anyway/frontend/lib/modules/current_trip_loading_indicator.dart

import 'package:flutter/material.dart';
import 'package:auto_size_text/auto_size_text.dart';

import 'package:anyway/structs/trip.dart';
import 'package:anyway/pages/current_trip.dart';

class CurrentTripLoadingIndicator extends StatefulWidget {
  final Trip trip;
  const CurrentTripLoadingIndicator({
    super.key,
    required this.trip,
  });

  @override
  State<CurrentTripLoadingIndicator> createState() => _CurrentTripLoadingIndicatorState();
}

class _CurrentTripLoadingIndicatorState extends State<CurrentTripLoadingIndicator> {
  @override
  Widget build(BuildContext context) => Center(
    child: FutureBuilder(
      future: widget.trip.cityName,
      builder: (BuildContext context, AsyncSnapshot<String> snapshot) {
        Widget greeter;
        Widget loadingIndicator = const Padding(
          padding: EdgeInsets.only(top: 10),
          child: CircularProgressIndicator()
        );

        if (snapshot.hasData) {
          greeter = AutoSizeText(
            maxLines: 1,
            'Generating your trip to ${snapshot.data}...',
            style: greeterStyle,
          );
        } else if (snapshot.hasError) {
          // the exact error is shown in the central part of the trip overview. No need to show it here
          greeter = AutoSizeText(
            maxLines: 1,
            'Error while loading trip.',
            style: greeterStyle,
            );
        } else {
          greeter = AutoSizeText(
            maxLines: 1,
            'Generating your trip...',
            style: greeterStyle,
            );
        }
        return Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            greeter,
            loadingIndicator,
          ],
        );
      }
    )
  );
}