liangchengyou / wow_english

  import 'package:flutter/cupertino.dart';

  import 'package:flutter/foundation.dart';

  import 'package:flutter_bloc/flutter_bloc.dart';

  import 'package:wow_english/common/extension/string_extension.dart';

  import 'package:wow_english/common/request/dao/user_dao.dart';

  import 'package:wow_english/common/request/exception.dart';

  import 'package:wow_english/utils/loading.dart';

  import 'package:wow_english/utils/toast_util.dart';

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

  enum LoginType {

    ///密码登录

    pwd,

    ///验证码登录

    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;

    ///登录方式

    //LoginType _loginType = LoginType.sms;
    bool _isSmsLoginType = true;

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

    bool get canLogin => _canLogin;

    bool get agreement => _agreement;

  
    //LoginType get loginType => _loginType;
  
    bool get isSmsLoginType => _isSmsLoginType;
  

    bool get canSendSms => _canSendSms;

    LoginBloc(bool preferencesPasswordLogin) : super(LoginInitial()) {
      _isSmsLoginType = !preferencesPasswordLogin;

      on<RequestLoginEvent>(_requestLoginApi);

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

      on<CheckFieldChangeEvent>(_checkFiledChange);

      on<RequestSmsCodeEvent>(_requestSmsCodeApi);

    }
  

    ///请求登录

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

      var phoneNumber = phoneNumController.text;
      if (phoneNumber.isEmpty) {

        showToast('号码不能为空');

        return;
      }
  
      var checkNumber = checkNumController.text;
      if (checkNumber.isEmpty) {
        var text = _isSmsLoginType ? '密码' : '验证码';

        showToast('$text不能为空');

        return;
      }
      var checkKey = _isSmsLoginType ? 'smsCode' : 'password';
      var type = _isSmsLoginType ? 'sms_code' : 'pwd';

      if (type == 'pwd') {//md5加密

        // checkNumber = EncryptUtil.encodeMd5(checkNumber);

      }

      try {

        await loading(() async {
          var user = await UserDao.login(phoneNumber, type, checkKey, checkNumber);

          if (kDebugMode) {

            print('登录 UserEntity=$user');

          }

          emitter.call(LoginResultChangeState());

        });
      } catch (e) {

        if (kDebugMode) {
          print(e);
        }

        showToast('登录失败${(e as ApiException?)?.message?.prefixColon}');

      }

    }
  

    ///请求验证码

    void _requestSmsCodeApi(RequestSmsCodeEvent event, Emitter<LoginState> emitter) async {
      final phoneNumber = phoneNumController.text;

      if (phoneNumber.length != 11) {

        showToast('请检查手机号');

        return;
      }
      try {
        await loading(() async {
          await UserDao.sendCode(phoneNumber);
        });
        emitter(SmsCodeRequestState());
      } catch (e) {

        if (kDebugMode) {
          print(e);
        }

        showToast('获取验证码失败${(e as ApiException?)?.message?.prefixColon}');

      }
    }

    ///切换登录方式

    void _changeLoginType(ChangeLoginTypeEvent event, Emitter<LoginState> emitter) async {

      if (_isSmsLoginType) {
        _isSmsLoginType = false;

      } else {

        _isSmsLoginType = true;

      }
      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());
      }
    }
  

    ///登录状态判断

    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;

    }
  }