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package WebPAC::Normalize::Set; |
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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 |
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first lookup join_with |
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/; |
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|
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use warnings; |
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use strict; |
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|
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#use base qw/WebPAC::Common/; |
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use Data::Dumper; |
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|
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=head1 NAME |
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|
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WebPAC::Normalize::Set - describe normalisaton rules using sets |
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|
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=head1 VERSION |
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|
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Version 0.04 |
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|
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=cut |
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|
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our $VERSION = '0.04'; |
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|
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=head1 SYNOPSIS |
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|
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This module uses C<conf/normalize/*.pl> files to perform normalisation |
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from input records using perl functions which are specialized for set |
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processing. |
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|
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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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|
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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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|
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=head1 FUNCTIONS |
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|
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=head2 data_structure |
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|
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Return data structure |
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|
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my $ds = WebPAC::Normalize::Set( |
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lookup => $lookup->lookup_hash, |
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row => $row, |
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rules => $normalize_pl_config, |
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); |
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|
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This function will B<die> if normalizastion can't be evaled. |
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|
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=cut |
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|
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sub data_structure { |
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my $arg = {@_}; |
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|
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die "need row argument" unless ($arg->{row}); |
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die "need normalisation argument" unless ($arg->{rules}); |
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|
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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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|
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=head2 set_rec |
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|
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Set current record hash |
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|
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set_rec( $rec ); |
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|
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=cut |
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|
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my $rec; |
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|
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sub set_rec { |
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$rec = shift or die "no record hash"; |
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} |
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|
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=head2 tag |
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|
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Define new tag for I<search> and I<display>. |
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|
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tag('Title', rec('200','a') ); |
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|
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|
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=cut |
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|
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my $out; |
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|
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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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|
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=head2 display |
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|
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Define tag just for I<display> |
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|
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@v = display('Title', rec('200','a') ); |
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|
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=cut |
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|
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sub display { |
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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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|
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=head2 search |
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|
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Prepare values just for I<search> |
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|
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@v = search('Title', rec('200','a') ); |
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|
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=cut |
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|
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sub search { |
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my $name = shift or die "search needs name as first argument"; |
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my @o = grep { defined($_) && $_ ne '' } @_; |
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return unless (@o); |
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$out->{$name}->{tag} = $name; |
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$out->{$name}->{search} = \@o; |
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} |
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|
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=head2 get_ds |
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|
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Return hash formatted as data structure |
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|
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my $ds = get_ds(); |
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|
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=cut |
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|
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sub get_ds { |
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return $out; |
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} |
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|
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=head2 clean_ds |
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|
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Clean data structure hash for next record |
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|
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clean_ds(); |
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|
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=cut |
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|
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sub clean_ds { |
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$out = undef; |
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} |
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|
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=head2 set_lookup |
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|
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Set current lookup hash |
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|
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set_lookup( $lookup ); |
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|
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=cut |
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|
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my $lookup; |
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|
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sub set_lookup { |
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$lookup = shift; |
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} |
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|
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=head2 rec1 |
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|
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Return all values in some field |
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|
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@v = rec1('200') |
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|
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TODO: order of values is probably same as in source data, need to investigate that |
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|
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=cut |
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|
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sub rec1 { |
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my $f = shift; |
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return unless (defined($rec) && defined($rec->{$f})); |
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if (ref($rec->{$f}) eq 'ARRAY') { |
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return map { |
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if (ref($_) eq 'HASH') { |
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values %{$_}; |
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} else { |
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$_; |
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} |
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} @{ $rec->{$f} }; |
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} elsif( defined($rec->{$f}) ) { |
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return $rec->{$f}; |
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} |
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} |
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|
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=head2 rec2 |
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|
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Return all values in specific field and subfield |
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|
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@v = rec2('200','a') |
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|
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=cut |
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|
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sub rec2 { |
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my $f = shift; |
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return unless (defined($rec && $rec->{$f})); |
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my $sf = shift; |
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return map { $_->{$sf} } grep { ref($_) eq 'HASH' && $_->{$sf} } @{ $rec->{$f} }; |
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} |
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|
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=head2 rec |
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|
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syntaxtic sugar for |
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|
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@v = rec('200') |
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@v = rec('200','a') |
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|
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=cut |
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|
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sub rec { |
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if ($#_ == 0) { |
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return rec1(@_); |
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} elsif ($#_ == 1) { |
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return rec2(@_); |
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} |
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} |
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|
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=head2 regex |
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|
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Apply regex to some or all values |
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|
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@v = regex( 's/foo/bar/g', @v ); |
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|
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=cut |
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|
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sub regex { |
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my $r = shift; |
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my @out; |
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#warn "r: $r\n",Dumper(\@_); |
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foreach my $t (@_) { |
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eval "\$t =~ $r"; |
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push @out, $t; |
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} |
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return @out; |
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} |
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|
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=head2 prefix |
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Prefix all values with a string |
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|
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@v = prefix( 'my_', @v ); |
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|
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=cut |
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|
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sub prefix { |
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my $p = shift or die "prefix needs string as first argument"; |
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return map { $p . $_ } grep { defined($_) } @_; |
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} |
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|
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=head2 first |
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|
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Return first element |
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|
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$v = first( @v ); |
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|
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=cut |
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|
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sub first { |
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my $r = shift; |
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return $r; |
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} |
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|
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=head2 lookup |
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|
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Consult lookup hashes for some value |
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|
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@v = lookup( $v ); |
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@v = lookup( @v ); |
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|
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=cut |
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|
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sub lookup { |
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my $k = shift or return; |
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return unless (defined($lookup->{$k})); |
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if (ref($lookup->{$k}) eq 'ARRAY') { |
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return @{ $lookup->{$k} }; |
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} else { |
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return $lookup->{$k}; |
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} |
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} |
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|
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=head2 join_with |
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|
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Joins walues with some delimiter |
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|
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$v = join_with(", ", @v); |
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|
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=cut |
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|
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sub join_with { |
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my $d = shift; |
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return join($d, grep { defined($_) && $_ ne '' } @_); |
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} |
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|
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# END |
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1; |
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