From b6dd9a0df0b7a09e93b04b09a5ae25a32f3771d6 Mon Sep 17 00:00:00 2001
From: Raphael Michel <mail@raphaelmichel.de>
Date: Mon, 6 Feb 2017 23:41:04 +0100
Subject: [PATCH] Sales estimate

---
 .../pretixcontrol/waitinglist/index.html      | 82 ++++++++++++-------
 src/pretix/control/views/waitinglist.py       | 13 +++
 2 files changed, 66 insertions(+), 29 deletions(-)

diff --git a/src/pretix/control/templates/pretixcontrol/waitinglist/index.html b/src/pretix/control/templates/pretixcontrol/waitinglist/index.html
index ee918db2631..9f9a14a6789 100644
--- a/src/pretix/control/templates/pretixcontrol/waitinglist/index.html
+++ b/src/pretix/control/templates/pretixcontrol/waitinglist/index.html
@@ -10,6 +10,59 @@ <h1>{% trans "Waiting list" %}</h1>
             {% trans "The waiting list is disabled, so if the event is sold out, people cannot add themselves to this list. If you want to enable it, go to the event settings." %}
         </div>
     {% endif %}
+    <div class="row">
+        {% if request.eventperm.can_change_orders %}
+            <form method="post" class="col-md-6"
+                    action="{% url "control:event.orders.waitinglist.auto" event=request.event.slug organizer=request.organizer.slug %}"
+                    data-asynctask>
+                <div class="panel panel-default">
+                    <div class="panel-heading">
+                        {% trans "Send vouchers" %}
+                    </div>
+                    <div class="panel-body">
+                        {% csrf_token %}
+                        {% if request.event.settings.waiting_list_auto %}
+                            <p>
+                                {% blocktrans trimmed %}
+                                    You have configured that vouchers will automatically be sent to the persons on this list who waited
+                                    the longest as soon as capacity becomes available. It might take up to half an hour for the
+                                    vouchers to be sent after the capacity is available, so don't worry if entries do not disappear
+                                    here immediately. If you want, you can also send them out manually right now.
+                                {% endblocktrans %}
+                            </p>
+                        {% else %}
+                            <p>
+                                {% blocktrans trimmed %}
+                                    You have configured that vouchers will <strong>not</strong> be sent automatically.
+                                    You can either send them one-by-one in an order of your choice by clicking the
+                                    buttons next to a line in this table (if sufficient quota is available) or you can
+                                    press the big button below this text to send out as many vouchers as currently
+                                    possible to the persons who waitet longest.
+                                {% endblocktrans %}
+                            </p>
+                        {% endif %}
+                        <button class="btn btn-large btn-primary" type="submit">
+                            {% trans "Send as many vouchers as possible" %}
+                        </button>
+                    </div>
+                </div>
+            </form>
+        {% endif %}
+        <div class="{% if request.eventperm.can_change_orders %}col-md-6{% else %}col-md-12{% endif %}">
+            <div class="panel panel-default">
+                <div class="panel-heading">
+                    {% trans "Sales estimate" %}
+                </div>
+                <div class="panel-body">
+                    {% blocktrans trimmed with amount=estimate|floatformat:2 currency=request.event.currency %}
+                        If you can make enough room at your event to fit all the persons on the waiting list in, you
+                        could sell tickets worth an additional <strong>{{ amount }} {{ currency }}</strong>.
+                    {% endblocktrans %}
+                </div>
+            </div>
+        </div>
+    </div>
+
     <p>
     <form class="form-inline helper-display-inline" action="" method="get">
         <select name="status" class="form-control">
@@ -32,35 +85,6 @@ <h1>{% trans "Waiting list" %}</h1>
         <button class="btn btn-primary" type="submit">{% trans "Filter" %}</button>
     </form>
     </p>
-    {% if request.eventperm.can_change_orders %}
-        <form method="post"
-                action="{% url "control:event.orders.waitinglist.auto" event=request.event.slug organizer=request.organizer.slug %}"
-                data-asynctask>
-            {% csrf_token %}
-            {% if request.event.settings.waiting_list_auto %}
-                <p>
-                    {% blocktrans trimmed %}
-                        You have configured that vouchers will automatically be sent to the persons on this list who waited
-                        the longest as soon as capacity becomes available. It might take up to half an hour for the
-                        vouchers to be sent after the capacity is available, so don't worry if entries do not disappear
-                        here immediately. If you want, you can also send them out manually right now.
-                    {% endblocktrans %}
-                </p>
-            {% else %}
-                <p>
-                    {% blocktrans trimmed %}
-                        You have configured that vouchers will <strong>not</strong> be sent automatically. You can
-                        either send them one-by-one in an order of your choice by clicking the buttons next to a line
-                        in this table (if sufficient quota is available) or you can press the big button below this
-                        text to send out as many vouchers as currently possible to the persons who waitet longest.
-                    {% endblocktrans %}
-                </p>
-            {% endif %}
-            <button class="btn btn-large btn-primary" type="submit">
-                {% trans "Send as many vouchers as possible to the top persons on the list" %}
-            </button>
-        </form>
-    {% endif %}
     <form method="post" action="">
         {% csrf_token %}
         <div class="table-responsive">
diff --git a/src/pretix/control/views/waitinglist.py b/src/pretix/control/views/waitinglist.py
index 01da286930f..90327754b32 100644
--- a/src/pretix/control/views/waitinglist.py
+++ b/src/pretix/control/views/waitinglist.py
@@ -1,4 +1,6 @@
 from django.contrib import messages
+from django.db.models import Sum
+from django.db.models.functions import Coalesce
 from django.shortcuts import redirect
 from django.urls import reverse
 from django.utils.translation import ugettext_lazy as _
@@ -111,4 +113,15 @@ def get_context_data(self, **kwargs):
                 any_avail = True
 
         ctx['any_avail'] = any_avail
+        ctx['estimate'] = self.get_sales_estimate()
         return ctx
+
+    def get_sales_estimate(self):
+        qs = WaitingListEntry.objects.filter(
+            event=self.request.event
+        ).aggregate(
+            s=Sum(
+                Coalesce('variation__default_price', 'item__default_price')
+            )
+        )
+        return qs['s']