Add field error accumulation.

[Iltotore]

Currently, errors on different fields are accumulated:

final payload = {'username': 'john'};
final validator = vine.compile(vine.object({
  'username': vine.string().minLength(3),
  'password': vine
    .string()
    .hasAtleastOneUpperCase() //Assuming some custom-defined extensions
    .hasAtleastOneLowerCase()
    .hasAtleastNumber()
})

//Error for both username (minLength) and password (string)
validator.validate({'username': 'a', 'password': 14})

But errors are short-circuiting on fields:

//Only the error for hasAtleastOneUpperCase is thrown
validator.validate({'username': 'Il_totore', 'password': 'abc'})

this is relevant when further validations depend on the first rule (e.g hasAtleastOneUpperCase depends on string) but there are many cases where we would like to accumulate fields error e.g:

//Error for hasAtleastOneUpperCase and hasAtleastOneNumber
validator.validate({'username': 'Il_totore', 'password': 'abc'})

a potential solution would be to add a rule operator (e.g batch)

<R> batch<R extends VineRule>(List<R Function(VineRule)>> rules)

final payload = {'username': 'john'};
final validator = vine.compile(vine.object({
  'username': vine.string().minLength(3),
  'password': vine
    .string()
    .batch([
      .hasAtleastOneUpperCase() //Assuming some custom-defined extensions
      .hasAtleastOneLowerCase()
      .hasAtleastNumber()
    ])
})

//Error for hasAtleastOneUpperCase and hasAtleastOneNumber
validator.validate({'username': 'Il_totore', 'password': 'abc'})

[LeadcodeDev]

Hello !
I'd like to thank you for your feedback. We could indeed consider allowing errors to accumulate without throwing errors until the complete string has been read.

Since version 3.8 of the SDK and via a specific flag, it is possible to propose a very similar syntax.

extension on String {
  void hasAtleastOneUpperCase() {}
  void hasAtleastOneLowerCase() {}
  void hasAtleastNumber() {}
}

final class StringValue {
  String _value;
  StringValue(this._value);

  StringValue batch(List<void Function(String)> modifiers) {
    for (final modifier in modifiers) {
      modifier(_value);
    }
  }
}

Example of usage < 3.8

final value = StringValue('Hello World');

value.batch([  
  (str) => str.hasAtleastOneUpperCase(),
  (str) => str.hasAtleastOneLowerCase(),
  (str) => str.hasAtleastNumber(),
])

Example of usage >= 3.8

final value = StringValue('Hello World');

value.batch([  
   .hasAtleastOneUpperCase(),
   .hasAtleastOneLowerCase(),
   .hasAtleastNumber(),
])

I will implement this approach as soon as possible.
Thanks a lot :)