%# BEGIN BPS TAGGED BLOCK {{{
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% $r->content_type('application/json; charset=utf-8');
<% JSON( \@suggestions ) |n %>
% $m->abort;
<%ARGS>
$return => 'Name'
$limit => undef
$term => undef
$max => undef
</%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 %user_uniq_hash;
my $isSU = $session{CurrentUser}
    ->HasRight( Right => 'SuperUser', Object => $RT::System );

$m->callback( CallbackName => 'ModifyMaxResults', max => \$max );
$max //= 10;

# 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} );
    # Limit by our autocomplete term BEFORE we limit to OwnTicket because that
    # does a funky union hack
    $Users->SimpleSearch(
        Max    => $max,
        Term   => $term,
        Return => $return,
    );

    $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,
            $User->Format,
        ];
    }
}

# 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,
        RT->Nobody->Format,
    ];
}

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>