Do not allow changing the start or end *date* of a shift template because shift…

Do not allow changing the start or end *date* of a shift template because shift update won't work as expected. Changing times is still allowed.

intercoop_addons/coop_shift/i18n/fr.po

@@ -409,6 +409,13 @@ msgid "Cancelled"
 msgstr "Annulé"
 
 #. module: coop_shift
+#: code:addons/coop_shift/model/shift_template.py:527
+#: code:addons/coop_shift/model/shift_template.py:534
+#, python-format
+msgid "Cannot change the date of an existing shift template. Delete and create a new template instead."
+msgstr "Il n'est pas possible de modifier la date d'un créneau existant. Vous pouvez modifier l'heure uniquement. Veuillez supprimer et créer un nouveau créneau pour modifier les dates."
+
+#. module: coop_shift
 #: model:ir.model.fields,field_description:coop_shift.field_shift_shift_event_type_id
 #: model:ir.model.fields,field_description:coop_shift.field_shift_shift_shift_type_id
 #: model:ir.model.fields,field_description:coop_shift.field_shift_template_shift_type_id
@@ -1825,7 +1832,7 @@ msgstr "Participant(e)"
 #: model:ir.ui.view,arch_db:coop_shift.view_shift_template_registration_line_search
 #: model:ir.ui.view,arch_db:coop_shift.view_template_registration_search
 msgid "Partner"
-msgstr "Coopérateur
+msgstr "Coopérateur"
 
 #. module: coop_shift
 #: model:ir.model.fields,field_description:coop_shift.field_shift_template_registration_line_is_past

intercoop_addons/coop_shift/model/shift_template.py

@@ -520,6 +520,20 @@ class ShiftTemplate(models.Model):
         if 'updated_fields' not in vals.keys() and len(self.shift_ids):
             vals['updated_fields'] = str(vals)
 
+        if 'start_datetime' in vals and self.start_datetime is not None:
+            new_date = datetime.date(datetime.strptime(vals['start_datetime'], "%Y-%m-%d %H:%M:%S"))
+            current_date = datetime.date(datetime.strptime(self.start_datetime, "%Y-%m-%d %H:%M:%S"))
+            if new_date != current_date:
+                raise UserError(_(
+                    "Cannot change the date of an existing shift template. Delete and create a new template instead."))
+
+        if 'end_datetime' in vals and self.end_datetime is not None:
+            new_date = datetime.date(datetime.strptime(vals['end_datetime'], "%Y-%m-%d %H:%M:%S"))
+            current_date = datetime.date(datetime.strptime(self.end_datetime, "%Y-%m-%d %H:%M:%S"))
+            if new_date != current_date:
+                raise UserError(_(
+                    "Cannot change the date of an existing shift template. Delete and create a new template instead."))
+
         if 'user_ids' in vals and 'updated_fields' in vals \
                 and len(vals.keys()) <= 2:
             self.update_shift(vals)