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# Copyright (C) 1998-2008 by the Free Software Foundation, Inc.
#
# 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 2
# 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.
from mailman.configuration import config
"""A `safe' dictionary for string interpolation."""
COMMASPACE = ', '
# XXX This module should go away.
class SafeDict(dict):
"""Dictionary which returns a default value for unknown keys.
This is used in maketext so that editing templates is a bit more robust.
"""
def __init__(self, d='', charset=None, lang=None):
super(SafeDict, self).__init__(d)
if charset:
self.cset = charset
elif lang:
self.cset = config.languages.get_charset(lang)
else:
self.cset = 'us-ascii'
def __getitem__(self, key):
try:
return super(SafeDict, self).__getitem__(key)
except KeyError:
if isinstance(key, basestring):
return '%('+key+')s'
else:
return '<Missing key: %s>' % `key`
def interpolate(self, template):
for k, v in self.items():
if isinstance(v, str):
self.__setitem__(k, unicode(v, self.cset))
return template % self
class MsgSafeDict(SafeDict):
def __init__(self, msg, d=None):
self.__msg = msg
if d is None:
d = {}
super(MsgSafeDict, self).__init__(d)
def __getitem__(self, key):
if key.startswith('msg_'):
return self.__msg.get(key[4:], 'n/a')
elif key.startswith('allmsg_'):
missing = []
all = self.__msg.get_all(key[7:], missing)
if all is missing:
return 'n/a'
return COMMASPACE.join(all)
else:
return super(MsgSafeDict, self).__getitem__(key)
def copy(self):
d = super(MsgSafeDict, self).copy()
for k in self.__msg.keys():
vals = self.__msg.get_all(k)
if len(vals) == 1:
d['msg_'+k.lower()] = vals[0]
else:
d['allmsg_'+k.lower()] = COMMASPACE.join(vals)
return d
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