Add helper to get the nutritional plan's label

Returns the name or the term "nutritional plan"

Author: rolandgeider

lib/models/nutrition/nutritional_plan.dart

@@ -16,6 +16,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+import 'package:flutter/widgets.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:json_annotation/json_annotation.dart';
 import 'package:wger/helpers/consts.dart';
 import 'package:wger/helpers/json.dart';
@@ -64,6 +66,10 @@ class NutritionalPlan {
 
   Map<String, dynamic> toJson() => _$NutritionalPlanToJson(this);
 
+  String getLabel(BuildContext context) {
+    return description != '' ? description : AppLocalizations.of(context).nutritionalPlan;
+  }
+
   /// Calculations
   NutritionalValues get nutritionalValues {
     // This is already done on the server. It might be better to read it from there.

lib/screens/nutritional_plan_screen.dart

@@ -101,7 +101,7 @@ class NutritionalPlanScreen extends StatelessWidget {
               ),
             ],
             flexibleSpace: FlexibleSpaceBar(
-              title: Text(_nutritionalPlan.description),
+              title: Text(_nutritionalPlan.getLabel(context)),
               background: const Image(
                 image: AssetImage('assets/images/backgrounds/nutritional_plans.jpg'),
                 fit: BoxFit.cover,
@@ -126,7 +126,7 @@ class NutritionalPlanScreen extends StatelessWidget {
                       )
                     : Consumer<NutritionPlansProvider>(
                         builder: (context, value, child) =>
-                            NutritionalPlanDetailWidget(_nutritionalPlan),
+                            NutritionalPlanDetailWidget(_nutritionalPlan)
                       ),
           ),
         ],

lib/widgets/nutrition/nutritional_plans_list.dart

@@ -102,7 +102,7 @@ class NutritionalPlansList extends StatelessWidget {
                     arguments: currentPlan,
                   );
                 },
-                title: Text(currentPlan.description),
+                title: Text(currentPlan.getLabel(context)),
                 subtitle: Text(
                   DateFormat.yMd(Localizations.localeOf(context).languageCode)
                       .format(currentPlan.creationDate),