#!/usr/bin/perl

# script that rebuild thesaurus from biblio table.

use strict;

#use warnings; FIXME - Bug 2505

BEGIN {

    # find Koha's Perl modules

    # test carefully before changing this

    use FindBin;

    eval { require "$FindBin::Bin/kohalib.pl" };

}

# Koha modules used

use C4::Context;

use C4::Search;

use C4::Biblio;

use C4::AuthoritiesMarc;

use Koha::Authorities;

use Koha::Authority::MergeRequests;

use Time::HiRes qw(gettimeofday);

use Getopt::Long;

my ($version, $verbose, $mergefrom,$mergeto,$noconfirm,$batch);

GetOptions(

    'h' => \$version,

    'f:s' => \$mergefrom,

    't:s' => \$mergeto,

    'v' => \$verbose,

    'n' => \$noconfirm,

    'b' => \$batch, 

);

if ($version || ($mergefrom eq '' && !$batch)) {

    print <<EOF

Script to merge an authority into another

parameters :

\th : this version/help screen

\tv : verbose mode (show many things on screen)

\tf : the authority number to merge (the one that can be deleted after the merge).

\tt : the authority number where to merge

\tn : don't ask for confirmation (useful for batch mergings, should not be used on command line)

\tb : batch Merging

All biblios with the authority in -t will be modified to be "connected" to authority -f

SAMPLE :

./merge_authority.pl -f 2457 -t 531

Before doing anything, the script will show both authorities and ask for confirmation. Of course, you can merge only 2 authorities of the same kind.

EOF

;#

die;

}#/'

my $dbh = C4::Context->dbh;

$|=1; # flushes output

my $authfrom = GetAuthority($mergefrom);

my $authto = GetAuthority($mergeto);

die "Authority $mergefrom does not exist" unless $authfrom;

die "Authority $mergeto does not exist"   unless $authto;

my $authtypecodefrom = Koha::Authorities->find($mergefrom)->authtypecode;

my $authtypecodeto = Koha::Authorities->find($mergeto)->authtypecode;

unless ($noconfirm || $batch) {

    print "************\n";

    print "You will merge authority : $mergefrom ($authtypecodefrom)\n".$authfrom->as_formatted;

    print "\n*************\n";

    print "Into authority : $mergeto ($authtypecodeto)\n".$authto->as_formatted;

    print "\n\nDo you confirm (enter YES)?";

    my $confirm = <STDIN>;

    chop $confirm;

    unless (uc($confirm) eq 'YES' and $authtypecodefrom eq $authtypecodeto) {

        print "IMPOSSIBLE : authorities are not of the same type ($authtypecodefrom vs $authtypecodeto) !!!\n" if $authtypecodefrom ne $authtypecodeto;

        print "Merge cancelled\n";

        exit;

    }

}

my $starttime = gettimeofday;

print "Merging\n" unless $noconfirm;

if ($batch) {

  my $authref;

  $dbh->do("update need_merge_authorities set done=2 where done=0"); #temporary status 2 means: selected for merge

  $authref=$dbh->selectall_arrayref("select id,authid,authid_new from need_merge_authorities where done=2");

  foreach my $row ( @$authref ) {

      my $req = Koha::Authority::MergeRequests->find( $row->[0] );

      my $marc = $req ? $req->oldmarc : undef;

      my $authid = $row->[1];

      my $authid_new = $row->[2];

      print "managing $authid\n" if $verbose;

      # Following merge call handles both modifications and deletes

      merge({ mergefrom => $authid, MARCfrom => $marc, mergeto => $authid_new, MARCto => GetAuthority($authid_new), override_limit => 1 });

  }

  $dbh->do("update need_merge_authorities set done=1 where done=2"); #DONE

} else {

  my $MARCfrom = GetAuthority($mergefrom);

  my $MARCto = GetAuthority($mergeto);

  &merge({ mergefrom => $mergefrom, MARCfrom => $MARCfrom, mergeto => $mergeto, MARCto => $MARCto });

  #Could add mergefrom authority to mergeto rejected forms before deletion 

  DelAuthority({ authid => $mergefrom }) if ($mergefrom != $mergeto);

}

my $timeneeded = gettimeofday - $starttime;

print "Done in $timeneeded seconds" unless $noconfirm;