doc (cli): notification commands documentation.

doc/libervia-cli/notification.rst

@@ -0,0 +1,89 @@
+.. _libervia-cli_notification:
+
+====================================
+notification: notifications handling
+====================================
+
+Notifications can be retrieved, expired or created with the ``notification`` commands.
+
+add
+====
+
+Add and broadcast a new notification. Only admin profiles can add a notification.
+
+It can be used for service announcement, such as planned maintenance.
+
+To make an announcement to all profiles, use the ``-g, --is-global``. Note that such
+global notification aren't deleted when using :ref:`libervia-cli_notification_expire`
+command: you have either to use ``-e EXPIRE_AT, --expire-at EXPIRE_AT`` to
+set an expiration date, or to delete them manually with
+:ref:`libervia-cli_notification_delete`.
+
+example
+-------
+
+Add a global service announcement to indicate that the server will be shut down. The
+expiration date is set so that the notification will be expired after expected end of
+maintenance::
+
+  $ li notification add service "Server will be shut down for maintenance." -P HIGH -g -e "2023-10-22"
+
+get
+===
+
+Retrieve notification for current profile. If ``-f, --follow`` argument is used, the CLI
+will continue to run and show any new incoming notification.
+
+examples
+--------
+
+Louise wishes to obtain her current notifications and display any new notifications as
+they are issued::
+
+  $ li notification get -f
+
+Louise wants to see all her chat notifications which are at least of high priority (this
+includes urgent ones)::
+
+  $ li notification get -t chat -P HIGH
+
+.. _libervia-cli_notification_delete:
+
+delete
+======
+
+Delete a notification by its ID. The notification must belong to the profile doing the
+request.
+
+If ``-g, --is-global`` is used, a global notification is to be deleted. Only admins can
+delete a global notification.
+
+example
+-------
+
+Louise (who is an admin) wants to delete a previous global service announcement with ID ``123``::
+
+  $ li notification delete -g 123
+
+.. _libervia-cli_notification_expire:
+
+expire
+=======
+
+Delete expired notification (the ones with an expiration date set).
+
+If ``-l TIME_PATTERN, --limit TIME_PATTERN`` is used, also delete notification which have
+been **created** before the given limit. Some notifications can't be deleted this way: if
+they are global, or if they require a user action. Using ``now`` as time pattern will
+clear all the notifications that can be deleted.
+
+By default, only notifications of requesting profile are deleted (except for expired ones
+which are always deleted). If ``-a, --all`` is used, notification for all profiles can be
+deleted. This option is notably useful to schedule automatic notification cleaning.
+
+example
+-------
+
+Louise want to expire notification for all profiles that are older than 7 days::
+
+  $ li notification expire -a -l "7 days ago"