display webhook delivery in admin

Signed-off-by: tdruez <tdruez@aboutcode.org>

Author: tdruez

notification/admin.py

@@ -14,6 +14,7 @@
 from dje.admin import dejacode_site
 from dje.forms import DataspacedAdminForm
 from notification.models import WEBHOOK_EVENTS
+from notification.models import WebhookDelivery
 from notification.models import WebhookSubscription
 
 
@@ -35,6 +36,24 @@ def __init__(self, *args, **kwargs):
         self.fields["event"] = forms.ChoiceField(choices=self.EVENTS)
 
 
+class WebhookDeliveryInline(admin.TabularInline):
+    model = WebhookDelivery
+    fields = ("sent_date", "response_status_code", "delivery_error")
+    readonly_fields = ("sent_date", "response_status_code", "delivery_error")
+    extra = 0
+    can_delete = False
+    show_change_link = False
+    verbose_name_plural = "Last 10 deliveries"
+
+    def has_add_permission(self, request, obj=None):
+        return False
+
+    def get_queryset(self, request):
+        qs = super().get_queryset(request)
+        latest_pks = qs.order_by("-sent_date").values_list("pk", flat=True)[:10]
+        return qs.filter(pk__in=latest_pks).order_by("-sent_date")
+
+
 @admin.register(WebhookSubscription, site=dejacode_site)
 class WebhookSubscriptionAdmin(ProhibitDataspaceLookupMixin, DataspacedAdmin):
     list_display = ("__str__", "event", "target_url", "is_active", "dataspace")
@@ -44,3 +63,4 @@ class WebhookSubscriptionAdmin(ProhibitDataspaceLookupMixin, DataspacedAdmin):
     actions = []
     actions_to_remove = ["copy_to", "compare_with"]
     email_notification_on = ()
+    inlines = [WebhookDeliveryInline]