Allow to disable some e-mails depending on sales channel (#1726)

Co-authored-by: Raphael Michel <michel@rami.io>

src/pretix/control/forms/event.py

@@ -1,5 +1,3 @@
-from urllib.parse import urlencode, urlparse
-
 from django import forms
 from django.conf import settings
 from django.core.exceptions import ValidationError
@@ -17,6 +15,7 @@ from i18nfield.forms import (
     I18nForm, I18nFormField, I18nFormSetMixin, I18nTextarea, I18nTextInput,
 )
 from pytz import common_timezones, timezone
+from urllib.parse import urlencode, urlparse
 
 from pretix.base.channels import get_all_sales_channels
 from pretix.base.email import get_available_placeholders
@@ -750,6 +749,11 @@ def multimail_validate(val):
     return s
 
 
+def contains_web_channel_validate(val):
+    if "web" not in val:
+        raise ValidationError(_("The online shop must be selected to receive these emails."))
+
+
 class MailSettingsForm(SettingsForm):
     auto_fields = [
         'mail_prefix',
@@ -758,6 +762,27 @@ class MailSettingsForm(SettingsForm):
         'mail_attach_ical',
     ]
 
+    mail_sales_channel_placed_paid = forms.MultipleChoiceField(
+        choices=lambda: [(ident, sc.verbose_name) for ident, sc in get_all_sales_channels().items()],
+        label=_('Sales channels for checkout emails'),
+        help_text=_('The order placed and paid emails will only be send to orders from these sales channels. '
+                    'The online shop must be enabled.'),
+        widget=forms.CheckboxSelectMultiple(
+            attrs={'class': 'scrolling-multiple-choice'}
+        ),
+        validators=[contains_web_channel_validate],
+    )
+
+    mail_sales_channel_download_reminder = forms.MultipleChoiceField(
+        choices=lambda: [(ident, sc.verbose_name) for ident, sc in get_all_sales_channels().items()],
+        label=_('Sales channels'),
+        help_text=_('This email will only be send to orders from these sales channels. The online shop must be enabled.'),
+        widget=forms.CheckboxSelectMultiple(
+            attrs={'class': 'scrolling-multiple-choice'}
+        ),
+        validators=[contains_web_channel_validate],
+    )
+
     mail_bcc = forms.CharField(
         label=_("Bcc address"),
         help_text=_("All emails will be sent to this address as a Bcc copy"),