%# BEGIN BPS TAGGED BLOCK {{{
%#
%# COPYRIGHT:
%#
%# This software is Copyright (c) 1996-2012 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%# (Except where explicitly superseded by other copyright notices)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.
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%# 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.
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%# 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.
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%# CONTRIBUTION SUBMISSION POLICY:
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%# (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
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%# END BPS TAGGED BLOCK }}}
% $r->content_type('application/json');
<% JSON( \@suggestions ) |n %>
% $m->abort;
<%ARGS>
$return => ''
$term => undef
$delim => undef
$max => 10
$privileged => undef
$exclude => ''
$op => undef
</%ARGS>
<%INIT>
# Only allow certain return fields
$return = 'EmailAddress'
    unless $return =~ /^(?:EmailAddress|Name|RealName)$/;

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

# Use our delimeter if we have one
if ( defined $delim and length $delim ) {
    if ( $delim eq ',' ) {
        $delim = qr/,\s*/;
    } else {
        $delim = qr/\Q$delim\E/;
    }

    # If the field handles multiple values, pop the last one off
    $term = (split $delim, $term)[-1] if $term =~ $delim;
}

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

# Require privileged users or overriding config
$m->abort unless $CurrentUser->Privileged
              or RT->Config->Get('AllowUserAutocompleteForUnprivileged');

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

# If an operator is provided, check against only the returned field
# using that operator
%fields = ( $return => $op ) if $op;

my $users = RT::Users->new( $CurrentUser );
$users->RowsPerPage( $max );

$users->LimitToPrivileged() if $privileged;

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',
    );
}

# Exclude users we don't want
foreach (split /\s*,\s*/, $exclude) {
    $users->Limit(FIELD => 'id', VALUE => $_, OPERATOR => '!=');
}

my @suggestions;

while ( my $user = $users->Next ) {
    next if $user->id == RT->SystemUser->id
         or $user->id == RT->Nobody->id;

    my $formatted = $m->scomp('/Elements/ShowUser', User => $user, NoEscape => 1);
    $formatted =~ s/\n//g;
    my $suggestion = { label => $formatted, value => $user->$return };
    $m->callback( CallbackName => "ModifySuggestion", suggestion => $suggestion, user => $user );
    push @suggestions, $suggestion;
}

</%INIT>
