From 4b0a7ae59f46bd178745e97e6b69dc240c5761c7 Mon Sep 17 00:00:00 2001
From: Radek Czajka <radekczajka@nowoczesnapolska.org.pl>
Date: Mon, 10 Feb 2014 14:43:28 +0100
Subject: [PATCH] Fixes #3312: Sanitize payment titles.

---
 apps/funding/templatetags/funding_tags.py |  3 ++-
 apps/funding/utils.py                     | 23 +++++++++++++++++++++++
 wolnelektury/settings/contrib.py          |  2 ++
 3 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 apps/funding/utils.py

diff --git a/apps/funding/templatetags/funding_tags.py b/apps/funding/templatetags/funding_tags.py
index 5c6544a8f..f59a79619 100755
--- a/apps/funding/templatetags/funding_tags.py
+++ b/apps/funding/templatetags/funding_tags.py
@@ -1,5 +1,6 @@
 from django import template
 from ..models import Offer
+from ..utils import sanitize_payment_title
 
 register = template.Library()
 
@@ -43,4 +44,4 @@ def offer_status_more(offer):
         'offer': offer,
     }
 
-
+register.filter(sanitize_payment_title)
diff --git a/apps/funding/utils.py b/apps/funding/utils.py
new file mode 100644
index 000000000..2b5f58f4d
--- /dev/null
+++ b/apps/funding/utils.py
@@ -0,0 +1,23 @@
+# -*- coding: utf-8
+import re
+import string
+from fnpdjango.utils.text.slughifi import char_map
+
+# PayU chokes on non-Polish diacritics.
+# Punctuation is handled correctly and escaped as needed,
+# with the notable exception of backslash.
+sane_in_payu_title = re.escape(
+    string.uppercase +
+    string.lowercase + 
+    u'ąćęłńóśźżĄĆĘŁŃÓŚŹŻ' + 
+    string.digits +
+    ' ' +
+    "".join(set(string.punctuation) - set('\\'))
+)
+
+def replace_char(m):
+    char = m.group()
+    return char_map.get(char, '')
+
+def sanitize_payment_title(value):
+    return re.sub('[^%s]{1}' % sane_in_payu_title, replace_char, unicode(value))
diff --git a/wolnelektury/settings/contrib.py b/wolnelektury/settings/contrib.py
index 6e3e535d5..04b0bd944 100644
--- a/wolnelektury/settings/contrib.py
+++ b/wolnelektury/settings/contrib.py
@@ -7,3 +7,5 @@ SOUTH_MIGRATION_MODULES = {
     'getpaid' : 'wolnelektury.migrations.getpaid',
     'payu': 'wolnelektury.migrations.getpaid_payu',
 }
+
+GETPAID_ORDER_DESCRIPTION = "{% load funding_tags %}{{ order|sanitize_payment_title }}"
-- 
2.20.1