Add check-in simulator (#3380)

src/pretix/api/views/checkin.py

@@ -396,7 +396,7 @@ def _checkin_list_position_queryset(checkinlists, ignore_status=False, ignore_pr
 
 def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force, checkin_type, ignore_unpaid, nonce,
                     untrusted_input, user, auth, expand, pdf_data, request, questions_supported, canceled_supported,
-                    source_type='barcode', legacy_url_support=False):
+                    source_type='barcode', legacy_url_support=False, simulate=False):
     if not checkinlists:
         raise ValidationError('No check-in list passed.')
 
@@ -433,6 +433,8 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
     )
     raw_barcode_for_checkin = None
     from_revoked_secret = False
+    if simulate:
+        common_checkin_args['__fake_arg_to_prevent_this_from_being_saved'] = True
 
     # 1. Gather a list of positions that could be the one we looking for, either from their ID, secret or
     #    parent secret
@@ -472,13 +474,14 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
             revoked_matches = list(
                 RevokedTicketSecret.objects.filter(event_id__in=list_by_event.keys(), secret=raw_barcode))
             if len(revoked_matches) == 0:
-                checkinlists[0].event.log_action('pretix.event.checkin.unknown', data={
+                if not simulate:
-                    'datetime': datetime,
+                    checkinlists[0].event.log_action('pretix.event.checkin.unknown', data={
-                    'type': checkin_type,
+                        'datetime': datetime,
-                    'list': checkinlists[0].pk,
+                        'type': checkin_type,
-                    'barcode': raw_barcode,
+                        'list': checkinlists[0].pk,
-                    'searched_lists': [cl.pk for cl in checkinlists]
+                        'barcode': raw_barcode,
-                }, user=user, auth=auth)
+                        'searched_lists': [cl.pk for cl in checkinlists]
+                    }, user=user, auth=auth)
 
                 for cl in checkinlists:
                     for k, s in cl.event.ticket_secret_generators.items():
@@ -492,12 +495,13 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                         except:
                             pass
 
-                Checkin.objects.create(
+                if not simulate:
-                    position=None,
+                    Checkin.objects.create(
-                    successful=False,
+                        position=None,
-                    error_reason=Checkin.REASON_INVALID,
+                        successful=False,
-                    **common_checkin_args,
+                        error_reason=Checkin.REASON_INVALID,
-                )
+                        **common_checkin_args,
+                    )
 
                 if force and legacy_url_support and isinstance(auth, Device):
                     # There was a bug in libpretixsync: If you scanned a ticket in offline mode that was
@@ -539,19 +543,20 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                 from_revoked_secret = True
             else:
                 op = revoked_matches[0].position
-                op.order.log_action('pretix.event.checkin.revoked', data={
+                if not simulate:
-                    'datetime': datetime,
+                    op.order.log_action('pretix.event.checkin.revoked', data={
-                    'type': checkin_type,
+                        'datetime': datetime,
-                    'list': list_by_event[revoked_matches[0].event_id].pk,
+                        'type': checkin_type,
-                    'barcode': raw_barcode
+                        'list': list_by_event[revoked_matches[0].event_id].pk,
-                }, user=user, auth=auth)
+                        'barcode': raw_barcode
-                common_checkin_args['list'] = list_by_event[revoked_matches[0].event_id]
+                    }, user=user, auth=auth)
-                Checkin.objects.create(
+                    common_checkin_args['list'] = list_by_event[revoked_matches[0].event_id]
-                    position=op,
+                    Checkin.objects.create(
-                    successful=False,
+                        position=op,
-                    error_reason=Checkin.REASON_REVOKED,
+                        successful=False,
-                    **common_checkin_args
+                        error_reason=Checkin.REASON_REVOKED,
-                )
+                        **common_checkin_args
+                    )
                 return Response({
                     'status': 'error',
                     'reason': Checkin.REASON_REVOKED,
@@ -588,24 +593,25 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
             # We choose the first match (regardless of product) for the logging since it's most likely to be the
             # base product according to our order_by above.
             op = op_candidates[0]
-            op.order.log_action('pretix.event.checkin.denied', data={
+            if not simulate:
-                'position': op.id,
+                op.order.log_action('pretix.event.checkin.denied', data={
-                'positionid': op.positionid,
+                    'position': op.id,
-                'errorcode': Checkin.REASON_AMBIGUOUS,
+                    'positionid': op.positionid,
-                'reason_explanation': None,
+                    'errorcode': Checkin.REASON_AMBIGUOUS,
-                'force': force,
+                    'reason_explanation': None,
-                'datetime': datetime,
+                    'force': force,
-                'type': checkin_type,
+                    'datetime': datetime,
-                'list': list_by_event[op.order.event_id].pk,
+                    'type': checkin_type,
-            }, user=user, auth=auth)
+                    'list': list_by_event[op.order.event_id].pk,
-            common_checkin_args['list'] = list_by_event[op.order.event_id]
+                }, user=user, auth=auth)
-            Checkin.objects.create(
+                common_checkin_args['list'] = list_by_event[op.order.event_id]
-                position=op,
+                Checkin.objects.create(
-                successful=False,
+                    position=op,
-                error_reason=Checkin.REASON_AMBIGUOUS,
+                    successful=False,
-                error_explanation=None,
+                    error_reason=Checkin.REASON_AMBIGUOUS,
-                **common_checkin_args,
+                    error_explanation=None,
-            )
+                    **common_checkin_args,
+                )
             return Response({
                 'status': 'error',
                 'reason': Checkin.REASON_AMBIGUOUS,
@@ -652,6 +658,7 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                 raw_barcode=raw_barcode_for_checkin,
                 raw_source_type=source_type,
                 from_revoked_secret=from_revoked_secret,
+                simulate=simulate,
             )
         except RequiredQuestionsError as e:
             return Response({
@@ -664,23 +671,24 @@ def _redeem_process(*, checkinlists, raw_barcode, answers_data, datetime, force,
                 'list': MiniCheckinListSerializer(list_by_event[op.order.event_id]).data,
             }, status=400)
         except CheckInError as e:
-            op.order.log_action('pretix.event.checkin.denied', data={
+            if not simulate:
-                'position': op.id,
+                op.order.log_action('pretix.event.checkin.denied', data={
-                'positionid': op.positionid,
+                    'position': op.id,
-                'errorcode': e.code,
+                    'positionid': op.positionid,
-                'reason_explanation': e.reason,
+                    'errorcode': e.code,
-                'force': force,
+                    'reason_explanation': e.reason,
-                'datetime': datetime,
+                    'force': force,
-                'type': checkin_type,
+                    'datetime': datetime,
-                'list': list_by_event[op.order.event_id].pk,
+                    'type': checkin_type,
-            }, user=user, auth=auth)
+                    'list': list_by_event[op.order.event_id].pk,
-            Checkin.objects.create(
+                }, user=user, auth=auth)
-                position=op,
+                Checkin.objects.create(
-                successful=False,
+                    position=op,
-                error_reason=e.code,
+                    successful=False,
-                error_explanation=e.reason,
+                    error_reason=e.code,
-                **common_checkin_args,
+                    error_explanation=e.reason,
-            )
+                    **common_checkin_args,
+                )
             return Response({
                 'status': 'error',
                 'reason': e.code,

