%# BEGIN BPS TAGGED BLOCK {{{
%#
%# COPYRIGHT:
%#
%# This software is Copyright (c) 1996-2014 Best Practical Solutions, LLC
%#                                          <sales@bestpractical.com>
%#
%# (Except where explicitly superseded by other copyright notices)
%#
%#
%# LICENSE:
%#
%# 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.
%#
%# You should have received a copy of the GNU General Public License
%# along with this program; if not, write to the Free Software
%# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
%# 02110-1301 or visit their web page on the internet at
%# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html.
%#
%#
%# CONTRIBUTION SUBMISSION POLICY:
%#
%# (The following paragraph is not intended to limit the rights granted
%# to you to modify and distribute this software under the terms of
%# the GNU General Public License and is only of importance to you if
%# you choose to contribute your changes and enhancements to the
%# community by submitting them to Best Practical Solutions, LLC.)
%#
%# By intentionally submitting any modifications, corrections or
%# derivatives to this work, or any other work intended for use with
%# Request Tracker, to Best Practical Solutions, LLC, you confirm that
%# you are the copyright holder for those contributions and you grant
%# Best Practical Solutions,  LLC a nonexclusive, worldwide, irrevocable,
%# royalty-free, perpetual, license to use, copy, create derivative
%# works based on those contributions, and sublicense and distribute
%# those contributions and any derivatives thereof.
%#
%# END BPS TAGGED BLOCK }}}
% $r->content_type('application/json');
<% JSON( \@suggestions ) |n %>
% $m->abort;
<%ARGS>
$return => 'Name'
$limit => undef
$term => undef
$max => 10
</%ARGS>
<%INIT>
# Only allow certain return fields
$return = 'Name'
    unless $return =~ /^(?:EmailAddress|Name|RealName|id)$/;

$m->abort unless defined $return
             and defined $term
             and defined $limit;

my $CurrentUser = $session{'CurrentUser'};

my %fields = %{ RT->Config->Get('UserAutocompleteFields')
                || { EmailAddress => 1, Name => 1, RealName => 'LIKE' } };

my %user_uniq_hash;
my $isSU = $session{CurrentUser}
    ->HasRight( Right => 'SuperUser', Object => $RT::System );

# Turn RT::Ticket-1|RT::Queue-2 into ['RT::Ticket', 1], ['RT::Queue', 2]
foreach my $spec (map { [split /\-/, $_, 2] } split /\|/, $limit) {
    next unless $spec->[0] =~ /^RT::(Ticket|Queue)$/;

    my $object = $spec->[0]->new( $session{'CurrentUser'} );

    if ( $spec->[1] ) {
        $object->Load( $spec->[1] );

        # Warn if we couldn't load an object
        unless ( $object->id ) {
            $RT::Logger->warn("Owner autocomplete couldn't load an '$spec->[0]' with id '$spec->[1]'");
            next;
        }
    }

    my $Users = RT::Users->new( $session{CurrentUser} );
    $Users->RowsPerPage( $max );

    # Limit by our autocomplete term BEFORE we limit to OwnTicket because that
    # does a funky union hack
    while (my ($name, $op) = each %fields) {
        $op = 'STARTSWITH'
            unless $op =~ /^(?:LIKE|(?:START|END)SWITH)$/i;

        $Users->Limit(
            FIELD           => $name,
            OPERATOR        => $op,
            VALUE           => $term,
            ENTRYAGGREGATOR => 'OR',
            SUBCLAUSE       => 'autocomplete',
        );
    }

    $Users->WhoHaveRight(
        Right               => 'OwnTicket',
        Object              => $object,
        IncludeSystemRights => 1,
        IncludeSuperusers   => $isSU
    );

    while ( my $User = $Users->Next() ) {
        next if $user_uniq_hash{ $User->Id };
        $user_uniq_hash{ $User->Id() } = [
            $User,
            $m->scomp('/Elements/ShowUser', User => $User, NoEscape => 1)
        ];
    }
}

# Make sure we add Nobody if we don't already have it
my $nobody = qr/^n(?:o(?:b(?:o(?:d(?:y)?)?)?)?)?$/i;
if ( not $user_uniq_hash{RT->Nobody->id} and $term =~ $nobody ) {
    $user_uniq_hash{RT->Nobody->id} = [
        RT->Nobody,
        $m->scomp('/Elements/ShowUser', User => RT->Nobody, NoEscape => 1)
    ];
}

my @users = sort { lc $a->[1] cmp lc $b->[1] }
                 values %user_uniq_hash;

my @suggestions;
my $count = 1;

for my $tuple ( @users ) {
    last if $count > $max;
    my $formatted = $tuple->[1];
    $formatted =~ s/\n//g;
    push @suggestions, {
        label => $formatted,
        value => $tuple->[0]->$return
    };
    $count++;
}
</%INIT>
