1 package Koha::SearchEngine::Elasticsearch::QueryBuilder;
3 # This file is part of Koha.
5 # Copyright 2014 Catalyst IT Ltd.
7 # Koha is free software; you can redistribute it and/or modify it
8 # under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
12 # Koha is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
22 Koha::SearchEngine::Elasticsearch::QueryBuilder - constructs elasticsearch
23 query objects from user-supplied queries
27 This provides the functions that take a user-supplied search query, and
28 provides something that can be given to elasticsearch to get answers.
32 use Koha::SearchEngine::Elasticsearch::QueryBuilder;
33 $builder = Koha::SearchEngine::Elasticsearch->new({ index => $index });
34 my $simple_query = $builder->build_query("hello");
35 # This is currently undocumented because the original code is undocumented
36 my $adv_query = $builder->build_advanced_query($indexes, $operands, $operators);
42 use base qw(Koha::SearchEngine::Elasticsearch);
45 use List::MoreUtils qw/ each_array /;
54 my $simple_query = $builder->build_query("hello", %options)
56 This will build a query that can be issued to elasticsearch from the provided
57 string input. This expects a lucene style search form (see
58 L<http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html#query-string-syntax>
61 It'll make an attempt to respect the various query options.
63 Additional options can be provided with the C<%options> hash.
69 This should be an arrayref of hashrefs, each containing a C<field> and an
70 C<direction> (optional, defaults to C<asc>.) The results will be sorted
71 according to these values. Valid values for C<direction> are 'asc' and 'desc'.
78 my ( $self, $query, %options ) = @_;
80 my $stemming = C4::Context->preference("QueryStemming") || 0;
81 my $auto_truncation = C4::Context->preference("QueryAutoTruncate") || 0;
82 my $weight_fields = C4::Context->preference("QueryWeightFields") || 0;
83 my $fuzzy_enabled = C4::Context->preference("QueryFuzzy") || 0;
85 $query = '*' unless defined $query;
91 fuzziness => $fuzzy_enabled ? 'auto' : '0',
92 default_operator => 'AND',
93 default_field => '_all',
94 lenient => JSON::true,
95 analyze_wildcard => JSON::true,
96 fields => $options{fields} || [],
100 if ( $options{sort} ) {
101 foreach my $sort ( @{ $options{sort} } ) {
102 my ( $f, $d ) = @$sort{qw/ field direction /};
103 die "Invalid sort direction, $d"
104 if $d && ( $d ne 'asc' && $d ne 'desc' );
105 $d = 'asc' unless $d;
107 $f = $self->_sort_field($f);
108 push @{ $res->{sort} }, { $f => { order => $d } };
112 # See _convert_facets in Search.pm for how these get turned into
113 # things that Koha can use.
114 my $size = C4::Context->preference('FacetMaxCount');
115 $res->{aggregations} = {
116 author => { terms => { field => "author__facet" , size => $size } },
117 subject => { terms => { field => "subject__facet", size => $size } },
118 itype => { terms => { field => "itype__facet", size => $size} },
119 location => { terms => { field => "location__facet", size => $size } },
120 'su-geo' => { terms => { field => "su-geo__facet", size => $size} },
121 'title-series' => { terms => { field => "title-series__facet", size => $size } },
122 ccode => { terms => { field => "ccode__facet", size => $size } },
123 ln => { terms => { field => "ln__facet", size => $size } },
126 my $display_library_facets = C4::Context->preference('DisplayLibraryFacets');
127 if ( $display_library_facets eq 'both'
128 or $display_library_facets eq 'home' ) {
129 $res->{aggregations}{homebranch} = { terms => { field => "homebranch__facet" } };
131 if ( $display_library_facets eq 'both'
132 or $display_library_facets eq 'holding' ) {
133 $res->{aggregations}{holdingbranch} = { terms => { field => "holdingbranch__facet" } };
138 =head2 build_browse_query
140 my $browse_query = $builder->build_browse_query($field, $query);
142 This performs a "starts with" style query on a particular field. The field
143 to be searched must have been indexed with an appropriate mapping as a
144 "phrase" subfield, which pretty much everything has.
