Notes
=====
There are three main permissions for this plugin: ``TICKET_VIEW_REPORTER``,
``TICKET_VIEW_CC``, and ``TICKET_VIEW_OWNER``. ``TICKET_VIEW_SELF`` is an
alias for all three of these.

With each permission, users will only be able to see tickets where they are
the person mentioned in the permission. So if a user has
``TICKET_VIEW_REPORTER``, they can only see tickets they reported. For
``TICKET_VIEW_CC``, they just have to be included in the CC list.

There are also group-based permissions: ``TICKET_VIEW_REPORTER_GROUP``,
``TICKET_VIEW_CC_GROUP``, and ``TICKET_VIEW_OWNER_GROUP``. These work in a
similar way to their non-group counterparts, except that you are granted
access if you share a group with the target user. For example, if ticket 1 was
reported by Allan, and Allan and Bob are both in the group company_foo, and
Bob has ``TICKET_VIEW_REPORTER_GROUP``, then Bob will be able to see ticket 1
since he shares a group with the reporter. Each group-based permission is also
an alias for the normal one, so you do not have to grant both.
``TICKET_VIEW_GROUP`` is an alias for all the group-based permissions (and
therefore all the normal ones as well).

These extra permissions can only deny access, not allow it. This means the
user must still have ``TICKET_VIEW`` granted as normal.

Finally, users with ``TRAC_ADMIN`` will not be restricted by this plugin.
The meta-user "anonymous" also cannot be restricted by this plugin, as their
identity isn't known to be checked. Be sure to not grant ``TICKET_VIEW`` to
anonymous, or unauthenticated users will be able to see all tickets.

Configuration
=============
All configuration options go in the ``[privatetickets]`` section.

``group_blacklist``
    Groups to ignore for the purposes of the ``*_GROUP`` permissions.
    
    Defaults to "``anonymous, authenticated``"

You must also add ``PrivateTicketsPolicy`` to your ``permission_policies``
setting in trac.ini. It must be before the ``DefaultPermissionPolicy``. See
below for an example if you don't have any other policies.
    
Example
=======
An example configuration::

    [privatetickets]
    group_blacklist = anonymous, authenticated, labusers
    
    [components]
    privatetickets.* = enabled
    
    [trac]
    permission_policies = PrivateTicketsPolicy, DefaultPermissionPolicy, LegacyAttachmentPolicy