Fixed #46 -- Added a plugin to send out emails

src/pretix/base/plugins.py

@@ -9,6 +9,7 @@ from django.apps import apps
 class PluginType(Enum):
     RESTRICTION = 1
     PAYMENT = 2
+    ADMINFEATURE = 3
 
 
 def get_all_plugins() -> "List[class]":

src/pretix/base/services/mail.py

@@ -1,22 +1,27 @@
 import logging
 from django.conf import settings
 from django.core.mail import EmailMessage
+from django.core.urlresolvers import reverse
 from django.template.loader import get_template
 from django.utils import translation
+from django.utils.translation import ugettext as _
 
+from pretix.base.i18n import LazyI18nString
 from pretix.base.models import User, Event
+from pretix.helpers.urls import build_absolute_uri
 
 logger = logging.getLogger('pretix.base.mail')
 
 
-def mail(user: User, subject: str, template: str, context: dict, event: Event=None):
+def mail(user: User, subject: str, template: str, context: dict=None, event: Event=None):
     """
     Sends out an email to a user.
 
     :param user: The user this should be sent to.
     :param subject: The e-mail subject. Should be localized.
     :param template: The filename of a template to be used. It will
-                     be rendered with the recipient's locale.
+                     be rendered with the recipient's locale. Alternatively, you
+                     can pass a LazyI18nString and leave ``context`` empty
     :param context: The context for rendering the template.
     :param event: The event, used for determining the sender of the e-mail
 
@@ -31,8 +36,11 @@ def mail(user: User, subject: str, template: str, context: dict, event: Event=No
     _lng = translation.get_language()
     translation.activate(user.locale or settings.LANGUAGE_CODE)
 
-    tpl = get_template(template)
-    body = tpl.render(context)
+    if isinstance(template, LazyI18nString):
+        body = str(template)
+    else:
+        tpl = get_template(template)
+        body = tpl.render(context)
 
     sender = event.settings.get('mail_from') if event else settings.MAIL_FROM
 
@@ -41,6 +49,23 @@ def mail(user: User, subject: str, template: str, context: dict, event: Event=No
     if prefix:
         subject = "[%s] %s" % (prefix, subject)
 
+    body += "\r\n\r\n----\r\n"
+    body += _(
+        "You are receiving this e-mail because you placed an order for %s." % event.name
+    )
+    body += "\r\n"
+    body += _(
+        "You can view all of your orders at the following URL:"
+    )
+    body += "\r\n"
+    body += build_absolute_uri(
+        'presale:event.orders', kwargs={
+            'event': event.slug,
+            'organizer': event.organizer.slug
+        }
+    )
+    body += "\r\n"
+
     email = EmailMessage(
         subject, body, sender,
         to=[user.email]

src/pretix/plugins/sendmail/__init__.py

@@ -0,0 +1,22 @@
+from django.apps import AppConfig
+from django.utils.translation import ugettext_lazy as _
+from pretix.base.plugins import PluginType
+
+
+class SendMailApp(AppConfig):
+    name = 'pretix.plugins.sendmail'
+    verbose_name = _("Send out emails")
+
+    class PretixPluginMeta:
+        type = PluginType.ADMINFEATURE
+        name = _("Send out emails")
+        author = _("the pretix team")
+        version = '1.0.0'
+        description = _("This plugin allows you to send out emails " +
+                        "to all your customers.")
+
+    def ready(self):
+        from . import signals  # NOQA
+
+
+default_app_config = 'pretix.plugins.sendmail.SendMailApp'

src/pretix/plugins/sendmail/forms.py

@@ -0,0 +1,25 @@
+from django import forms
+from django.utils.translation import ugettext_lazy as _
+from pretix.base.i18n import I18nFormField, I18nTextarea, I18nTextInput
+from pretix.base.models import Order
+
+
+class MailForm(forms.Form):
+    sendto = forms.MultipleChoiceField(
+        label=_("Send to"), widget=forms.CheckboxSelectMultiple,
+        choices=Order.STATUS_CHOICE
+    )
+    subject = forms.CharField(label=_("Subject"))
+    message = forms.CharField(label=_("Message"))
+
+    def __init__(self, *args, **kwargs):
+        event = kwargs.pop('event')
+        super().__init__(*args, **kwargs)
+        self.fields['subject'] = I18nFormField(
+            widget=I18nTextInput, required=True,
+            langcodes=event.settings.get('locales')
+        )
+        self.fields['message'] = I18nFormField(
+            widget=I18nTextarea, required=True,
+            langcodes=event.settings.get('locales')
+        )