148 # XXX this isn't really a browse query like we want in the end
149 sub build_browse_query {
150 my ( $self, $field, $query ) = @_;
152 my $fuzzy_enabled = C4::Context->preference("QueryFuzzy") || 0;
154 return { query => '*' } if !defined $query;
156 # TODO this should come from Koha::SearchEngine::Elasticsearch
157 my %field_whitelist = (
161 $field = 'title' if !exists $field_whitelist{$field};
162 my $sort = $self->_sort_field($field);
165 match_phrase_prefix => {
169 fuzziness => $fuzzy_enabled ? 'auto' : '0',
173 sort => [ { $sort => { order => "asc" } } ],
177 =head2 build_query_compat
180 $error, $query, $simple_query, $query_cgi,
181 $query_desc, $limit, $limit_cgi, $limit_desc,
182 $stopwords_removed, $query_type
184 = $builder->build_query_compat( \@operators, \@operands, \@indexes,
185 \@limits, \@sort_by, $scan, $lang );
187 This handles a search using the same api as L<C4::Search::buildQuery> does.
189 A very simple query will go in with C<$operands> set to ['query'], and
190 C<$sort_by> set to ['pubdate_dsc']. This simple case will return with
191 C<$query> set to something that can perform the search, C<$simple_query>
192 set to just the search term, C<$query_cgi> set to something that can
193 reproduce this search, and C<$query_desc> set to something else.
197 sub build_query_compat {
198 my ( $self, $operators, $operands, $indexes, $orig_limits, $sort_by, $scan,
202 #die Dumper ( $self, $operators, $operands, $indexes, $orig_limits, $sort_by, $scan, $lang );
203 my @sort_params = $self->_convert_sort_fields(@$sort_by);
204 my @index_params = $self->_convert_index_fields(@$indexes);
205 my $limits = $self->_fix_limit_special_cases($orig_limits);
206 if ( $params->{suppress} ) { push @$limits, "suppress:0"; }
208 # Merge the indexes in with the search terms and the operands so that
209 # each search thing is a handy unit.
210 unshift @$operators, undef; # The first one can't have an op
212 my $truncate = C4::Context->preference("QueryAutoTruncate") || 0;
213 my $ea = each_array( @$operands, @$operators, @index_params );
214 while ( my ( $oand, $otor, $index ) = $ea->() ) {
215 next if ( !defined($oand) || $oand eq '' );
216 $oand = $self->_clean_search_term($oand);
217 $oand = $self->_truncate_terms($oand) if ($truncate);
218 push @search_params, {
219 operand => $oand, # the search terms
220 operator => defined($otor) ? uc $otor : undef, # AND and so on
221 $index ? %$index : (),
225 # We build a string query from limits and the queries. An alternative
226 # would be to pass them separately into build_query and let it build
227 # them into a structured ES query itself. Maybe later, though that'd be
229 my $search_param_query_str = join( ' ', $self->_create_query_string(@search_params) );
230 my $query_str = join( ' AND ',
231 $search_param_query_str || (),
232 $self->_join_queries( $self->_convert_index_strings(@$limits) ) || () );
235 if ( defined($params->{weighted_fields}) && $params->{weighted_fields} ) {
236 push @fields, sprintf("%s^%s", $_->name, $_->weight) for Koha::SearchFields->weighted_fields;
239 # If there's no query on the left, let's remove the junk left behind
240 $query_str =~ s/^ AND //;
242 $options{fields} = \@fields;
243 $options{sort} = \@sort_params;
244 my $query = $self->build_query( $query_str, %options );
246 # We roughly emulate the CGI parameters of the zebra query builder
248 shift @$operators; # Shift out the one we unshifted before
249 $ea = each_array( @$operands, @$operators, @$indexes );
250 while ( my ( $oand, $otor, $index ) = $ea->() ) {
251 $query_cgi .= '&' if $query_cgi;
252 $query_cgi .= 'idx=' . uri_escape_utf8( $index // '') . '&q=' . uri_escape_utf8( $oand );
253 $query_cgi .= '&op=' . uri_escape_utf8( $otor ) if $otor;
255 $query_cgi .= '&scan=1' if ( $scan );
258 $simple_query = $operands->[0] if @$operands == 1;
260 if ( $simple_query ) {
261 $query_desc = $simple_query;
263 $query_desc = $search_param_query_str;
265 my $limit = $self->_join_queries( $self->_convert_index_strings(@$limits));
266 my $limit_cgi = ( $orig_limits and @$orig_limits )
267 ? '&limit=' . join( '&limit=', map { uri_escape_utf8($_) } @$orig_limits )
270 $limit_desc = "$limit" if $limit;
273 undef, $query, $simple_query, $query_cgi, $query_desc,
274 $limit, $limit_cgi, $limit_desc, undef, undef
278 =head2 build_authorities_query
280 my $query = $builder->build_authorities_query(\%search);
282 This takes a nice description of an authority search and turns it into a black-box
283 query that can then be passed to the appropriate searcher.
