#!/usr/bin/perl


# Copyright 2000-2002 Katipo Communications
#
# This file is part of Koha.
#
# Koha is free software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# Koha 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.
#
# You should have received a copy of the GNU General Public License along with
# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
# Suite 330, Boston, MA  02111-1307 USA

use strict;
use CGI;
use C4::Auth;
use C4::Koha;
use C4::Context;
use C4::Output;
use C4::Interface::CGI::Output;
use C4::Search;
use C4::Context;
use HTML::Template;

# retrieve parameters
my $input = new CGI;
my $frameworkcode = $input->param('frameworkcode'); # set to select framework
$frameworkcode="" unless $frameworkcode;
my $existingframeworkcode = $input->param('existingframeworkcode'); # set when we have to create a new framework (in frameworkcode) by copying an old one (in existingframeworkcode)
$existingframeworkcode = "" unless $existingframeworkcode;
my $frameworkinfo = getframeworkinfo($frameworkcode);
my $searchfield=$input->param('searchfield');
$searchfield=0 unless $searchfield;
$searchfield=~ s/\,//g;

my $offset=$input->param('offset');
my $op = $input->param('op');
my $pagesize=20;

my $script_name="/cgi-bin/koha/admin/marctagstructure.pl";

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

# open template
my ($template, $loggedinuser, $cookie)
    = get_template_and_user({template_name => "parameters/marctagstructure.tmpl",
			     query => $input,
			     type => "intranet",
			     authnotrequired => 0,
			     flagsrequired => {parameters => 1},
			     debug => 1,
			     });

# get framework list
my $frameworks = getframeworks();
my @frameworkloop;
foreach my $thisframeworkcode (keys %$frameworks) {
	my $selected = 1 if $thisframeworkcode eq $frameworkcode;
	my %row =(value => $thisframeworkcode,
				selected => $selected,
				frameworktext => $frameworks->{$thisframeworkcode}->{'frameworktext'},
			);
	push @frameworkloop, \%row;
}

# check that framework is defined in marc_tag_structure
my $sth=$dbh->prepare("select count(*) from marc_tag_structure where frameworkcode=?");
$sth->execute($frameworkcode);
my ($frameworkexist) = $sth->fetchrow;
if ($frameworkexist) {
} else {
	# if frameworkcode does not exists, then OP must be changed to "create framework" if we are not on the way to create it
	# (op = itemtyp_create_confirm)
	if ($op eq "framework_create_confirm") {
		duplicate_framework($frameworkcode, $existingframeworkcode);
		$op=""; # unset $op to go back to framework list
	} else {
		$op = "framework_create";
	}
}
$template->param(frameworkloop => \@frameworkloop,
				frameworkcode => $frameworkcode,
				frameworktext => $frameworkinfo->{frameworktext});
if ($op) {
$template->param(script_name => $script_name,
						$op              => 1); # we show only the TMPL_VAR names $op
} else {
$template->param(script_name => $script_name,
						else              => 1); # we show only the TMPL_VAR names $op
}


################## ADD_FORM ##################################
# called by default. Used to create form to add or  modify a record
if ($op eq 'add_form') {
	#---- if primkey exists, it's a modify action, so read values to modify...
	my $data;
	if ($searchfield) {
		$sth=$dbh->prepare("select tagfield,liblibrarian,libopac,repeatable,mandatory,authorised_value from marc_tag_structure where tagfield=? and frameworkcode=?");
		$sth->execute($searchfield,$frameworkcode);
		$data=$sth->fetchrow_hashref;
		$sth->finish;
	}
	my $sth = $dbh->prepare("select distinct category from authorised_values");
	$sth->execute;
	my @authorised_values;
	push @authorised_values,"";
	while ((my $category) = $sth->fetchrow_array) {
		push @authorised_values, $category;
	}
	my $authorised_value  = CGI::scrolling_list(-name=>'authorised_value',
			-values=> \@authorised_values,
			-size=>1,
			-id=>"authorised_value",
			-multiple=>0,
			-default => $data->{'authorised_value'},
			);

