mchess-client/lib/pages/join_game.dart

import 'dart:convert';
import 'dart:developer';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:http/http.dart' as http;
import 'package:http/http.dart';
import 'package:mchess/api/register.dart';
import 'package:mchess/connection_cubit/connection_cubit.dart';
import 'package:mchess/pages/chess_game.dart';

class JoinGameWidget extends StatefulWidget {
  const JoinGameWidget({
    super.key,
  });

  @override
  State<JoinGameWidget> createState() => _JoinGameWidgetState();
}

class _JoinGameWidgetState extends State<JoinGameWidget> {
  final myController = TextEditingController();
  late Future<PlayerInfo?> joinGameFuture;

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: TextField(
        controller: myController,
        decoration: InputDecoration(
            hintText: 'Enter passphrase here',
            suffixIcon: IconButton(
              onPressed: () {
                joinGameFuture = joinPrivateGame();
                switchToGame(joinGameFuture);
              },
              icon: const Icon(Icons.check),
            )),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          context.push('/');
        },
        child: const Icon(Icons.cancel),
      ),
    );
  }

  void switchToGame(Future<PlayerInfo?> resp) {
    resp.then((value) {
      if (value == null) return;

      var chessGameArgs = ChessGameArguments(
          lobbyID: value.lobbyID!,
          playerID: value.playerID!,
          passphrase: value.passphrase);

      ConnectionCubit.getInstance().connect(
        value.playerID!.uuid,
        value.lobbyID!.uuid,
        value.passphrase,
      );

      context.push('/game', extra: chessGameArgs);
    });
  }

  Future<PlayerInfo?> joinPrivateGame() async {
    String addr;
    Response response;

    // server expects us to send the passphrase
    var info = PlayerInfo(
        playerID: null, lobbyID: null, passphrase: myController.text);

    if (kDebugMode) {
      addr = 'http://localhost:8080/api/joinPrivate';
    } else {
      addr = 'https://chess.sw-gross.de:9999/api/joinPrivate';
    }

    try {
      response = await http.post(Uri.parse(addr),
          body: jsonEncode(info), headers: {"Accept": "application/json"});
    } catch (e) {
      log(e.toString());

      if (!context.mounted) return null;

      const snackBar = SnackBar(
        backgroundColor: Colors.amberAccent,
        content: Text("mChess server is not responding. Try again or give up"),
      );
      Future.delayed(const Duration(seconds: 2), () {
        ScaffoldMessenger.of(context).clearSnackBars();
        ScaffoldMessenger.of(context).showSnackBar(snackBar);
        context.pop();
      });
      return null;
    }

    if (response.statusCode == 200) {
      var info = PlayerInfo.fromJson(jsonDecode(response.body));
      log('Player info received from server: ');
      log('lobbyID: ${info.lobbyID}');
      log('playerID: ${info.playerID}');
      log('passphrase: ${info.passphrase}');
      return info;
    }
    return null;
  }
}