src/pretix/base/services/checkin.py

@@ -53,7 +53,8 @@ from django.utils.translation import gettext as _
 from django_scopes import scope, scopes_disabled
 
 from pretix.base.models import (
-    Checkin, CheckinList, Device, Order, OrderPosition, QuestionOption,
+    Checkin, CheckinList, Device, Event, ItemVariation, Order, OrderPosition,
+    QuestionOption,
 )
 from pretix.base.signals import checkin_created, order_placed, periodic_task
 from pretix.helpers import OF_SELF
@@ -65,12 +66,13 @@ from pretix.helpers.jsonlogic_query import (
 )
 
 
-def _build_time(t=None, value=None, ev=None):
+def _build_time(t=None, value=None, ev=None, now_dt=None):
+    now_dt = now_dt or now()
     if t == "custom":
         return dateutil.parser.parse(value)
     elif t == "customtime":
         parsed = dateutil.parser.parse(value)
-        return now().astimezone(ev.timezone).replace(
+        return now_dt.astimezone(ev.timezone).replace(
             hour=parsed.hour,
             minute=parsed.minute,
             second=parsed.second,
@@ -84,7 +86,42 @@ def _build_time(t=None, value=None, ev=None):
         return ev.date_admission or ev.date_from
 
 
-def _logic_explain(rules, ev, rule_data):
+def _logic_annotate_for_graphic_explain(rules, ev, rule_data):
+    logic_environment = _get_logic_environment(ev)
+    event = ev if isinstance(ev, Event) else ev.event
+
+    def _evaluate_inners(r):
+        if not isinstance(r, dict):
+            return r
+        operator = list(r.keys())[0]
+        values = r[operator]
+        if operator in ("and", "or"):
+            return {operator: [_evaluate_inners(v) for v in values]}
+        result = logic_environment.apply(r, rule_data)
+        return {**r, '__result': result}
+
+    def _add_var_values(r):
+        if not isinstance(r, dict):
+            return r
+        operator = [k for k in r.keys() if not k.startswith("__")][0]
+        values = r[operator]
+        if operator == "var":
+            var = values[0] if isinstance(values, list) else values
+            val = rule_data[var]
+            if var == "product":
+                val = str(event.items.get(pk=val))
+            elif var == "variation":
+                val = str(ItemVariation.objects.get(item__event=event, pk=val))
+            elif isinstance(val, datetime):
+                val = date_format(val.astimezone(ev.timezone), "SHORT_DATETIME_FORMAT")
+            return {"var": var, "__result": val}
+        else:
+            return {**r, operator: [_add_var_values(v) for v in values]}
+
+    return _add_var_values(_evaluate_inners(rules))
+
+
+def _logic_explain(rules, ev, rule_data, now_dt=None):
     """
     Explains when the logic denied the check-in. Only works for a denied check-in.
 
@@ -114,6 +151,7 @@ def _logic_explain(rules, ev, rule_data):
     Additionally, we favor a "close failure". Therefore, in the above example, we'd show "You can only
     get in before 17:00". In the middle of the night it would switch to "You can only get in after 09:00".
     """
+    now_dt = now_dt or now()
     logic_environment = _get_logic_environment(ev)
     _var_values = {'False': False, 'True': True}
     _var_explanations = {}
@@ -198,9 +236,9 @@ def _logic_explain(rules, ev, rule_data):
             else:
                 compare_to -= tolerance
 
-            var_weights[vname] = (200, abs(now() - compare_to).total_seconds())
+            var_weights[vname] = (200, abs(now_dt - compare_to).total_seconds())
 
-            if abs(now() - compare_to) < timedelta(hours=12):
+            if abs(now_dt - compare_to) < timedelta(hours=12):
                 compare_to_text = date_format(compare_to, 'TIME_FORMAT')
             else:
                 compare_to_text = date_format(compare_to, 'SHORT_DATETIME_FORMAT')
@@ -357,7 +395,7 @@ class LazyRuleVars:
     @cached_property
     def entries_today(self):
         tz = self._clist.event.timezone
-        midnight = now().astimezone(tz).replace(hour=0, minute=0, second=0, microsecond=0)
+        midnight = self._dt.astimezone(tz).replace(hour=0, minute=0, second=0, microsecond=0)
         return self._position.checkins.filter(type=Checkin.TYPE_ENTRY, list=self._clist, datetime__gte=midnight).count()
 
     @cached_property
@@ -378,7 +416,7 @@ class LazyRuleVars:
                 # between platforms (None<1 is true on some, but not all), we rather choose something that is at least
                 # consistent.
                 return -1
-            return (now() - last_entry.datetime).total_seconds() // 60
+            return (self._dt - last_entry.datetime).total_seconds() // 60
 