285 The search description is a hashref that looks something like:
290 where => 'Heading', # search the main entry
291 operator => 'exact', # require an exact match
292 value => 'frogs', # the search string
295 where => '', # search all entries
296 operator => '', # default keyword, right truncation
304 authtypecode => 'TOPIC_TERM',
309 sub build_authorities_query {
310 my ( $self, $search ) = @_;
312 # Start by making the query parts
315 foreach my $s ( @{ $search->{searches} } ) {
316 my ( $wh, $op, $val ) = @{$s}{qw(where operator value)};
317 $wh = '_all' if $wh eq '';
318 if ( $op eq 'is' || $op eq '=' || $op eq 'exact' ) {
320 # look for something that matches a term completely
321 # note, '=' is about numerical vals. May need special handling.
322 # Also, we lowercase our search because the ES
323 # index lowercases its values, and term searches don't get the
324 # search analyzer applied to them.
325 push @query_parts, { match_phrase => {"$wh.phrase" => lc $val} };
327 elsif ( $op eq 'start' ) {
328 # startswith search, uses lowercase untokenized version of heading
329 push @query_parts, { match_phrase_prefix => {"$wh.phrase" => lc $val} };
332 # regular wordlist stuff
333 my @tokens = $self->_split_query( $val );
334 foreach my $token ( @tokens ) {
335 $token = $self->_truncate_terms(
336 $self->_clean_search_term( $token )
339 my $query = $self->_join_queries( @tokens );
340 push @query_parts, { query_string => { default_field => $wh, query => $query } };
344 # Merge the query parts appropriately
345 # 'should' behaves like 'or'
346 # 'must' behaves like 'and'
347 # Zebra results seem to match must so using that here
348 my $query = { query =>
350 { must => \@query_parts }
353 if ( $search->{authtypecode} ) {
354 $query->{query}->{bool}->{filter} = { term => { 'authtype' => lc $search->{authtypecode} } };
358 if ( exists $search->{sort} ) {
359 foreach my $k ( keys %{ $search->{sort} } ) {
360 my $f = $self->_sort_field($k);
361 $s{$f} = $search->{sort}{$k};
363 $search->{sort} = \%s;
367 $query->{sort} = [ $search->{sort} ] if exists $search->{sort};
373 =head2 build_authorities_query_compat
376 $builder->build_authorities_query_compat( \@marclist, \@and_or,
377 \@excluding, \@operator, \@value, $authtypecode, $orderby );
379 This builds a query for searching for authorities, in the style of
380 L<C4::AuthoritiesMarc::SearchAuthorities>.
388 An arrayref containing where the particular term should be searched for.
389 Options are: mainmainentry, mainentry, match, match-heading, see-from, and
390 thesaurus. If left blank, any field is used.
394 Totally ignored. It is never used in L<C4::AuthoritiesMarc::SearchAuthorities>.
402 What form of search to do. Options are: is (phrase, no truncation, whole field
403 must match), = (number exact match), exact (phrase, no truncation, whole field
404 must match). If left blank, then word list, right truncated, anywhere is used.
408 The actual user-provided string value to search for.
412 The authority type code to search within. If blank, then all will be searched.
416 The order to sort the results by. Options are Relevance, HeadingAsc,
417 HeadingDsc, AuthidAsc, AuthidDsc.
421 marclist, operator, and value must be the same length, and the values at
422 index /i/ all relate to each other.
