package Koha::SearchEngine::Search;
-use Moose;
+
+# This file is part of Koha.
+#
+# Copyright 2015 Catalyst IT
+#
+# 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 3 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, see <http://www.gnu.org/licenses>.
+
+# This is a shim that gives you the appropriate search object for your
+# system preference.
+
+=head1 NAME
+
+Koha::SearchEngine::Search - instantiate the search object that corresponds to
+the C<SearchEngine> system preference.
+
+=head1 DESCRIPTION
+
+This allows you to be agnostic about what the search engine configuration is
+and just get whatever search object you need.
+
+=head1 SYNOPSIS
+
+ use Koha::SearchEngine::Search;
+ my $searcher = Koha::SearchEngine::Search->new();
+
+=head1 METHODS
+
+=head2 new
+
+Creates a new C<Search> of whatever the relevant type is.
+
+=cut
+
+use Modern::Perl;
use C4::Context;
+use C4::Biblio;
+use POSIX qw( ceil );
+
+sub new {
+ my $engine = C4::Context->preference("SearchEngine") // 'Zebra';
+ my $file = "Koha/SearchEngine/${engine}/Search.pm";
+ my $class = "Koha::SearchEngine::${engine}::Search";
+ require $file;
+ shift @_;
+ return $class->new(@_);
+}
+
+=head2 extract_biblionumber
+
+ my $biblionumber = $searcher->extract_biblionumber( $marc );
+
+Returns the biblionumber from $marc. The routine is called from the
+extract_biblionumber method of the specific search engine.
+
+=cut
+
+sub extract_biblionumber {
+ my ( $record ) = @_;
+ return if ref($record) ne 'MARC::Record';
+ my ( $biblionumbertagfield, $biblionumbertagsubfield ) = C4::Biblio::GetMarcFromKohaField( 'biblio.biblionumber' );
+ if( $biblionumbertagfield < 10 ) {
+ my $controlfield = $record->field( $biblionumbertagfield );
+ return $controlfield ? $controlfield->data : undef;
+ }
+ return $record->subfield( $biblionumbertagfield, $biblionumbertagsubfield );
+}
+
+=head2 pagination_bar
+
+my ( $PAGE_NUMBERS, $hits_to_paginate, $pages, $current_page_number,
+ $previous_page_offset, $next_page_offset, $last_page_offset ) = Koha::SearchEngine::Search->pagination_bar(
+ {
+ hits => $hits,
+ max_result_window => $max_result_window,
+ results_per_page => $results_per_page,
+ offset => $offset,
+ sort_by => \@sort_by
+ }
+ );
+
+Returns the variables needed for the page-nubers.inc to build search results
+
+=cut
+
+sub pagination_bar {
+ my ( $self, $params ) = @_;
+ my $hits = $params->{hits};
+ my $results_per_page = $params->{results_per_page};
+ my $offset = $params->{offset};
+ my $sort_by = $params->{sort_by};
+ my @page_numbers;
+ my $max_result_window = $params->{max_result_window};
+ my $hits_to_paginate =
+ ( $max_result_window && $max_result_window < $hits )
+ ? $max_result_window
+ : $hits;
+
+ # total number of pages there will be
+ my $pages = ceil( $hits_to_paginate / $results_per_page );
+ my $last_page_offset = ( $pages - 1 ) * $results_per_page;
+
+ # default page number
+ my $current_page_number = 1;
+ $current_page_number = ( $offset / $results_per_page + 1 ) if $offset;
+ my $previous_page_offset;
+ if ( $offset >= $results_per_page ) {
+ $previous_page_offset = $offset - $results_per_page;
+ }
+ my $next_page_offset = $offset + $results_per_page;
+
+ # If we're within the first 10 pages, keep it simple
+ if ( $current_page_number < 10 ) {
+
+ # just show the first 10 pages
+ # Loop through the pages
+ my $pages_to_show = 10;
+ $pages_to_show = $pages if $pages < 10;
+ for ( my $i = 1 ; $i <= $pages_to_show ; $i++ ) {
+
+ # the offset for this page
+ my $this_offset =
+ ( ( $i * $results_per_page ) - $results_per_page );
+
+ # the page number for this page
+ my $this_page_number = $i;
+
+ # put it in the array
+ push @page_numbers, {
+ offset => $this_offset,
+ pg => $this_page_number,
+
+ # it should only be highlighted if it's the current page
+ highlight => $this_page_number == $current_page_number,
+ sort_by => join ' ',
+ @$sort_by
+ };
+ }
+ }
+
+ # now, show up to twenty pages, with the current one smack in the middle
+ # near the end of search results we will show 10 below and as many remaining above
+ else {
+ for (
+ my $i = $current_page_number ;
+ $i <= ( $current_page_number + 19 ) ;
+ $i++
+ )
+ {
+ my $this_offset =
+ ( ( ( $i - 9 ) * $results_per_page ) - $results_per_page );
+ my $this_page_number = $i - 9;
+ if ( $this_page_number <= $pages ) {
+ push @page_numbers,
+ {
+ offset => $this_offset,
+ pg => $this_page_number,
+ highlight => $this_page_number == $current_page_number,
+ sort_by => join ' ',
+ @$sort_by
+ };
+ }
+ }
+ }
+
+ return ( \@page_numbers, $hits_to_paginate, $pages, $current_page_number,
+ $previous_page_offset, $next_page_offset, $last_page_offset );
-use Moose::Util qw( apply_all_roles );
+}
-sub BUILD {
- my $self = shift;
- my $syspref = C4::Context->preference("SearchEngine");
- apply_all_roles( $self, "Koha::SearchEngine::${syspref}::Search" );
-};
1;
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