     @cached_property
     def minutes_since_first_entry(self):
@@ -390,7 +428,7 @@ class LazyRuleVars:
                 # between platforms (None<1 is true on some, but not all), we rather choose something that is at least
                 # consistent.
                 return -1
-            return (now() - last_entry.datetime).total_seconds() // 60
+            return (self._dt - last_entry.datetime).total_seconds() // 60
 
 
 class SQLLogic:
@@ -693,7 +731,7 @@ def _save_answers(op, answers, given_answers):
 def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict, force=False,
                     ignore_unpaid=False, nonce=None, datetime=None, questions_supported=True,
                     user=None, auth=None, canceled_supported=False, type=Checkin.TYPE_ENTRY,
-                    raw_barcode=None, raw_source_type=None, from_revoked_secret=False):
+                    raw_barcode=None, raw_source_type=None, from_revoked_secret=False, simulate=False):
     """
     Create a checkin for this particular order position and check-in list. Fails with CheckInError if the check in is
     not valid at this time.
@@ -707,6 +745,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
     :param questions_supported: When set to False, questions are ignored
     :param nonce: A random nonce to prevent race conditions.
     :param datetime: The datetime of the checkin, defaults to now.
+    :param simulate: If true, the check-in is not saved.
     """
 
     # !!!!!!!!!
@@ -734,7 +773,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
                 'blocked'
             )
 
-    if type != Checkin.TYPE_EXIT and op.valid_from and op.valid_from > now():
+    if type != Checkin.TYPE_EXIT and op.valid_from and op.valid_from > dt:
         if force:
             force_used = True
         else:
@@ -748,7 +787,7 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
                 ),
             )
 
-    if type != Checkin.TYPE_EXIT and op.valid_until and op.valid_until < now():
+    if type != Checkin.TYPE_EXIT and op.valid_until and op.valid_until < dt:
         if force:
             force_used = True
         else:
@@ -773,7 +812,8 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
             if q not in given_answers and q not in answers:
                 require_answers.append(q)
 
-        _save_answers(op, answers, given_answers)
+        if not simulate:
+            _save_answers(op, answers, given_answers)
 
     with transaction.atomic():
         # Lock order positions, if it is an entry. We don't need it for exits, as a race condition wouldn't be problematic
@@ -859,30 +899,33 @@ def perform_checkin(op: OrderPosition, clist: CheckinList, given_answers: dict,
             return
 
         if entry_allowed or force:
-            ci = Checkin.objects.create(
+            if simulate:
-                position=op,
+                return True
-                type=type,
+            else:
-                list=clist,
+                ci = Checkin.objects.create(
-                datetime=dt,
+                    position=op,
-                device=device,
+                    type=type,
-                gate=device.gate if device else None,
+                    list=clist,
-                nonce=nonce,
+                    datetime=dt,
-                forced=force and (not entry_allowed or from_revoked_secret or force_used),
+                    device=device,
-                force_sent=force,
+                    gate=device.gate if device else None,
-                raw_barcode=raw_barcode,
+                    nonce=nonce,
-                raw_source_type=raw_source_type,
+                    forced=force and (not entry_allowed or from_revoked_secret or force_used),
-            )
+                    force_sent=force,
-            op.order.log_action('pretix.event.checkin', data={
+                    raw_barcode=raw_barcode,
-                'position': op.id,
+                    raw_source_type=raw_source_type,
-                'positionid': op.positionid,
+                )
-                'first': True,
+                op.order.log_action('pretix.event.checkin', data={
-                'forced': force or op.order.status != Order.STATUS_PAID,
+                    'position': op.id,
-                'datetime': dt,
+                    'positionid': op.positionid,
-                'type': type,
+                    'first': True,
-                'answers': {k.pk: str(v) for k, v in given_answers.items()},
+                    'forced': force or op.order.status != Order.STATUS_PAID,
-                'list': clist.pk
+                    'datetime': dt,
-            }, user=user, auth=auth)
+                    'type': type,
-            checkin_created.send(op.order.event, checkin=ci)
+                    'answers': {k.pk: str(v) for k, v in given_answers.items()},
+                    'list': clist.pk
+                }, user=user, auth=auth)
+                checkin_created.send(op.order.event, checkin=ci)
         else:
             raise CheckInError(
                 _('This ticket has already been redeemed.'),

src/pretix/control/forms/checkin.py

@@ -31,7 +31,8 @@ from django_scopes.forms import (
 )
 
 from pretix.base.channels import get_all_sales_channels
-from pretix.base.models.checkin import CheckinList
+from pretix.base.forms.widgets import SplitDateTimePickerWidget
+from pretix.base.models.checkin import Checkin, CheckinList
 from pretix.control.forms import ItemMultipleChoiceField
 from pretix.control.forms.widgets import Select2
 
@@ -177,3 +178,26 @@ class SimpleCheckinListForm(forms.ModelForm):
             'subevent': SafeModelChoiceField,
             'gates': SafeModelMultipleChoiceField,
         }
+
+
+class CheckinListSimulatorForm(forms.Form):
+    raw_barcode = forms.CharField(
+        label=_("Barcode"),
+    )
+    datetime = forms.SplitDateTimeField(
+        label=_("Check-in time"),
+        widget=SplitDateTimePickerWidget(),
+    )
+    checkin_type = forms.ChoiceField(
+        label=_("Check-in type"),
+        choices=Checkin.CHECKIN_TYPES,
+    )
+    ignore_unpaid = forms.BooleanField(
+        label=_("Allow check-in of unpaid order (if check-in list permits it)"),
+        required=False,
+    )
+    questions_supported = forms.BooleanField(
+        label=_("Support for check-in questions"),
+        initial=True,
+        required=False,
+    )

src/pretix/control/templates/pretixcontrol/checkin/index.html

@@ -16,6 +16,11 @@
                 {% trans "Edit list configuration" %}
             </a>
         {% endif %}
+        <a href="{% url "control:event.orders.checkinlists.simulator" event=request.event.slug organizer=request.event.organizer.slug list=checkinlist.pk %}"
+           class="btn btn-default">
+            <span class="fa fa-flask"></span>
+            {% trans "Check-in simulator" %}
+        </a>
         <a href="{% url "control:event.orders.export" event=request.event.slug organizer=request.event.organizer.slug %}?identifier=checkinlistpdf&checkinlistpdf-list={{ checkinlist.pk }}"
                 class="btn btn-default" target="_blank">
             <span class="fa fa-download"></span>

