"""
django-helpdesk - A Django powered ticket tracker for small enterprise.
(c) Copyright 2008 Jutda. All Rights Reserved. See LICENSE for details.
lib.py - Common functions (eg multipart e-mail)
"""
chart_colours = ('80C65A', '990066', 'FF9900', '3399CC', 'BBCCED', '3399CC', 'FFCC33')
try:
from base64 import urlsafe_b64encode as b64encode
except ImportError:
from base64 import encodestring as b64encode
try:
from base64 import urlsafe_b64decode as b64decode
except ImportError:
from base64 import decodestring as b64decode
import logging
logger = logging.getLogger('helpdesk')
from django.utils.encoding import smart_str
def send_templated_mail(template_name, email_context, recipients, sender=None, bcc=None, fail_silently=False, files=None):
"""
send_templated_mail() is a warpper around Django's e-mail routines that
allows us to easily send multipart (text/plain & text/html) e-mails using
templates that are stored in the database. This lets the admin provide
both a text and a HTML template for each message.
template_name is the slug of the template to use for this message (see
models.EmailTemplate)
email_context is a dictionary to be used when rendering the template
recipients can be either a string, eg 'a@b.com', or a list of strings.
sender should contain a string, eg 'My Site <me@z.com>'. If you leave it
blank, it'll use settings.DEFAULT_FROM_EMAIL as a fallback.
bcc is an optional list of addresses that will receive this message as a
blind carbon copy.
fail_silently is passed to Django's mail routine. Set to 'True' to ignore
any errors at send time.
files can be a list of file paths to be attached, or it can be left blank.
eg ('/tmp/file1.txt', '/tmp/image.png')
"""
from django.conf import settings
from django.core.mail import EmailMultiAlternatives
from django.template import loader, Context
from helpdesk.models import EmailTemplate
import os
context = Context(email_context)
if hasattr(context['queue'], 'locale'):
locale = getattr(context['queue'], 'locale', '')
else:
locale = context['queue'].get('locale', 'en')
if not locale:
locale = 'en'
t = None
try:
t = EmailTemplate.objects.get(template_name__iexact=template_name, locale=locale)
except EmailTemplate.DoesNotExist:
pass
if not t:
try:
t = EmailTemplate.objects.get(template_name__iexact=template_name, locale__isnull=True)
except EmailTemplate.DoesNotExist:
logger.warning('template "%s" does not exist, no mail sent' %
template_name)
return # just ignore if template doesn't exist
if not sender:
sender = settings.DEFAULT_FROM_EMAIL
footer_file = os.path.join('helpdesk', locale, 'email_text_footer.txt')
text_part = loader.get_template_from_string(
"%s{%% include '%s' %%}" % (t.plain_text, footer_file)
).render(context)
email_html_base_file = os.path.join('helpdesk', locale, 'email_html_base.html')
''' keep new lines in html emails '''
from django.utils.safestring import mark_safe
if context.has_key('comment'):
html_txt = context['comment']
html_txt = html_txt.replace('\r\n', '<br>')
context['comment'] = mark_safe(html_txt)
html_part = loader.get_template_from_string(
"{%% extends '%s' %%}{%% block title %%}%s{%% endblock %%}{%% block content %%}%s{%% endblock %%}" % (email_html_base_file, t.heading, t.html)
).render(context)
subject_part = loader.get_template_from_string(
"{{ ticket.ticket }} {{ ticket.title|safe }} %s" % t.subject
).render(context)
if isinstance(recipients,(str,unicode)):
if recipients.find(','):
recipients = recipients.split(',')
elif type(recipients) != list:
recipients = [recipients,]
msg = EmailMultiAlternatives( subject_part,
text_part,
sender,
recipients,
bcc=bcc)
msg.attach_alternative(html_part, "text/html")
if files:
if type(files) != list:
files = [files,]
for file in files:
msg.attach_file(file)
return msg.send(fail_silently)
def query_to_dict(results, descriptions):
"""
Replacement method for cursor.dictfetchall() as that method no longer
exists in psycopg2, and I'm guessing in other backends too.