424 This returns a query, which is a black box object that can be passed to the
425 appropriate search object.
429 our $koha_to_index_name = {
430 mainmainentry => 'heading-main',
431 mainentry => 'heading',
433 'match-heading' => 'match-heading',
434 'see-from' => 'match-heading-see-from',
435 thesaurus => 'subject-heading-thesaurus',
440 sub build_authorities_query_compat {
441 my ( $self, $marclist, $and_or, $excluding, $operator, $value,
442 $authtypecode, $orderby )
445 # This turns the old-style many-options argument form into a more
446 # extensible hash form that is understood by L<build_authorities_query>.
449 # Convert to lower case
450 $marclist = [map(lc, @{$marclist})];
451 $orderby = lc $orderby;
453 # Make sure everything exists
454 foreach my $m (@$marclist) {
455 Koha::Exceptions::WrongParameter->throw("Invalid marclist field provided: $m")
456 unless exists $koha_to_index_name->{$m};
458 for ( my $i = 0 ; $i < @$value ; $i++ ) {
459 next unless $value->[$i]; #clean empty form values, ES doesn't like undefined searches
462 where => $koha_to_index_name->{$marclist->[$i]},
463 operator => $operator->[$i],
464 value => $value->[$i],
470 ( $orderby =~ /^heading/ ) ? 'heading'
471 : ( $orderby =~ /^auth/ ) ? 'local-number'
474 my $sort_order = ( $orderby =~ /asc$/ ) ? 'asc' : 'desc';
475 %sort = ( $sort_field => $sort_order, );
478 searches => \@searches,
479 authtypecode => $authtypecode,
481 $search{sort} = \%sort if %sort;
482 my $query = $self->build_authorities_query( \%search );
486 =head2 _convert_sort_fields
488 my @sort_params = _convert_sort_fields(@sort_by)
490 Converts the zebra-style sort index information into elasticsearch-style.
492 C<@sort_by> is the same as presented to L<build_query_compat>, and it returns
493 something that can be sent to L<build_query>.
497 sub _convert_sort_fields {
498 my ( $self, @sort_by ) = @_;
500 # Turn the sorting into something we care about.
501 my %sort_field_convert = (
502 acqdate => 'date-of-acquisition',
504 call_number => 'local-classification',
505 popularity => 'issues',
506 relevance => undef, # default
508 pubdate => 'date-of-publication',
510 my %sort_order_convert =
511 ( qw( desc desc ), qw( dsc desc ), qw( asc asc ), qw( az asc ), qw( za desc ) );
513 # Convert the fields and orders, drop anything we don't know about.
514 grep { $_->{field} } map {
515 my ( $f, $d ) = /(.+)_(.+)/;
517 field => $sort_field_convert{$f},
518 direction => $sort_order_convert{$d}
523 =head2 _convert_index_fields
525 my @index_params = $self->_convert_index_fields(@indexes);
527 Converts zebra-style search index notation into elasticsearch-style.
529 C<@indexes> is an array of index names, as presented to L<build_query_compat>,
530 and it returns something that can be sent to L<build_query>.