src/pretix/control/templates/pretixcontrol/checkin/list_edit.html

@@ -12,7 +12,15 @@
 {% endblock %}
 {% block inside %}
     {% if checkinlist %}
-        <h1>{% blocktrans with name=checkinlist.name %}Check-in list: {{ name }}{% endblocktrans %}</h1>
+        <h1>
+            {% blocktrans with name=checkinlist.name %}Check-in list: {{ name }}{% endblocktrans %}
+            <a href="{% url "control:event.orders.checkinlists.simulator" event=request.event.slug organizer=request.event.organizer.slug list=checkinlist.pk %}"
+               target="_blank"
+               class="btn btn-default">
+                <span class="fa fa-flask"></span>
+                {% trans "Check-in simulator" %}
+            </a>
+        </h1>
     {% else %}
         <h1>{% trans "Check-in list" %}</h1>
     {% endif %}

src/pretix/control/templates/pretixcontrol/checkin/lists.html

@@ -133,6 +133,9 @@
                                         class="btn btn-sm btn-default" title="{% trans "Clone" %}" data-toggle="tooltip">
                                     <span class="fa fa-copy"></span>
                                 </a>
+                                <a href="{% url "control:event.orders.checkinlists.simulator" organizer=request.event.organizer.slug event=request.event.slug list=cl.id %}"
+                                   title="{% trans "Check-in simulator" %}" data-toggle="tooltip"
+                                   class="btn btn-default btn-sm"><i class="fa fa-flask"></i></a>
                                 <a href="{% url "control:event.orders.checkinlists.edit" organizer=request.event.organizer.slug event=request.event.slug list=cl.id %}" class="btn btn-default btn-sm"><i class="fa fa-wrench"></i></a>
                                 <a href="{% url "control:event.orders.checkinlists.delete" organizer=request.event.organizer.slug event=request.event.slug list=cl.id %}" class="btn btn-danger btn-sm"><i class="fa fa-trash"></i></a>
                             {% endif %}

src/pretix/control/templates/pretixcontrol/checkin/simulator.html

@@ -0,0 +1,140 @@
+{% extends "pretixcontrol/items/base.html" %}
+{% load i18n %}
+{% load bootstrap3 %}
+{% load escapejson %}
+{% load getitem %}
+{% load static %}
+{% load compress %}
+{% block title %}{% trans "Check-in simulator" %}{% endblock %}
+{% block inside %}
+    <h1>
+        {% blocktrans with name=checkinlist.name %}Check-in list: {{ name }}{% endblocktrans %}
+        {% if 'can_change_event_settings' in request.eventpermset %}
+            <a href="{% url "control:event.orders.checkinlists.edit" event=request.event.slug organizer=request.event.organizer.slug list=checkinlist.pk %}"
+               class="btn btn-default">
+                <span class="fa fa-wrench"></span>
+                {% trans "Edit list configuration" %}
+            </a>
+        {% endif %}
+    </h1>
+    <h2>{% trans "Check-in simulator" %}</h2>
+    <p>
+        {% blocktrans trimmed %}
+            This tool allows you to validate your check-in configuration. You can enter a barcode plus some
+            optional parameters and we will show you the response of the check-in list. No actual check-in will
+            be performed and no modification to the system state is made.
+        {% endblocktrans %}
+    </p>
+    <form action="" method="post" class="form-horizontal">
+        {% csrf_token %}
+        {% bootstrap_form_errors form %}
+        {% bootstrap_field form.raw_barcode layout="control" %}
+        {% bootstrap_field form.datetime layout="control" %}
+        {% bootstrap_field form.checkin_type layout="control" %}
+        {% bootstrap_field form.ignore_unpaid layout="control" %}
+        {% bootstrap_field form.questions_supported layout="control" %}
+        <div class="row">
+            <div class="col-md-9 col-md-offset-3">
+                <button type="submit" class="btn btn-primary">
+                    {% trans "Simulate" %}
+                </button>
+            </div>
+        </div>
+    </form>
+    {% if result %}
+        <hr>
+        <div class="panel panel-default">
+            <div class="panel-heading">
+                <div class="panel-title">{% trans "Result" %}</div>
+            </div>
+            <div class="panel-body checkin-sim-result checkin-sim-result-status-{{ result.status }} checkin-sim-result-reason-{{ result.reason }}">
+                {% if result.status == "ok" %}
+                    <span class="fa fa-check-circle"></span>
+                {% elif result.status == "incomplete" %}
+                    <span class="fa fa-question-circle"></span>
+                {% elif result.status == "error" %}
+                    {% if result.reason == "already_redeemed" %}
+                        <span class="fa fa-warning"></span>
+                    {% else %}
+                        <span class="fa fa-exclamation-circle"></span>
+                    {% endif %}
+                {% endif %}
+            </div>
+            <div class="panel-body">
+                {% if result.status == "ok" %}
+                    <h3 class="nomargin-top">{% trans "Valid check-in" %}</h3>
+                {% elif result.status == "incomplete" %}
+                    <h3 class="nomargin-top">{% trans "Additional information required" %}</h3>
+                    <p>
+                        {% trans "The following questions must be answered before check-in can be completed:" %}
+                    </p>
+                    <ul>
+                        {% for q in result.questions %}
+                            <li>
+                                <a href="{% url "control:event.items.questions.show" organizer=request.event.organizer.slug event=request.event.slug question=q.id %}">
+                                    {{ q.question }}
+                                </a>
+                            </li>
+                        {% endfor %}
+                    </ul>
+                {% elif result.status == "error" %}
+                    <h3 class="nomargin-top">{{ reason_labels|getitem:result.reason }}</h3>
+                    {% if result.reason_explanation %}
+                        <p>{{ result.reason_explanation }}</p>
+                    {% endif %}
+                {% endif %}
+                {% if result.position %}
+                    {% if result.position.require_attention %}
+                        <p>
+                            <span class="fa fa-info-circle fa-fw"></span> {% trans "Special attention required" %}
+                        </p>
+                    {% endif %}
+                    <p>
+                        <span class="fa fa-ticket fa-fw"></span>
+                        <a href="{% url "control:event.order" event=request.event.slug organizer=request.event.organizer.slug code=result.position.order %}">
+                            {{ result.position.order }}</a>-{{ result.position.positionid }}
+                    </p>
+                    {% if result.position.attendee_name %}
+                        <p>
+                            <span class="fa fa-user fa-fw"></span>
+                            {{ result.position.attendee_name }}
+                        </p>
+                    {% endif %}
+                {% endif %}
+                {% if result.rule_graph %}
+                    <div id="rules-editor" class="form-inline">
+                        <div role="tabpanel" class="tab-pane" id="rules-viz">
+                            <checkin-rules-visualization></checkin-rules-visualization>
+                        </div>
+                        <textarea id="id_rules" class="sr-only">{{ result.rule_graph|attr_escapejson_dumps }}</textarea>
+                    </div>
+                {% endif %}
+            </div>
+        </div>
+    {% endif %}
+
+
+    {% if DEBUG %}
+        <script type="text/javascript" src="{% static "vuejs/vue.js" %}"></script>
+    {% else %}
+        <script type="text/javascript" src="{% static "vuejs/vue.min.js" %}"></script>
+    {% endif %}
+    {% compress js %}
+        <script type="text/javascript" src="{% static "d3/d3.v6.js" %}"></script>
+        <script type="text/javascript" src="{% static "d3/d3-color.v2.js" %}"></script>
+        <script type="text/javascript" src="{% static "d3/d3-dispatch.v2.js" %}"></script>
+        <script type="text/javascript" src="{% static "d3/d3-ease.v2.js" %}"></script>
+        <script type="text/javascript" src="{% static "d3/d3-interpolate.v2.js" %}"></script>
+        <script type="text/javascript" src="{% static "d3/d3-selection.v2.js" %}"></script>
+        <script type="text/javascript" src="{% static "d3/d3-timer.v2.js" %}"></script>
+        <script type="text/javascript" src="{% static "d3/d3-transition.v2.js" %}"></script>
+        <script type="text/javascript" src="{% static "d3/d3-drag.v2.js" %}"></script>
+        <script type="text/javascript" src="{% static "d3/d3-zoom.v2.js" %}"></script>
+    {% endcompress %}
+    {% compress js %}
+        <script type="text/javascript" src="{% static "pretixcontrol/js/ui/checkinrules/jsonlogic-boolalg.js" %}"></script>
+        <script type="text/vue" src="{% static 'pretixcontrol/js/ui/checkinrules/viz-node.vue' %}"></script>
+        <script type="text/vue" src="{% static 'pretixcontrol/js/ui/checkinrules/checkin-rules-visualization.vue' %}"></script>
+        <script type="text/javascript" src="{% static "pretixcontrol/js/ui/checkinrules.js" %}"></script>
+    {% endcompress %}
+{% endblock %}

