feat(kfet): Add a summary of the account balances

kfet/templates/kfet/account.html

@@ -31,6 +31,28 @@
   {% endif %}
 </div>
 
+<aside>
+  <div class="heading">
+    {{ positive_count }}
+    <span class="sub">compte{{ positive_count|pluralize }} en positif</span>
+  </div>
+  <div class="heading">
+    {{ positives_sum|floatformat:2 }}€
+    <span class="sub">de positif total</span>
+  </div>
+</aside>
+
+<aside>
+  <div class="heading">
+    {{ negative_count }}
+    <span class="sub">compte{{ negative_count|pluralize }} en négatif</span>
+  </div>
+  <div class="heading">
+    {{ negatives_sum|floatformat:2 }}€
+    <span class="sub">de négatif total</span>
+  </div>
+</aside>
+
 {% endblock %}
 
 {% block main %}

kfet/views.py

@@ -184,7 +184,16 @@ class DemandeSoireeView(FormView):
 @teamkfet_required
 def account(request):
     accounts = Account.objects.select_related("cofprofile__user").order_by("trigramme")
-    return render(request, "kfet/account.html", {"accounts": accounts})
+    positive_accounts = Account.objects.filter(balance__gte=0)
+    negative_accounts = Account.objects.filter(balance__lt=0)
+
+    return render(request, "kfet/account.html", {
+        "accounts": accounts,
+        "positive_count": positive_accounts.count(),
+        "positives_sum": sum(acc.balance for acc in positive_accounts),
+        "negative_count": negative_accounts.count(),
+        "negatives_sum": sum(acc.balance for acc in negative_accounts),
+    })
 
 
 @login_required