restructure and process additions and deleteions of relationships, roles and memberships

internal/service/service.go

@@ -13,20 +13,39 @@ import (
 
 const (
 	// TypeOrganization defines the organization type.
-	TypeOrganization = "organization"
+	TypeOrganization ObjectType = "organization"
 
 	// TypeProject defines the project type.
-	TypeProject = "project"
+	TypeProject ObjectType = "project"
 
 	// TypeUser defines the user type.
-	TypeUser = "user"
+	TypeUser ObjectType = "user"
 )
 
 // DefaultPrefixMap is the default id prefix to type relationship.
-var DefaultPrefixMap = map[string]string{
-	"metlorg": TypeOrganization,
-	"metlprj": TypeProject,
-	"metlusr": TypeUser,
+var DefaultPrefixMap = map[string]ObjectType{
+	TypeOrganization.Prefix(): TypeOrganization,
+	TypeProject.Prefix():      TypeProject,
+	TypeUser.Prefix():         TypeUser,
+}
+
+type ObjectType string
+
+func (t ObjectType) Prefix() string {
+	switch t {
+	case TypeOrganization:
+		return "metlorg"
+	case TypeProject:
+		return "metlprj"
+	case TypeUser:
+		return "metlusr"
+	default:
+		return ""
+	}
+}
+
+func (t ObjectType) String() string {
+	return string(t)
 }
 
 // Service defines a bridge service methods
@@ -63,7 +82,7 @@ type service struct {
 	publisher   *events.Publisher
 	metal       *metal.Client
 	perms       *permissions.Client
-	idPrefixMap map[string]string
+	idPrefixMap map[string]ObjectType
 
 	rootResource prefixedID
 	roles        map[string][]string
@@ -82,7 +101,7 @@ func New(publisher *events.Publisher, metal *metal.Client, perms *permissions.Cl
 		publisher:   publisher,
 		metal:       metal,
 		perms:       perms,
-		idPrefixMap: make(map[string]string),
+		idPrefixMap: make(map[string]ObjectType),
 	}
 
 	for _, opt := range options {