src/pretix/plugins/sendmail/signals.py

@@ -0,0 +1,23 @@
+from django.core.urlresolvers import reverse, resolve
+from django.dispatch import receiver
+from django.utils.translation import ugettext_lazy as _
+
+from pretix.control.signals import nav_event
+
+
+@receiver(nav_event)
+def control_nav_import(sender, request=None, **kwargs):
+    url = resolve(request.path_info)
+    if not request.eventperm.can_change_orders:
+        return []
+    return [
+        {
+            'label': _('Send out emails'),
+            'url': reverse('plugins:sendmail:send', kwargs={
+                'event': request.event.slug,
+                'organizer': request.event.organizer.slug,
+            }),
+            'active': (url.namespace == 'plugins:sendmail' and url.url_name == 'send'),
+            'icon': 'envelope',
+        }
+    ]

src/pretix/plugins/sendmail/templates/pretixplugins/sendmail/send_form.html

@@ -0,0 +1,21 @@
+{% extends "pretixcontrol/event/base.html" %}
+{% load i18n %}
+{% load bootstrap3 %}
+{% block title %}{% trans "Send out emails" %}{% endblock %}
+{% block content %}
+    <h1>{% trans "Send out emails" %}</h1>
+    {% block inner %}
+        <form class="form-horizontal" method="post" action="">
+            {% csrf_token %}
+            {% bootstrap_field form.sendto layout='horizontal' %}
+            {% bootstrap_field form.subject layout='horizontal' %}
+            {% bootstrap_field form.message layout='horizontal' %}
+            <div class="form-group submit-group">
+                <button type="submit" class="btn btn-primary btn-save">
+                    {% trans "Send" %}
+                </button>
+            </div>
+        </form>
+    {% endblock %}
+{% endblock %}
+

src/pretix/plugins/sendmail/urls.py

@@ -0,0 +1,9 @@
+from django.conf.urls import url
+
+from . import views
+
+
+urlpatterns = [
+    url(r'^control/event/(?P<organizer>[^/]+)/(?P<event>[^/]+)/sendmail/', views.SenderView.as_view(),
+        name='send'),
+]

src/pretix/plugins/sendmail/views.py

@@ -0,0 +1,43 @@
+import logging
+from django.contrib import messages
+from django.shortcuts import redirect
+from django.utils.translation import ugettext_lazy as _
+from django.views.generic import FormView
+
+from pretix.base.models import Order
+from pretix.base.services.mail import mail
+from pretix.control.permissions import EventPermissionRequiredMixin
+
+from . import forms
+
+
+logger = logging.getLogger('pretix.plugins.sendmail')
+
+
+class SenderView(EventPermissionRequiredMixin, FormView):
+    template_name = 'pretixplugins/sendmail/send_form.html'
+    permission = 'can_change_orders'
+    form_class = forms.MailForm
+
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        kwargs['event'] = self.request.event
+        return kwargs
+
+    def form_valid(self, form):
+        orders = Order.objects.current.filter(
+            event=self.request.event, status__in=form.cleaned_data['sendto']
+        ).select_related("user")
+        users = set([o.user for o in orders])
+
+        for u in users:
+            mail(u, form.cleaned_data['subject'], form.cleaned_data['message'],
+                 None, self.request.event)
+
+        messages.success(self.request, _('Your message will be sent to the selected users.'))
+
+        return redirect(
+            'plugins:sendmail:send',
+            event=self.request.event.slug,
+            organizer=self.request.event.organizer.slug
+        )

src/pretix/settings.py

@@ -131,6 +131,7 @@ INSTALLED_APPS = (
     'pretix.plugins.stripe',
     'pretix.plugins.paypal',
     'pretix.plugins.ticketoutputpdf',
+    'pretix.plugins.sendmail',
 )
 
 MIDDLEWARE_CLASSES = (