basicly implement acl crud ops with roles and resources

internal/acl/errors.go

@@ -0,0 +1,21 @@
+package acl
+
+// TODO: add more specific errors
+
+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")
+
+	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")
+)