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package WebPAC::Normalize; |
package WebPAC::Normalize; |
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use Exporter 'import'; |
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@EXPORT = qw/ |
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_set_rec _set_lookup |
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_get_ds _clean_ds |
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tag search display |
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rec1 rec2 rec |
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regex prefix suffix surround |
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first lookup join_with |
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/; |
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use warnings; |
use warnings; |
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use strict; |
use strict; |
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#use base qw/WebPAC::Common/; |
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use Data::Dumper; |
use Data::Dumper; |
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use Storable; |
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=head1 NAME |
=head1 NAME |
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WebPAC::Normalize - normalisation of source file |
WebPAC::Normalize - describe normalisaton rules using sets |
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=head1 VERSION |
=head1 VERSION |
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Version 0.01 |
Version 0.05 |
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=cut |
=cut |
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our $VERSION = '0.01'; |
our $VERSION = '0.05'; |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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This package contains code that could be helpful in implementing different |
This module uses C<conf/normalize/*.pl> files to perform normalisation |
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normalisation front-ends. |
from input records using perl functions which are specialized for set |
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processing. |
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Sets are implemented as arrays, and normalisation file is valid perl, which |
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means that you check it's validity before running WebPAC using |
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C<perl -c normalize.pl>. |
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Normalisation can generate multiple output normalized data. For now, supported output |
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types (on the left side of definition) are: C<tag>, C<display> and C<search>. |
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=head1 FUNCTIONS |
=head1 FUNCTIONS |
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=head2 new |
Functions which start with C<_> are private and used by WebPAC internally. |
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All other functions are available for use within normalisation rules. |
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=head2 data_structure |
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Create new normalisation object |
Return data structure |
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my $n = new WebPAC::Normalize::Something( |
my $ds = WebPAC::Normalize::data_structure( |
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cache_data_structure => './cache/ds/', |
lookup => $lookup->lookup_hash, |
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lookup_regex => $lookup->regex, |
row => $row, |
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rules => $normalize_pl_config, |
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); |
); |
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Optional parameter C<cache_data_structure> defines path to directory |
This function will B<die> if normalizastion can't be evaled. |
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in which cache file for C<data_structure> call will be created. |
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Recommended parametar C<lookup_regex> is used to enable parsing of lookups |
Since this function isn't exported you have to call it with |
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in structures. |
C<WebPAC::Normalize::data_structure>. |
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=cut |
=cut |
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sub new { |
sub data_structure { |
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my $class = shift; |
my $arg = {@_}; |
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my $self = {@_}; |
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bless($self, $class); |
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$self->setup_cache_dir( $self->{'cache_data_structure'} ); |
die "need row argument" unless ($arg->{row}); |
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die "need normalisation argument" unless ($arg->{rules}); |
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$self ? return $self : return undef; |
no strict 'subs'; |
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_set_lookup( $arg->{lookup} ); |
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_set_rec( $arg->{row} ); |
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_clean_ds(); |
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eval "$arg->{rules}"; |
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die "error evaling $arg->{rules}: $@\n" if ($@); |
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return _get_ds(); |
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} |
} |
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=head2 setup_cache_dir |
=head2 _set_rec |
