Add admin dashboard with KPIs

claims/views.py

@@ -1,8 +1,12 @@
+from datetime import timedelta
+from decimal import Decimal
+
 from django.conf import settings
 from django.contrib import messages
 from django.contrib.auth import get_user_model
 from django.contrib.auth.models import Permission
 from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin
+from django.db.models import Sum
 from django.forms import formset_factory
 from django.shortcuts import get_object_or_404, redirect, render
 from django.urls import reverse
@@ -136,8 +140,8 @@ class SubmitClaimView(View):
         )
 
 
-class ClaimAdminListView(LoginRequiredMixin, PermissionRequiredMixin, ListView):
-    template_name = "claims/admin_list.html"
+class ClaimDashboardView(LoginRequiredMixin, PermissionRequiredMixin, ListView):
+    template_name = "claims/dashboard.html"
     context_object_name = "claims"
     permission_required = "claims.view_claim"
 
@@ -159,6 +163,12 @@ class ClaimAdminListView(LoginRequiredMixin, PermissionRequiredMixin, ListView):
         context["decision_choices"] = ClaimDecisionForm().fields["action"].choices
         context["can_change"] = self.request.user.has_perm("claims.change_claim")
         context["payments_enabled"] = getattr(settings, "CLAIMS_ENABLE_INTERNAL_PAYMENTS", False)
+        context["summary"] = self._build_summary()
+        context["recent_claims"] = (
+            Claim.objects.select_related("project")
+            .prefetch_related("logs__performed_by")
+            .order_by("-created_at")[:5]
+        )
         return context
 
     def post(self, request, *args, **kwargs):
@@ -232,6 +242,29 @@ class ClaimAdminListView(LoginRequiredMixin, PermissionRequiredMixin, ListView):
         messages.success(request, _("%(claim)s markerades som betald.") % {"claim": claim})
         return redirect(request.get_full_path())
 
+    def _build_summary(self):
+        now = timezone.now()
+        last_week = now - timedelta(days=7)
+        pending_qs = Claim.objects.filter(status=Claim.Status.PENDING)
+        approved_qs = Claim.objects.filter(status=Claim.Status.APPROVED)
+        rejected_qs = Claim.objects.filter(status=Claim.Status.REJECTED)
+        ready_to_pay_qs = approved_qs.filter(paid_at__isnull=True)
+
+        def _sum(qs):
+            return qs.aggregate(total=Sum("amount"))["total"] or Decimal("0")
+
+        return {
+            "total_claims": Claim.objects.count(),
+            "last_week_claims": Claim.objects.filter(created_at__gte=last_week).count(),
+            "pending_count": pending_qs.count(),
+            "approved_count": approved_qs.count(),
+            "rejected_count": rejected_qs.count(),
+            "ready_to_pay": ready_to_pay_qs.count(),
+            "pending_amount": _sum(pending_qs),
+            "approved_amount": _sum(approved_qs),
+            "paid_amount": _sum(approved_qs.filter(paid_at__isnull=False)),
+        }
+
 
 class ClaimExportMenuView(LoginRequiredMixin, PermissionRequiredMixin, TemplateView):
     template_name = "claims/export_placeholder.html"