add option to disallow voting after a specific date

implements #3

pretalx_halfnarp/forms.py

@@ -0,0 +1,15 @@
+from django.forms import DateField
+from django.utils.translation import gettext_lazy as _
+from hierarkey.forms import HierarkeyForm
+from i18nfield.forms import I18nFormMixin
+
+
+class HalfnarpSettingsForm(I18nFormMixin, HierarkeyForm):
+    halfnarp_allow_voting_until = DateField(
+        help_text=_(
+            "Voting closes at midnight at the selected day. If unset, "
+            "voting is allowed until a schedule is released."
+        ),
+        label=_("Allow votes until"),
+        required=False,
+    )

pretalx_halfnarp/templates/pretalx_halfnarp/frontend.html

@@ -22,6 +22,7 @@ <h1>{% translate "Presentation Preference" %}</h1>
             Thank you for helping us plan a better program for the upcoming conference.
         {% endblocktranslate %}
     </p>
+{% if voting_is_enabled %}
     <p>
         {% blocktranslate trimmed %}
             In the list below you will find all the talks we have accepted for the conference.
@@ -59,4 +60,11 @@ <h2 class="title">{{submission.title}}</h2>
 
         {% endfor %}
     </div>
+{% else %}
+    <p>
+        {% blocktranslate trimmed %}
+            The voting period has ended.
+        {% endblocktranslate %}
+    </p>
+{% endif %}
 {% endblock %}

pretalx_halfnarp/templates/pretalx_halfnarp/organiser.html

@@ -12,34 +12,61 @@
 {% endcompress %}
 {% endblock %}
 
+{% block scripts %}
+    {% compress js %}
+        <script defer src="{% static "vendored/moment-with-locales.js" %}"></script>
+        <script defer src="{% static "vendored/moment-timezone-with-data-10-year-range.js" %}"></script>
+        <script defer src="{% static "vendored/datetimepicker/bootstrap-datetimepicker.js" %}"></script>
+        <script defer src="{% static "orga/js/datetimepicker.js" %}"></script>
+    {% endcompress %}
+{% endblock %}
+
 {% block content %}
-<div class="title">
-    <h2>{% translate "Most Preferred Submissions" %}</h2>
-    <a class="btn btn-info" href="{% url "plugins:pretalx_halfnarp:frontend" event %}" target="_blank">
-        <i class="fa fa-external-link" aria-hidden="true"></i>
-        {% translate "Link to Vote-Page" %}
-    </a>
-</div>
-<p>
-    {% blocktranslate trimmed %}
-    The following Submissions have been voted the most (in descending order).
-    {% endblocktranslate %}
-</p>
-<div class="submissions">
-    {% for info in most_preferred_submissions %}
-        <div class="submission card mb-3">
-            <div class="card-body">
-                <div class="card-title headline">
-                    <h2 class="title">{{info.submission.title}}</h2>
-                    <span class="counter">Votes: {{info.count}}/{{num_preferences}}</span>
-                </div>
-                <p class="speakers">{{info.submission.display_speaker_names}}</p>
-                <div class="footer">
-                    <div class="track">Track: <span class="track">{{info.submission.track}}</span></div>
-                    <a href="{{info.submission.orga_urls.base}}" target="_blank">{% translate "More info" %}</a>
+    <div class="title">
+        <h2>{% translate "Most Preferred Submissions" %}</h2>
+        <a class="btn btn-info" href="{% url "plugins:pretalx_halfnarp:frontend" request.event %}" target="_blank">
+            <i class="fa fa-external-link" aria-hidden="true"></i>
+            {% translate "Link to Vote-Page" %}
+        </a>
+    </div>
+    <form method="post">
+        {% csrf_token %}
+        <fieldset>
+            <legend>{% translate "Settings" %}</legend>
+
+            {% bootstrap_form_errors form %}
+
+            {% bootstrap_field form.halfnarp_allow_voting_until layout='event' %}
+        </fieldset>
+        <div class="submit-group panel">
+            <span>
+                <button type="submit" class="btn btn-success btn-lg">
+                    <i class="fa fa-check"></i>
+                    {% translate "Save" %}
+                </button>
+            </span>
+        </div>
+    </form>
+    <p>
+        {% blocktranslate trimmed %}
+        The following Submissions have been voted the most (in descending order).
+        {% endblocktranslate %}
+    </p>
+    <div class="submissions">
+        {% for info in most_preferred_submissions %}
+            <div class="submission card mb-3">
+                <div class="card-body">
+                    <div class="card-title headline">
+                        <h2 class="title">{{info.submission.title}}</h2>
+                        <span class="counter">Votes: {{info.count}}/{{num_preferences}}</span>
+                    </div>
+                    <p class="speakers">{{info.submission.display_speaker_names}}</p>
+                    <div class="footer">
+                        <div class="track">Track: <span class="track">{{info.submission.track}}</span></div>
+                        <a href="{{info.submission.orga_urls.base}}" target="_blank">{% translate "More info" %}</a>
+                    </div>
                 </div>
             </div>
-        </div>
-    {% endfor %}
-</div>
+        {% endfor %}
+    </div>
 {% endblock %}

pretalx_halfnarp/views/frontend.py

@@ -2,6 +2,8 @@
 import secrets
 from datetime import timedelta
 
+import pytz
+from django.utils import timezone
 from django.views.generic import TemplateView
 from django_context_decorator import context
 from pretalx.cfp.views.event import EventPageMixin
@@ -50,3 +52,25 @@ def preferred_talks(self):
             return list(preference.preferred_submission_ids)
         except Preference.DoesNotExist:
             return []
+
+    @context
+    def voting_is_enabled(self):
+        until = None
+        try:
+            until = self.request.event.settings.halfnarp_allow_voting_until
+        except AttributeError:
+            pass
+        if until is None:
+            if not self.request.event.current_schedule:
+                return True
+        else:
+            until = timezone.datetime.strptime(until, "%Y-%m-%d").astimezone(
+                pytz.timezone(self.request.event.timezone)
+            )
+
+            tz = timezone.activate(pytz.timezone(self.request.event.timezone))
+            now = timezone.localtime()
+
+            if now < until:
+                return True
+        return False

pretalx_halfnarp/views/organiser.py

@@ -1,14 +1,16 @@
 from collections import Counter
 
-from django.views.generic import TemplateView
+from django.views.generic import FormView
 from django_context_decorator import context
 from pretalx.common.mixins.views import EventPermissionRequired
 from pretalx.submission.models import Submission
 
+from pretalx_halfnarp.forms import HalfnarpSettingsForm
 from pretalx_halfnarp.models import Preference
 
 
-class OrganiserView(EventPermissionRequired, TemplateView):
+class OrganiserView(EventPermissionRequired, FormView):
+    form_class = HalfnarpSettingsForm
     permission_required = "orga.view_submissions"
     template_name = "pretalx_halfnarp/organiser.html"
 
@@ -35,3 +37,22 @@ def most_preferred_submissions(self):
     @context
     def most_correlated_submissions(self):
         return []
+
+    def form_valid(self, form):
+        form.save()
+        return super().form_valid(form)
+
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        return {
+            "obj": self.request.event,
+            "attribute_name": "settings",
+            "locales": self.request.event.locales,
+            **kwargs,
+        }
+
+    def get_object(self):
+        return self.request.event
+
+    def get_success_url(self):
+        return self.request.path