Handle changing a food entry

lib/food_entry/enter_food_widget.dart

@@ -126,7 +126,7 @@ class _EnterFoodWidgetState extends State<EnterFoodWidget> {
     var entry = FoodEntryState(
       name: nameController.text,
       mass: massAsNumber,
-      kcalPerMass: kcalPerMassAsNumber,
+      kcalPer100: kcalPerMassAsNumber,
       waitingForNetwork: false,
     );
 

lib/food_entry/food_entry_bloc.dart

@@ -15,6 +15,7 @@ class FoodEntryBloc extends Bloc<FoodEvent, PageState> {
       required this.storage})
       : super(initialState) {
     on<FoodEntryEvent>(handleFoodEntryEvent);
+    on<FoodChangedEvent>(handleFoodChangedEvent);
     on<FoodDeletionEvent>(handleDeleteFoodEvent);
     on<BarcodeScanned>(handleBarcodeScannedEvent);
   }
@@ -30,6 +31,22 @@ class FoodEntryBloc extends Bloc<FoodEvent, PageState> {
     emit(newState);
   }
 
+  void handleFoodChangedEvent(
+      FoodChangedEvent event, Emitter<PageState> emit) async {
+    var entries = state.foodEntries;
+    var index = entries.indexWhere((entry) {
+      return entry.id == event.newEntry.id;
+    });
+
+    entries.removeAt(index);
+    entries.insert(index, event.newEntry);
+
+    await storage.writeEntriesForDate(forDate, entries);
+    storage.addFoodEntryToLookupDatabase(event.newEntry);
+
+    emit(PageState(foodEntries: entries));
+  }
+
   void handleDeleteFoodEvent(
       FoodDeletionEvent event, Emitter<PageState> emit) async {
     state.foodEntries.removeWhere((entry) => entry.id == event.entryID);
@@ -57,7 +74,7 @@ class FoodEntryBloc extends Bloc<FoodEvent, PageState> {
 
     List<FoodEntryState> newList = List.from(state.foodEntries);
     var newEntryWaiting = FoodEntryState(
-        kcalPerMass: 0, name: "", mass: 0, waitingForNetwork: true);
+        kcalPer100: 0, name: "", mass: 0, waitingForNetwork: true);
     newList.add(newEntryWaiting);
     emit(PageState(foodEntries: newList));
 
@@ -81,7 +98,7 @@ class FoodEntryBloc extends Bloc<FoodEvent, PageState> {
       var newEntryFinishedWaiting = FoodEntryState(
         name: response.food?.name ?? "",
         mass: response.food?.mass ?? 0,
-        kcalPerMass: response.food?.kcalPer100g ?? 0,
+        kcalPer100: response.food?.kcalPer100g ?? 0,
         waitingForNetwork: false,
       );
       newList.add(newEntryFinishedWaiting);
@@ -98,6 +115,12 @@ class FoodEntryEvent extends FoodEvent {
   FoodEntryEvent({required this.entry});
 }
 
+class FoodChangedEvent extends FoodEvent {
+  final FoodEntryState newEntry;
+
+  FoodChangedEvent({required this.newEntry});
+}
+
 class FoodDeletionEvent extends FoodEvent {
   final String entryID;
 
@@ -133,21 +156,37 @@ class PageState {
 class FoodEntryState {
   final String name;
   final int mass;
-  final int kcalPerMass;
+  final int kcalPer100;
   final String id;
   final bool waitingForNetwork;
 
-  FoodEntryState({
+  factory FoodEntryState({
+    required name,
+    required mass,
+    required kcalPer100,
+    required waitingForNetwork,
+  }) {
+    return FoodEntryState.withID(
+      id: const Uuid().v1(),
+      name: name,
+      mass: mass,
+      kcalPer100: kcalPer100,
+      waitingForNetwork: waitingForNetwork,
+    );
+  }
+
+  FoodEntryState.withID({
+    required this.id,
     required this.name,
     required this.mass,
-    required this.kcalPerMass,
+    required this.kcalPer100,
     required this.waitingForNetwork,
-  }) : id = const Uuid().v1();
+  });
 
   @override
   String toString() {
     //we use quotation marks around the name because the name might contain
     //commas and we want to store it in a csv file
-    return '$id,"$name",$mass,$kcalPerMass';
+    return '$id,"$name",$mass,$kcalPer100';
   }
 }

lib/food_entry/food_entry_widget.dart

@@ -5,9 +5,14 @@ import 'package:calorimeter/utils/row_with_spacers_widget.dart';
 class FoodEntryWidget extends StatefulWidget {
   final FoodEntryState entry;
   final Function(BuildContext context, String id) onDelete;
+  final Function(BuildContext context, FoodEntryState entry) onChange;
 
-  const FoodEntryWidget(
+  const FoodEntryWidget({
-      {super.key, required this.entry, required this.onDelete});
+    super.key,
+    required this.entry,
+    required this.onDelete,
+    required this.onChange,
+  });
 
