Ilia Denisov
66 lines
1.7 KiB
Go
66 lines
1.7 KiB
Go
package local
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import (
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"fmt"
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"strings"
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"galaxy/user/internal/domain/account"
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"galaxy/user/internal/domain/common"
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"galaxy/user/internal/ports"
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confusables "github.com/disciplinedware/go-confusables"
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"golang.org/x/text/cases"
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)
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type confusableSkeletoner interface {
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Skeleton(string) string
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}
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type raceNamePolicy struct {
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caseFolder cases.Caser
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skeletoner confusableSkeletoner
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}
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var raceNameAntiFraudReplacer = strings.NewReplacer(
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"1", "i",
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"0", "o",
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"8", "b",
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)
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// NewRaceNamePolicy returns the local Stage 06 race-name canonicalization
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// policy backed by Unicode case folding, explicit ASCII anti-fraud mappings,
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// and a TR39 confusable skeleton.
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func NewRaceNamePolicy() (ports.RaceNamePolicy, error) {
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policy := &raceNamePolicy{
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caseFolder: cases.Fold(),
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skeletoner: confusables.Default(),
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}
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if policy.skeletoner == nil {
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return nil, fmt.Errorf("new race-name policy: nil confusable skeletoner")
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}
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return policy, nil
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}
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// CanonicalKey returns the stable uniqueness key for raceName.
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func (policy *raceNamePolicy) CanonicalKey(raceName common.RaceName) (account.RaceNameCanonicalKey, error) {
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switch {
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case policy == nil:
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return "", fmt.Errorf("canonicalize race name: nil policy")
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case policy.skeletoner == nil:
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return "", fmt.Errorf("canonicalize race name: nil confusable skeletoner")
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}
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if err := raceName.Validate(); err != nil {
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return "", fmt.Errorf("canonicalize race name: %w", err)
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}
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folded := policy.caseFolder.String(raceName.String())
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antiFraudMapped := raceNameAntiFraudReplacer.Replace(folded)
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key := account.RaceNameCanonicalKey(policy.skeletoner.Skeleton(antiFraudMapped))
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if err := key.Validate(); err != nil {
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return "", fmt.Errorf("canonicalize race name: %w", err)
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}
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return key, nil
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}
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