# BEGIN LICENSE BLOCK
# 
# Copyright (c) 1996-2003 Jesse Vincent <jesse@bestpractical.com>
# 
# (Except where explictly superceded by other copyright notices)
# 
# This work is made available to you under the terms of Version 2 of
# the GNU General Public License. A copy of that license should have
# been provided with this software, but in any event can be snarfed
# from www.gnu.org.
# 
# This work is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
# 
# Unless otherwise specified, all modifications, corrections or
# extensions to this work which alter its source code become the
# property of Best Practical Solutions, LLC when submitted for
# inclusion in the work.
#
# This has been edited by Stewart James (stewart.james@vu.edu.au)
# and is based on MailFrom.pm provided by Jesse Vincent.
# 
# 
# END LICENSE BLOCK
package RT::Interface::Email::Auth::LDAPMail;
use RT::Interface::Email qw(ParseSenderAddressFromHead MailError);

# This is what the ordinary, non-enhanced gateway does at the moment.

sub GetCurrentUser {
    my %args = ( Message     => undef,
                 CurrentUser => undef,
                 AuthLevel   => undef,
                 Ticket      => undef,
                 Queue       => undef,
                 Action      => undef,
                 @_ );

    # We don't need to do any external lookups
    my ( $Address, $Name ) =
      ParseSenderAddressFromHead( $args{'Message'}->head );
    my $CurrentUser = RT::CurrentUser->new();
    $CurrentUser->LoadByEmail($Address);

    unless ( $CurrentUser->Id ) {
        $CurrentUser->LoadByName($Address);
    }

    # If the user can't be loaded, we may need to create one.
    if ( $CurrentUser->Id ) {

        return ( $CurrentUser, 1 );

    }
    my $unpriv = RT::Group->new($RT::SystemUser);
    $unpriv->LoadSystemInternalGroup('Unprivileged');
    unless ( $unpriv->Id ) {
        $RT::Logger->crit(
             "Auth::LDAPMail couldn't find the 'Unprivileged' internal group" );
        return ( $args{'CurrentUser'}, -1 );
    }
    my $everyone = RT::Group->new($RT::SystemUser);
    $everyone->LoadSystemInternalGroup('Everyone');
    unless ( $everyone->Id ) {
        $RT::Logger->crit(
                  "Auth::LDAPMail couldn't find the 'Everyone' internal group");
        return ( $args{'CurrentUser'}, -1 );
    }

    # but before we do that, we need to make sure that the created user would have the right
    # to do what we're doing.
    if ( $args{'Ticket'} && $args{'Ticket'}->Id ) {

        # We have a ticket. that means we're commenting or corresponding
        if ( $args{'Action'} =~ /^comment$/i ) {

            # check to see whether "Everybody" or "Unprivileged users" can comment on tickets
            unless ( $everyone->PrincipalObj->HasRight(
                                                      Object => $args{'Queue'},
                                                      Right => 'CommentOnTicket'
                     )
                     || $unpriv->PrincipalObj->HasRight(
                                                      Object => $args{'Queue'},
                                                      Right => 'CommentOnTicket'
                     )
              ) {
                return ( $args{'CurrentUser'}, 0 );
            }
        }
        elsif ( $args{'Action'} =~ /^correspond$/i ) {

            # check to see whether "Everybody" or "Unprivileged users" can correspond on tickets
            unless ( $everyone->PrincipalObj->HasRight(Object => $args{'Queue'},
                                                       Right  => 'ReplyToTicket'
                     )
                     || $unpriv->PrincipalObj->HasRight(
                                                       Object => $args{'Queue'},
                                                       Right  => 'ReplyToTicket'
                     )
              ) {
                return ( $args{'CurrentUser'}, 0 );
            }

        }
        else {
            return ( $args{'CurrentUser'}, 0 );
        }
    }

    # We're creating a ticket
    elsif ( $args{'Queue'} && $args{'Queue'}->Id ) {

        # check to see whether "Everybody" or "Unprivileged users" can create tickets in this queue
        unless ( $everyone->PrincipalObj->HasRight( Object => $args{'Queue'},
                                                    Right  => 'CreateTicket' )
          ) {
            return ( $args{'CurrentUser'}, 0 );
        }

    }

    $CurrentUser = CreateUser( undef, $Address, $Name, $args{'Message'} );
	if ($CurrentUser) {
    	return ( $CurrentUser, 1 );
	}
	return 0;
}
# {{{ Create User

sub CreateUser {
    my ($Username, $Address, $Name, $ErrorsTo, $entity) = @_;
    my $NewUser = RT::User->new($RT::SystemUser);

	my %UserInfo = {};
	my $UserFoundInExternalDatabase;
 ( $UserFoundInExternalDatabase, %UserInfo ) =
       RT::EmailParser::LookupExternalUserInfo( $Address, $Name );
if ($UserFoundInExternalDatabase) {
	$UserInfo{'Privileged'} = 0;
	$UserInfo{'Password'}   = undef;
	$UserInfo{'Comments'}   = 'Autocreated with LDAP Data on ticket submission';
	
} else {
	return $CurrentUser;
}

    my ($Val, $Message) =
         $NewUser->Create(%UserInfo);

    unless ($Val) {

        # Deal with the race condition of two account creations at once
        #
        if ($Username) {
            $NewUser->LoadByName($Username);
        }

        unless ($NewUser->Id) {
            $NewUser->LoadByEmail($Address);
        }

        unless ($NewUser->Id) {
            MailError( To => $ErrorsTo,
                       Subject => "User could not be created",
                       Explanation => "User creation failed in mailgateway: $Message",
                       MIMEObj => $entity,
                       LogLevel => 'crit'
                     );
        }
    }

    #Load the new user object
    my $CurrentUser = RT::CurrentUser->new();
    $CurrentUser->LoadByEmail($Address);

    unless ($CurrentUser->id) {
            $RT::Logger->warning("Couldn't load user '$Address'.".  "giving up");
                MailError( To => $ErrorsTo,
                           Subject => "User could not be loaded",
                           Explanation => "User  '$Address' could not be loaded in the mail gateway",
                           MIMEObj => $entity,
                           LogLevel => 'crit'
                     );
    }

    return $CurrentUser;
}
# }}}       


1;
