#!/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.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

=head1 NAME

detail.pl : script to show an authority in MARC format

=head1 SYNOPSIS

=cut

=head1 DESCRIPTION

This script needs an authid

It shows the authority in a (nice) MARC format depending on authority MARC
parameters tables.

=head1 FUNCTIONS

=cut


use strict;
use warnings;

use C4::AuthoritiesMarc;
use C4::Auth;
use C4::Context;
use C4::Output;
use CGI;
use MARC::Record;
use C4::Koha;

our ($tagslib);

sub build_tabs {
    my ( $template, $record, $dbh, $encoding,$input ) = @_;

    # fill arrays
    my @loop_data = ();
    my $tag;

    # in this array, we will push all the 10 tabs
    # to avoid having 10 tabs in the template : they will all be in the same BIG_LOOP
    my @BIG_LOOP;
    my %seen;
    my @tab_data; # all tags to display
    
    foreach my $used ( keys %$tagslib ){
        push @tab_data,$used if not $seen{$used};
        $seen{$used}++;
    }
        
    my $max_num_tab=9;
    # loop through each tab 0 through 9
    for ( my $tabloop = 0 ; $tabloop <= $max_num_tab ; $tabloop++ ) {
        my @loop_data = (); #innerloop in the template.
        my $i = 0;
        foreach my $tag (sort @tab_data) {
            $i++;
            next if ! $tag;

            # if MARC::Record is not empty =>use it as master loop, then add missing subfields that should be in the tab.
            # if MARC::Record is empty => use tab as master loop.
            if ( $record != -1 && ( $record->field($tag) || $tag eq '000' ) ) {
                my @fields;
                if ( $tag ne '000' ) {
                    @fields = $record->field($tag);
                }
                else {
                  push @fields, MARC::Field->new('000', $record->leader()); # if tag == 000
                }
                # loop through each field
                foreach my $field (@fields) {
                    my @subfields_data;
                    if ($field->tag()<10) {
                        next
                        if (
                            $tagslib->{ $field->tag() }->{ '@' }->{tab}
                            ne $tabloop );
                      next if ($tagslib->{$field->tag()}->{'@'}->{hidden});
                      my %subfield_data;
                      $subfield_data{marc_lib}=$tagslib->{$field->tag()}->{'@'}->{lib};
                      $subfield_data{marc_value}=$field->data();
                      $subfield_data{marc_subfield}='@';
                      $subfield_data{marc_tag}=$field->tag();
                      push(@subfields_data, \%subfield_data);
                    } else {
                      my @subf=$field->subfields;
                  # loop through each subfield
                      for my $i (0..$#subf) {
                        $subf[$i][0] = "@" unless $subf[$i][0];
                        next
                        if (
                            $tagslib->{ $field->tag() }->{ $subf[$i][0] }->{tab}
                            ne $tabloop );
                        next
                        if ( $tagslib->{ $field->tag() }->{ $subf[$i][0] }
                            ->{hidden} );
                        my %subfield_data;
                        $subfield_data{marc_lib}=$tagslib->{$field->tag()}->{$subf[$i][0]}->{lib};
                        if ($tagslib->{$field->tag()}->{$subf[$i][0]}->{isurl}) {
                          $subfield_data{marc_value}="<a href=\"$subf[$i][1]\">$subf[$i][1]</a>";
                        } else {
                          $subfield_data{marc_value}=$subf[$i][1];
                        }
                              $subfield_data{short_desc} = substr(
                                  $tagslib->{ $field->tag() }->{ $subf[$i][0] }->{lib},
                                  0, 20
                              );
                              $subfield_data{long_desc} =
                                $tagslib->{ $field->tag() }->{ $subf[$i][0] }->{lib};
                        $subfield_data{marc_subfield}=$subf[$i][0];
                        $subfield_data{marc_tag}=$field->tag();
                        push(@subfields_data, \%subfield_data);
                      }
                    }
                    if ($#subfields_data>=0) {
                      my %tag_data;
                      $tag_data{tag}=$field->tag(). ' '  
                                     . C4::Koha::display_marc_indicators($field) 
                                     . ' - '
                                     . $tagslib->{$field->tag()}->{lib};
                      $tag_data{subfield} = \@subfields_data;
                      push (@loop_data, \%tag_data);
                    }
                  }
              }
            }
            if ( $#loop_data >= 0 ) {
                push @BIG_LOOP, {
                    number    => $tabloop,
                    innerloop => \@loop_data,
                };
            }
        }
        $template->param( singletab => (scalar(@BIG_LOOP)==1), BIG_LOOP => \@BIG_LOOP );
}


# 
my $query=new CGI;

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

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

my $authid = $query->param('authid');

my $authtypecode = GetAuthTypeCode($authid);
$tagslib = &GetTagsLabels(1,$authtypecode);

# Build list of authtypes for showing them
my $authtypes = getauthtypes;
my @authtypesloop;

foreach my $thisauthtype (sort { $authtypes->{$b} cmp $authtypes->{$a} } keys %$authtypes) {
    my %row =(value => $thisauthtype,
                selected => $thisauthtype eq $authtypecode,
                authtypetext => $authtypes->{$thisauthtype}{'authtypetext'},
            );
    push @authtypesloop, \%row;
}

my $record=GetAuthority($authid);

if (not defined $record) {
    # authid invalid
    $template->param ( errauthid => $authid,
                       unknownauthid => 1,
                       authtypesloop => \@authtypesloop );
    output_html_with_http_headers $query, $cookie, $template->output;
    exit;
}

if (C4::Context->preference("AuthDisplayHierarchy")){
  my $trees=BuildUnimarcHierarchies($authid);
  my @trees = split /;/,$trees ;
  push @trees,$trees unless (@trees);
  my @loophierarchies;
  foreach my $tree (@trees){
    my @tree=split /,/,$tree;
    push @tree,$tree unless (@tree);
    my $cnt=0;
    my @loophierarchy;
    foreach my $element (@tree){
      my $elementdata = GetAuthority($element);
      $record= $elementdata if ($authid==$element);
      push @loophierarchy, BuildUnimarcHierarchy($elementdata,"child".$cnt, $authid);
      $cnt++;
    }
    push @loophierarchies, { 'loopelement' =>\@loophierarchy};
  }
  $template->param(
    'displayhierarchy' =>C4::Context->preference("AuthDisplayHierarchy"),
    'loophierarchies' =>\@loophierarchies,
  );
}

my $count = CountUsage($authid);

# find the marc field/subfield used in biblio by this authority
my $sth = $dbh->prepare("select distinct tagfield from marc_subfield_structure where authtypecode=?");
$sth->execute($authtypecode);
my $biblio_fields;
while (my ($tagfield) = $sth->fetchrow) {
	$biblio_fields.= $tagfield."9,";
}
chop $biblio_fields;

build_tabs ($template, $record, $dbh,"",$query);

$template->param(authid => $authid,
		count => $count,
		biblio_fields => $biblio_fields,
		authtypetext => $authtypes->{$authtypecode}{'authtypetext'},
		authtypesloop => \@authtypesloop,
		);

$template->{VARS}->{marcflavour} = C4::Context->preference("marcflavour");
output_html_with_http_headers $query, $cookie, $template->output;