   @override
   State<FoodEntryWidget> createState() => _FoodEntryWidgetState();
@@ -45,14 +50,21 @@ class _FoodEntryWidgetState extends State<FoodEntryWidget> {
                         ? Container()
                         : Text(widget.entry.mass.ceil().toString(),
                             textAlign: TextAlign.end),
-                    widget.entry.waitingForNetwork
-                        ? Container()
-                        : Text(widget.entry.kcalPerMass.ceil().toString(),
-                            textAlign: TextAlign.end),
                     Opacity(
                       opacity: showCancelAndDelete ? 0.0 : 1.0,
-                      child: Text(
+                      child: widget.entry.waitingForNetwork
-                          (widget.entry.mass * widget.entry.kcalPerMass / 100)
+                          ? Container()
+                          : Text(widget.entry.kcalPer100.ceil().toString(),
+                              textAlign: TextAlign.end),
+                    ),
+                    Opacity(
+                      opacity: showCancelAndDelete ? 0.0 : 1.0,
+                      child: widget.entry.waitingForNetwork
+                          ? Container()
+                          : Text(
+                              (widget.entry.mass *
+                                      widget.entry.kcalPer100 /
+                                      100)
                                   .ceil()
                                   .toString(),
                               textAlign: TextAlign.end),
@@ -92,6 +104,28 @@ class _FoodEntryWidgetState extends State<FoodEntryWidget> {
                           ? () => widget.onDelete(context, widget.entry.id)
                           : null),
                 ),
+                SizedBox(
+                  child: IconButton(
+                      padding: const EdgeInsets.all(0.0),
+                      icon: const Icon(Icons.edit),
+                      onPressed: showCancelAndDelete
+                          ? () async {
+                              await showDialog(
+                                context: context,
+                                builder: (dialogContext) {
+                                  return FoodEntryChangeDialog(
+                                      entry: widget.entry,
+                                      onChange: (context, entry) {
+                                        widget.onChange(context, entry);
+                                      });
+                                },
+                              );
+                              setState(() {
+                                showCancelAndDelete = false;
+                              });
+                            }
+                          : null),
+                ),
               ],
             ),
           ),
@@ -100,3 +134,124 @@ class _FoodEntryWidgetState extends State<FoodEntryWidget> {
     );
   }
 }
+
+class FoodEntryChangeDialog extends StatefulWidget {
+  final FoodEntryState entry;
+  final Function(BuildContext context, FoodEntryState entry) onChange;
+
+  const FoodEntryChangeDialog(
+      {required this.entry, super.key, required this.onChange});
+
+  @override
+  State<FoodEntryChangeDialog> createState() => _FoodEntryChangeDialogState();
+}
+
+class _FoodEntryChangeDialogState extends State<FoodEntryChangeDialog> {
+  late TextEditingController nameController;
+  late TextEditingController massController;
+  late TextEditingController kcalPer100Controller;
+
+  static const textFieldVerticalPadding = 16.0;
+  static const textFieldHorizontalPadding = 16.0;
+
+  @override
+  void initState() {
+    nameController = TextEditingController();
+    nameController.text = widget.entry.name;
+
+    massController = TextEditingController();
+    massController.text = widget.entry.mass.toString();
+
+    kcalPer100Controller = TextEditingController();
+    kcalPer100Controller.text = widget.entry.kcalPer100.toString();
+
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      content: Column(
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Padding(
+            padding: const EdgeInsets.symmetric(
+                vertical: textFieldVerticalPadding,
+                horizontal: textFieldHorizontalPadding),
+            child: TextField(
+              onSubmitted: (val) => _onSubmitAction(),
+              controller: nameController,
+              decoration: const InputDecoration(
+                label: Text("Name"),
+              ),
+            ),
+          ),
+          Padding(
+            padding: const EdgeInsets.symmetric(
+                vertical: textFieldVerticalPadding,
+                horizontal: textFieldHorizontalPadding),
+            child: TextField(
+              onSubmitted: (val) => _onSubmitAction(),
+              controller: massController,
+              decoration: const InputDecoration(
+                label: Text("Menge"),
+              ),
+            ),
+          ),
+          Padding(
+            padding: const EdgeInsets.symmetric(
+                vertical: textFieldVerticalPadding,
+                horizontal: textFieldHorizontalPadding),
+            child: TextField(
+              onSubmitted: (val) => _onSubmitAction(),
+              controller: kcalPer100Controller,
+              decoration: const InputDecoration(
+                label: Text("kcal pro Menge"),
+              ),
+            ),
+          )
+        ],
+      ),
+      actions: [
+        IconButton(
+            onPressed: () {
+              Navigator.of(context).pop();
+            },
+            icon: const Icon(Icons.cancel)),
+        IconButton(
+          onPressed: () => _onSubmitAction(),
+          icon: const Icon(Icons.check),
+        )
+      ],
+    );
+  }
+
+  void _onSubmitAction() {
+    int mass;
+    int kcalPer100;
+
+    try {
+      mass = int.parse(massController.text);
+    } catch (e) {
+      mass = 0;
+    }
+
+    try {
+      kcalPer100 = int.parse(kcalPer100Controller.text);
+    } catch (e) {
+      kcalPer100 = 0;
+    }
+
+    var newEntry = FoodEntryState.withID(
+      id: widget.entry.id,
+      name: nameController.text,
+      mass: mass,
+      kcalPer100: kcalPer100,
+      waitingForNetwork: widget.entry.waitingForNetwork,
+    );
+
+    widget.onChange(context, newEntry);
+
+    Navigator.of(context).pop();
+  }
+}

