improve dict-check

* Include nix development enviornment

* Obfuscate contact email addresses in shop HTML and deanonymize via JavaScript

This change addresses #1907: "hide contact e-mail address in source code
of a shop".

- Contact email addresses rendered in public-facing templates are now
obfuscated in the HTML source (e.g., replacing "@" with "[at]" and "."
with "[dot]").
- A new JavaScript file is included in the relevant templates to
automatically rewrite and restore the email address for users after the
page loads.
- This approach helps protect email addresses from basic harvesting bots
and reduces spam, while keeping them accessible and user-friendly for
human visitors.
- The obfuscation and deanonymization logic is only applied to web
templates, not to emails sent via pretix.

This implementation follows the recommendations discussed in #1907,
using a standardized, maintainable approach that’s compatible with
pretix's asset pipeline and template structure.

* Undo nix development environment for merge into main

* convert complete mailto-link to HTML entities

* remove gitignore noise

* Update .gitignore

* fix gitignore noise

* Update .gitignore

---------

Co-authored-by: Richard Schreiber <schreiber@rami.io>

src/pretix/api/serializers/order.py

@@ -19,6 +19,7 @@
 # You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
 # <https://www.gnu.org/licenses/>.
 #
+import json
 import logging
 import os
 from collections import Counter, defaultdict
@@ -1215,6 +1216,18 @@ class OrderCreateSerializer(I18nAwareModelSerializer):
             raise ValidationError('The given payment provider is not known.')
         return pp
 
+    def validate_payment_info(self, info):
+        if info:
+            try:
+                obj = json.loads(info)
+            except ValueError:
+                raise ValidationError('Payment info must be valid JSON.')
+
+            if not isinstance(obj, dict):
+                # only objects are allowed
+                raise ValidationError('Payment info must be a JSON-object.')
+        return info
+
     def validate_expires(self, expires):
         if expires < now():
             raise ValidationError('Expiration date must be in the future.')

src/pretix/base/templatetags/anonymize_email.py

@@ -0,0 +1,34 @@
+#
+# This file is part of pretix (Community Edition).
+#
+# Copyright (C) 2014-2020  Raphael Michel and contributors
+# Copyright (C) 2020-today pretix GmbH and contributors
+#
+# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
+# Public License as published by the Free Software Foundation in version 3 of the License.
+#
+# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
+# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
+# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
+# this file, see <https://pretix.eu/about/en/license>.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
+# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along with this program.  If not, see
+# <https://www.gnu.org/licenses/>.
+#
+from django import template
+from django.utils.html import mark_safe
+
+register = template.Library()
+
+
+@register.filter("anon_email")
+def anon_email(value):
+    """Replaces @ with [at] and . with [dot] for anonymization."""
+    if not isinstance(value, str):
+        return value
+    value = value.replace("@", "[at]").replace(".", "[dot]")
+    return mark_safe(''.join(['&#{0};'.format(ord(char)) for char in value]))

src/pretix/control/logdisplay.py

@@ -518,7 +518,6 @@ def pretixcontrol_orderposition_blocked_display(sender: Event, orderposition, bl
         'The order requires approval before it can continue to be processed.'),
     'pretix.event.order.approved': _('The order has been approved.'),
     'pretix.event.order.denied': _('The order has been denied (comment: "{comment}").'),
-    'pretix.event.order.vatid.validated': _('The customer VAT ID has been verified.'),
     'pretix.event.order.contact.changed': _('The email address has been changed from "{old_email}" '
                                             'to "{new_email}".'),
     'pretix.event.order.contact.confirmed': _(

src/pretix/control/views/orders.py

@@ -1641,17 +1641,9 @@ class OrderCheckVATID(OrderView):
 
             try:
                 normalized_id = validate_vat_id(ia.vat_id, str(ia.country))
-                with transaction.atomic():
-                    ia.vat_id_validated = True
-                    ia.vat_id = normalized_id
-                    ia.save()
-                    self.order.log_action(
-                        'pretix.event.order.vatid.validated',
-                        data={
-                            'vat_id': normalized_id,
-                        },
-                        user=self.request.user,
-                    )
+                ia.vat_id_validated = True
+                ia.vat_id = normalized_id
+                ia.save()
             except VATIDFinalError as e:
                 messages.error(self.request, e.message)
             except VATIDTemporaryError:

