package validate

import (
	"errors"
)

// Collect validates a value against a sequence of validation functions,
// like All, but runs every function instead of stopping at the first
// failure. All failures are returned together as one joined error (see
// errors.Join); errors.Is still matches each individual error contained in
// it. If nothing fails, Collect returns nil.
func Collect[T any](fs ...func(T) error) func(T) error {
	return func(value T) error {
		var errs []error

		for _, f := range fs {
			if err := f(value); err != nil {
				errs = append(errs, err)
			}
		}

		return errors.Join(errs...)
	}
}