lib/perdate/entry_list.dart

@@ -39,11 +39,16 @@ class FoodEntryList extends StatelessWidget {
             FoodEntryWidget(
               key: ValueKey(entries[entryIndex].id),
               entry: entries[entryIndex],
-              onDelete: (callbackContext, id) {
+              onDelete: (_, id) {
-                callbackContext.read<FoodEntryBloc>().add(FoodDeletionEvent(
+                context.read<FoodEntryBloc>().add(FoodDeletionEvent(
                       entryID: id,
                     ));
               },
+              onChange: (_, changedEntry) {
+                context
+                    .read<FoodEntryBloc>()
+                    .add(FoodChangedEvent(newEntry: changedEntry));
+              },
             ),
             const Divider(),
           ],

lib/perdate/perdate_widget.dart

@@ -58,19 +58,20 @@ class _PerDateWidgetState extends State<PerDateWidget> {
                       if (pageState.errorString != null) {
                         showNewSnackbarWith(context, pageState.errorString!);
                       }
-                  }, builder: (context, pageState) {
+                    },
+                    builder: (context, pageState) {
                       return Scaffold(
                           appBar: AppBar(
-                          title:
+                            title: Text(
-                              Text(DateFormat.yMMMMd('de').format(widget.date)),
+                                DateFormat.yMMMMd('de').format(widget.date)),
                             actions: const [ThemeSwitcherButton()],
                           ),
                           body: FoodEntryList(entries: pageState.foodEntries),
                           bottomNavigationBar: BottomAppBar(
                               shape: const RectangularNotchShape(),
                               color: Theme.of(context).colorScheme.secondary,
-                            child:
+                              child: SumWidget(
-                                SumWidget(foodEntries: pageState.foodEntries)),
+                                  foodEntries: pageState.foodEntries)),
                           drawer: const AppDrawer(),
                           floatingActionButton: OverflowBar(children: [
                             ScanFoodFloatingButton(
@@ -90,7 +91,8 @@ class _PerDateWidgetState extends State<PerDateWidget> {
                           ]),
                           floatingActionButtonLocation:
                               FloatingActionButtonLocation.endDocked);
-                  }),
+                    },
+                  ),
                 );
         });
   }

lib/storage/storage.dart

@@ -62,7 +62,7 @@ class FoodStorage {
       var entry = FoodEntryState(
         name: fields[1].replaceAll('"', ""),
         mass: mass,
-        kcalPerMass: kcalPerMass,
+        kcalPer100: kcalPerMass,
         waitingForNetwork: false,
       );
       entries.add(entry);
@@ -169,14 +169,14 @@ class FoodStorage {
     var entriesForDate = await getEntriesForDate(date);
 
     for (var entry in entriesForDate) {
-      _foodLookupDatabase[entry.name] = entry.kcalPerMass;
+      _foodLookupDatabase[entry.name] = entry.kcalPer100;
-      log("Added entry: ${entry.name}/${entry.kcalPerMass}");
+      log("Added entry: ${entry.name}/${entry.kcalPer100}");
     }
   }
 
   void addFoodEntryToLookupDatabase(FoodEntryState entry) {
-    _foodLookupDatabase[entry.name] = entry.kcalPerMass;
+    _foodLookupDatabase[entry.name] = entry.kcalPer100;
-    log("Added entry: ${entry.name}/${entry.kcalPerMass}");
+    log("Added entry: ${entry.name}/${entry.kcalPer100}");
   }
 
   Map<String, int> get getFoodEntryLookupDatabase => _foodLookupDatabase;

lib/utils/sum_widget.dart

@@ -13,7 +13,7 @@ class SumWidget extends StatelessWidget {
       builder: (context, state) {
         var sum = 0.0;
         for (var entry in foodEntries) {
-          sum += entry.kcalPerMass / 100 * entry.mass;
+          sum += entry.kcalPer100 / 100 * entry.mass;
         }
         var diff = state.kcalLimit - sum;
         var diffLimit = state.kcalLimit ~/ 4;