feat: initial dashboard

app/base/static/css/style.css

@@ -133,12 +133,15 @@ table th {
   background-color: var(--bg-dim);
 }
 
-thead>tr {
+thead>tr, tr.thead {
   border: 1px solid #DDD;
   position: sticky;
   top: 4rem;
   z-index: 98;
 }
+tr.thead>th {
+  vertical-align: bottom;
+}
 
 /* .detail-table {
   width: max-content;
@@ -161,6 +164,10 @@ tbody>tr {
   border: 1px solid #DDD;
 }
 
+tr.blank {
+  height: 3ex;
+}
+
 td.table-actions {
   padding: 0;
   text-align: center;
@@ -295,6 +302,12 @@ table.clickable tbody>tr:hover {
   text-align: center;
 }
 
+.div-by-side>div {
+  display: inline-block;
+  vertical-align: top;
+  margin-right: 1em;
+}
+
 #page-content-wrapper {
   margin-bottom: 15px;
 }

app/base/templates/dashboard.html

@@ -0,0 +1,63 @@
+{% extends 'base.html' %}
+{% load utils %}
+
+{% block content %}
+
+<div class="div-by-side">
+
+<div>
+<table class="table">
+  <thead>
+    <tr><th><h4 class="mb-0">{{ head.traits }}</h4></th><th>Personen</th></tr>
+  </thead>
+  {% for stat in trait.by_type %}
+  <tr>
+    <th>{{ trait.labels|get_item:stat.trait }}</th>
+    <td class="text-center"><a href="{% url 'trait-mapping:list' %}?trait={{stat.trait}}">{{ stat.count }}</a></td>
+  </tr>
+  {% endfor %}
+</table>
+</div>
+
+<div>
+<table class="table">
+  <thead>
+    <tr><th><h4 class="mb-0">{{ head.booking_types }}</h4></th><th>Buchungen</th><th>Dauer (ø)</th><th>Gesamt</th></tr>
+  </thead>
+  {% for stat in booking.by_type %}
+  <tr>
+    <th>{{ booking.labels|get_item:stat.type }}</th>
+    <td class="text-center">{{ stat.count }}</td>
+    <td class="text-right">{{ stat.sum|divide:stat.count|floatformat:1 }} Min.</td>
+    <td class="text-right">{{ stat.sum }} Min.</td>
+  </tr>
+  {% endfor %}
+</table>
+</div>
+
+</div>
+
+<h3>{{ head.bookings }}</h3>
+<table class="table table-sm">
+  {% for year, stat in booking.by_month.items reversed %}
+  <tr class="thead">
+    <th><h4 class="mb-0">{{ year }}</h4></th>
+    <th>∑</th><th>Jan</th><th>Feb</th><th>Mär</th><th>Apr</th><th>Mai</th><th>Jun</th><th>Jul</th><th>Aug</th><th>Sep</th><th>Okt</th><th>Nov</th><th>Dez</th>
+  </tr>
+  <tr>
+    <th>Buchungen</th>
+    {% for sum, count in stat %}<td>{{ count }}</td>{% endfor %}
+  </tr>
+  <tr>
+    <th>Minuten (ø)</th>
+    {% for sum, count in stat %}<td>{{ sum|divide:count|floatformat:1 }}</td>{% endfor %}
+  </tr>
+  <tr>
+    <th>Minuten</th>
+    {% for sum, count in stat %}<td>{{ sum }}</td>{% endfor %}
+  </tr>
+  <tr class="blank"></tr>
+  {% endfor %}
+</table>
+
+{% endblock content %}

app/base/templatetags/utils.py

@@ -25,6 +25,11 @@ def invert(number):
     return - number
 
 
+@register.filter
+def divide(number: 'int|float', other: 'int|float'):
+    return number / (other or 1)
+
+
 @register.filter
 def get_item(dictionary, key):
     return dictionary and dictionary.get(key)

app/base/urls.py

@@ -5,6 +5,7 @@ from django.urls import include, path
 from django.views.generic import RedirectView
 
 from app.base.views.settings import SettingsView
+from app.base.views.dashboard import DashboardView
 from app.base.views.trigger.toggle_checkin import ToggleCheckinView
 from app.base.views.trigger.update_note import UpdateNoteView
 
