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from django import template
register = template.Library()
class BuildQueryStringNode(template.Node):
def __init__(self, sortfield):
self.sortfield = sortfield
def render(self, context):
qs = context['querystring'].copy()
if qs.has_key('sort') and qs['sort'] == self.sortfield:
qs['sort'] = '-' + self.sortfield
else:
qs['sort'] = self.sortfield
return '?' + qs.urlencode()
@register.tag(name='buildsortqs')
def do_buildsortqs(parser, token):
try:
tagname, sortfield = token.split_contents()
except ValueError:
raise template.TemplateSyntaxError, "%r tag requires a single argument" % tagname
if not (sortfield[0] == sortfield[-1] and sortfield[0] in ('"', "'")):
raise template.TemplateSyntaxError, "%r tag's argument should be in quotes" % tagname
return BuildQueryStringNode(sortfield[1:-1])
@register.filter(name='space2br')
def space2br(value):
return value.replace(' ', '<br />')
# vim: set ts=4 sw=4 et:
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