Introduce cancellation requests (#1627)

* Allow to adjust the cancellation fee without JS

* Introduce cancellation requests

* ignore→delete

* Change a few things after Martin's review

* Add a few tests

src/pretix/control/templates/pretixcontrol/event/cancel.html

@@ -15,6 +15,7 @@
             <fieldset>
                 <legend>{% trans "Paid orders" %}</legend>
                 {% bootstrap_field form.cancel_allow_user_paid layout="control" %}
+                {% bootstrap_field form.cancel_allow_user_paid_require_approval layout="control" %}
                 {% bootstrap_field form.cancel_allow_user_paid_keep layout="control" %}
                 {% bootstrap_field form.cancel_allow_user_paid_keep_percentage layout="control" %}
                 {% bootstrap_field form.cancel_allow_user_paid_keep_fees layout="control" %}

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

@@ -34,6 +34,15 @@
                     class="btn btn-primary">{% trans "Show pending refunds" %}</a>
         </div>
     {% endif %}
+    {% if has_cancellation_requests %}
+        <div class="alert alert-warning">
+            {% blocktrans trimmed %}
+                This event contains <strong>requested cancellations</strong> that you should take care of.
+            {% endblocktrans %}
+            <a href="{% url "control:event.orders" event=request.event.slug organizer=request.event.organizer.slug %}?status=rc"
+                    class="btn btn-primary">{% trans "Show orders requesting cancellation" %}</a>
+        </div>
+    {% endif %}
     {% if has_pending_approvals %}
         <div class="alert alert-warning">
             {% blocktrans trimmed %}

src/pretix/control/templates/pretixcontrol/order/cancellation_request_delete.html

@@ -0,0 +1,32 @@
+{% extends "pretixcontrol/event/base.html" %}
+{% load i18n %}
+{% block title %}
+    {% trans "Ignore cancellation request" %}
+{% endblock %}
+{% block content %}
+    <h1>
+        {% trans "Ignore cancellation request" %}
+    </h1>
+    <p>{% blocktrans trimmed %}
+        Do you really want to remove this cancellation request? The user will not be informed automatically, but you
+        will have the option to email them individually in the next step.
+    {% endblocktrans %}</p>
+
+    <form method="post" href="">
+        {% csrf_token %}
+        <div class="row checkout-button-row">
+            <div class="col-md-4">
+                <a class="btn btn-block btn-default btn-lg"
+                        href="{% url "control:event.order" event=request.event.slug organizer=request.event.organizer.slug code=order.code %}">
+                    {% trans "No, take me back" %}
+                </a>
+            </div>
+            <div class="col-md-4 col-md-offset-4">
+                <button class="btn btn-block btn-danger btn-lg" type="submit">
+                    {% trans "Yes, delete request" %}
+                </button>
+            </div>
+            <div class="clearfix"></div>
+        </div>
+    </form>
+{% endblock %}

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

@@ -112,6 +112,40 @@
 
     <div class="row">
         <div class="col-xs-12 col-lg-10">
+            {% for cr in order.cancellation_requests.all %}
+                <div class="panel panel-warning items">
+                    <div class="panel-heading">
+                        <h3 class="panel-title">
+                            {% trans "Cancellation request" %}
+                        </h3>
+                    </div>
+                    <div class="panel-body">
+                        {% trans "The customer asked you to cancel the order with the following settings:" %}
+                        <dl class="dl-horizontal">
+                            <dt>{% trans "Refund method" %}</dt>
+                            <dd>
+                                {% if cr.refund_as_giftcard %}
+                                    {% trans "Gift card" %}
+                                {% else %}
+                                    {% trans "Original payment method" %}
+                                {% endif %}
+                            </dd>
+                            <dt>{% trans "Cancellation fee" %}</dt>
+                            <dd>{{ cr.cancellation_fee|money:request.event.currency }}</dd>
+                        </dl>
+                        <div class="text-right">
+                            <a href="{% url "control:event.order.cancellationrequests.delete" event=request.event.slug organizer=request.event.organizer.slug code=order.code req=cr.pk %}"
+                                    class="btn btn-default btn-lg" data-toggle="tooltip">
+                                {% trans "Delete request" %}
+                            </a>
+                            <a href="{% url "control:event.order.transition" event=request.event.slug organizer=request.event.organizer.slug code=order.code %}?status=c&req={{ cr.pk }}" class="btn btn-primary btn-lg">
+                                {% trans "Cancel order" %}
+                            </a>
+                        </div>
+                    </div>
+                </div>
+            {% endfor %}
+
             <div class="panel panel-primary items">
                 <div class="panel-heading">
                     <h3 class="panel-title">

src/pretix/control/templates/pretixcontrol/order/refund_choose.html

@@ -94,7 +94,7 @@
                         <td>
                             <div class="input-group">
                                 <input type="text" name="refund-new-giftcard"
-                                       title="" class="form-control" value="{{ 0|floatformat:2 }}">
+                                       title="" class="form-control" value="{{ giftcard_proposal|floatformat:2 }}">
                                 <span class="input-group-addon">
                                     {{ request.event.currency }}
                                 </span>

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

@@ -128,6 +128,9 @@
                         </td>
                         <td>{{ o.datetime|date:"SHORT_DATETIME_FORMAT" }}</td>
                         <td class="text-right flip">
+                            {% if o.has_cancellation_request %}
+                                <span class="label label-warning">{% trans "CANCELLATION REQUESTED" %}</span>
+                            {% endif %}
                             {% if o.has_external_refund or o.has_pending_refund %}
                                 <span class="label label-danger">{% trans "REFUND PENDING" %}</span>
                             {% elif o.has_pending_refund %}