fluent_validation

Description:

fluent validation

Fluent Validation #
This is a port of the C# variant as can be seen at This Link
The goal with this was to decouple the UI validation as seen in Flutters TextFields and use a more common and readable standard. It is still very much beta so please give it a go and give me your feedback.
class UserValidator extends AbstractValidator<User> {
UserValidator() {
ruleFor((user) => user.age, key: 'age').isNotNull().greaterThanOrEqual(13);
ruleFor((user) => user.name, key: 'name').isNotEmpty();
}
}

// Later on
final UserValidator validator = UserValidator();
ValidationResult result = validator.validate(user);

result.errors.first.key == 'The key of the rule that errored (for example age)'
result.errors.first.message == 'The supplied error message (Passed by you, or default)'
result.errors.first.code == 'The error code'
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Features #

Built in validators (Most included, as well as some extra ones)
Custom validators (Only supported through the 'must' matcher at the moment)
Localisation (Not done yet)

Built in Validators #

isNull - (checks the object is null)
isNotNull - (checks the object is not null)
notEmpty - (checks the object is a String and not empty)
empty - (checks the object is a String and is empty)
notEqual - (checks if an object is not equal to another)
equal - (checks if an object is equal to another)
length - (checks the object is a String and is between two other numbers)
minLength - (checks the object is a String and is of a minimum length)
maxLength - (checks the object is a String and is at least of a maximum length)
lessThan - (checks the object is a number and is less than another number)
lessThanOrEqual - (checks the object is a number and is less than or equal to another number)
greaterThan - (checks the object is a number and is greater than another number)
greaterThanOrEqual - (checks the object is a number and is greater than or equal to another number)

Extra Built In Validators #
These are not included in the default C# version.

isValidEmailAddress - (checks the object is a String and is a valid email address)
isValidPhoneNumber - (checks the object is a String and is a valid phone number)
isValidNationalInsuranceNumber - (checks the object is a String and is a valid UK national insurance number)
isValidUKPostCode - (checks the object is a String and is a valid UK post code)

Contributing #
Feel free to do a pull request with any ideas and I will check each one.
¬ Rad