# HG changeset patch
# User Sverre Rabbelier <srabbelier@gmail.com>
# Date 1227912521 0
# Node ID 988f8a8cd6de5de44a319be5fe02d5347d9460df
# Parent  f6abfcbff3a43e325f81560ab116bb3809f5973b
Added a cleaning module

This module is the start of a (hopefully more generic) set of
cleaning functions that can be used in the GAE forms.

Patch by: Sverre Rabbelier

diff -r f6abfcbff3a4 -r 988f8a8cd6de app/soc/logic/cleaning.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/soc/logic/cleaning.py	Fri Nov 28 22:48:41 2008 +0000
@@ -0,0 +1,67 @@
+#!/usr/bin/python2.5
+#
+# Copyright 2008 the Melange authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Generic cleaning methods
+"""
+
+__authors__ = [
+    '"Todd Larsen" <tlarsen@google.com>',
+    '"Sverre Rabbelier" <sverre@rabbelier.nl>',
+    ]
+
+
+from django import forms
+
+from soc.logic import validate
+
+
+def clean_new_link_id(logic):
+  """Clean method for new link_id's
+
+  Returns a clean method that checks if the specified link_id is
+  in the proper format, and verifies that the link_id is not already in
+  in use by another entity of the same type.
+  """
+
+  def wrapped(self):
+    link_id = self.cleaned_data.get('link_id')
+    if not validate.isLinkIdFormatValid(link_id):
+      raise forms.ValidationError("This link ID is in wrong format.")
+    if logic.getFromFields(link_id=link_id):
+      raise forms.ValidationError("This link ID is already in use.")
+    return link_id
+
+  return wrapped
+
+
+def clean_link_id(self):
+  link_id = self.cleaned_data.get('link_id')
+  if not validate.isLinkIdFormatValid(link_id):
+    raise forms.ValidationError("This link ID is in wrong format.")
+  return link_id
+
+
+def clean_feed_url(self):
+  feed_url = self.cleaned_data.get('feed_url')
+
+  if feed_url == '':
+    # feed url not supplied (which is OK), so do not try to validate it
+    return None
+  
+  if not validate.isFeedURLValid(feed_url):
+    raise forms.ValidationError('This URL is not a valid ATOM or RSS feed.')
+
+  return feed_url