diameter/lib/screens/log/log_meal_list.dart

import 'package:diameter/components/dialogs.dart';
import 'package:diameter/config.dart';
import 'package:diameter/models/log_entry.dart';
import 'package:diameter/models/log_meal.dart';
import 'package:diameter/screens/log/log_meal_detail.dart';
import 'package:flutter/material.dart';
import 'package:diameter/components/progress_indicator.dart';

class LogMealListScreen extends StatefulWidget {
  final LogEntry? logEntry;

  const LogMealListScreen({Key? key, this.logEntry}) : super(key: key);

  @override
  _LogMealListScreenState createState() => _LogMealListScreenState();
}

class _LogMealListScreenState extends State<LogMealListScreen> {
  void refresh({String? message}) {
    if (widget.logEntry != null) {
      setState(() {
        widget.logEntry!.meals = LogMeal.fetchAllForLogEntry(widget.logEntry!);
      });
    }
    setState(() {
      if (message != null) {
        var snackBar = SnackBar(
          content: Text(message),
          duration: const Duration(seconds: 2),
        );
        ScaffoldMessenger.of(context)
          ..removeCurrentSnackBar()
          ..showSnackBar(snackBar);
      }
    });
  }

  void handleEditAction(LogMeal meal) {
    Navigator.push(
      context,
      MaterialPageRoute(
        builder: (context) => LogMealDetailScreen(
          logEntry: widget.logEntry!,
          logMeal: meal,
        ),
      ),
    ).then((message) => refresh(message: message));
  }

  void onDelete(LogMeal meal) {
    meal.delete().then((_) => refresh(message: 'Meal deleted'));
  }

  void handleDeleteAction(LogMeal meal) async {
    if (showConfirmationDialogOnDelete) {
      Dialogs.showConfirmationDialog(
        context: context,
        onConfirm: () => onDelete(meal),
        message: 'Are you sure you want to delete this Meal?',
      );
    } else {
      onDelete(meal);
    }
  }

  @override
  void initState() {
    super.initState();
    refresh();
  }

  @override
  Widget build(BuildContext context) {
    return SingleChildScrollView(
      padding: const EdgeInsets.only(top: 10.0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: [
          FutureBuilder<List<LogMeal>>(
            future: widget.logEntry!.meals,
            builder: (context, snapshot) {
              return ViewWithProgressIndicator(
                snapshot: snapshot,
                child: snapshot.data == null || snapshot.data!.isEmpty
                    ? const Padding(
                        padding: EdgeInsets.all(10.0),
                        child: Text('No Meals for this Log Entry'),
                      )
                    : ListView.builder(
                      shrinkWrap: true,
                      itemCount: snapshot.data != null ? snapshot.data!.length : 0,
                      itemBuilder: (context, index) {
                        final meal = snapshot.data![index];
                        return ListTile(
                          onTap: () => handleEditAction(meal),
                          title: Row(
                            children: [
                              Expanded(
                                child: Text(meal.value)),
                              Expanded(
                                child: Text(meal.carbsPerPortion != null ? '${meal.carbsPerPortion} g carbs' : '')),
                              Expanded(child: Text(meal.bolus != null ? '${meal.bolus} U' : ''))
                            ],
                          ),
                          trailing: IconButton(
                                  icon: const Icon(
                                    Icons.delete,
                                    color: Colors.blue,
                                  ),
                                  onPressed: () => handleDeleteAction(meal),
                                ),
                        );
                      },
                    ),
              );
            },
          ),
        ],
      ),
    );
  }
}