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6c37d73d4e
This refactor removes duplicated logic for deciding whom the messages get sent to. It also normalizes behavior ensuring that all CCed addresses are sent to in all cases that CCed individuals should be notified.
115 lines
4.2 KiB
Python
115 lines
4.2 KiB
Python
import os
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import mimetypes
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import logging
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from smtplib import SMTPException
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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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"""
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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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"""
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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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locale = context['queue'].get('locale') or HELPDESK_EMAIL_FALLBACK_LOCALE
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try:
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t = EmailTemplate.objects.get(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(template_name__iexact=template_name, locale__isnull=True)
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except EmailTemplate.DoesNotExist:
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logger.warning('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{%% include '%s' %%}" % (t.plain_text, footer_file)
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).render(context)
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email_html_base_file = os.path.join('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(context['comment'].replace('\r\n', '<br>'))
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html_part = from_string(
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"{%% extends '%s' %%}{%% block title %%}"
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"%s"
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"{%% endblock %%}{%% 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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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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mime = mimetypes.guess_type(filename)
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if mime[0] is not None and mime[0] == "text/plain":
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with open(filefield.path, 'r') as attachedfile:
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content = attachedfile.read()
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msg.attach(filename, content)
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else:
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msg.attach_file(filefield.path)
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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('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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