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Check if specified cache directory exist, and if not, disable caching. |
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$setup_cache_dir('./cache/ds/'); |
Set current record hash |
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If you pass false or zero value to this function, it will disable |
_set_rec( $rec ); |
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cacheing. |
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=cut |
=cut |
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sub setup_cache_dir { |
my $rec; |
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my $self = shift; |
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my $dir = shift; |
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my $log = $self->_get_logger(); |
sub _set_rec { |
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$rec = shift or die "no record hash"; |
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if ($dir) { |
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my $msg; |
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if (! -e $dir) { |
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$msg = "doesn't exist"; |
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} elsif (! -d $dir) { |
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$msg = "is not directory"; |
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} elsif (! -w $dir) { |
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$msg = "not writable"; |
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} |
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if ($msg) { |
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undef $self->{'cache_data_structure'}; |
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$log->warn("cache_data_structure $dir $msg, disabling..."); |
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} else { |
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$log->debug("using cache dir $dir"); |
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} |
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} else { |
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$log->debug("disabling cache"); |
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undef $self->{'cache_data_structure'}; |
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} |
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} |
} |
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=head2 _get_ds |
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=head2 data_structure |
Return hash formatted as data structure |
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Create in-memory data structure which represents normalized layout from |
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C<conf/normalize/*.xml>. |
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This structures are used to produce output. |
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my @ds = $webpac->data_structure($rec); |
my $ds = _get_ds(); |
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B<Note: historical oddity follows> |
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This method will also set C<< $webpac->{'currnet_filename'} >> if there is |
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C<< <filename> >> tag and C<< $webpac->{'headline'} >> if there is |
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C<< <headline> >> tag. |
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=cut |
=cut |
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sub data_structure { |
my $out; |
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my $self = shift; |
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my $log = $self->_get_logger(); |
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my $rec = shift; |
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$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
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my $cache_file; |
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if (my $cache_path = $self->{'cache_data_structure'}) { |
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my $id = $rec->{'000'}; |
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$id = $rec->{'000'}->[0] if ($id =~ m/^ARRAY/o); |
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unless (defined($id)) { |
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$log->warn("Can't use cache_data_structure on records without unique identifier in field 000"); |
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undef $self->{'cache_data_structure'}; |
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} else { |
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$cache_file = "$cache_path/$id"; |
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if (-r $cache_file) { |
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my $ds_ref = retrieve($cache_file); |
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if ($ds_ref) { |
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$log->debug("cache hit: $cache_file"); |
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my $ok = 1; |
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foreach my $f (qw(current_filename headline)) { |
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if ($ds_ref->{$f}) { |
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$self->{$f} = $ds_ref->{$f}; |
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} else { |
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$ok = 0; |
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} |
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}; |
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if ($ok && $ds_ref->{'ds'}) { |
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return @{ $ds_ref->{'ds'} }; |
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} else { |
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$log->warn("cache_data_structure $cache_path corrupt. Use rm $cache_path/* to re-create it on next run!"); |
