From 550eb5238802e0d3050c313ee5c519cfe47fb3f5 Mon Sep 17 00:00:00 2001
From: Federico Capoano <nemesis@ninux.org>
Date: Sun, 6 May 2018 21:57:17 +0200
Subject: [PATCH] [models] Added config_modified signal

---
 django_netjsonconfig/base/config.py   | 23 +++++++++++++++++++++++
 django_netjsonconfig/base/template.py |  7 ++++++-
 django_netjsonconfig/signals.py       |  3 +++
 3 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 django_netjsonconfig/signals.py

diff --git a/django_netjsonconfig/base/config.py b/django_netjsonconfig/base/config.py
index 6a07c20..6a32a98 100644
--- a/django_netjsonconfig/base/config.py
+++ b/django_netjsonconfig/base/config.py
@@ -6,6 +6,7 @@
 from sortedm2m.fields import SortedManyToManyField
 
 from .. import settings as app_settings
+from ..signals import config_modified
 from .base import BaseConfig
 
 
@@ -51,6 +52,20 @@ def clean(self):
                 self.set_status_modified(save=False)
                 break
 
+    def save(self, *args, **kwargs):
+        result = super(AbstractConfig, self).save(*args, **kwargs)
+        if not self._state.adding and getattr(self, '_send_config_modified_after_save', False):
+            self._send_config_modified_signal()
+        return result
+
+    def _send_config_modified_signal(self):
+        """
+        sends signal ``config_modified``
+        """
+        config_modified.send(sender=self.__class__,
+                             config=self,
+                             device=self.device)
+
     def _set_status(self, status, save=True):
         self.status = status
         if save:
@@ -58,6 +73,12 @@ def _set_status(self, status, save=True):
 
     def set_status_modified(self, save=True):
         self._set_status('modified', save)
+        if save:
+            self._send_config_modified_signal()
+        else:
+            # set this attribute that will be
+            # checked in the save method
+            self._send_config_modified_after_save = True
 
     def set_status_running(self, save=True):
         self._set_status('running', save)
@@ -208,6 +229,8 @@ def templates_changed(cls, action, instance, **kwargs):
             return
         if instance.status != 'modified':
             instance.set_status_modified()
+        else:
+            instance._send_config_modified_signal()
 
     @classmethod
     def manage_vpn_clients(cls, action, instance, pk_set, **kwargs):
diff --git a/django_netjsonconfig/base/template.py b/django_netjsonconfig/base/template.py
index 010d7d7..e3321ce 100644
--- a/django_netjsonconfig/base/template.py
+++ b/django_netjsonconfig/base/template.py
@@ -76,7 +76,12 @@ def save(self, *args, **kwargs):
         super(AbstractTemplate, self).save(*args, **kwargs)
         # update relations
         if update_related_config_status:
-            self.config_relations.update(status='modified')
+            self._update_related_config_status()
+
+    def _update_related_config_status(self):
+        self.config_relations.update(status='modified')
+        for config in self.config_relations.all():
+            config._send_config_modified_signal()
 
     def clean(self, *args, **kwargs):
         """
diff --git a/django_netjsonconfig/signals.py b/django_netjsonconfig/signals.py
new file mode 100644
index 0000000..e3e91d4
--- /dev/null
+++ b/django_netjsonconfig/signals.py
@@ -0,0 +1,3 @@
+from django.dispatch import Signal
+
+config_modified = Signal(providing_args=['device', 'config'])