form_input

Description:

form input

Introduction #
A simple form input representation helper class highly inspired by the formz package.
Examples #
class EmailInput extends FormInput<String, Exception> {
const EmailInput.pure([String value = '']) : super.pure(value);
const EmailInput.dirty(String value) : super.dirty(value);
// 'status' will be invalid, the validate function will be ignored.
const EmailInput.invalid(String value, Exception e) : super.invalid(value, e);

@override
String sanitize(String value) {
// 'rawValue' will be the value before the sanitize function called.
// 'value' will be the value after the sanitize function called.
return value.trim();
}

@override
Exception? validate(String value) {
if (value.isEmpty) {
// Return Exception in case the validation fails.
return FormatException('The email is empty.', value);
}
// Return null if the value is valid.
return null;
}
}
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