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undef $self->{'cache_data_structure'}; |
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} |
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} |
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} |
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} |
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} |
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undef $self->{'currnet_filename'}; |
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undef $self->{'headline'}; |
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my @sorted_tags; |
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if ($self->{tags_by_order}) { |
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@sorted_tags = @{$self->{tags_by_order}}; |
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} else { |
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@sorted_tags = sort { $self->_sort_by_order } keys %{$self->{'import_xml'}->{'indexer'}}; |
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$self->{tags_by_order} = \@sorted_tags; |
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} |
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my @ds; |
sub _get_ds { |
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return $out; |
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} |
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$log->debug("tags: ",sub { join(", ",@sorted_tags) }); |
=head2 _clean_ds |
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foreach my $field (@sorted_tags) { |
Clean data structure hash for next record |
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my $row; |
_clean_ds(); |
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#print "field $field [",$self->{'tag'},"] = ",Dumper($self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}}); |
=cut |
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foreach my $tag (@{$self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}}}) { |
sub _clean_ds { |
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my $format = $tag->{'value'} || $tag->{'content'}; |
$out = undef; |
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} |
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$log->debug("format: $format"); |
=head2 _set_lookup |
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my @v; |
Set current lookup hash |
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if ($self->{'lookup_regex'} && $format =~ $self->{'lookup_regex'}) { |
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@v = $self->fill_in_to_arr($rec,$format); |
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} else { |
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@v = $self->parse_to_arr($rec,$format); |
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} |
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next if (! @v); |
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if ($tag->{'sort'}) { |
_set_lookup( $lookup ); |
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@v = $self->sort_arr(@v); |
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} |
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# use format? |
=cut |
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if ($tag->{'format_name'}) { |
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@v = map { $self->apply_format($tag->{'format_name'},$tag->{'format_delimiter'},$_) } @v; |
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} |
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if ($field eq 'filename') { |
my $lookup; |
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$self->{'current_filename'} = join('',@v); |
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$log->debug("filename: ",$self->{'current_filename'}); |
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} elsif ($field eq 'headline') { |
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$self->{'headline'} .= join('',@v); |
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$log->debug("headline: ",$self->{'headline'}); |
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next; # don't return headline in data_structure! |
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} |
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# delimiter will join repeatable fields |
sub _set_lookup { |
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if ($tag->{'delimiter'}) { |
$lookup = shift; |
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@v = ( join($tag->{'delimiter'}, @v) ); |
} |
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} |
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# default types |
=head2 tag |
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my @types = qw(display swish); |
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# override by type attribute |
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@types = ( $tag->{'type'} ) if ($tag->{'type'}); |
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foreach my $type (@types) { |
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# append to previous line? |
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$log->debug("type: $type ",sub { join(" ",@v) }, $row->{'append'} || 'no append'); |
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if ($tag->{'append'}) { |
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# I will delimit appended part with |
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# delimiter (or ,) |
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my $d = $tag->{'delimiter'}; |
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# default delimiter |
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$d ||= " "; |
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my $last = pop @{$row->{$type}}; |
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$d = "" if (! $last); |
