core/counter: add generic operation logs and implements it for Sellings and Refilling deletions

counter/__init__.py

@@ -1,7 +1,8 @@
 # -*- coding:utf-8 -*
 #
-# Copyright 2016,2017
+# Copyright 2016,2017,2019
 # - Skia <skia@libskia.so>
+# - Sli <antoine@bartuccio.fr>
 #
 # Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
 # http://ae.utbm.fr.
@@ -21,3 +22,5 @@
 # Place - Suite 330, Boston, MA 02111-1307, USA.
 #
 #
+
+default_app_config = "counter.app.CounterConfig"

counter/app.py

@@ -0,0 +1,34 @@
+# -*- coding:utf-8 -*
+#
+# Copyright 2019
+# - Sli <antoine@bartuccio.fr>
+#
+# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
+# http://ae.utbm.fr.
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License a published by the Free Software
+# Foundation; either version 3 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Sofware Foundation, Inc., 59 Temple
+# Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+#
+
+from django.apps import AppConfig
+from django.utils.translation import ugettext_lazy as _
+
+
+class CounterConfig(AppConfig):
+    name = "counter"
+    verbose_name = _("counter")
+
+    def ready(self):
+        import counter.signals

counter/signals.py

@@ -0,0 +1,65 @@
+# -*- coding:utf-8 -*
+#
+# Copyright 2019
+# - Sli <antoine@bartuccio.fr>
+#
+# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
+# http://ae.utbm.fr.
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License a published by the Free Software
+# Foundation; either version 3 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Sofware Foundation, Inc., 59 Temple
+# Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+#
+
+from django.db.models.signals import pre_delete
+from django.dispatch import receiver
+from django.conf import settings
+
+from core.middleware import RequestMiddleware
+from core.models import OperationLog
+
+from counter.models import Selling, Refilling, Counter
+
+
+def write_log(instance, operation_type):
+    def get_user():
+        request = RequestMiddleware(get_response=None).thread_local.current_request
+
+        # Get a random barmen if deletion is from a counter
+        session_token = request.session.get("counter_token", None)
+        if session_token:
+            counter = Counter.objects.filter(token=session_token).first()
+            if counter:
+                return counter.get_random_barman()
+
+        # Get the current logged user if not from a counter
+        if request.user and not request.user.is_anonymous:
+            return request.user
+
+        # Return None by default
+        return None
+
+    log = OperationLog(
+        label=str(instance), operator=get_user(), operation_type=operation_type,
+    ).save()
+
+
+@receiver(pre_delete, sender=Refilling, dispatch_uid="write_log_refilling_deletion")
+def write_log_refilling_deletion(sender, instance, **kwargs):
+    write_log(instance, "REFILLING_DELETION")
+
+
+@receiver(pre_delete, sender=Selling, dispatch_uid="write_log_refilling_deletion")
+def write_log_selling_deletion(sender, instance, **kwargs):
+    write_log(instance, "SELLING_DELETION")