1 files changed, 66 insertions, 0 deletions
diff --git a/python/samba/netcmd/validators.py b/python/samba/netcmd/validators.py
new file mode 100644
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+++ b/python/samba/netcmd/validators.py
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+# Unix SMB/CIFS implementation.
+#
+# validators
+#
+# Copyright (C) Catalyst.Net Ltd. 2023
+#
+# Written by Rob van der Linde <rob@catalyst.net.nz>
+#
+# 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 <http://www.gnu.org/licenses/>.
+#
+
+from samba.getopt import Validator, ValidationError
+
+
+class Range(Validator):
+    """Checks if the value is within range min ... max."""
+
+    def __init__(self, min=None, max=None):
+        if min is None and max is None:
+            raise ValueError("Range without a min and max doesn't make sense.")
+
+        self.min = min
+        self.max = max
+
+    def __call__(self, field, value):
+        """Check if value is within the range min ... max.
+
+        It is possible to omit min, or omit max, in which case a more
+        tailored error message is returned.
+        """
+        if self.min is not None and self.max is None:
+            if value < self.min:
+                raise ValidationError(f"{field} must be at least {self.min}")
+
+        elif self.min is None and self.max is not None:
+            if value > self.max:
+                raise ValidationError(
+                    f"{field} cannot be greater than {self.max}")
+
+        elif self.min is not None and self.max is not None:
+            if value < self.min or value > self.max:
+                raise ValidationError(
+                    f"{field} must be between {self.min} and {self.max}")
+
+
+class OneOf(Validator):
+    """Checks if the value is in a list of possible choices."""
+
+    def __init__(self, choices):
+        self.choices = sorted(choices)
+
+    def __call__(self, field, value):
+        if value not in self.choices:
+            allowed_choices = ", ".join(self.choices)
+            raise ValidationError(f"{field} must be one of: {allowed_choices}")