#!/usr/bin/perl -w

use strict;
use DBI;
use Getopt::Std;
use POSIX qw(
    ceil
);


my %options = ();
getopts("c:",\%options);
my $configFile = $options{c};
if (!$configFile || ! -f $configFile) {
    print "Usage: $0 -c CONFIG_FILE\n";
    exit 1;
}

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

$| = 1;
# Codes start...

my $zdbDir = $config->{'zRoot'} .'/'
           . $config->{'zPort'} .'/'
           . 'record' .'/'
           . $config->{'zDatabase'};

my $indexDir;
my $attTbl;
my $query_insert ;
#$dbh->do("alter table opl_marcRecord add leader varchar(24) default null, add cf_008 varchar(40) default null");
    my $sth = $dbh->prepare(<<_SQL_);
select  distinct m.rid
from    opl_marcRecord m inner join opl_item i on i.rid=m.rid
where (cf_008 ="" OR cf_008  is NULL) && i.barcode not regexp '^\_\_\_'
order by rid asc 
_SQL_
    $sth->execute;
    my $dir;

    while (my ($rid) = $sth->fetchrow_array) {
       my $xml=getXmlRecord($zdbDir, $rid);
       if($xml){
           addCF008xmlRec($zdbDir, $rid);  # add control field 008 to xml record
        }
       
    }
    $sth->finish;



# Codes end.

exit 0;

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;
}
############################################################


sub getXmlRecord {
    my ($zdbDir, $rid) = @_;

    my $record = '';
    my $dir = ceil($rid/1000);
    if (! -f "$zdbDir/$dir/$rid.xml") {
        print "ERROR: $zdbDir/$dir/$rid.xml: not found.\n";
        return;
    }

    #print "$rid\n";
    #return;

    open MARCXML, "<$zdbDir/$dir/$rid.xml";
    while (<MARCXML>) {
        $record .= $_;
    }
    close MARCXML;
    return $record;
}

############################################################


sub addCF008xmlRec {
    my ($zdbDir, $rid) = @_;

    my $xml = '';
    my $line;
    my $replacement_allowed = 0;
    my $dir = ceil($rid/1000);
    my $cf008="940203s1995    nyua   j      000 1 eng";
    my $added=0;
    open MARCXML, "<$zdbDir/$dir/$rid.xml";
    while (<MARCXML>) {
        $line = $_;
        if ($line =~ m/<controlfield tag=\"008\">(.*)<\/controlfield>/) {
            my $tmp=$1;
             $tmp =~ s/^\s+|$\s+//g;
             if($tmp eq ''){
                 $line = "  <controlfield tag=\"008\">$cf008</controlfield>\n";
                 $added=1;
            }
            else{
                $cf008=$1;
            }
        }
        if($added==0 &&  $line =~ m/<datafield /){
            $line = "  <controlfield tag=\"008\">$cf008</controlfield>\n" .$line;
            $added=1;
        }
        $xml .= $line;

    }
    updateCF008($dbh, $rid, $cf008);
    close MARCXML;

    open RECORD, ">$zdbDir/$dir/$rid.xml";
    print RECORD $xml;
    close RECORD;
    #  print "$xml\n" ;

}
############################################################


sub updateCF008 {
   my ($dbh, $rid, $cf008) = @_;
   my $sth = $dbh->prepare(<<_SQL_);
update opl_marcRecord
set  cf_008=?
where rid =?
_SQL_
   
    $sth->execute($cf008,$rid);
 
}

#////////////////////////////////////////////////////////////////////////////