629ffe74419f8c7
       url: "https://pub.dev"
     source: hosted
-    version: "1.14.0"
+    version: "1.15.0"
   nested:
     dependency: transitive
     description:
@@ -217,18 +217,18 @@ packages:
     dependency: "direct main"
     description:
       name: path_provider
-      sha256: c9e7d3a4cd1410877472158bee69963a4579f78b68c65a2b7d40d1a7a88bb161
+      sha256: fec0d61223fba3154d87759e3cc27fe2c8dc498f6386c6d6fc80d1afdd1bf378
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.3"
+    version: "2.1.4"
   path_provider_android:
     dependency: transitive
     description:
       name: path_provider_android
-      sha256: "9c96da072b421e98183f9ea7464898428e764bc0ce5567f27ec8693442e72514"
+      sha256: "6f01f8e37ec30b07bc424b4deabac37cacb1bc7e2e515ad74486039918a37eb7"
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.5"
+    version: "2.2.10"
   path_provider_foundation:
     dependency: transitive
     description:
@@ -257,10 +257,10 @@ packages:
     dependency: transitive
     description:
       name: path_provider_windows
-      sha256: "8bc9f22eee8690981c22aa7fc602f5c85b497a6fb2ceb35ee5a5e5ed85ad8170"
+      sha256: bd6f00dbd873bfb70d0761682da2b3a2c2fccc2b9e84c495821639601d81afe7
       url: "https://pub.dev"
     source: hosted
-    version: "2.2.1"
+    version: "2.3.0"
   platform:
     dependency: transitive
     description:
@@ -350,10 +350,10 @@ packages:
     dependency: transitive
     description:
       name: test_api
-      sha256: "2419f20b0c8677b2d67c8ac4d1ac7372d862dc6c460cdbb052b40155408cd794"
+      sha256: "5b8a98dafc4d5c4c9c72d8b31ab2b23fc13422348d2997120294d3bac86b4ddb"
       url: "https://pub.dev"
     source: hosted
-    version: "0.7.1"
+    version: "0.7.2"
   typed_data:
     dependency: transitive
     description:
@@ -374,10 +374,10 @@ packages:
     dependency: "direct main"
     description:
       name: uuid
-      sha256: "814e9e88f21a176ae1359149021870e87f7cddaf633ab678a5d2b0bff7fd1ba8"
+      sha256: f33d6bb662f0e4f79dcd7ada2e6170f3b3a2530c28fc41f49a411ddedd576a77
       url: "https://pub.dev"
     source: hosted
-    version: "4.4.0"
+    version: "4.5.0"
   vector_math:
     dependency: transitive
     description:
@@ -390,18 +390,10 @@ packages:
     dependency: transitive
     description:
       name: vm_service
-      sha256: "7475cb4dd713d57b6f7464c0e13f06da0d535d8b2067e188962a59bac2cf280b"
+      sha256: "5c5f338a667b4c644744b661f309fb8080bb94b18a7e91ef1dbd343bed00ed6d"
       url: "https://pub.dev"
     source: hosted
-    version: "14.2.2"
+    version: "14.2.5"
-  win32:
-    dependency: transitive
-    description:
-      name: win32
-      sha256: a79dbe579cb51ecd6d30b17e0cae4e0ea15e2c0e66f69ad4198f22a6789e94f4
-      url: "https://pub.dev"
-    source: hosted
-    version: "5.5.1"
   xdg_directories:
     dependency: transitive
     description: