#!/usr/bin/perl -w
#
# This script is used to remove all duplicate barcodes.
#
use strict;
use DBI;
use Getopt::Std;
use POSIX qw(
    ceil
    floor
);
my %options = ();
getopts("c:",\%options);
my $configFile = $options{c};
if (!$configFile || ! -f $configFile) {
    print "Usage: $0 -c CONFIG_FILE\n";
    exit 1;
}
#
#sudo  /www/opals/script/dedupBc -c /etc/opals/conf/wswhe_fane
#

my $config = loadConfig($configFile);
my $dbh = makeConnection($config);
END {
    if ($dbh) {
        $dbh->disconnect();
    }
}

$| = 1;
# fix -- update barcodes
my $sth = $dbh->prepare(<<_SQL_);
select distinct rid 
from opl_item
where barcode not regexp '^\_\_' 
order by rid  
_SQL_

    $sth->execute;
    my $dir;
    while (my ($rid) = $sth->fetchrow_array) {
        if($rid){
            updateRecHoldings_xml($dbh,$rid);
        }
    }
    
    $sth->finish;


############################################################
sub updateRecHoldings_xml{
    my($dbh,$rid) =@_;
    my $zRoot   = $config->{'zRoot'};
    my $zPort   = $config->{'zPort'};
    my $zDatabase = $config->{'zDatabase'};
    my $dir     = "$zRoot/$zPort/record/$zDatabase/" . ceil($rid/1000);

    unless (-d $dir) {
            mkdir $dir, 0770;
    }        
     
    if (-f "$dir/$rid.xml") {
        my $bcList={};
        my $hasDupBc=0;
            my $xml = '';
            open  RECORD, "<$dir/$rid.xml";
            my $line;
            while (<RECORD>) {
                #$line = $_;
                $xml .= $_ ;
            }
            close RECORD;

            my $newSubFields="";
            my $found=0;
            while ($xml =~ s/([\s]*<datafield tag="852" ind1="[\d ]" ind2="[\d ]">([\s]*<subfield code="[\w\-]">.*<\/subfield>)+[\s]*<\/datafield>)//) {
                my $tmp852 =$1;
                if ($tmp852 =~ m/<subfield code="p">(.*)<\/subfield>/i) {
                    if($bcList->{$1}){
                        $hasDupBc=1;
                    }
                    else{
                        $newSubFields .= $tmp852;
                        $bcList->{$1}=1;
                    }
                }
            
            }
            if($hasDupBc){
                print "$rid\n";
                $xml =~ s/[\s]*<\/record>/$newSubFields\n<\/record>/;
                open  RECORD, ">$dir/$rid.xml";
                #open  RECORD, ">/tmp/$rid.xml";
                print RECORD $xml;
                close RECORD;
            }
            

    }
}

############################################################
sub fixBc{
    my($bc)=@_;
    $bc =~ s/^\*+|\*+$//g;
    return $bc;
}


############################################################
sub makeConnection {
    my ($config) = @_;
    if (!$config) {
        return;
    }
    my ($db_driver, $db_name, $db_host, $db_port, $db_user, $db_password);

    $db_driver   = $config->{'db_driver'} || 'mysql';
    $db_name     = $config->{'db_name'};
    $db_host     = $config->{'db_host'};
    $db_port     = $config->{'db_port'}   || '3306';
    $db_user     = $config->{'db_user'};
    $db_password = $config->{'db_password'};

    my $dsn = "dbi:$db_driver:$db_name:$db_host:$db_port";

    return DBI->connect($dsn, $db_user, $db_password);
}


############################################################
sub loadConfig {
    my ($configFile) = @_;
#    print "Enter the config filename of Opals: ";
#    $configFile = <STDIN>;
    my $config = {};

    open CONF, $configFile || die "Cannot open file $configFile";
    while (<CONF>) {
        chomp;
        s/#.*//;                # remove comments
        next if /^\s*$/;        # ignore blank lines

        if (/^\s*(\w+)\s*=\s*(.*?)\s*$/) {
            $config->{$1} = $2;
        }
    }
    close CONF;
    
    return $config;
}
############################################################


exit 0;