convert metlusr to idntusr

internal/metal/models/users.go

@@ -1,12 +1,19 @@
 package models
 
-import "go.infratographer.com/x/gidx"
+import (
+	"crypto/sha256"
+	"encoding/base64"
+
+	"go.infratographer.com/x/gidx"
+)
 
 const (
-	MetalUserPrefix = "metlusr"
+	MetalUserIssuer         = "https://auth.equinix.com/"
+	MetalUserIssuerIDPrefix = "auth|"
 )
 
 type UserDetails struct {
+	id            *gidx.PrefixedID
 	ID            string                 `json:"id"`
 	FullName      string                 `json:"full_name"`
 	Organizations []*OrganizationDetails `json:"organizations"`
@@ -15,9 +22,37 @@ type UserDetails struct {
 }
 
 func (d *UserDetails) PrefixedID() gidx.PrefixedID {
-	if d.ID == "" {
-		return gidx.NullPrefixedID
+	if d.id != nil {
+		return *d.id
 	}
 
-	return gidx.PrefixedID(IDPrefixUser + "-" + d.ID)
+	nullID := gidx.NullPrefixedID
+
+	d.id = &nullID
+
+	if d.ID == "" {
+		return nullID
+	}
+
+	id, err := GenerateSubjectID(IdentityPrefixUser, MetalUserIssuer, MetalUserIssuerIDPrefix+d.ID)
+	if err != nil {
+		return nullID
+	}
+
+	d.id = &id
+
+	return *d.id
+}
+
+func GenerateSubjectID(prefix, iss, sub string) (gidx.PrefixedID, error) {
+	// Concatenate the iss and sub values, then hash them
+	issSub := iss + sub
+	issSubHash := sha256.Sum256([]byte(issSub))
+
+	digest := base64.RawURLEncoding.EncodeToString(issSubHash[:])
+
+	// Concatenate the prefix with the digest
+	out := prefix + "-" + digest
+
+	return gidx.Parse(out)
 }