	if ($searchfield) {
		$template->param(action => "Modify tag",
								searchfield => $searchfield);
		$template->param('heading-modify-tag-p' => 1);
	} else {
		$template->param(action => "Add tag");
		$template->param('heading-add-tag-p' => 1);
	}
	$template->param('use-heading-flags-p' => 1);
	$template->param(liblibrarian => $data->{'liblibrarian'},
							libopac => $data->{'libopac'},
							repeatable => CGI::checkbox(-name=>'repeatable',
						-checked=> $data->{'repeatable'}?'checked':'',
						-value=> 1,
						-label => '',
						-id=> 'repeatable'),
			mandatory => CGI::checkbox(-name => 'mandatory',
						-checked => $data->{'mandatory'}?'checked':'',
						-value => 1,
						-label => '',
						-id => 'mandatory'),
							authorised_value => $authorised_value,
							frameworkcode => $frameworkcode,
							);
													# END $OP eq ADD_FORM
################## ADD_VALIDATE ##################################
# called by add_form, used to insert/modify data in DB
} elsif ($op eq 'add_validate') {
	$sth=$dbh->prepare("replace marc_tag_structure (tagfield,liblibrarian,libopac,repeatable,mandatory,authorised_value,frameworkcode) values (?,?,?,?,?,?,?)");
	my $tagfield       =$input->param('tagfield');
	my $liblibrarian  = $input->param('liblibrarian');
	my $libopac       =$input->param('libopac');
	my $repeatable =$input->param('repeatable');
	my $mandatory =$input->param('mandatory');
	my $authorised_value =$input->param('authorised_value');
	unless (C4::Context->config('demo') eq 1) {
		$sth->execute($tagfield,
							$liblibrarian,
							$libopac,
							$repeatable?1:0,
							$mandatory?1:0,
							$authorised_value,
							$frameworkcode
							);
	}
	$sth->finish;
	print "Content-Type: text/html\n\n<META HTTP-EQUIV=Refresh CONTENT=\"0; URL=marctagstructure.pl?searchfield=$tagfield&frameworkcode=$frameworkcode\"></html>";
	exit;
													# END $OP eq ADD_VALIDATE
################## DELETE_CONFIRM ##################################
# called by default form, used to confirm deletion of data in DB
} elsif ($op eq 'delete_confirm') {
	$sth=$dbh->prepare("select tagfield,liblibrarian,libopac,repeatable,mandatory,authorised_value from marc_tag_structure where tagfield=? and frameworkcode=?");
	$sth->execute($searchfield,$frameworkcode);
	my $data=$sth->fetchrow_hashref;
	$sth->finish;
	$template->param(liblibrarian => $data->{'liblibrarian'},
							searchfield => $searchfield,
							frameworkcode => $frameworkcode,
							);
													# END $OP eq DELETE_CONFIRM
################## DELETE_CONFIRMED ##################################
# called by delete_confirm, used to effectively confirm deletion of data in DB
} elsif ($op eq 'delete_confirmed') {
	unless (C4::Context->config('demo') eq 1) {
		$dbh->do("delete from marc_tag_structure where tagfield='$searchfield' and frameworkcode='$frameworkcode'");
		$dbh->do("delete from marc_subfield_structure where tagfield='$searchfield' and frameworkcode='$frameworkcode'");
	}
													# END $OP eq DELETE_CONFIRMED
################## ITEMTYPE_CREATE ##################################
# called automatically if an unexisting  frameworkis selected
} elsif ($op eq 'framework_create') {
	$sth = $dbh->prepare("select count(*),marc_tag_structure.frameworkcode,frameworktext from marc_tag_structure,biblio_framework where biblio_framework.frameworkcode=marc_tag_structure.frameworkcode group by marc_tag_structure.frameworkcode");
	$sth->execute;
	my @existingframeworkloop;
	while (my ($tot,$thisframeworkcode,$frameworktext) = $sth->fetchrow) {
		if ($tot>0) {
			my %line = ( value => $thisframeworkcode,
						frameworktext => $frameworktext,
					);
			push @existingframeworkloop,\%line;
		}
	}
	$template->param(existingframeworkloop => \@existingframeworkloop,
					frameworkcode => $frameworkcode,
# 					FRtext => $frameworkinfo->{frameworktext},
					);
################## DEFAULT ##################################
} else { # DEFAULT
	# here, $op can be unset or set to "framework_create_confirm".
	if  ($searchfield ne '') {
		 $template->param(searchfield => $searchfield);
	}
	my $env;
	my ($count,$results)=StringSearch($env,$searchfield,$frameworkcode);
	my $toggle="white";
	my @loop_data = ();
	for (my $i=$offset; $i < ($offset+$pagesize<$count?$offset+$pagesize:$count); $i++){
	  	if ($toggle eq 'white'){
			$toggle="#ffffcc";
	  	} else {
			$toggle="white";
	  	}
		my %row_data;  # get a fresh hash for the row data
		$row_data{tagfield} = $results->[$i]{'tagfield'};
		$row_data{liblibrarian} = $results->[$i]{'liblibrarian'};
		$row_data{repeatable} = $results->[$i]{'repeatable'};
		$row_data{mandatory} = $results->[$i]{'mandatory'};
		$row_data{authorised_value} = $results->[$i]{'authorised_value'};
		$row_data{bgcolor} = $toggle;
		push(@loop_data, \%row_data);
	}
	$template->param(loop => \@loop_data);
	if ($offset>0) {
		my $prevpage = $offset-$pagesize;
		$template->param(isprevpage => $offset,
						prevpage=> $prevpage,
						searchfield => $searchfield,
						script_name => $script_name,
						frameworkcode => $frameworkcode,
		 );
	}
	if ($offset+$pagesize<$count) {
		my $nextpage =$offset+$pagesize;
		$template->param(nextpage =>$nextpage,
						searchfield => $searchfield,
						script_name => $script_name,
						frameworkcode => $frameworkcode,
		);
	}
} #---- END $OP eq DEFAULT