src/pretix/control/urls.py

@@ -429,6 +429,7 @@ urlpatterns = [
         re_path(r'^checkinlists/add$', checkin.CheckinListCreate.as_view(), name='event.orders.checkinlists.add'),
         re_path(r'^checkinlists/select2$', typeahead.checkinlist_select2, name='event.orders.checkinlists.select2'),
         re_path(r'^checkinlists/(?P<list>\d+)/$', checkin.CheckInListShow.as_view(), name='event.orders.checkinlists.show'),
+        re_path(r'^checkinlists/(?P<list>\d+)/simulator$', checkin.CheckInListSimulator.as_view(), name='event.orders.checkinlists.simulator'),
         re_path(r'^checkinlists/(?P<list>\d+)/bulk_action$', checkin.CheckInListBulkActionView.as_view(), name='event.orders.checkinlists.bulk_action'),
         re_path(r'^checkinlists/(?P<list>\d+)/change$', checkin.CheckinListUpdate.as_view(),
                 name='event.orders.checkinlists.edit'),

src/pretix/control/views/checkin.py

@@ -19,6 +19,19 @@
 # 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/>.
 #
+
+# This file is based on an earlier version of pretix which was released under the Apache License 2.0. The full text of
+# the Apache License 2.0 can be obtained at <http://www.apache.org/licenses/LICENSE-2.0>.
+#
+# This file may have since been changed and any changes are released under the terms of AGPLv3 as described above. A
+# full history of changes and contributors is available at <https://github.com/pretix/pretix>.
+#
+# This file contains Apache-licensed contributions copyrighted by: Jakob Schnell, jasonwaiting@live.hk, pajowu
+#
+# Unless required by applicable law or agreed to in writing, software distributed under the Apache License 2.0 is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under the License.
+import secrets
 from datetime import timezone
 
 import dateutil.parser
@@ -32,14 +45,21 @@ from django.urls import reverse
 from django.utils.functional import cached_property
 from django.utils.timezone import is_aware, make_aware, now
 from django.utils.translation import gettext_lazy as _
-from django.views.generic import ListView
+from django.views.generic import FormView, ListView
+from i18nfield.strings import LazyI18nString
 
+from pretix.api.views.checkin import _redeem_process
 from pretix.base.channels import get_all_sales_channels
 from pretix.base.models import Checkin, Order, OrderPosition
 from pretix.base.models.checkin import CheckinList
+from pretix.base.services.checkin import (
+    LazyRuleVars, _logic_annotate_for_graphic_explain,
+)
 from pretix.base.signals import checkin_created
 from pretix.base.views.tasks import AsyncPostView
-from pretix.control.forms.checkin import CheckinListForm
+from pretix.control.forms.checkin import (
+    CheckinListForm, CheckinListSimulatorForm,
+)
 from pretix.control.forms.filter import (
     CheckinFilterForm, CheckinListAttendeeFilterForm,
 )
@@ -48,18 +68,6 @@ from pretix.control.views import CreateView, PaginationMixin, UpdateView
 from pretix.helpers.compat import CompatDeleteView
 from pretix.helpers.models import modelcopy
 