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$last .= $d . join($d, @v); |
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push @{$row->{$type}}, $last; |
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} else { |
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push @{$row->{$type}}, @v; |
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} |
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} |
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Define new tag for I<search> and I<display>. |
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} |
tag('Title', rec('200','a') ); |
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if ($row) { |
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$row->{'tag'} = $field; |
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# TODO: name_sigular, name_plural |
=cut |
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my $name = $self->{'import_xml'}->{'indexer'}->{$field}->{'name'}; |
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$row->{'name'} = $name ? $self->_x($name) : $field; |
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# post-sort all values in field |
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if ($self->{'import_xml'}->{'indexer'}->{$field}->{'sort'}) { |
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$log->warn("sort at field tag not implemented"); |
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} |
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push @ds, $row; |
sub tag { |
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my $name = shift or die "tag needs name as first argument"; |
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my @o = grep { defined($_) && $_ ne '' } @_; |
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return unless (@o); |
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$out->{$name}->{tag} = $name; |
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$out->{$name}->{search} = \@o; |
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$out->{$name}->{display} = \@o; |
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} |
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$log->debug("row $field: ",sub { Dumper($row) }); |
=head2 display |
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} |
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} |
Define tag just for I<display> |
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if ($cache_file) { |
@v = display('Title', rec('200','a') ); |
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store { |
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ds => \@ds, |
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current_filename => $self->{'current_filename'}, |
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headline => $self->{'headline'}, |
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}, $cache_file; |
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$log->debug("created storable cache file $cache_file"); |
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} |
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return @ds; |
=cut |
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sub display { |
| 162 |
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my $name = shift or die "display needs name as first argument"; |
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my @o = grep { defined($_) && $_ ne '' } @_; |
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return unless (@o); |
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$out->{$name}->{tag} = $name; |
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$out->{$name}->{display} = \@o; |
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} |
} |
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=head2 apply_format |
=head2 search |
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Apply format specified in tag with C<format_name="name"> and |
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C<format_delimiter=";;">. |
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my $text = $webpac->apply_format($format_name,$format_delimiter,$data); |
Prepare values just for I<search> |
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Formats can contain C<lookup{...}> if you need them. |
@v = search('Title', rec('200','a') ); |
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=cut |
=cut |
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sub apply_format { |
sub search { |
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my $self = shift; |
my $name = shift or die "search needs name as first argument"; |
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my @o = grep { defined($_) && $_ ne '' } @_; |
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my ($name,$delimiter,$data) = @_; |
return unless (@o); |
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$out->{$name}->{tag} = $name; |
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my $log = $self->_get_logger(); |
$out->{$name}->{search} = \@o; |
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} |
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if (! $self->{'import_xml'}->{'format'}->{$name}) { |
=head2 rec1 |
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$log->warn("<format name=\"$name\"> is not defined in ",$self->{'import_xml_file'}); |
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return $data; |
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} |
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$log->warn("no delimiter for format $name") if (! $delimiter); |
Return all values in some field |
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my $format = $self->_x($self->{'import_xml'}->{'format'}->{$name}->{'content'}) || $log->logdie("can't find format '$name'"); |
@v = rec1('200') |
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my @data = split(/\Q$delimiter\E/, $data); |
TODO: order of values is probably same as in source data, need to investigate that |
