Drop wrong date manipulation.

Add dates safely using DateUtils.
Round up start_date to next midnight.
In case if after rounding this date would go higher then minimum number of day
in month set it to next month beginning date.

master/bt5/vifib_slap/SkinTemplateItem/portal_skins/vifib_slap/Person_getOpenOrderDifference.xml

@@ -52,7 +52,7 @@
             <key> <string>_body</string> </key>
             <value> <string encoding="cdata"><![CDATA[
 
-from Products.ERP5Type.DateUtils import getNumberOfDayInMonth\n
+from Products.ERP5Type.DateUtils import addToDate, getClosestDate\n
 from DateTime import DateTime\n
 \n
 person = context\n
@@ -87,29 +87,30 @@ for add_kw in add_kw_list:\n
 \n
 modify_kw_kw = {}\n
 for start_date_tuple in start_date_tuple_list:\n
+  start_date = getClosestDate(target_date=addToDate(start_date_tuple[1], to_add={\'day\': 1}), precision=\'day\')\n
+  if start_date.day() >= 29:\n
+    start_date = getClosestDate(target_date=addToDate(start_date, to_add={\'month\': 1}))\n
   if start_date_tuple[0] in hosting_subscription_mapping:\n
     line_id = hosting_subscription_mapping[start_date_tuple[0]]\n
     line = previous_open_sale_order[line_id]\n
-    if line.getStartDate() != start_date_tuple[1]:\n
+    if line.getStartDate() != start_date:\n
       modify_kw_kw[line.getAggregate(portal_type=\'Hosting Subscription\')] = {\'start_date\': start_date_tuple[1]}\n
   elif start_date_tuple[0] in add_kw_kw:\n
-    add_kw_kw[start_date_tuple[0]][\'start_date\'] = start_date_tuple[1]\n
+    add_kw_kw[start_date_tuple[0]][\'start_date\'] = start_date\n
 \n
-next_month = now + getNumberOfDayInMonth(now)\n
 if previous_open_sale_order is not None:\n
   for line in previous_open_sale_order.contentValues(portal_type=\'Open Sale Order Line\'):\n
     old_stop_date = line.getStopDate()\n
     if old_stop_date is not None:\n
       if stop_date is not None and old_stop_date < stop_date:\n
         modify_kw_kw[line.getAggregate(portal_type=\'Hosting Subscription\')][\'stop_date\'] = stop_date\n
-      else:\n
-        new_stop_date = old_stop_date + getNumberOfDayInMonth(old_stop_date)\n
+      elif old_stop_date < now:\n
+        new_stop_date = addToDate(old_stop_date, to_add={\'month\': 1})\n
         while new_stop_date < now:\n
-          new_stop_date += getNumberOfDayInMonth(new_stop_date)\n
-        if new_stop_date < next_month and new_stop_date != stop_date:\n
-          hosting_id = line.getAggregate(portal_type=\'Hosting Subscription\')\n
-          modify_kw_kw.setdefault(hosting_id, {})\n
-          modify_kw_kw[line.getAggregate(portal_type=\'Hosting Subscription\')][\'stop_date\'] = new_stop_date\n
+          new_stop_date = addToDate(new_stop_date, to_add={\'month\': 1})\n
+        hosting_id = line.getAggregate(portal_type=\'Hosting Subscription\')\n
+        modify_kw_kw.setdefault(hosting_id, {})\n
+        modify_kw_kw[line.getAggregate(portal_type=\'Hosting Subscription\')][\'stop_date\'] = new_stop_date\n
 \n
 for (key, value) in add_kw_kw.copy().iteritems():\n
   if stop_date is not None:\n
@@ -117,11 +118,10 @@ for (key, value) in add_kw_kw.copy().iteritems():\n
   else:\n
     start_date = add_kw_kw[key].get(\'start_date\')\n
     if start_date is not None:\n
-      new_stop_date = start_date + getNumberOfDayInMonth(start_date)\n
+      new_stop_date = addToDate(start_date, to_add={\'month\': 1})\n
       while new_stop_date < now:\n
-        new_stop_date += getNumberOfDayInMonth(new_stop_date)\n
-      if new_stop_date < next_month:\n
-        add_kw_kw[key][\'stop_date\'] = new_stop_date\n
+        new_stop_date = addToDate(new_stop_date, to_add={\'month\': 1})\n
+      add_kw_kw[key][\'stop_date\'] = new_stop_date\n
 \n
 remove_id_list = set()\n
 if previous_open_sale_order is not None:\n

master/bt5/vifib_slap/bt/revision

-648
\ No newline at end of file
+649
\ No newline at end of file