forked from extern/django-helpdesk
125 lines
4.3 KiB
Python
125 lines
4.3 KiB
Python
import os
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import logging
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from smtplib import SMTPException
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from django.conf import settings
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from django.utils.safestring import mark_safe
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logger = logging.getLogger('helpdesk')
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def send_templated_mail(template_name,
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context,
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recipients,
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sender=None,
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bcc=None,
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fail_silently=False,
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files=None,
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extra_headers=None):
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"""
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send_templated_mail() is a wrapper around Django's e-mail routines that
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allows us to easily send multipart (text/plain & text/html) e-mails using
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templates that are stored in the database. This lets the admin provide
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both a text and a HTML template for each message.
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template_name is the slug of the template to use for this message (see
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models.EmailTemplate)
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context is a dictionary to be used when rendering the template
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recipients can be either a string, eg 'a@b.com', or a list of strings.
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sender should contain a string, eg 'My Site <me@z.com>'. If you leave it
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blank, it'll use settings.DEFAULT_FROM_EMAIL as a fallback.
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bcc is an optional list of addresses that will receive this message as a
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blind carbon copy.
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fail_silently is passed to Django's mail routine. Set to 'True' to ignore
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any errors at send time.
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files can be a list of tuples. Each tuple should be a filename to attach,
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along with the File objects to be read. files can be blank.
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extra_headers is a dictionary of extra email headers, needed to process
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email replies and keep proper threading.
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"""
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from django.core.mail import EmailMultiAlternatives
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from django.template import engines
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from_string = engines['django'].from_string
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from helpdesk.models import EmailTemplate
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from helpdesk.settings import HELPDESK_EMAIL_SUBJECT_TEMPLATE, \
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HELPDESK_EMAIL_FALLBACK_LOCALE
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headers = extra_headers or {}
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locale = context['queue'].get('locale') or HELPDESK_EMAIL_FALLBACK_LOCALE
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try:
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t = EmailTemplate.objects.get(
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template_name__iexact=template_name, locale=locale)
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except EmailTemplate.DoesNotExist:
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try:
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t = EmailTemplate.objects.get(
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template_name__iexact=template_name, locale__isnull=True)
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except EmailTemplate.DoesNotExist:
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logger.warning(
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'template "%s" does not exist, no mail sent', template_name)
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return # just ignore if template doesn't exist
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subject_part = from_string(
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HELPDESK_EMAIL_SUBJECT_TEMPLATE % {
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"subject": t.subject
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}).render(context).replace('\n', '').replace('\r', '')
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footer_file = os.path.join('helpdesk', locale, 'email_text_footer.txt')
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text_part = from_string(
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"%s\n\n{%% include '%s' %%}" % (t.plain_text, footer_file)
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).render(context)
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email_html_base_file = os.path.join(
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'helpdesk', locale, 'email_html_base.html')
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# keep new lines in html emails
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if 'comment' in context:
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context['comment'] = mark_safe(
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context['comment'].replace('\r\n', '<br>'))
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html_part = from_string(
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"{%% extends '%s' %%}"
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"{%% block title %%}%s{%% endblock %%}"
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"{%% block content %%}%s{%% endblock %%}" %
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(email_html_base_file, t.heading, t.html)
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).render(context)
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if isinstance(recipients, str):
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if recipients.find(','):
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recipients = recipients.split(',')
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elif type(recipients) != list:
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recipients = [recipients]
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msg = EmailMultiAlternatives(subject_part, text_part,
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sender or settings.DEFAULT_FROM_EMAIL,
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recipients, bcc=bcc,
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headers=headers)
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msg.attach_alternative(html_part, "text/html")
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if files:
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for filename, filefield in files:
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filefield.open('rb')
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content = filefield.read()
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msg.attach(filename, content)
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filefield.close()
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logger.debug('Sending email to: {!r}'.format(recipients))
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try:
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return msg.send()
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except SMTPException as e:
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logger.exception(
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'SMTPException raised while sending email to {}'.format(recipients))
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if not fail_silently:
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raise e
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return 0
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