added logging for evidence tag changes

evidence/forms.py

@@ -10,6 +10,7 @@ from device.models import Device
 from evidence.parse import Build
 from evidence.models import SystemProperty, UserProperty
 from utils.save_snapshots import move_json, save_in_disk
+from action.models import DeviceLog
 
 
 class UploadForm(forms.Form):
@@ -98,19 +99,31 @@ class UserTagForm(forms.Form):
             return
 
         if self.instance:
+            old_value = self.instance.value
             if not self.tag:
+                message =_("<Deleted> Evidence Tag. Old Value: '{}'").format(old_value)
                 self.instance.delete()
-            self.instance.value = self.tag
-            self.instance.save()
-            return
+            else:
+                self.instance.value = self.tag
+                self.instance.save()
+                if old_value != self.tag:
+                    message=_("<Updated> Evidence Tag. Old Value: '{}'. New Value: '{}'").format(old_value, self.tag)
+        else:
+            message =_("<Created> Evidence Tag. Value: '{}'").format(self.tag)
+            SystemProperty.objects.create(
+                uuid=self.uuid,
+                key='CUSTOM_ID',
+                value=self.tag,
+                owner=self.user.institution,
+                user=self.user
+            )
         
-        SystemProperty.objects.create(
-            uuid=self.uuid,
-            key='CUSTOM_ID',
-            value=self.tag,
-            owner=self.user.institution,
-            user=self.user
-        )
+        DeviceLog.objects.create(
+                snapshot_uuid=self.uuid,
+                event= message,
+                user=self.user,
+                institution=self.user.institution
+            )
 
 
 class ImportForm(forms.Form):

evidence/templates/ev_details.html

@@ -94,7 +94,7 @@
 	    </div>
 	    {% if form.tag.value %}
 	    <div class="col-1">
-	      <a class="btn btn-yellow" href="{% url 'device:delete_user_property' form.pk %}">{% translate "Delete" %}</a>
+	      <a class="btn btn-yellow" href="{% url 'evidence:delete_tag' form.pk %}">{% translate "Delete" %}</a>
 	    </div>
 	    {% endif %}
 	  </div>

evidence/urls.py

@@ -20,4 +20,5 @@ urlpatterns = [
     path("<uuid:pk>", views.EvidenceView.as_view(), name="details"),
     path("<uuid:pk>/eraseserver", views.EraseServerView.as_view(), name="erase_server"),
     path("<uuid:pk>/download", views.DownloadEvidenceView.as_view(), name="download"),
+    path("tag/<str:pk>/delete", views.DeleteEvidenceTagView.as_view(), name="delete_tag"),
 ]

evidence/views.py

@@ -12,6 +12,7 @@ from django.views.generic.edit import (
     FormView,
 )
 
+from action.models import DeviceLog
 from dashboard.mixins import  DashboardView, Http403
 from evidence.models import SystemProperty, UserProperty, Evidence
 from evidence.forms import (
@@ -184,3 +185,35 @@ class EraseServerView(DashboardView, FormView):
     def get_success_url(self):
         success_url = reverse_lazy('evidence:details', args=[self.pk])
         return success_url
+
+
+class DeleteEvidenceTagView(DashboardView, DeleteView):
+    model = SystemProperty
+
+    def get_queryset(self):
+        # only those with 'CUSTOM_ID'
+        return SystemProperty.objects.filter(owner=self.request.user.institution, key='CUSTOM_ID')
+
+    def get(self, request, *args, **kwargs):
+        self.object = self.get_object()
+
+        message = _("<Deleted> Evidence Tag: {}").format(self.object.value) 
+        DeviceLog.objects.create(
+            snapshot_uuid=self.object.uuid,
+            event=message,
+            user=self.request.user,
+            institution=self.request.user.institution
+        )
+        self.object.delete()        
+
+        messages.info(self.request, _("Evicende Tag deleted successfully."))
+        return self.handle_success()
+
+    def handle_success(self):
+        return redirect(self.get_success_url())
+
+    def get_success_url(self):
+        return self.request.META.get(
+            'HTTP_REFERER', 
+            reverse_lazy('evidence:details', args=[self.object.uuid])
+        )