* Issue #24: Add ability to localise queues so that the templates used

by those queues are in languages that differ from the installation 
  langugage. 

  To utilise this, call your templates 'zz:templatename' where 'zz' is the 
  language code and 'templatename' is the name used by the Helpdesk when 
  sending e-mails.

  Thanks to Paul Boehm for the submission.

lib.py

@@ -49,20 +49,39 @@ def send_templated_mail(template_name, email_context, recipients, sender=None, b
     from django.template import loader, Context
 
     from helpdesk.models import EmailTemplate
+    import os
 
-    t = EmailTemplate.objects.get(template_name__iexact=template_name)
+    context = Context(email_context)
+    locale = getattr(context['queue'], 'locale', 'en')
+
+    if locale != 'en':
+        template_localized = template_name + ':' + locale
+    else:
+        template_localized = None
+
+    got_template = True
+    if template_localized:
+        try:
+            t = EmailTemplate.objects.get(templaet_name__iexact=template_localized)
+        except EmailTemplate.DoesNotExist:
+            got_template = False
+    
+    if not got_template:
+        t = EmailTemplate.objects.get(template_name__iexact=template_name)
 
     if not sender:
         sender = settings.DEFAULT_FROM_EMAIL
 
-    context = Context(email_context)
+    footer_file = os.path.join('helpdesk', locale, 'email_text_footer.txt')
 
     text_part = loader.get_template_from_string(
-        "%s{%% include 'helpdesk/email_text_footer.txt' %%}" % t.plain_text
+        "%s{%% include '%s' %%}" % (t.plain_text, footer_file)
         ).render(context)
 
+    email_html_base_file = os.path.join('helpdesk', locale, 'email_html_base.html')
+
     html_part = loader.get_template_from_string(
-        "{%% extends 'helpdesk/email_html_base.html' %%}{%% block title %%}%s{%% endblock %%}{%% block content %%}%s{%% endblock %%}" % (t.heading, t.html)
+        "{%% 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(

models.py

@@ -45,6 +45,14 @@ class Queue(models.Model):
             'address for that mailbox.'),
         )
 
+    locale = models.CharField(
+        _('Locale'),
+        max_length=10,
+        blank=True,
+        null=True,
+        help_text=_('Locale of this queue. All correspondence in this queue will be in this language.'),
+        )
+
     allow_public_submission = models.BooleanField(
         _('Allow Public Submission?'),
         blank=True,

templates/helpdesk/de/email_html_base.html

@@ -0,0 +1,9 @@
+<h1 style='font-family: "Trebuchet MS", Arial, sans-serif; font-size: 14pt; color: #6593C0'>{% block header %}Helpdesk{% endblock %}</h1>
+
+{% block content %}{% endblock %}
+
+<p style='font-family: "Trebuchet MS", Arial, sans-serif; font-size: 11pt;'>Beste Gr&uuml;&szlig;e,</p>
+
+<p style='font-family: "Trebuchet MS", Arial, sans-serif; font-size: 11pt;'><b>{{ queue.title }}</b>{% if queue.email_address %}<br><a href='mailto:{{ queue.email_address }}'>{{ queue.email_address }}</a>{% endif %}</p>
+    
+<p style='font-family: "Trebuchet MS", Arial, sans-serif; font-size: 9pt; color: #808080;' color='#808080'>Diese E-Mail wurde, im Einklang mit unserer Privacy-Policy an Dich als Benutzer unseres Support-Dienstes gesendet. Bitte teil uns mit falls du denkst, da&szlig; du diese E-Mail nicht bekommen h&auml;ttest sollen.</p>

templates/helpdesk/de/email_text_footer.txt

@@ -0,0 +1,6 @@
+Beste GrüÃe,
+
+{{ queue.title }}{% if queue.email_address %}
+{{ queue.email_address }}{% endif %}
+    
+Diese E-Mail wurde, im Einklang mit unserer Privacy-Policy an Dich als Benutzer unseres Support-Dienstes gesendet. Bitte teil uns mit falls du denkst, daà du diese E-Mail nicht bekommen hättest sollen.