532 B<TODO>: this will pull from the elasticsearch mappings table to figure out
537 our %index_field_convert = (
541 'lcn' => 'local-classification',
542 'callnum' => 'local-classification',
543 'record-type' => 'rtype',
544 'mc-rtype' => 'rtype',
546 'lc-card' => 'lc-card-number',
547 'sn' => 'local-number',
548 'yr' => 'date-of-publication',
549 'pubdate' => 'date-of-publication',
550 'acqdate' => 'date-of-acquisition',
551 'date/time-last-modified' => 'date-time-last-modified',
552 'dtlm' => 'date-time-last-modified',
553 'diss' => 'dissertation-information',
556 'music-number' => 'identifier-publisher-for-music',
557 'number-music-publisher' => 'identifier-publisher-for-music',
558 'music' => 'identifier-publisher-for-music',
559 'ident' => 'identifier-standard',
560 'cpn' => 'corporate-name',
561 'cfn' => 'conference-name',
562 'pn' => 'personal-name',
567 'rcn' => 'record-control-number',
569 'su-to' => 'subject',
570 #'su-geo' => 'subject',
571 'su-ut' => 'subject',
573 'se' => 'title-series',
574 'ut' => 'title-uniform',
575 'an' => 'koha-auth-number',
576 'authority-number' => 'koha-auth-number',
579 'rank' => 'relevance',
580 'phr' => 'st-phrase',
581 'wrdl' => 'st-word-list',
582 'rt' => 'right-truncation',
583 'rtrn' => 'right-truncation',
584 'ltrn' => 'left-truncation',
585 'rltrn' => 'left-and-right',
586 'mc-itemtype' => 'itemtype',
587 'mc-ccode' => 'ccode',
588 'branch' => 'homebranch',
589 'mc-loc' => 'location',
590 'stocknumber' => 'number-local-acquisition',
591 'inv' => 'number-local-acquisition',
593 'mc-itype' => 'itype',
594 'aub' => 'author-personal-bibliography',
595 'auo' => 'author-in-order',
599 'frequency-code' => 'ff8-18',
600 'illustration-code' => 'ff8-18-21',
601 'regularity-code' => 'ff8-19',
602 'type-of-serial' => 'ff8-21',
603 'format' => 'ff8-23',
604 'conference-code' => 'ff8-29',
605 'festschrift-indicator' => 'ff8-30',
606 'index-indicator' => 'ff8-31',
609 'literature-code' => 'lf',
610 'biography' => 'bio',
612 'biography-code' => 'bio',
613 'l-format' => 'ff7-01-02',
614 'lex' => 'lexile-number',
615 'hi' => 'host-item-number',
616 'itu' => 'index-term-uncontrolled',
617 'itg' => 'index-term-genre',
619 my $field_name_pattern = '[\w\-]+';
620 my $multi_field_pattern = "(?:\\.$field_name_pattern)*";
622 sub _convert_index_fields {
623 my ( $self, @indexes ) = @_;
625 my %index_type_convert =
626 ( __default => undef, phr => 'phrase', rtrn => 'right-truncate', 'st-year' => 'st-year' );
628 # Convert according to our table, drop anything that doesn't convert.
629 # If a field starts with mc- we save it as it's used (and removed) later
630 # when joining things, to indicate we make it an 'OR' join.
631 # (Sorry, this got a bit ugly after special cases were found.)
632 grep { $_->{field} } map {
633 # Lower case all field names
634 my ( $f, $t ) = map(lc, split /,/);
641 field => exists $index_field_convert{$f} ? $index_field_convert{$f} : $f,
642 type => $index_type_convert{ $t // '__default' }
644 $r->{field} = ($mc . $r->{field}) if $mc && $r->{field};
649 =head2 _convert_index_strings
651 my @searches = $self->_convert_index_strings(@searches);
653 Similar to L<_convert_index_fields>, this takes strings of the form
654 B<field:search term> and rewrites the field from zebra-style to
655 elasticsearch-style. Anything it doesn't understand is returned verbatim.
659 sub _convert_index_strings {
660 my ( $self, @searches ) = @_;
662 foreach my $s (@searches) {
664 my ( $field, $term ) = $s =~ /^\s*([\w,-]*?):(.*)/;
665 unless ( defined($field) && defined($term) ) {
669 my ($conv) = $self->_convert_index_fields($field);
670 unless ( defined($conv) ) {
674 push @res, $conv->{field} . ":"
675 . $self->_modify_string_by_type( %$conv, operand => $term );
680 =head2 _convert_index_strings_freeform
682 my $search = $self->_convert_index_strings_freeform($search);
684 This is similar to L<_convert_index_strings>, however it'll search out the
685 things to change within the string. So it can handle strings such as
686 C<(su:foo) AND (su:bar)>, converting the C<su> appropriately.
688 If there is something of the form "su,complete-subfield" or something, the
689 second part is stripped off as we can't yet handle that. Making it work
690 will have to wait for a real query parser.
694 sub _convert_index_strings_freeform {
695 my ( $self, $search ) = @_;
696 # @TODO: Currenty will alter also fields contained within quotes:
697 # `searching for "stuff cn:123"` for example will become
698 # `searching for "stuff local-number:123"
700 # Fixing this is tricky, one possibility:
701 # https://stackoverflow.com/questions/19193876/perl-regex-to-match-a-string-that-is-not-enclosed-in-quotes
702 # Still not perfect, and will not handle escaped quotes within quotes and assumes balanced quotes.
