[FIX] website_slides: Raise error if not responsible on invite

Steps to reproduce:

- Install `E-learning` module
- Create a user X with only "Officer" as rights for `E-learning`
- Login with user X
- Go to `E-learning` and open any course
- Ensure that the user X is not the responsible and that the course
  enroll policy is set to "On invitation"
- Invite any user not already a member

Issue:

  No user was invited (not added as member) and no warning message
  raised.

Cause:

  Due to the ir.rule "Channel: officer: create/write own only", the
  `Officer` user can only edit (and therefore invite members) on
  courses where he is responsible.

Solution:

  Add a context key to the 'Invite' buttons in the `Form` and `Kanban`
  views of `slide.channel` model so that we can raise an error only in
  these flows if the user does not have the rights to invite members.

opw-3133733

closes odoo/odoo#111642

Signed-off-by: Warnon Aurélien (awa) <awa@odoo.com>

addons/website_slides/i18n/website_slides.pot

@@ -5150,6 +5150,14 @@ msgstr ""
 msgid "Yes"
 msgstr ""
 
+#. module: website_slides
+#: code:addons/website_slides/wizard/slide_channel_invite.py:0
+#, python-format
+msgid ""
+"You are not allowed to add members to this course. Please contact the course"
+" responsible or an administrator."
+msgstr ""
+
 #. module: website_slides
 #. openerp-web
 #: code:addons/website_slides/static/src/js/tours/slides_tour.js:0

addons/website_slides/wizard/slide_channel_invite.py

@@ -5,7 +5,7 @@ import logging
 import re
 
 from odoo import api, fields, models, _
-from odoo.exceptions import UserError
+from odoo.exceptions import UserError, AccessError
 from odoo.tools import formataddr
 
 _logger = logging.getLogger(__name__)
@@ -78,6 +78,12 @@ class SlideChannelInvite(models.TransientModel):
         if not self.env.user.email:
             raise UserError(_("Unable to post message, please configure the sender's email address."))
 
+        try:
+            self.channel_id.check_access_rights('write')
+            self.channel_id.check_access_rule('write')
+        except AccessError:
+            raise AccessError(_('You are not allowed to add members to this course. Please contact the course responsible or an administrator.'))
+
         mail_values = []
         for partner_id in self.partner_ids:
             slide_channel_partner = self.channel_id._action_add_members(partner_id)