fully implement acl backend and interface

internal/acl/errors.go

@@ -7,15 +7,21 @@ import "fmt"
 var (
 	ErrNotInitialized = fmt.Errorf("acl service is not initialized")
 
-	ErrRoleNotFound      = fmt.Errorf("role not found")
-	ErrRoleAlreadyExists = fmt.Errorf("role already exists")
-	ErrInvalidRoleName   = fmt.Errorf("role name is invalid")
-	ErrSameRoleName      = fmt.Errorf("role name is the same as another role")
-	ErrRoleInUse         = fmt.Errorf("role is in use")
+	ErrRoleNotFound        = fmt.Errorf("role not found")
+	ErrRoleAlreadyExists   = fmt.Errorf("role already exists")
+	ErrInvalidRoleName     = fmt.Errorf("role name is invalid")
+	ErrSameRoleName        = fmt.Errorf("role name is the same as another role")
+	ErrRoleInUse           = fmt.Errorf("role is in use")
+	ErrRoleAlreadyAssigned = fmt.Errorf("role is already assigned to user")
 
-	ErrResourceNotFound      = fmt.Errorf("resource not found")
-	ErrResourceAlreadyExists = fmt.Errorf("resource already exists")
-	ErrInvalidResourceKey    = fmt.Errorf("invalid resource key")
-	ErrResourceInUse         = fmt.Errorf("resource is in use")
-	ErrSameResourceKey       = fmt.Errorf("resource key is the same as another resource")
+	ErrResourceNotFound        = fmt.Errorf("resource not found")
+	ErrResourceAlreadyExists   = fmt.Errorf("resource already exists")
+	ErrInvalidResourceKey      = fmt.Errorf("invalid resource key")
+	ErrResourceInUse           = fmt.Errorf("resource is in use")
+	ErrSameResourceKey         = fmt.Errorf("resource key is the same as another resource")
+	ErrResourceAlreadyAssigned = fmt.Errorf("resource is already assigned to role")
+	ErrRoleResourceNotFound    = fmt.Errorf("assigned resource to role is not found")
+
+	ErrUserNotFound     = fmt.Errorf("user not found")
+	ErrUserRoleNotFound = fmt.Errorf("user role not found")
 )