Created
October 17, 2019 11:08
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import 'dart:async'; | |
class LoginFormModel { | |
final emailController = StreamController<String>(); | |
final passwordController = StreamController<String>(); | |
Function(String) get changeEmail => emailController.sink.add; | |
Function(String) get changePassword => passwordController.sink.add; | |
Stream<String> get email => emailController.stream.transform(validateEmail); | |
Stream<String> get password => | |
passwordController.stream.transform(validatePassword); | |
submit() { | |
print("form submitted"); | |
} | |
//The validation of the email. It must contain @ | |
final validateEmail = StreamTransformer<String, String>.fromHandlers( | |
handleData: (email, sink) { | |
if (email.contains("@")) { | |
sink.add(email); | |
} else { | |
sink.addError("Enter a valid Email"); | |
} | |
}, | |
); | |
//The validation of the password. It must have more than three characters | |
final validatePassword = StreamTransformer<String, String>.fromHandlers( | |
handleData: (password, sink) { | |
if (password.length > 3) { | |
sink.add(password); | |
} else { | |
sink.addError("Enter a valid password"); | |
} | |
}, | |
); | |
//Disposing the controllers | |
dispose() { | |
emailController.close(); | |
passwordController.close(); | |
print("controllers are disposed"); | |
} | |
} |
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