liangchengyou / wow_english

  import 'package:flutter/cupertino.dart';

  import 'package:flutter_bloc/flutter_bloc.dart';

  
  part 'login_event.dart';
  part 'login_state.dart';
  

  enum LoginType {
    ///密码登陆
    pwd,
    ///验证码登陆
    sms,
  }
  

  class LoginBloc extends Bloc<LoginEvent, LoginState> {
  

    bool _canLogin = false;
    ///是否可以发送验证码
    bool _canSendSms = false;

    ///是否阅读协议
    bool _agreement = false;
    ///登陆方式
    LoginType _loginType = LoginType.sms;
  

    final TextEditingController phoneNumController = TextEditingController();
    final TextEditingController checkNumController = TextEditingController();

    bool get canLogin => _canLogin;
    bool get agreement => _agreement;
    LoginType get loginType => _loginType;
    bool get canSendSms => _canSendSms;

  
    LoginBloc() : super(LoginInitial()) {
      on<RequestLoginEvent>(_requestLoginApi);

      on<ChangeLoginTypeEvent>(_changeLoginType);
      on<PhoneNumChangeEvent>(_changePhoneNumber);
      on<AgreementChangeEvent>(_agreementTypeChange);

      on<CheckFieldChangeEvent>(_checkFiledChange);

    }
  
  

    ///请求登陆

    void _requestLoginApi(RequestLoginEvent event, Emitter<LoginState> emitter) async {

      emitter(LoginResultChangeState());

    }
  
    ///切换登陆方式
    void _changeLoginType(ChangeLoginTypeEvent event, Emitter<LoginState> emitter) async {
      if (_loginType == LoginType.sms) {
        _loginType = LoginType.pwd;
      } else {
        _loginType = LoginType.sms;
      }
      checkNumController.clear();
      if (_loginStateChange()) {
        emitter(LoginEventChangeState());
      }
      emitter(LoginTypeChangeState());
    }
  
    ///手机号输入
    void _changePhoneNumber(PhoneNumChangeEvent event, Emitter<LoginState> emitter) async {
      if(phoneNumController.text.isNotEmpty) {
        if (!_canSendSms) {
          _canSendSms = true;
          emitter(SmsSendTypeChangeState());
        }
        if (_loginStateChange()) {
          emitter(LoginEventChangeState());
        }
      } else {
        if (_canSendSms) {
          _canSendSms = false;
          emitter(SmsSendTypeChangeState());
        }
        if (_loginStateChange()) {
          emitter(LoginEventChangeState());
        }
      }
    }
  
    ///验证码/密码输入变化
    void _checkFiledChange(CheckFieldChangeEvent event,Emitter<LoginState> emitter) async {
      if (_loginStateChange()) {
        emitter(LoginEventChangeState());
      }
    }
  
    ///是否阅读协议
    void _agreementTypeChange(AgreementChangeEvent event, Emitter<LoginState> emitter) async {
      _agreement = !_agreement;
      emitter(AgreementTypeChangeState());
      if (_loginStateChange()) {
        emitter(LoginEventChangeState());
      }
    }
  

    ///登陆状态判断

    bool _loginStateChange() {
      if (_agreement) {
        if (phoneNumController.text.isNotEmpty && checkNumController.text.isNotEmpty) {
          if (!_canLogin) {
            _canLogin = true;
            return true;
          }
        } else {
          if (_canLogin) {
            _canLogin = false;
            return true;
          }
        }
      } else {
        if (_canLogin) {
          _canLogin = false;
          return true;
        }
      }
      return false;

    }
  }