From caedb09d8fff74484d531721ef161b4233d873ff Mon Sep 17 00:00:00 2001
From: Gabriel Detraz <detraz@crans.org>
Date: Thu, 15 Nov 2018 17:14:51 +0100
Subject: [PATCH] Fonction de check de l'alias via smtp

---
 re2o/base.py    | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 users/models.py |  8 ++++++--
 2 files changed, 54 insertions(+), 2 deletions(-)
 create mode 100644 re2o/base.py

diff --git a/re2o/base.py b/re2o/base.py
new file mode 100644
index 00000000..539cc30f
--- /dev/null
+++ b/re2o/base.py
@@ -0,0 +1,48 @@
+# -*- mode: python; coding: utf-8 -*-
+# Re2o est un logiciel d'administration développé initiallement au rezometz. Il
+# se veut agnostique au réseau considéré, de manière à être installable en
+# quelques clics.
+#
+# Copyright © 2018  Gabriel Détraz
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 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 Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# -*- coding: utf-8 -*-
+"""
+Regroupe les fonctions transversales utiles
+
+Et non corrélées/dépendantes des autres applications
+"""
+
+import smtplib
+
+from django.utils.translation import ugettext_lazy as _
+
+from re2o.settings import EMAIL_HOST
+
+
+def smtp_check(local_part):
+    """Return True if the local_part is already taken
+       False if available"""
+    try:
+        srv = smtplib.SMTP(EMAIL_HOST)
+        srv.putcmd("vrfy", local_part)
+        reply_code = srv.getreply()[0]
+        srv.close()
+        if reply_code in [250, 252]:
+            return True, _("This domain is already taken")
+    except:
+        return True, _("Smtp unreachable")
+    return False, None
diff --git a/users/models.py b/users/models.py
index 63d0a875..2d271b3e 100755
--- a/users/models.py
+++ b/users/models.py
@@ -81,6 +81,7 @@ from re2o.settings import LDAP, GID_RANGES, UID_RANGES
 from re2o.login import hashNT
 from re2o.field_permissions import FieldPermissionModelMixin
 from re2o.mixins import AclMixin, RevMixin
+from re2o.base import smtp_check
 
 from cotisations.models import Cotisation, Facture, Paiement, Vente
 from machines.models import Domain, Interface, Machine, regen
@@ -1889,6 +1890,9 @@ class EMailAddress(RevMixin, AclMixin, models.Model):
 
     def clean(self, *args, **kwargs):
         self.local_part = self.local_part.lower()
-        if "@" in self.local_part:
-            raise ValidationError(_("The local part must not contain @."))
+        if "@" in self.local_part or "+" in self.local_part:
+            raise ValidationError(_("The local part must not contain @ or +."))
+        result, reason = smtp_check(self.local_part)
+        if result:
+            raise ValidationError(reason)
         super(EMailAddress, self).clean(*args, **kwargs)