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dpavlin |
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package WebPAC::Normalize; |
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use warnings; |
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use strict; |
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dpavlin |
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use Data::Dumper; |
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use Storable; |
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=head1 NAME |
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WebPAC::Normalize - normalisation of source file |
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=head1 VERSION |
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Version 0.01 |
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=cut |
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our $VERSION = '0.01'; |
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=head1 SYNOPSIS |
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This package contains code that could be helpful in implementing different |
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normalisation front-ends. |
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=head1 FUNCTIONS |
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=head2 new |
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Create new normalisation object |
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my $n = new WebPAC::Normalize::Something( |
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cache_data_structure => './cache/ds/', |
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lookup_regex => $lookup->regex, |
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); |
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Optional parameter C<cache_data_structure> defines path to directory |
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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 |
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in structures. |
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=cut |
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sub new { |
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my $class = shift; |
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my $self = {@_}; |
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bless($self, $class); |
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$self->setup_cache_dir( $self->{'cache_data_structure'} ); |
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$self ? return $self : return undef; |
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} |
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=head2 setup_cache_dir |
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Check if specified cache directory exist, and if not, disable caching. |
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$setup_cache_dir('./cache/ds/'); |
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If you pass false or zero value to this function, it will disable |
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cacheing. |
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=cut |
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sub setup_cache_dir { |
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my $self = shift; |
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my $dir = shift; |
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my $log = $self->_get_logger(); |
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if ($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 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); |
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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 |
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sub data_structure { |
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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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$self->{tags_by_order} = \@sorted_tags; |
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} |
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my @ds; |
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$log->debug("tags: ",sub { join(", ",@sorted_tags) }); |
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foreach my $field (@sorted_tags) { |
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my $row; |
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#print "field $field [",$self->{'tag'},"] = ",Dumper($self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}}); |
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foreach my $tag (@{$self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}}}) { |
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my $format = $tag->{'value'} || $tag->{'content'}; |
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$log->debug("format: $format"); |
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my @v; |
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if ($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'}) { |
