feat: add domain verification (#560)

* feat: add domain verification

* add checks

* add and fix tests

* fix go.mod

* regenerate proto

internal/org/model/domain.go

@@ -1,12 +1,41 @@
 package model
 
-import es_models "github.com/caos/zitadel/internal/eventstore/models"
+import (
+	http_util "github.com/caos/zitadel/internal/api/http"
+	"github.com/caos/zitadel/internal/crypto"
+	es_models "github.com/caos/zitadel/internal/eventstore/models"
+)
 
 type OrgDomain struct {
 	es_models.ObjectRoot
-	Domain   string
-	Primary  bool
-	Verified bool
+	Domain         string
+	Primary        bool
+	Verified       bool
+	ValidationType OrgDomainValidationType
+	ValidationCode *crypto.CryptoValue
+}
+
+type OrgDomainValidationType int32
+
+const (
+	OrgDomainValidationTypeUnspecified OrgDomainValidationType = iota
+	OrgDomainValidationTypeHTTP
+	OrgDomainValidationTypeDNS
+)
+
+func (t OrgDomainValidationType) CheckType() (http_util.CheckType, bool) {
+	switch t {
+	case OrgDomainValidationTypeHTTP:
+		return http_util.CheckTypeHTTP, true
+	case OrgDomainValidationTypeDNS:
+		return http_util.CheckTypeDNS, true
+	default:
+		return -1, false
+	}
+}
+
+func (t OrgDomainValidationType) IsDNS() bool {
+	return t == OrgDomainValidationTypeDNS
 }
 
 func NewOrgDomain(orgID, domain string) *OrgDomain {
@@ -16,3 +45,12 @@ func NewOrgDomain(orgID, domain string) *OrgDomain {
 func (domain *OrgDomain) IsValid() bool {
 	return domain.AggregateID != "" && domain.Domain != ""
 }
+
+func (domain *OrgDomain) GenerateVerificationCode(codeGenerator crypto.Generator) (string, error) {
+	validationCodeCrypto, validationCode, err := crypto.NewCode(codeGenerator)
+	if err != nil {
+		return "", err
+	}
+	domain.ValidationCode = validationCodeCrypto
+	return validationCode, nil
+}