Added methods to give users access to a list

models/list_users_rights.go

@@ -0,0 +1,34 @@
+package models
+
+// UserRight defines the rights users can have for lists/namespaces
+type UserRight int
+
+// define unknown user right
+const (
+	UserRightUnknown = -1
+)
+
+// Enumerate all the user rights
+const (
+	// Can read lists in a User
+	UserRightRead UserRight = iota
+	// Can write tasks in a User like lists and todo tasks. Cannot create new lists.
+	UserRightWrite
+	// Can manage a list/namespace, can do everything
+	UserRightAdmin
+)
+
+func (r UserRight) isValid() error {
+	if r != UserRightAdmin && r != UserRightRead && r != UserRightWrite {
+		return ErrInvalidUserRight{r}
+	}
+
+	return nil
+}
+
+// CanCreate checks if the user can create a new user <-> list relation
+func (lu *ListUser) CanCreate(doer *User) bool {
+	// Get the list and check if the user has write access on it
+	l, _ := GetListByID(lu.ListID)
+	return l.CanWrite(doer)
+}