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package plaintext
import (
"fmt"
"github.com/go-crypt/crypt/algorithm"
)
// Opt describes the functional option pattern for the plaintext.Hasher.
type Opt func(h *Hasher) (err error)
// WithVariant configures the plaintext.Variant of the resulting plaintext.Digest.
// Default is plaintext.VariantPlainText.
func WithVariant(variant Variant) Opt {
return func(h *Hasher) (err error) {
switch variant {
case VariantNone, VariantPlainText, VariantBase64:
h.variant = variant
return nil
default:
return fmt.Errorf(algorithm.ErrFmtHasherValidation, AlgName, fmt.Errorf("%w: variant '%d' is invalid", algorithm.ErrParameterInvalid, variant))
}
}
}
// WithVariantName uses the variant name or identifier to configure the plaintext.Variant of the resulting plaintext.Digest.
// Default is plaintext.VariantPlainText.
func WithVariantName(identifier string) Opt {
return func(h *Hasher) (err error) {
if identifier == "" {
return nil
}
variant := NewVariant(identifier)
if variant == VariantNone {
return fmt.Errorf(algorithm.ErrFmtHasherValidation, AlgName, fmt.Errorf("%w: variant identifier '%s' is invalid", algorithm.ErrParameterInvalid, identifier))
}
h.variant = variant
return nil
}
}
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