-# This file is based on an earlier version of pretix which was released under the Apache License 2.0. The full text of
-# the Apache License 2.0 can be obtained at <http://www.apache.org/licenses/LICENSE-2.0>.
-#
-# This file may have since been changed and any changes are released under the terms of AGPLv3 as described above. A
-# full history of changes and contributors is available at <https://github.com/pretix/pretix>.
-#
-# This file contains Apache-licensed contributions copyrighted by: Jakob Schnell, jasonwaiting@live.hk, pajowu
-#
-# Unless required by applicable law or agreed to in writing, software distributed under the Apache License 2.0 is
-# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations under the License.
-
 
 class CheckInListQueryMixin:
 
@@ -469,3 +477,63 @@ class CheckinListView(EventPermissionRequiredMixin, PaginationMixin, ListView):
         ctx = super().get_context_data()
         ctx['filter_form'] = self.filter_form
         return ctx
+
+
+class CheckInListSimulator(EventPermissionRequiredMixin, FormView):
+    template_name = 'pretixcontrol/checkin/simulator.html'
+    permission = 'can_view_orders'
+    form_class = CheckinListSimulatorForm
+
+    def dispatch(self, request, *args, **kwargs):
+        self.list = get_object_or_404(self.request.event.checkin_lists.all(), pk=kwargs.get("list"))
+        self.result = None
+        r = super().dispatch(request, *args, **kwargs)
+        r['Content-Security-Policy'] = 'script-src \'unsafe-eval\''
+        return r
+
+    def get_initial(self):
+        return {
+            'datetime': now()
+        }
+
+    def get_context_data(self, **kwargs):
+        return super().get_context_data(
+            **kwargs,
+            checkinlist=self.list,
+            result=self.result,
+            reason_labels=dict(Checkin.REASONS),
+        )
+
+    def form_valid(self, form):
+        self.result = _redeem_process(
+            checkinlists=[self.list],
+            raw_barcode=form.cleaned_data["raw_barcode"],
+            answers_data={},
+            datetime=form.cleaned_data["datetime"],
+            force=False,
+            checkin_type=form.cleaned_data["checkin_type"],
+            ignore_unpaid=form.cleaned_data["ignore_unpaid"],
+            untrusted_input=True,
+            user=self.request.user,
+            auth=None,
+            expand=[],
+            nonce=secrets.token_hex(12),
+            pdf_data=False,
+            questions_supported=form.cleaned_data["questions_supported"],
+            canceled_supported=False,
+            request=self.request,  # this is not clean, but we need it in the serializers for URL generation
+            legacy_url_support=False,
+            simulate=True,
+        ).data
+
+        if form.cleaned_data["checkin_type"] == Checkin.TYPE_ENTRY and self.list.rules and self.result.get("position")\
+                and (self.result["status"] in ("ok", "incomplete") or self.result["reason"] == "rules"):
+            op = OrderPosition.objects.get(pk=self.result["position"]["id"])
+            rule_data = LazyRuleVars(op, self.list, form.cleaned_data["datetime"])
+            rule_graph = _logic_annotate_for_graphic_explain(self.list.rules, op.subevent or self.list.event, rule_data)
+            self.result["rule_graph"] = rule_graph
+
+        if self.result.get("questions"):
+            for q in self.result["questions"]:
+                q["question"] = LazyI18nString(q["question"])
+        return self.get(self.request, self.args, self.kwargs)

src/pretix/helpers/jsonlogic.py

@@ -213,7 +213,7 @@ class Logic():
 
         data = data or {}
 
-        operator = list(tests.keys())[0]
+        operator = [k for k in tests.keys() if not k.startswith("__")][0]
         values = tests[operator]
 
         # Easy syntax for unary operators, like {"var": "x"} instead of strict

src/pretix/static/pretixcontrol/js/ui/checkinrules.js

@@ -93,13 +93,19 @@ $(function () {
     },
   };
 
-  Vue.component('checkin-rule', CheckinRule.default);
+  var components = {
-  var app = new Vue({
+    CheckinRulesVisualization: CheckinRulesVisualization.default,
-    el: '#rules-editor',
+  }
-    components: {
+  if (typeof CheckinRule !== "undefined") {
+    Vue.component('checkin-rule', CheckinRule.default);
+    components = {
       CheckinRulesEditor: CheckinRulesEditor.default,
       CheckinRulesVisualization: CheckinRulesVisualization.default,
-    },
+    }
+  }
+  var app = new Vue({
+    el: '#rules-editor',
+    components: components,
     data: function () {
       return {
         rules: {},
@@ -187,17 +193,23 @@ $(function () {
     },
     created: function () {
       this.rules = JSON.parse($("#id_rules").val());
-      this.items = JSON.parse($("#items").html());
+      if ($("#items").length) {
+        this.items = JSON.parse($("#items").html());
 
-      var root = this.$root
+        var root = this.$root
-      function _update() {
+
-        root.all_products = $("#id_all_products").prop("checked")
+        function _update() {
-        root.limit_products = $("input[name=limit_products]:checked").map(function () { return parseInt($(this).val()) }).toArray()
+          root.all_products = $("#id_all_products").prop("checked")
+          root.limit_products = $("input[name=limit_products]:checked").map(function () {
+            return parseInt($(this).val())
+          }).toArray()
+        }
+
+        $("#id_all_products, input[name=limit_products]").on("change", function () {
+          _update();
+        })
+        _update()
       }
-      $("#id_all_products, input[name=limit_products]").on("change", function () {
-        _update();
-      })
-      _update()
     },
     watch: {
       rules: {

src/pretix/static/pretixcontrol/js/ui/checkinrules/checkin-rules-visualization.vue