$template->param(loggeninuser => $loggedinuser);
output_html_with_http_headers $input, $cookie, $template->output;


#
# the sub used for searches
#
sub StringSearch  {
	my ($env,$searchstring,$frameworkcode)=@_;
	my $dbh = C4::Context->dbh;
	$searchstring=~ s/\'/\\\'/g;
	my @data=split(' ',$searchstring);
	my $count=@data;
	my $sth=$dbh->prepare("Select tagfield,liblibrarian,libopac,repeatable,mandatory,authorised_value from marc_tag_structure where (tagfield >= ? and frameworkcode=?) order by tagfield");
	$sth->execute($data[0], $frameworkcode);
	my @results;
	while (my $data=$sth->fetchrow_hashref){
	push(@results,$data);
	}
	#  $sth->execute;
	$sth->finish;
	return (scalar(@results),\@results);
}

#
# the sub used to duplicate a framework from an existing one in MARC parameters tables.
#
sub duplicate_framework {
	my ($newframeworkcode,$oldframeworkcode) = @_;
	my $sth = $dbh->prepare("select tagfield,liblibrarian,libopac,repeatable,mandatory,authorised_value from marc_tag_structure where frameworkcode=?");
	$sth->execute($oldframeworkcode);
	my $sth_insert = $dbh->prepare("insert into marc_tag_structure (tagfield, liblibrarian, libopac, repeatable, mandatory, authorised_value, frameworkcode) values (?,?,?,?,?,?,?)");
	while ( my ($tagfield,$liblibrarian,$libopac,$repeatable,$mandatory,$authorised_value) = $sth->fetchrow) {
		$sth_insert->execute($tagfield,$liblibrarian,$libopac,$repeatable,$mandatory,$authorised_value,$newframeworkcode);
	}

	$sth = $dbh->prepare("select frameworkcode,tagfield,tagsubfield,liblibrarian,libopac,repeatable,mandatory,kohafield,tab,authorised_value,authtypecode,value_builder,seealso from marc_subfield_structure where frameworkcode=?");
	$sth->execute($oldframeworkcode);
	$sth_insert = $dbh->prepare("insert into marc_subfield_structure (frameworkcode,tagfield,tagsubfield,liblibrarian,libopac,repeatable,mandatory,kohafield,tab,authorised_value,authtypecode,value_builder,seealso) values (?,?,?,?,?,?,?,?,?,?,?,?,?)");
	while ( my ($frameworkcode, $tagfield, $tagsubfield, $liblibrarian, $libopac, $repeatable, $mandatory, $kohafield, $tab, $authorised_value, $thesaurus_category, $value_builder, $seealso) = $sth->fetchrow) {
	    $sth_insert->execute($newframeworkcode, $tagfield, $tagsubfield, $liblibrarian, $libopac, $repeatable, $mandatory, $kohafield, $tab, $authorised_value, $thesaurus_category, $value_builder, $seealso);
	}
}

