Remove unused variable

kfet/templates/kfet/article.html

@@ -25,6 +25,21 @@
   </a>
 </div>
 
+<aside>
+  <div class="heading">
+    <span>Export des ventes</span>
+  </div>
+
+  <div class="buttons">
+    <a class="btn btn-primary" href="{% url 'kfet.purchases' 6 %}">
+      6 derniers mois
+    </a>
+    <a class="btn btn-primary" href="{% url 'kfet.purchases' %}">
+      12 derniers mois
+    </a>
+  </div>
+</aside>
+
 {% endblock %}
 
 {% block main %}

kfet/templates/kfet/base_nav.html

@@ -88,6 +88,7 @@
           <li><a href="{% url 'kfet.article' %}">Articles</a></li>
           <li><a href="{% url 'kfet.inventory' %}">Inventaires</a></li>
           <li><a href="{% url 'kfet.order' %}">Commandes</a></li>
+          <li><a href="{% url 'kfet.purchases' %}">Export des ventes</a></li>
           {% if user.username != 'kfet_genericteam' %}
           <li class="divider"></li>
           <li>

kfet/urls.py

@@ -236,6 +236,13 @@ urlpatterns = [
         "k-psul/get_settings", views.kpsul_get_settings, name="kfet.kpsul.get_settings"
     ),
     # -----
+    # Sales history urls
+    # -----
+    path("purchases", views.SalesStatList.as_view(), name="kfet.purchases"),
+    path(
+        "purchases/<int:n_months>", views.SalesStatList.as_view(), name="kfet.purchases"
+    ),
+    # -----
     # JSON urls
     # -----
     path("history.json", views.history_json, name="kfet.history.json"),

kfet/views.py

@@ -1,3 +1,4 @@
+import csv
 import heapq
 import statistics
 from collections import defaultdict
@@ -12,12 +13,13 @@ from django.contrib.auth.decorators import login_required, permission_required
 from django.contrib.auth.mixins import PermissionRequiredMixin
 from django.contrib.auth.models import Permission, User
 from django.contrib.messages.views import SuccessMessageMixin
-from django.core.exceptions import SuspiciousOperation, ValidationError
+from django.core.exceptions import SuspiciousOperation
 from django.db import transaction
 from django.db.models import Count, F, Max, OuterRef, Prefetch, Q, Subquery, Sum
 from django.forms import ValidationError, formset_factory
 from django.http import (
     Http404,
+    HttpResponse,
     HttpResponseBadRequest,
     HttpResponseForbidden,
     JsonResponse,
@@ -29,6 +31,7 @@ from django.utils.decorators import method_decorator
 from django.views.generic import DetailView, FormView, ListView, TemplateView
 from django.views.generic.detail import BaseDetailView
 from django.views.generic.edit import CreateView, DeleteView, UpdateView
+from django.views.generic.list import BaseListView
 
 from gestioncof.models import CofProfile
 from kfet import KFET_DELETED_TRIGRAMME, consumers
@@ -2451,6 +2454,65 @@ class ScaleMixin(object):
         return {"labels": self.scale.get_labels()}
 
 
+# ------------------------
+# Export des ventes en CSV
+# ------------------------
+
+
+@method_decorator(teamkfet_required, name="dispatch")
+class SalesStatList(BaseListView):
+    model = Operation
+
+    def get_queryset(self):
+        return (
+            super()
+            .get_queryset()
+            .filter(type=Operation.PURCHASE, canceled_at=None, article__isnull=False)
+            .values_list("article__name")
+            .annotate(Sum("article_nb"))
+        )
+
+    def get_context_data(self, **kwargs):
+        ctx = super().get_context_data(**kwargs)
+        scale = MonthScale(n_steps=self.kwargs.get("n_months", 12), last=True)
+        articles = list(Article.objects.order_by("name"))
+        indexes = {a.name: index for index, a in enumerate(articles)}
+        ventes = scale.chunkify_qs(self.get_queryset(), field="group__at")
+
+        ctx["header"] = ["Mois"] + [a.name for a in articles]
+        ctx["ventes"] = []
+        ctx["total"] = [0] * len(articles)
+
+        labels = scale.get_labels()
+
+        for v in ventes:
+            m_ventes = [0] * len(articles)
+            for (a_name, nb_ventes) in v:
+                index = indexes[a_name]
+                m_ventes[index] = nb_ventes
+                ctx["total"][index] += nb_ventes
+
+            ctx["ventes"].append([labels.pop(0)] + m_ventes)
+
+        return ctx
+
+    def render_to_response(self, context):
+        response = HttpResponse(content_type="text/csv")
+        response["Content-Disposition"] = 'attachment; filename="historique_ventes.csv"'
+
+        writer = csv.writer(response)
+        writer.writerow(context["header"])
+
+        # On écrit chaque mois
+        for line in context["ventes"]:
+            writer.writerow(line)
+
+        writer.writerow([])
+        writer.writerow(["Total"] + context["total"])
+
+        return response
+
+
 # -----------------------
 # Evolution Balance perso
 # -----------------------