#!/home/chmrr/prog/perlbrew/perls/perl-5.20.0/bin/perl
### before: #!@PERL@

use strict;
use warnings;

### after: use lib qw(@RT_LIB_PATH@);
use lib qw(/opt/rt4/local/lib /opt/rt4/lib);
use RT;
RT::LoadConfig();
RT::Init();

my $Attributes = RT::Attributes->new($RT::SystemUser);
$Attributes->Limit( FIELD => 'Name', VALUE => 'EffectiveId' );
$Attributes->Limit( FIELD => 'ObjectType', VALUE => 'RT::User' );

my $primary_user = RT::User->new($RT::SystemUser);

while ( my $Attr = $Attributes->Next ) {
    $primary_user->LoadById($Attr->Content);

    # Was the primary user deleted/shredded?
    unless ( $primary_user and $primary_user->Id ){
        RT::Logger->debug("Primary user missing. Clearing merge relationship for user id "
            . $Attr->Content);
        my $deleted_id = $Attr->Content; # Save for removing from content later
        my ($ret, $msg) = $Attr->Delete;
        RT::Logger->debug("Unable to delete attribute for " . $Attr->Content)
            unless $ret;

        my $secondary_user = RT::User->new($RT::SystemUser);
        ($ret, $msg) = $secondary_user->LoadById($Attr->ObjectId);
        RT::Logger->debug("Unable to load merged user " . $Attr->ObjectId . " $msg")
            unless $ret;

        my $merged_users = $secondary_user->GetMergedUsers;
        if ( not $merged_users->Content ){
            # Content is empty, delete attribute
            $merged_users->Delete;
        }
        else{
            # Clear the deleted user id
            my @content = grep { $_ != $deleted_id } @{$merged_users->Content};
            if ( scalar(@content) ){
                $merged_users->SetContent(\@content);
            }
            else{
                # It's now empty, so delete
                $merged_users->Delete;
            }
        }
    }
}

print "DONE.\n";
exit 0;