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@v = $self->sort_arr(@v); |
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} |
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# use format? |
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if ($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 ($field eq 'filename') { |
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$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 |
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if ($tag->{'delimiter'}) { |
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@v = ( join($tag->{'delimiter'}, @v) ); |
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} |
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# default types |
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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->{$type}}, @v; |
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} |
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} |
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} |
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if ($row) { |
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$row->{'tag'} = $field; |
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# TODO: name_sigular, name_plural |
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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, $row; |
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$log->debug("row $field: ",sub { Dumper($row) }); |
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} |
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} |
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if ($cache_file) { |
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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; |
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} |
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=head2 apply_format |
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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); |
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Formats can contain C<lookup{...}> if you need them. |
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=cut |
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sub apply_format { |
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my $self = shift; |
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my ($name,$delimiter,$data) = @_; |
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my $log = $self->_get_logger(); |
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if (! $self->{'import_xml'}->{'format'}->{$name}) { |
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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); |
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my $format = $self->_x($self->{'import_xml'}->{'format'}->{$name}->{'content'}) || $log->logdie("can't find format '$name'"); |
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my @data = split(/\Q$delimiter\E/, $data); |
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my $out = sprintf($format, @data); |
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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'}) { |
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return $self->lookup($out); |
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} else { |
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return $out; |
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} |
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} |
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=head2 parse |
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Perform smart parsing of string, skipping delimiters for fields which aren't |
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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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my $text = $webpac->parse($rec,'eval{"v901^a" eq "Deskriptor"}descriptor: v250^a', $i); |
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=cut |
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sub parse { |
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my $self = shift; |
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my ($rec, $format_utf8, $i) = @_; |
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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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my $out = join('',@out); |
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if ($out) { |
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# add rest of format (suffix) |
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$out .= $format; |
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# add prefix if not there |
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$out = $prefix . $out if ($out !~ m/^\Q$prefix\E/); |
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$log->debug("result: $out"); |
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} |
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if ($eval_code) { |