Converts the results of a raw SQL query into a list of dictionaries, suitable
for use in templates etc.
"""
output = []
for data in results:
row = {}
i = 0
for column in descriptions:
row[column[0]] = data[i]
i += 1
output.append(row)
return output
def apply_query(queryset, params):
"""
Apply a dict-based set of filters & parameters to a queryset.
queryset is a Django queryset, eg MyModel.objects.all() or
MyModel.objects.filter(user=request.user)
params is a dictionary that contains the following:
filtering: A dict of Django ORM filters, eg:
{'user__id__in': [1, 3, 103], 'title__contains': 'foo'}
other_filter: Another filter of some type, most likely a
set of Q() objects.
sorting: The name of the column to sort by
"""
for key in params['filtering'].keys():
filter = {key: params['filtering'][key]}
queryset = queryset.filter(**filter)
if params.get('other_filter', None):
# eg a Q() set
queryset = queryset.filter(params['other_filter'])
sorting = params.get('sorting', None)
if sorting:
sortreverse = params.get('sortreverse', None)
if sortreverse:
sorting = "-%s" % sorting
queryset = queryset.order_by(sorting)
return queryset
def safe_template_context(ticket):
"""
Return a dictionary that can be used as a template context to render
comments and other details with ticket or queue parameters. Note that
we don't just provide the Ticket & Queue objects to the template as
they could reveal confidential information. Just imagine these two options:
* {{ ticket.queue.email_box_password }}
* {{ ticket.assigned_to.password }}
Ouch!
The downside to this is that if we make changes to the model, we will also
have to update this code. Perhaps we can find a better way in the future.
"""
context = {
'queue': {},
'ticket': {},
}
queue = ticket.queue
for field in ( 'title', 'slug', 'email_address', 'from_address', 'locale'):
attr = getattr(queue, field, None)
if callable(attr):
context['queue'][field] = attr()
else:
context['queue'][field] = attr
for field in ( 'title', 'created', 'modified', 'submitter_email',
'status', 'get_status_display', 'on_hold', 'description',
'resolution', 'priority', 'get_priority_display',
'last_escalation', 'ticket', 'ticket_for_url',
'get_status', 'ticket_url', 'staff_url', '_get_assigned_to'
):
attr = getattr(ticket, field, None)
if callable(attr):
context['ticket'][field] = '%s' % attr()
else:
context['ticket'][field] = attr
context['ticket']['queue'] = context['queue']
context['ticket']['assigned_to'] = context['ticket']['_get_assigned_to']
return context
def text_is_spam(text, request):
# Based on a blog post by 'sciyoshi':
# http://sciyoshi.com/blog/2008/aug/27/using-akismet-djangos-new-comments-framework/
# This will return 'True' is the given text is deemed to be spam, or
# False if it is not spam. If it cannot be checked for some reason, we
# assume it isn't spam.
from django.contrib.sites.models import Site
from django.conf import settings
try:
from helpdesk.akismet import Akismet
except:
return False
try:
site = Site.objects.get_current()
except:
site = Site(domain='configure-django-sites.com')
ak = Akismet(
blog_url='http://%s/' % site.domain,
agent='django-helpdesk',
)
if hasattr(settings, 'TYPEPAD_ANTISPAM_API_KEY'):
ak.setAPIKey(key = settings.TYPEPAD_ANTISPAM_API_KEY)
ak.baseurl = 'api.antispam.typepad.com/1.1/'
elif hasattr(settings, 'AKISMET_API_KEY'):
ak.setAPIKey(key = settings.AKISMET_API_KEY)
else:
return False
if ak.verify_key():
ak_data = {
'user_ip': request.META.get('REMOTE_ADDR', '127.0.0.1'),
'user_agent': request.META.get('HTTP_USER_AGENT', ''),
'referrer': request.META.get('HTTP_REFERER', ''),
'comment_type': 'comment',
'comment_author': '',
}
return ak.comment_check(smart_str(text), data=ak_data)
return False