@@ -14,6 +15,7 @@ urlpatterns = [
     path('login/', LoginView.as_view(), name='login'),
     path('logout/', LogoutView.as_view(next_page='login'), name='logout'),
     path('settings/', SettingsView.as_view(), name='settings'),
+    path('dashboard/', DashboardView.as_view(), name='dashboard'),
     path('users/<int:user_id>/toggle-checkin/',
          ToggleCheckinView.as_view(), name='toggle-checkin'),
     path('users/<int:user_id>/update-note/',

app/base/views/dashboard.py

@@ -0,0 +1,83 @@
+from django.db.models import Q, F, Sum, Count, ExpressionWrapper, IntegerField
+from django.db.models.functions import Substr
+from django.views.generic import TemplateView
+
+from app.base.models import Booking, BookingType
+from app.base.models.trait import Trait
+from app.base.models.trait_mapping import TraitMapping
+from app.base.views.login import LoginRequired
+from app.base.views.model_views.base import ViewOptions
+
+from datetime import date
+from typing import Any
+
+
+class DashboardOptions(ViewOptions, LoginRequired):
+    icon = 'chart-line'
+    title = 'Dashboard'
+
+
+class DashboardView(DashboardOptions, TemplateView):
+    template_name = 'dashboard.html'
+
+    def get_context_data(self, **kwargs) -> 'dict[str, Any]':
+        context = super().get_context_data(**kwargs)
+        book_types = dict(BookingType.objects.values_list('key', 'label'))
+        trait_types = dict(Trait.objects.values_list('key', 'label'))
+
+        # Booking stats
+
+        book_by_type = stats_for_booking('type')
+        book_by_month = {}
+
+        for stat in stats_for_booking('month'):
+            year, month = stat['month'].split('-')
+            if year not in book_by_month:
+                book_by_month[year] = [[0, 0] for x in range(13)]
+            book_by_month[year][0][0] += stat['sum']
+            book_by_month[year][0][1] += stat['count']
+            book_by_month[year][int(month)][0] += stat['sum']
+            book_by_month[year][int(month)][1] += stat['count']
+
+        context['booking'] = {
+            'labels': book_types,
+            'by_type': book_by_type,
+            'by_month': book_by_month,
+        }
+        context['trait'] = {
+            'labels': trait_types,
+            'by_type': stats_for_traits(),
+        }
+        context['head'] = {
+            'bookings': Booking._meta.verbose_name_plural,
+            'booking_types': BookingType._meta.verbose_name_plural,
+            'traits': Trait._meta.verbose_name_plural,
+        }
+
+        return context
+
+
+def stats_for_booking(groupby: str):
+    _Q = Booking.objects.filter(Q(end_time__isnull=False)).annotate(
+        # for whatever reason django uses nano seconds
+        diff=ExpressionWrapper(
+            (F('end_time') - F('begin_time')) / 60_000_000,
+            output_field=IntegerField()),
+    ).filter(diff__lt=1440)  # filter 24+ hours. Probably wrong checkout
+
+    if groupby == 'month':
+        _Q = _Q.annotate(month=Substr('begin_time', 1, 7))  # YYYY-MM
+
+    return _Q.values(groupby).annotate(
+        sum=Sum('diff', output_field=IntegerField()),
+        count=Count(1),
+    ).values(groupby, 'sum', 'count').order_by(groupby)
+
+
+def stats_for_traits():
+    return TraitMapping.objects.filter(
+        Q(valid_from__lte=date.today()),
+        Q(valid_until=None) | Q(valid_until__gte=date.today()),
+    ).values('trait').annotate(
+        count=Count(1),
+    ).values('trait', 'count').order_by('trait')