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my $eval = $self->fill_in($rec,$eval_code,$i) || return; |
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$log->debug("about to eval{$eval} format: $out"); |
| 387 |
|
|
return if (! $self->_eval($eval)); |
| 388 |
|
|
} |
| 389 |
|
|
|
| 390 |
|
|
if ($filter_name && $self->{'filter'}->{$filter_name}) { |
| 391 |
|
|
$log->debug("about to filter{$filter_name} format: $out"); |
| 392 |
|
|
$out = $self->{'filter'}->{$filter_name}->($out); |
| 393 |
|
|
return unless(defined($out)); |
| 394 |
|
|
$log->debug("filter result: $out"); |
| 395 |
|
|
} |
| 396 |
|
|
|
| 397 |
|
|
return $out; |
| 398 |
|
|
} |
| 399 |
|
|
|
| 400 |
|
|
=head2 parse_to_arr |
| 401 |
|
|
|
| 402 |
|
|
Similar to C<parse>, but returns array of all repeatable fields |
| 403 |
|
|
|
| 404 |
|
|
my @arr = $webpac->parse_to_arr($rec,'v250^a'); |
| 405 |
|
|
|
| 406 |
|
|
=cut |
| 407 |
|
|
|
| 408 |
|
|
sub parse_to_arr { |
| 409 |
|
|
my $self = shift; |
| 410 |
|
|
|
| 411 |
|
|
my ($rec, $format_utf8) = @_; |
| 412 |
|
|
|
| 413 |
|
|
my $log = $self->_get_logger(); |
| 414 |
|
|
|
| 415 |
|
|
$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
| 416 |
|
|
return if (! $format_utf8); |
| 417 |
|
|
|
| 418 |
|
|
my $i = 0; |
| 419 |
|
|
my @arr; |
| 420 |
|
|
|
| 421 |
|
|
while (my $v = $self->parse($rec,$format_utf8,$i++)) { |
| 422 |
|
|
push @arr, $v; |
| 423 |
|
|
} |
| 424 |
|
|
|
| 425 |
|
|
$log->debug("format '$format_utf8' returned ",--$i," elements: ", sub { join(" | ",@arr) }) if (@arr); |
| 426 |
|
|
|
| 427 |
|
|
return @arr; |
| 428 |
|
|
} |
| 429 |
|
|
|
| 430 |
|
|
=head2 fill_in_to_arr |
| 431 |
|
|
|
| 432 |
|
|
Similar to C<fill_in>, but returns array of all repeatable fields. Usable |
| 433 |
|
|
for fields which have lookups, so they shouldn't be parsed but rather |
| 434 |
|
|
C<fill_id>ed. |
| 435 |
|
|
|
| 436 |
|
|
my @arr = $webpac->fill_in_to_arr($rec,'[v900];;[v250^a]'); |
| 437 |
|
|
|
| 438 |
|
|
=cut |
| 439 |
|
|
|
| 440 |
|
|
sub fill_in_to_arr { |
| 441 |
|
|
my $self = shift; |
| 442 |
|
|
|
| 443 |
|
|
my ($rec, $format_utf8) = @_; |
| 444 |
|
|
|
| 445 |
|
|
my $log = $self->_get_logger(); |
| 446 |
|
|
|
| 447 |
|
|
$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
| 448 |
|
|
return if (! $format_utf8); |
| 449 |
|
|
|
| 450 |
|
|
my $i = 0; |
| 451 |
|
|
my @arr; |
| 452 |
|
|
|
| 453 |
|
|
while (my @v = $self->fill_in($rec,$format_utf8,$i++)) { |
| 454 |
|
|
push @arr, @v; |
| 455 |
|
|
} |
| 456 |
|
|
|
| 457 |
|
|
$log->debug("format '$format_utf8' returned ",--$i," elements: ", sub { join(" | ",@arr) }) if (@arr); |
| 458 |
|
|
|
| 459 |
|
|
return @arr; |
| 460 |
|
|
} |
| 461 |
|
|
|
| 462 |
|
|
=head2 sort_arr |
| 463 |
|
|
|
| 464 |
|
|
Sort array ignoring case and html in data |
| 465 |
|
|
|
| 466 |
|
|
my @sorted = $webpac->sort_arr(@unsorted); |
| 467 |
|
|
|
| 468 |
|
|
=cut |
| 469 |
|
|
|
| 470 |
|
|
sub sort_arr { |
| 471 |
|
|
my $self = shift; |
| 472 |
|
|
|
| 473 |
|
|
my $log = $self->_get_logger(); |
| 474 |
|
|
|
| 475 |
|
|
# FIXME add Schwartzian Transformation? |
| 476 |
|
|
|
| 477 |
|
|
my @sorted = sort { |
| 478 |
|
|
$a =~ s#<[^>]+/*>##; |
| 479 |
|
|
$b =~ s#<[^>]+/*>##; |
| 480 |
|
|
lc($b) cmp lc($a) |
| 481 |
|
|
} @_; |
| 482 |
|
|
$log->debug("sorted values: ",sub { join(", ",@sorted) }); |
| 483 |
|
|
|
| 484 |
|
|
return @sorted; |
| 485 |
|
|
} |
| 486 |
|
|
|
| 487 |
|
|
|
| 488 |
|
|
=head2 _sort_by_order |
| 489 |
|
|
|
| 490 |
|
|
Sort xml tags data structure accoding to C<order=""> attribute. |
| 491 |
|
|
|
| 492 |
|
|
=cut |
| 493 |
|
|
|
| 494 |
|
|
sub _sort_by_order { |
| 495 |
|
|
my $self = shift; |
| 496 |
|
|
|
| 497 |
|
|
my $va = $self->{'import_xml'}->{'indexer'}->{$a}->{'order'} || |
| 498 |
|
|
$self->{'import_xml'}->{'indexer'}->{$a}; |
| 499 |
|
|
my $vb = $self->{'import_xml'}->{'indexer'}->{$b}->{'order'} || |
| 500 |
|
|
$self->{'import_xml'}->{'indexer'}->{$b}; |
| 501 |
|
|
|
| 502 |
|
|
return $va <=> $vb; |
| 503 |
|
|
} |
| 504 |
|
|
|
| 505 |
|
|
=head2 _x |
| 506 |
|
|
|
| 507 |
|
|
Convert strings from C<conf/normalize> encoding into application specific |
| 508 |
|
|
(optinally specified using C<code_page> to C<new> constructor. |
| 509 |
|
|
|
| 510 |
|
|
my $text = $n->_x('normalize text string'); |
| 511 |
|
|
|
| 512 |
|
|
This is a stub so that other modules doesn't have to implement it. |
| 513 |
|
|
|
| 514 |
|
|
=cut |
| 515 |
|
|
|
| 516 |
|
|
sub _x { |
| 517 |
|
|
my $self = shift; |
| 518 |
|
|
return shift; |
| 519 |
|
|
} |
| 520 |
|
|
|
| 521 |
|
|
|
| 522 |
dpavlin |
10 |
=head1 AUTHOR |
| 523 |
|
|
|
| 524 |
|
|
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
| 525 |
|
|
|
| 526 |
|
|
=head1 COPYRIGHT & LICENSE |
| 527 |
|
|
|
| 528 |
|
|
Copyright 2005 Dobrica Pavlinusic, All Rights Reserved. |
| 529 |
|
|
|
| 530 |
|
|
This program is free software; you can redistribute it and/or modify it |
| 531 |
|
|
under the same terms as Perl itself. |
| 532 |
|
|
|
| 533 |
|
|
=cut |
| 534 |
|
|
|
| 535 |
|
|
1; # End of WebPAC::DB |
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| 
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