Add option enabling regular users to take a disabled user's room

preferences/locale/fr/LC_MESSAGES/django.po

@@ -268,6 +268,10 @@ msgstr "Les utilisateurs peuvent créer un adhérent."
 msgid "Users can edit their shell."
 msgstr "Les utilisateurs peuvent modifier leur interface en ligne de commande."
 
+#: preferences/models.py:92
+msgid "Users can select a room occupied by a user with a disabled connection."
+msgstr "Les utilisateurs peuvent sélectionner la chambre d'un adhérent dont la connexion est désactivée."
+
 #: preferences/models.py:90
 msgid "Users can edit their room."
 msgstr "Les utilisateurs peuvent modifier leur chambre."
@@ -1111,6 +1115,10 @@ msgstr "Les utilisateurs peuvent modifier leur interface en ligne de commande"
 msgid "Users can edit their room"
 msgstr "Les utilisateurs peuvent modifier leur chambre"
 
+#: preferences/templates/preferences/display_preferences.html:144
+msgid "Users can select a room occupied by a user with a disabled connection"
+msgstr "Les utilisateurs peuvent sélectionner la chambre d'un adhérent dont la connexion est désactivée"
+
 #: preferences/templates/preferences/display_preferences.html:154
 msgid "GPG fingerprint field"
 msgstr "Champ empreinte GPG"

preferences/migrations/0068_optionaluser_self_force_move_disabled_user_room.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.28 on 2020-04-15 16:35
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('preferences', '0067_auto_20191120_0159'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='optionaluser',
+            name='self_force_move_disabled_user_room',
+            field=models.BooleanField(default=False, help_text='Users can select a room occupied by a user with a dissabled connection.'),
+        ),
+    ]

preferences/models.py

@@ -89,6 +89,9 @@ class OptionalUser(AclMixin, PreferencesModel):
     self_change_room = models.BooleanField(
         default=False, help_text=_("Users can edit their room.")
     )
+    self_force_move_disabled_user_room = models.BooleanField(
+        default=False, help_text=_("Users can select a room occupied by a user with a disabled connection.")
+    )
     local_email_accounts_enabled = models.BooleanField(
         default=False, help_text=_("Enable local email accounts for users.")
     )

preferences/templates/preferences/display_preferences.html

@@ -147,10 +147,12 @@ with this program; if not, write to the Free Software Foundation, Inc.,
                 <tr>
                     <th>{% trans "Users can edit their room" %}</th>
                     <td>{{ useroptions.self_change_room|tick }}</td>
-                    <th>{% trans "Telephone number required" %}</th>
-                    <td>{{ useroptions.is_tel_mandatory|tick }}</td>
+                    <th>{% trans "Users can select a room occupied by a user with a disabled connection" %}</th>
+                    <td>{{ useroptions.self_force_move_disabled_user_room|tick }}</td>
                 </tr>
                 <tr>
+                    <th>{% trans "Telephone number required" %}</th>
+                    <td>{{ useroptions.is_tel_mandatory|tick }}</td>
                     <th>{% trans "GPG fingerprint field" %}</th>
                     <td>{{ useroptions.gpg_fingerprint|tick }}</td>
                 </tr>

users/forms.py

@@ -351,6 +351,29 @@ class AdherentForm(FormRevMixin, FieldPermissionFormMixin, ModelForm):
         label=_("Force the move?"), initial=False, required=False
     )
 
+    def clean(self):
+        # Handle case where regular users can force move
+        can_force_move = OptionalUser.get_cached_value("self_force_move_disabled_user_room")
+        if not can_force_move:
+            return super(AdherentForm, self).clean()
+
+        # Ensure the user entered a proper room
+        room = self.cleaned_data.get("room")
+        if not room:
+            return super(AdherentForm, self).clean()
+
+        try:
+            # If a user already is register for this room
+            # but their connection has expired, allow force move
+            user = Adherent.objects.get(room=room)
+            if user and not user.is_connected():
+                remove_user_room(room)
+        except Adherent.DoesNotExist:
+            pass
+
+        # Run standard clean process
+        return super(AdherentForm, self).clean()
+
     def clean_email(self):
         if not OptionalUser.objects.first().local_email_domain in self.cleaned_data.get(
             "email"