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my $out = sprintf($format, @data); |
=cut |
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$log->debug("using format $name [$format] on $data to produce: $out"); |
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if ($self->{'lookup_regex'} && $out =~ $self->{'lookup_regex'}) { |
sub rec1 { |
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return $self->lookup($out); |
my $f = shift; |
| 197 |
} else { |
return unless (defined($rec) && defined($rec->{$f})); |
| 198 |
return $out; |
if (ref($rec->{$f}) eq 'ARRAY') { |
| 199 |
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return map { |
| 200 |
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if (ref($_) eq 'HASH') { |
| 201 |
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values %{$_}; |
| 202 |
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} else { |
| 203 |
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$_; |
| 204 |
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} |
| 205 |
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} @{ $rec->{$f} }; |
| 206 |
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} elsif( defined($rec->{$f}) ) { |
| 207 |
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return $rec->{$f}; |
| 208 |
} |
} |
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| 209 |
} |
} |
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=head2 parse |
=head2 rec2 |
| 212 |
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| 213 |
Perform smart parsing of string, skipping delimiters for fields which aren't |
Return all values in specific field and subfield |
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defined. It can also eval code in format starting with C<eval{...}> and |
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return output or nothing depending on eval code. |
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| 215 |
my $text = $webpac->parse($rec,'eval{"v901^a" eq "Deskriptor"}descriptor: v250^a', $i); |
@v = rec2('200','a') |
| 216 |
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| 217 |
=cut |
=cut |
| 218 |
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| 219 |
sub parse { |
sub rec2 { |
| 220 |
my $self = shift; |
my $f = shift; |
| 221 |
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return unless (defined($rec && $rec->{$f})); |
| 222 |
my ($rec, $format_utf8, $i) = @_; |
my $sf = shift; |
| 223 |
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return map { $_->{$sf} } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} }; |
| 224 |
return if (! $format_utf8); |
} |
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my $log = $self->_get_logger(); |
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$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
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$i = 0 if (! $i); |
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my $format = $self->_x($format_utf8) || $log->logconfess("can't convert '$format_utf8' from UTF-8 to ",$self->{'code_page'}); |
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my @out; |
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$log->debug("format: $format"); |
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my $eval_code; |
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# remove eval{...} from beginning |
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$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s); |
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my $filter_name; |
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# remove filter{...} from beginning |
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$filter_name = $1 if ($format =~ s/^filter{([^}]+)}//s); |
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my $prefix; |
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my $all_found=0; |
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while ($format =~ s/^(.*?)(v|s)(\d+)(?:\^(\w))?//s) { |
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my $del = $1 || ''; |
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$prefix ||= $del if ($all_found == 0); |
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# repeatable index |
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my $r = $i; |
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$r = 0 if (lc("$2") eq 's'); |
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my $found = 0; |
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my $tmp = $self->get_data(\$rec,$3,$4,$r,\$found); |
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if ($found) { |
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push @out, $del; |
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push @out, $tmp; |
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$all_found += $found; |
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} |
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} |
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return if (! $all_found); |
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| 225 |
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| 226 |
my $out = join('',@out); |
=head2 rec |
| 227 |
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| 228 |
if ($out) { |
syntaxtic sugar for |
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# add rest of format (suffix) |
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$out .= $format; |
|
| 229 |
|
|
| 230 |
# add prefix if not there |
@v = rec('200') |
| 231 |
$out = $prefix . $out if ($out !~ m/^\Q$prefix\E/); |
@v = rec('200','a') |
| 232 |
|
|
| 233 |
$log->debug("result: $out"); |
=cut |
|
} |
|
| 234 |
|
|
| 235 |
if ($eval_code) { |
sub rec { |
| 236 |
my $eval = $self->fill_in($rec,$eval_code,$i) || return; |
if ($#_ == 0) { |
| 237 |
$log->debug("about to eval{$eval} format: $out"); |
return rec1(@_); |
| 238 |
return if (! $self->_eval($eval)); |
