anyway/frontend/lib/modules/new_trip_button.dart

import 'package:anyway/layout.dart';
import 'package:anyway/structs/preferences.dart';
import 'package:anyway/structs/trip.dart';
import 'package:anyway/utils/fetch_trip.dart';
import 'package:auto_size_text/auto_size_text.dart';
import 'package:flutter/material.dart';


class NewTripButton extends StatefulWidget {
  final Trip trip;

  const NewTripButton({required this.trip});

  @override
  State<NewTripButton> createState() => _NewTripButtonState();
}

class _NewTripButtonState extends State<NewTripButton> {

  @override
  Widget build(BuildContext context) {
    return ListenableBuilder(
      listenable: widget.trip,
      builder: (BuildContext context, Widget? child) {
        if (widget.trip.landmarks.isEmpty){
          return Container();
        }
        return SizedBox(
          width: 200,
          child: ElevatedButton(
            onPressed: () async {
              Future<UserPreferences> preferences = loadUserPreferences();
              Trip trip = widget.trip;
              fetchTrip(trip, preferences);
              Navigator.of(context).push(
                MaterialPageRoute(
                  builder: (context) => BasePage(mainScreen: "map", trip: trip)
                )
              );
            },
            child: Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Icon(
                  Icons.add,
                ),
                Expanded(
                  child: Padding(
                    padding: EdgeInsets.only(left: 10, top: 5, bottom: 5, right: 5),
                    child: FutureBuilder(
                      future: widget.trip.cityName,
                      builder: (context, snapshot) {
                        if (snapshot.connectionState == ConnectionState.done) {
                          return AutoSizeText(
                            'New trip to ${snapshot.data.toString()}',
                            style: TextStyle(fontSize: 18),
                            maxLines: 2,
                          );
                        } else {
                          return AutoSizeText(
                            'New trip to ...',
                            style: TextStyle(fontSize: 18),
                            maxLines: 2,
                          );
                        }
                      },
                    )
                  )
                )
              ],
            ),
          ),
        );
      } 
    );
  }
}