@@ -106,6 +106,9 @@ export default {
             let [new_children, new_tails] = _add_to_graph(operand)
             for (let new_child of new_tails) {
               graph.nodes_by_id[new_child].children.push(...children)
+              for (let c of children) {
+                graph.nodes_by_id[c].parent = graph.nodes_by_id[new_child]
+              }
             }
             if (tails === null) {
               tails = new_tails

src/pretix/static/pretixcontrol/js/ui/checkinrules/viz-node.vue

@@ -3,20 +3,27 @@
         <path v-for="e in edges" :d="e" class="edge"></path>
         <path v-if="rootEdge" :d="rootEdge" class="edge"></path>
         <path v-if="!node.children.length" :d="checkEdge" class="edge"></path>
-        <rect :width="boxWidth" :height="boxHeight" :x="x" :y="y" class="node" rx="5">
+        <rect :width="boxWidth" :height="boxHeight" :x="x" :y="y" :class="nodeClass" rx="5">
         </rect>
+
         <foreignObject :width="boxWidth - 10" :height="boxHeight - 10" :x="x + 5" :y="y + 5">
             <div xmlns="http://www.w3.org/1999/xhtml" class="text">
                 <span v-if="vardata && vardata.type === 'int'">
                     <span v-if="variable.startsWith('entries_')" class="fa fa-sign-in"></span>
                     {{ vardata.label }}
                     <br>
+                    <span v-if="varresult !== null">
+                      {{varresult}}
+                    </span>
                     <strong>
-                        {{ op.label }} {{ rightoperand }}
+                      {{ op.label }} {{ rightoperand }}
                     </strong>
                 </span>
                 <span v-else-if="vardata && variable === 'now'">
                     <span class="fa fa-clock-o"></span> {{ vardata.label }}<br>
+                    <span v-if="varresult !== null">
+                      {{varresult}}
+                    </span>
                     <strong>
                         {{ op.label }}<br>
                         <span v-if="rightoperand.buildTime[0] === 'custom'">
@@ -37,7 +44,11 @@
                     </strong>
                 </span>
                 <span v-else-if="vardata && operator === 'inList'">
-                    <span class="fa fa-ticket"></span> {{ vardata.label }}<br>
+                    <span class="fa fa-ticket"></span> {{ vardata.label }}
+                    <span v-if="varresult !== null">
+                      ({{varresult}})
+                    </span>
+                    <br>
                     <strong>
                         {{ rightoperand.objectList.map((o) => o.lookup[2]).join(", ") }}
                     </strong>
@@ -45,9 +56,23 @@
             </div>
         </foreignObject>
 