} elsif ($#_ == 1) { |
| 239 |
|
return rec2(@_); |
| 240 |
} |
} |
|
|
|
|
if ($filter_name && $self->{'filter'}->{$filter_name}) { |
|
|
$log->debug("about to filter{$filter_name} format: $out"); |
|
|
$out = $self->{'filter'}->{$filter_name}->($out); |
|
|
return unless(defined($out)); |
|
|
$log->debug("filter result: $out"); |
|
|
} |
|
|
|
|
|
return $out; |
|
| 241 |
} |
} |
| 242 |
|
|
| 243 |
=head2 parse_to_arr |
=head2 regex |
| 244 |
|
|
| 245 |
Similar to C<parse>, but returns array of all repeatable fields |
Apply regex to some or all values |
| 246 |
|
|
| 247 |
my @arr = $webpac->parse_to_arr($rec,'v250^a'); |
@v = regex( 's/foo/bar/g', @v ); |
| 248 |
|
|
| 249 |
=cut |
=cut |
| 250 |
|
|
| 251 |
sub parse_to_arr { |
sub regex { |
| 252 |
my $self = shift; |
my $r = shift; |
| 253 |
|
my @out; |
| 254 |
my ($rec, $format_utf8) = @_; |
#warn "r: $r\n",Dumper(\@_); |
| 255 |
|
foreach my $t (@_) { |
| 256 |
my $log = $self->_get_logger(); |
next unless ($t); |
| 257 |
|
eval "\$t =~ $r"; |
| 258 |
$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
push @out, $t if ($t && $t ne ''); |
|
return if (! $format_utf8); |
|
|
|
|
|
my $i = 0; |
|
|
my @arr; |
|
|
|
|
|
while (my $v = $self->parse($rec,$format_utf8,$i++)) { |
|
|
push @arr, $v; |
|
| 259 |
} |
} |
| 260 |
|
return @out; |
|
$log->debug("format '$format_utf8' returned ",--$i," elements: ", sub { join(" | ",@arr) }) if (@arr); |
|
|
|
|
|
return @arr; |
|
| 261 |
} |
} |
| 262 |
|
|
| 263 |
=head2 fill_in_to_arr |
=head2 prefix |
| 264 |
|
|
| 265 |
Similar to C<fill_in>, but returns array of all repeatable fields. Usable |
Prefix all values with a string |
|
for fields which have lookups, so they shouldn't be parsed but rather |
|
|
C<fill_id>ed. |
|
| 266 |
|
|
| 267 |
my @arr = $webpac->fill_in_to_arr($rec,'[v900];;[v250^a]'); |
@v = prefix( 'my_', @v ); |
| 268 |
|
|
| 269 |
=cut |
=cut |
| 270 |
|
|
| 271 |
sub fill_in_to_arr { |
sub prefix { |
| 272 |
my $self = shift; |
my $p = shift or die "prefix needs string as first argument"; |
| 273 |
|
return map { $p . $_ } grep { defined($_) } @_; |
| 274 |
my ($rec, $format_utf8) = @_; |
} |
| 275 |
|
|
| 276 |
my $log = $self->_get_logger(); |
=head2 suffix |
| 277 |
|
|
| 278 |
$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
suffix all values with a string |
|
return if (! $format_utf8); |
|
| 279 |
|
|
| 280 |
my $i = 0; |
@v = suffix( '_my', @v ); |
|
my @arr; |
|
| 281 |
|
|
| 282 |
while (my @v = $self->fill_in($rec,$format_utf8,$i++)) { |
=cut |
|
push @arr, @v; |
|
|
} |
|
|
|
|
|
$log->debug("format '$format_utf8' returned ",--$i," elements: ", sub { join(" | ",@arr) }) if (@arr); |
|
| 283 |
|
|
| 284 |
return @arr; |
sub suffix { |
| 285 |
|
my $s = shift or die "suffix needs string as first argument"; |
| 286 |
|
return map { $_ . $s } grep { defined($_) } @_; |
| 287 |
} |
} |
| 288 |
|
|
| 289 |
=head2 sort_arr |
=head2 surround |
| 290 |
|
|
| 291 |
Sort array ignoring case and html in data |
surround all values with a two strings |
| 292 |
|
|
| 293 |
my @sorted = $webpac->sort_arr(@unsorted); |
@v = surround( 'prefix_', '_suffix', @v ); |
| 294 |
|
|
| 295 |
=cut |
=cut |
| 296 |
|
|
| 297 |
sub sort_arr { |
sub surround { |
| 298 |
my $self = shift; |
my $p = shift or die "surround need prefix as first argument"; |
| 299 |
|
my $s = shift or die "surround needs suffix as second argument"; |
| 300 |
my $log = $self->_get_logger(); |
return map { $p . $_ . $s } grep { defined($_) } @_; |
|
|
|
|
# FIXME add Schwartzian Transformation? |
|
|
|
|
|
my @sorted = sort { |
|
|
$a =~ s#<[^>]+/*>##; |
|
|
$b =~ s#<[^>]+/*>##; |
|
|
lc($b) cmp lc($a) |
|
|
} @_; |
|
|
$log->debug("sorted values: ",sub { join(", ",@sorted) }); |
|
|
|
|
|
return @sorted; |
|
| 301 |
} |
} |
| 302 |
|
|
| 303 |
|
=head2 first |
| 304 |
|
|
| 305 |
=head2 _sort_by_order |
Return first element |
| 306 |
|
|
| 307 |
Sort xml tags data structure accoding to C<order=""> attribute. |
$v = first( @v ); |
| 308 |
|
|
| 309 |
=cut |
=cut |
| 310 |
|
|
| 311 |
sub _sort_by_order { |
sub first { |
| 312 |
my $self = shift; |
my $r = shift; |
| 313 |
|
return $r; |
|
my $va = $self->{'import_xml'}->{'indexer'}->{$a}->{'order'} || |
|
|
$self->{'import_xml'}->{'indexer'}->{$a}; |
|
|
my $vb = $self->{'import_xml'}->{'indexer'}->{$b}->{'order'} || |
|
|
$self->{'import_xml'}->{'indexer'}->{$b}; |
|
|
|
|
|
return $va <=> $vb; |
|
| 314 |
} |
} |
| 315 |
|
|
| 316 |
=head2 _x |
=head2 lookup |
|
|
|
|
Convert strings from C<conf/normalize> encoding into application specific |
|
|
(optinally specified using C<code_page> to C<new> constructor. |
|
| 317 |
|
|
| 318 |
my $text = $n->_x('normalize text string'); |
Consult lookup hashes for some value |
| 319 |
|
|
| 320 |
This is a stub so that other modules doesn't have to implement it. |
@v = lookup( $v ); |
| 321 |
|
@v = lookup( @v ); |
| 322 |
|
|
| 323 |
=cut |
=cut |
| 324 |
|
|
| 325 |
sub _x { |
sub lookup { |
| 326 |
my $self = shift; |
my $k = shift or return; |
| 327 |
return shift; |
return unless (defined($lookup->{$k})); |
| 328 |
|
if (ref($lookup->{$k}) eq 'ARRAY') { |
| 329 |
|
return @{ $lookup->{$k} }; |
| 330 |
|
} else { |
| 331 |
|
return $lookup->{$k}; |
| 332 |
|
} |
| 333 |
} |
} |
| 334 |
|
|
| 335 |
|
=head2 join_with |
| 336 |
|
|
| 337 |
=head1 AUTHOR |
Joins walues with some delimiter |
|
|
|
|
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
|
|
|
|
|
=head1 COPYRIGHT & LICENSE |
|
| 338 |
|
|
| 339 |
Copyright 2005 Dobrica Pavlinusic, All Rights Reserved. |
$v = join_with(", ", @v); |
|
|
|
|
This program is free software; you can redistribute it and/or modify it |
|
|
under the same terms as Perl itself. |
|
| 340 |
|
|
| 341 |
=cut |
=cut |
| 342 |
|
|
| 343 |
1; # End of WebPAC::DB |
sub join_with { |
| 344 |
|
my $d = shift; |
| 345 |
|
return join($d, grep { defined($_) && $_ ne '' } @_); |
| 346 |
|
} |
| 347 |
|
|
| 348 |
|
# END |
| 349 |
|
1; |
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