src/pretix/presale/templates/pretixpresale/event/base.html

@@ -6,6 +6,7 @@
 {% load eventurl %}
 {% load safelink %}
 {% load rich_text %}
+{% load anonymize_email %}
 {% block thetitle %}
     {% if messages %}
         {{ messages|join:" " }} :: 
@@ -219,7 +220,7 @@
 {% endblock %}
 {% block footernav %}
     {% if request.event.settings.contact_mail %}
-        <li><a href="mailto:{{ request.event.settings.contact_mail }}" target="_blank" rel="noopener">{% trans "Contact" %}</a></li>
+        <li><a href="{{ 'mailto:'|add:request.event.settings.contact_mail|anon_email }}" target="_blank" rel="noopener">{% trans "Contact" %}</a></li>
     {% endif %}
     {% if request.event.settings.privacy_url %}
         <li><a href="{% safelink request.event.settings.privacy_url %}" target="_blank" rel="noopener">{% trans "Privacy policy" %}</a></li>

src/pretix/presale/templates/pretixpresale/fragment_js.html

@@ -21,4 +21,5 @@
     <script type="text/javascript" src="{% static "pretixpresale/js/ui/cart.js" %}"></script>
     <script type="text/javascript" src="{% static "pretixpresale/js/ui/iframe.js" %}"></script>
     <script type="text/javascript" src="{% static "pretixbase/js/addressform.js" %}"></script>
+    <script type="text/javascript" src="{% static "pretixbase/js/deanonymize_email.js" %}"></script>
 {% endcompress %}

src/pretix/presale/templates/pretixpresale/organizers/base.html

@@ -5,6 +5,7 @@
 {% load thumb %}
 {% load eventurl %}
 {% load safelink %}
+{% load anonymize_email %}
 {% block thetitle %}
     {% block title %}{% endblock %}{% if url_name != "organizer.index" %} :: {% endif %}{{ organizer.name }}
 {% endblock %}
@@ -97,7 +98,7 @@
 {% endblock %}
 {% block footernav %}
     {% if not request.event and request.organizer.settings.contact_mail %}
-        <li><a href="mailto:{{ request.organizer.settings.contact_mail }}" target="_blank" rel="noopener">{% trans "Contact" %}</a></li>
+        <li><a href="{{ 'mailto:'|add:request.organizer.settings.contact_mail|anon_email }}" target="_blank" rel="noopener">{% trans "Contact" %}</a></li>
     {% endif %}
     {% if not request.event and request.organizer.settings.privacy_url %}
         <li><a href="{% safelink request.organizer.settings.privacy_url %}" target="_blank" rel="noopener">{% trans "Privacy policy" %}</a></li>

src/pretix/static/pretixbase/js/deanonymize_email.js

@@ -0,0 +1,7 @@
+document.addEventListener('DOMContentLoaded', function() {
+    document.querySelectorAll('a[href^="mailto:"]').forEach(function(link) {
+        // Replace [at] with @ and the [dot] with . in both the href and the displayed text (if needed)
+        link.href = link.href.replace('[at]', '@').replace('[dot]', '.');
+        link.textContent = link.textContent.replace('[at]', '@').replace('[dot]', '.');
+    });
+});

src/tests/api/test_order_create.py

@@ -895,6 +895,41 @@ def test_order_create_payment_info_optional(token_client, organizer, event, item
     assert json.loads(p.info) == res['payment_info']
 
 
+@pytest.mark.django_db
+def test_order_create_payment_info_valid_object(token_client, organizer, event, item, quota, question):
+    res = copy.deepcopy(ORDER_CREATE_PAYLOAD)
+    res['positions'][0]['item'] = item.pk
+    res['positions'][0]['answers'][0]['question'] = question.pk
+
+    res["payment_info"] = [{"should": "fail"}]
+    resp = token_client.post(
+        '/api/v1/organizers/{}/events/{}/orders/'.format(
+            organizer.slug, event.slug
+        ), format='json', data=res
+    )
+    assert resp.status_code == 400
+
+    res['payment_info'] = {
+        'foo': {
+            'bar': [1, 2],
+            'test': False
+        }
+    }
+    resp = token_client.post(
+        '/api/v1/organizers/{}/events/{}/orders/'.format(
+            organizer.slug, event.slug
+        ), format='json', data=res
+    )
+    assert resp.status_code == 201
+    with scopes_disabled():
+        o = Order.objects.get(code=resp.data['code'])
+
+        p = o.payments.first()
+    assert p.provider == "banktransfer"
+    assert p.amount == o.total
+    assert json.loads(p.info) == res['payment_info']
+
+
 @pytest.mark.django_db
 def test_order_create_position_secret_optional(token_client, organizer, event, item, quota, question):
     res = copy.deepcopy(ORDER_CREATE_PAYLOAD)