-        <g v-if="!node.children.length" :transform="`translate(${x + boxWidth + 25}, ${y + boxHeight/2 - 15})`">
+        <g v-if="result === false" :transform="`translate(${x + boxWidth - 15}, ${y - 10})`">
-            <path d="m 25.078125,11.835938 c 0,-0.332032 -0.117188,-0.664063 -0.351563,-0.898438 L 22.949219,9.1796875 c -0.234375,-0.234375 -0.546875,-0.3710937 -0.878907,-0.3710937 -0.332031,0 -0.644531,0.1367187 -0.878906,0.3710937 L 13.222656,17.128906 8.8085938,12.714844 C 8.5742188,12.480469 8.2617188,12.34375 7.9296875,12.34375 c -0.3320313,0 -0.6445313,0.136719 -0.8789063,0.371094 l -1.7773437,1.757812 c -0.234375,0.234375 -0.3515625,0.566407 -0.3515625,0.898438 0,0.332031 0.1171875,0.644531 0.3515625,0.878906 l 7.0703125,7.070312 c 0.234375,0.234375 0.566406,0.371094 0.878906,0.371094 0.332032,0 0.664063,-0.136719 0.898438,-0.371094 L 24.726562,12.714844 c 0.234375,-0.234375 0.351563,-0.546875 0.351563,-0.878906 z M 30,15 C 30,23.28125 23.28125,30 15,30 6.71875,30 0,23.28125 0,15 0,6.71875 6.71875,0 15,0 23.28125,0 30,6.71875 30,15 Z"
+          <ellipse fill="#fff" cx="14.685823" cy="14.318233" rx="12.140151" ry="11.55523" />
-                  class="check"/>
+          <path d="M 15,0 C 23.28125,0 30,6.71875 30,15 30,23.28125 23.28125,30 15,30 6.71875,30 0,23.28125 0,15 0,6.71875 6.71875,0 15,0 Z m 2.5,24.35547 V 20.64453 C 17.5,20.29297 17.22656,20 16.89453,20 h -3.75 C 12.79297,20 12.5,20.29297 12.5,20.64453 v 3.71094 C 12.5,24.70703 12.79297,25 13.14453,25 h 3.75 C 17.22656,25 17.5,24.70703 17.5,24.35547 Z M 17.4609,17.63672 17.81246,5.50781 c 0,-0.13672 -0.0586,-0.27343 -0.19531,-0.35156 C 17.49996,5.05855 17.32418,5 17.1484,5 h -4.29688 c -0.17578,0 -0.35156,0.0586 -0.46875,0.15625 -0.13672,0.0781 -0.19531,0.21484 -0.19531,0.35156 l 0.33203,12.12891 c 0,0.27344 0.29297,0.48828 0.66406,0.48828 h 3.61329 c 0.35156,0 0.64453,-0.21484 0.66406,-0.48828 z"
+                class="error" />
+        </g>
+        <g v-if="result === true" :transform="`translate(${x + boxWidth - 15}, ${y - 10})`">
+          <ellipse fill="#fff" cx="14.685823" cy="14.318233" rx="12.140151" ry="11.55523" />
+          <path d="m 25.078125,11.835938 c 0,-0.332032 -0.117188,-0.664063 -0.351563,-0.898438 L 22.949219,9.1796875 c -0.234375,-0.234375 -0.546875,-0.3710937 -0.878907,-0.3710937 -0.332031,0 -0.644531,0.1367187 -0.878906,0.3710937 L 13.222656,17.128906 8.8085938,12.714844 C 8.5742188,12.480469 8.2617188,12.34375 7.9296875,12.34375 c -0.3320313,0 -0.6445313,0.136719 -0.8789063,0.371094 l -1.7773437,1.757812 c -0.234375,0.234375 -0.3515625,0.566407 -0.3515625,0.898438 0,0.332031 0.1171875,0.644531 0.3515625,0.878906 l 7.0703125,7.070312 c 0.234375,0.234375 0.566406,0.371094 0.878906,0.371094 0.332032,0 0.664063,-0.136719 0.898438,-0.371094 L 24.726562,12.714844 c 0.234375,-0.234375 0.351563,-0.546875 0.351563,-0.878906 z M 30,15 C 30,23.28125 23.28125,30 15,30 6.71875,30 0,23.28125 0,15 0,6.71875 6.71875,0 15,0 23.28125,0 30,6.71875 30,15 Z"
+                class="check"/>
+        </g>
+        <g v-if="!node.children.length && (resultInclParents === null || resultInclParents === true)" :transform="`translate(${x + boxWidth + 25}, ${y + boxHeight/2 - 15})`">
+          <path d="m 25.078125,11.835938 c 0,-0.332032 -0.117188,-0.664063 -0.351563,-0.898438 L 22.949219,9.1796875 c -0.234375,-0.234375 -0.546875,-0.3710937 -0.878907,-0.3710937 -0.332031,0 -0.644531,0.1367187 -0.878906,0.3710937 L 13.222656,17.128906 8.8085938,12.714844 C 8.5742188,12.480469 8.2617188,12.34375 7.9296875,12.34375 c -0.3320313,0 -0.6445313,0.136719 -0.8789063,0.371094 l -1.7773437,1.757812 c -0.234375,0.234375 -0.3515625,0.566407 -0.3515625,0.898438 0,0.332031 0.1171875,0.644531 0.3515625,0.878906 l 7.0703125,7.070312 c 0.234375,0.234375 0.566406,0.371094 0.878906,0.371094 0.332032,0 0.664063,-0.136719 0.898438,-0.371094 L 24.726562,12.714844 c 0.234375,-0.234375 0.351563,-0.546875 0.351563,-0.878906 z M 30,15 C 30,23.28125 23.28125,30 15,30 6.71875,30 0,23.28125 0,15 0,6.71875 6.71875,0 15,0 23.28125,0 30,6.71875 30,15 Z"
+                class="check"/>
+        </g>
+        <g v-if="!node.children.length && (resultInclParents === false)" :transform="`translate(${x + boxWidth + 25}, ${y + boxHeight/2 - 15})`">
+          <path d="M 15,0 C 23.28125,0 30,6.71875 30,15 30,23.28125 23.28125,30 15,30 6.71875,30 0,23.28125 0,15 0,6.71875 6.71875,0 15,0 Z m 2.5,24.35547 V 20.64453 C 17.5,20.29297 17.22656,20 16.89453,20 h -3.75 C 12.79297,20 12.5,20.29297 12.5,20.64453 v 3.71094 C 12.5,24.70703 12.79297,25 13.14453,25 h 3.75 C 17.22656,25 17.5,24.70703 17.5,24.35547 Z M 17.4609,17.63672 17.81246,5.50781 c 0,-0.13672 -0.0586,-0.27343 -0.19531,-0.35156 C 17.49996,5.05855 17.32418,5 17.1484,5 h -4.29688 c -0.17578,0 -0.35156,0.0586 -0.46875,0.15625 -0.13672,0.0781 -0.19531,0.21484 -0.19531,0.35156 l 0.33203,12.12891 c 0,0.27344 0.29297,0.48828 0.66406,0.48828 h 3.61329 c 0.35156,0 0.64453,-0.21484 0.66406,-0.48828 z"
+                class="error" />
         </g>
     </g>
 </template>
@@ -121,6 +146,14 @@
       vardata () {
         return this.$root.VARS[this.variable];
       },
+      varresult () {
+        const op = this.operator;
+        if (this.node.rule[op] && this.node.rule[op][0]) {
+          return this.node.rule[op][0]["__result"];
+        } else {
+          return "";
+        }
+      },
       rightoperand () {
         const op = this.operator;
         if (this.node.rule[op] && typeof this.node.rule[op][1] !== "undefined") {
@@ -136,8 +169,30 @@
         return this.node.rule[this.operator]
       },
       operator: function () {
-        return Object.keys(this.node.rule)[0];
+        return Object.keys(this.node.rule).filter(function (k) { return !k.startsWith("__") })[0];
       },
+      result: function () {
+        return typeof this.node.rule.__result == "undefined" ? null : !!this.node.rule.__result
+      },
+      resultInclParents: function () {
+        if (typeof this.node.rule.__result == "undefined")
+          return null
+
+        function _p(node) {
+          if (node.parent) {
+            return node.rule.__result && _p(node.parent)
+          }
+          return node.rule.__result
+        }
+        return _p(this.node)
+      },
+      nodeClass: function () {
+        return {
+          "node": true,
+          "node-true": this.result === true,
+          "node-false": this.result === false,
+        }
+      }
     },
     methods: {
       df (val) {

src/pretix/static/pretixcontrol/scss/_forms.scss

@@ -716,6 +716,12 @@ table td > .checkbox input[type="checkbox"] {
         stroke: $brand-primary;
       }
     }
+    .node-false {
+      stroke: $brand-danger;
+    }
+    .node-true {
+      stroke: $brand-success;
+    }
     .edge {
       stroke: $gray-light;
       stroke-width: 2px;
@@ -724,6 +730,9 @@ table td > .checkbox input[type="checkbox"] {
     .check {
       fill: $brand-success;
     }
+    .error {
+      fill: $brand-danger;
+    }
     .text {
       font-size: 12px;
       width: 100%;
@@ -739,6 +748,10 @@ table td > .checkbox input[type="checkbox"] {
     position: absolute;
     top: 10px;
     right: 10px;
+    opacity: 0;
+  }
+  &:hover .tools {
+    opacity: 1;
   }
 
   &.maximized {

src/pretix/static/pretixcontrol/scss/main.scss

@@ -830,6 +830,30 @@ tbody th {
     }
 }
 
+.nomargin-top {
+    margin-top: 0;
+}
+
+.checkin-sim-result {
+    text-align: center;
+    padding: 20px;
+    .fa {
+        color: white;
+        font-size: 50px;
+    }
+}
+.checkin-sim-result-status-ok {
+    background: $brand-success;
+}
+.checkin-sim-result-status-incomplete {
+    background: $brand-primary;
+}
+.checkin-sim-result-status-error {
+    background: $brand-danger;
+}
+.checkin-sim-result-status-error.checkin-sim-result-reason-already_redeemed {
+    background: $brand-warning;
+}
 
 .withoutjs {
     display: none !important;