Flutter-Ernaehrungsapp/lib/android/components/card_component.dart

import 'package:flutter/material.dart';
import 'package:flutter_dotenv/flutter_dotenv.dart';
import '../models/food.dart';
import '../pages/nav_pages/search_food.dart';

class CardComponent extends StatefulWidget {
  final String eatingMealName;
  final List<Food> selectedMeal;
  final bool addButtonVisible;

  const CardComponent(
      {Key? key, required this.eatingMealName, required this.selectedMeal, this.addButtonVisible = true})
      : super(key: key);

  @override
  State<CardComponent> createState() => _CardComponentState();
}

class _CardComponentState extends State<CardComponent> {
  Route createRoute(String cardName) {
    return PageRouteBuilder(
      pageBuilder: (context, animation, secondaryAnimation) =>
          SearchFoodPage(cardName),
      transitionsBuilder: (context, animation, secondaryAnimation, child) {
        const begin = Offset(0.0, 1.0);
        const end = Offset.zero;
        const curve = Curves.ease;

        var tween =
            Tween(begin: begin, end: end).chain(CurveTween(curve: curve));

        return SlideTransition(
          position: animation.drive(tween),
          child: child,
        );
      },
    );
  }

  getImageOfMeal() {
    if (widget.eatingMealName.toLowerCase() == dotenv.env['BREAKFAST_FIELD']!.toLowerCase()) {
      return const Image(image: AssetImage('assets/images/tea.png'));
    } else if (widget.eatingMealName.toLowerCase() == dotenv.env['LUNCH_FIELD']!.toLowerCase()) {
      return const Image(image: AssetImage('assets/images/fries.png'));
    } else if (widget.eatingMealName.toLowerCase() == dotenv.env['DINNER_FIELD']!.toLowerCase()) {
      return const Image(image: AssetImage('assets/images/ice.png'));
    }
  }

  String capitalize(String s) => s[0].toUpperCase() + s.substring(1);

  String listFoodAsString() {
    String mealAsString = "";
    for (final food in widget.selectedMeal) {
      mealAsString = "${food.name} ";
    }
    return mealAsString;
  }

  Widget getElevatedButton() {
    if(widget.addButtonVisible){
      return ElevatedButton(
        onPressed: () async {
          Navigator.of(context).push(createRoute(widget.eatingMealName));
        },
        style: ElevatedButton.styleFrom(
          shape: const CircleBorder(),
          padding: const EdgeInsets.all(0),
        ),
        child: const Text(
          '+',
          style: TextStyle(fontSize: 28),
        ),
      );
    }else{
      return const SizedBox.shrink();
    }

  }

  int getCountedCalories() {
    double calories = 0;
    for (Food food in widget.selectedMeal) {
      if (food.calories is int){
        calories += food.calories as int;
      }else if(food.calories is double){
        calories += food.calories as double;
      }
    }
    return calories.round();
  }

  Map<String,List<int>> getMapOfDistinctElementsWithCounterAndCalories(List<Food> foods){
    Map<String,List<int>> resultMap = <String,List<int>>{};
    for(int i = 0; i < foods.length;i++){
      if(!resultMap.keys.contains(foods[i].name)){
        resultMap.putIfAbsent(foods[i].name, () => [1,foods[i].calories]);
      }else{
        resultMap[foods[i].name]![0] = resultMap[foods[i].name]![0] + 1;
      }
    }
    return resultMap;
  }

  String getFoodListStringByFood(String foodName, int count, int calories){
    int maxWidth = 35;
    String limitedText = foodName.length > maxWidth ? "${foodName.substring(0, maxWidth - 3)} ... $count x $calories kcal" : "$foodName $count x $calories kcal";
    return limitedText;
  }

  @override
  Widget build(BuildContext context) {
    return Card(
        margin: const EdgeInsets.fromLTRB(0, 24, 0, 0),
        child: Column(
          children: [
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: [
                Row(
                  children: [
                    getImageOfMeal(),
                    Column(
                      mainAxisAlignment: MainAxisAlignment.start,
                      children: [
                        SizedBox(
                          width: MediaQuery.of(context).size.width * 0.6,
                          child: Text(
                            capitalize(widget.eatingMealName),
                            maxLines: 1,
                            overflow: TextOverflow.ellipsis,
                            softWrap: false,
                            style: const TextStyle(
                                color: Colors.black,
                                fontWeight: FontWeight.w500,
                                fontSize: 14),
                          ),
                        ),
                      ],
                    )
                  ],
                ),
                getElevatedButton(),
              ],
            ),
            SizedBox(
              width: MediaQuery.of(context).size.width * 0.8,
              child:ListView.builder(
                  primary: false,
                  shrinkWrap: true,
                  itemCount: getMapOfDistinctElementsWithCounterAndCalories(widget.selectedMeal).keys.length,
                  itemBuilder: (context, i) {
                    Map<String,List<int>> map = getMapOfDistinctElementsWithCounterAndCalories(widget.selectedMeal);
                    String foodName = map.keys.elementAt(i);
                    List<int> values = map.values.elementAt(i);
                    return Text(
                      getFoodListStringByFood(foodName, values[0], values[1])
                    );
                  }
              ),
            ),
            widget.selectedMeal.isNotEmpty
                ? const Divider()
                : const SizedBox.shrink(),
            widget.selectedMeal.isNotEmpty
                ? Text("${getCountedCalories()} kcal")
                : const SizedBox.shrink(),
          ],
        ));
  }
}