Rights performance improvements for lists and namespaces (#54)

pkg/models/rights.go

@@ -0,0 +1,43 @@
+//  Vikunja is a todo-list application to facilitate your life.
+//  Copyright 2019 Vikunja and contributors. All rights reserved.
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package models
+
+// Right defines the rights users/teams can have for lists/namespaces
+type Right int
+
+// define unknown right
+const (
+	RightUnknown = -1
+)
+
+// Enumerate all the team rights
+const (
+	// Can read lists in a
+	RightRead Right = iota
+	// Can write in a like lists and todo tasks. Cannot create new lists.
+	RightWrite
+	// Can manage a list/namespace, can do everything
+	RightAdmin
+)
+
+func (r Right) isValid() error {
+	if r != RightAdmin && r != RightRead && r != RightWrite {
+		return ErrInvalidRight{r}
+	}
+
+	return nil
+}