feat: Add basic metrics

src/fellchensammlung/tools/metrics.py

@@ -0,0 +1,22 @@
+from fellchensammlung.models import User, AdoptionNotice, AdoptionNoticeStatus
+
+
+def gather_metrics_data():
+    """USERS"""
+    num_user = User.objects.count()
+    num_staff = User.objects.filter(is_staff=True).count()
+
+    """Adoption notices"""
+    num_adoption_notices = AdoptionNotice.objects.count()
+    num_adoption_notices_active = AdoptionNotice.objects.filter(adoptionnoticestatus__major_status=AdoptionNoticeStatus.ACTIVE).count()
+
+    adoption_notices_without_location = AdoptionNotice.objects.filter(location__isnull=True).count()
+    data = {
+        'users': num_user,
+        'staff': num_staff,
+
+        'adoption_notices': num_adoption_notices,
+        'adoption_notices_active': num_adoption_notices_active,
+        'adoption_notices_without_location': adoption_notices_without_location
+    }
+    return data

src/fellchensammlung/urls.py

@@ -9,6 +9,7 @@ from . import views
 urlpatterns = [
     path("", views.index, name="index"),
     path("rss/", LatestAdoptionNoticesFeed(), name="rss"),
+    path("metrics/", views.metrics, name="metrics"),
     # ex: /animal/5/
     path("tier/<int:animal_id>/", views.animal_detail, name="animal-detail"),
     # ex: /animal/5/edit

src/fellchensammlung/views.py

@@ -1,6 +1,6 @@
 import logging
 
-from django.http import HttpResponseRedirect
+from django.http import HttpResponseRedirect, JsonResponse
 from django.shortcuts import render, redirect
 from django.urls import reverse
 from django.contrib.auth.decorators import login_required
@@ -17,6 +17,7 @@ from .forms import AdoptionNoticeForm, ImageForm, ReportAdoptionNoticeForm, Comm
     AdoptionNoticeSearchForm
 from .models import Language, Announcement
 from .tools.geo import GeoAPI
+from .tools.metrics import gather_metrics_data
 
 
 def index(request):
@@ -298,3 +299,8 @@ def modqueue(request):
     open_reports = Report.objects.filter(status=Report.WAITING)
     context = {"reports": open_reports}
     return render(request, 'fellchensammlung/modqueue.html', context=context)
+
+
+def metrics(request):
+    data = gather_metrics_data()
+    return JsonResponse(data)