RATIONALE
Purpose of this commit is to cleanup main post helpers and have a more easy
and understandable way of calling them.
SUMMARY
We now have two main API methods, based on business flow: either posting
on documents, either sending a mass mailing. Indeed those two flows are
different
* post: create message, then launch notification process by taking into
account subtype, followers, ...
* mail: create mails in batch with recipients being based on template or
given partners. No notifications is involved, only maybe traces if a
mass mailing is linked
Delegate QWeb rendering to the render mixin (i.e. _render_template_qweb_view)
in order to have a single point to forge evaluation context and re-use
existing rendering code.
SPECIFICATIONS
Main API helpers are now
* ``message_post_with_source``: (batch) post on records, using an ir.ui.view
(given a record or its xml id) or a mail.template record (given a record or
its xml id). When using a template, a composer is called to post on each
record (as batch post is not yet supported). When using a view, a direct
call to message_post using the rendered bodies is done, one record at a
time.
* ``message_mail_with_source``: send a mass mailing on records, acting like
invoking the mail composer in mass mode. Same arguments are valid, either
a reference to a view, either a reference to a mail template.
Other helpers are
* ``_message_log_with_view``: (batch) log on records, using an ir.ui.view
to render the body using QWeb (no notification process);
* ``_message_log(_batch)``: (batch) log on records (no notification process);
* ``message_notify``: notify partners on records (creating notifications
specifically for some people while message itself is not displayed in
chatter);
Code migration
* ``message_post_with_template`` in "mass mode": use ``message_mail_with_source``
and set the template record as source;
* ``message_post_with_template`` in "comment" mode: use ``message_post_with_source``
and set the template record as source;
* ``message_post_with_view``: its main usage was to post on a document, in which
case it generally can be replaced by ``message_mail_with_source`` using
the view reference as source;
Task-2710804 (Mail: Clean MailThread Posting API)
Part-of: odoo/odoo#99482
Thibault Delavallée
4775bd93a2