704 # Another, not so elegant, solution could be to replace all quoted content with placeholders, and put
705 # them back when processing is done.
707 # Lower case field names
708 $search =~ s/($field_name_pattern)(?:,[\w-]*)?($multi_field_pattern):/\L$1\E$2:/og;
709 # Resolve possible field aliases
710 $search =~ s/($field_name_pattern)($multi_field_pattern):/(exists $index_field_convert{$1} ? $index_field_convert{$1} : $1)."$2:"/oge;
714 =head2 _modify_string_by_type
716 my $str = $self->_modify_string_by_type(%index_field);
718 If you have a search term (operand) and a type (phrase, right-truncated), this
719 will convert the string to have the function in lucene search terms, e.g.
720 wrapping quotes around it.
724 sub _modify_string_by_type {
725 my ( $self, %idx ) = @_;
727 my $type = $idx{type} || '';
728 my $str = $idx{operand};
729 return $str unless $str; # Empty or undef, we can't use it.
731 $str .= '*' if $type eq 'right-truncate';
732 $str = '"' . $str . '"' if $type eq 'phrase';
733 if ($type eq 'st-year') {
734 if ($str =~ /^(.*)-(.*)$/) {
735 my $from = $1 || '*';
736 my $until = $2 || '*';
737 $str = "[$from TO $until]";
745 my $query_str = $self->_join_queries(@query_parts);
747 This takes a list of query parts, that might be search terms on their own, or
748 booleaned together, or specifying fields, or whatever, wraps them in
749 parentheses, and ANDs them all together. Suitable for feeding to the ES
752 Note: doesn't AND them together if they specify an index that starts with "mc"
753 as that was a special case in the original code for dealing with multiple
754 choice options (you can't search for something that has an itype of A and
755 and itype of B otherwise.)
760 my ( $self, @parts ) = @_;
762 my @norm_parts = grep { defined($_) && $_ ne '' && $_ !~ /^mc-/ } @parts;
764 map { s/^mc-//r } grep { defined($_) && $_ ne '' && $_ =~ /^mc-/ } @parts;
765 return () unless @norm_parts + @mc_parts;
766 return ( @norm_parts, @mc_parts )[0] if @norm_parts + @mc_parts == 1;
768 @mc_parts ? '(' . ( join ' OR ', map { "($_)" } @mc_parts ) . ')' : ();
770 # Handy trick: $x || () inside a join means that if $x ends up as an
771 # empty string, it gets replaced with (), which makes join ignore it.
772 # (bad effect: this'll also happen to '0', this hopefully doesn't matter
775 join( ' AND ', map { "($_)" } @norm_parts ) || (),
781 my @phrased_queries = $self->_make_phrases(@query_parts);
783 This takes the supplied queries and forces them to be phrases by wrapping
784 quotes around them. It understands field prefixes, e.g. 'subject:' and puts
785 the quotes outside of them if they're there.
790 my ( $self, @parts ) = @_;
791 map { s/^\s*(\w*?:)(.*)$/$1"$2"/r } @parts;
794 =head2 _create_query_string
796 my @query_strings = $self->_create_query_string(@queries);
798 Given a list of hashrefs, it will turn them into a lucene-style query string.
799 The hash should contain field, type (both for the indexes), operator, and
804 sub _create_query_string {
805 my ( $self, @queries ) = @_;
808 my $otor = $_->{operator} ? $_->{operator} . ' ' : '';
809 my $field = $_->{field} ? $_->{field} . ':' : '';
811 my $oand = $self->_modify_string_by_type(%$_);
812 $oand = "($oand)" if $field && scalar(split(/\s+/, $oand)) > 1 && (!defined $_->{type} || $_->{type} ne 'st-year');
813 "$otor($field$oand)";
817 =head2 _clean_search_term
819 my $term = $self->_clean_search_term($term);
821 This cleans a search term by removing any funny characters that may upset
822 ES and give us an error. It also calls L<_convert_index_strings_freeform>
823 to ensure those parts are correct.
827 sub _clean_search_term {
828 my ( $self, $term ) = @_;
830 # Lookahead for checking if we are inside quotes
831 my $lookahead = '(?=(?:[^\"]*+\"[^\"]*+\")*+[^\"]*+$)';
833 # Some hardcoded searches (like with authorities) produce things like
834 # 'an=123', when it ought to be 'an:123' for our purposes.
837 $term = $self->_convert_index_strings_freeform($term);
840 # Remove unbalanced quotes
841 my $unquoted = $term;
842 my $count = ($unquoted =~ tr/"/ /);
843 if ($count % 2 == 1) {
847 # Remove unquoted colons that have whitespace on either side of them
848 $term =~ s/(\:[:\s]+|[:\s]+:)$lookahead//g;
853 =head2 _fix_limit_special_cases
855 my $limits = $self->_fix_limit_special_cases($limits);
857 This converts any special cases that the limit specifications have into things
858 that are more readily processable by the rest of the code.
860 The argument should be an arrayref, and it'll return an arrayref.
864 sub _fix_limit_special_cases {
865 my ( $self, $limits ) = @_;
868 foreach my $l (@$limits) {
870 # This is set up by opac-search.pl
871 if ( $l =~ /^yr,st-numeric,ge=/ ) {
872 my ( $start, $end ) =
873 ( $l =~ /^yr,st-numeric,ge=(.*) and yr,st-numeric,le=(.*)$/ );
874 next unless defined($start) && defined($end);
875 push @new_lim, "copydate:[$start TO $end]";
877 elsif ( $l =~ /^yr,st-numeric=/ ) {
878 my ($date) = ( $l =~ /^yr,st-numeric=(.*)$/ );
879 next unless defined($date);
880 $date = $self->_modify_string_by_type(type => 'st-year', operand => $date);
881 push @new_lim, "copydate:$date";
883 elsif ( $l =~ /^available$/ ) {
884 push @new_lim, 'onloan:0';
895 my $field = $self->_sort_field($field);
897 Given a field name, this works out what the actual name of the field to sort
898 on should be. A '__sort' suffix is added for fields with a sort version, and
899 for text fields either '.phrase' (for sortable versions) or '.raw' is appended
900 to avoid sorting on a tokenized value.
907 my $mappings = $self->get_elasticsearch_mappings();
908 my $textField = defined $mappings->{data}{properties}{$f}{type} && $mappings->{data}{properties}{$f}{type} eq 'text';
909 if (!defined $self->sort_fields()->{$f} || $self->sort_fields()->{$f}) {
911 # We need to add '.phrase' to text fields, otherwise it'll sort
912 # based on the tokenised form.
913 $f .= '.phrase' if $textField;
915 # We need to add '.raw' to text fields without a sort field,
916 # otherwise it'll sort based on the tokenised form.
917 $f .= '.raw' if $textField;
922 =head2 _truncate_terms
924 my $query = $self->_truncate_terms($query);
926 Given a string query this function appends '*' wildcard to all terms except
927 operands and double quoted strings.
931 sub _truncate_terms {
932 my ( $self, $query ) = @_;
934 my @tokens = $self->_split_query( $query );
936 # Filter out empty tokens
937 my @words = grep { $_ !~ /^\s*$/ } @tokens;
939 # Append '*' to words if needed, ie. if it ends in a word character and is not a keyword
942 (/\W$/ or grep {lc($w) eq $_} qw/and or not/) ? $_ : "$_*";
945 return join ' ', @terms;
950 my @token = $self->_split_query($query_str);
952 Given a string query this function splits it to tokens taking into account
953 any field prefixes and quoted strings.
957 my $tokenize_split_re = qr/((?:${field_name_pattern}${multi_field_pattern}:)?"[^"]+"|\s+)/;
960 my ( $self, $query ) = @_;
962 # '"donald duck" title:"the mouse" and peter" get split into
963 # ['', '"donald duck"', '', ' ', '', 'title:"the mouse"', '', ' ', 'and', ' ', 'pete']
964 my @tokens = split $tokenize_split_re, $query;
966 # Filter out empty values
967 @tokens = grep( /\S/, @tokens );