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package WebPAC::Input::ISI; |
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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 WebPAC::Input; |
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use base qw/WebPAC::Common/; |
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|
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use Data::Dump qw/dump/; |
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use Carp qw/confess/; |
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|
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=head1 NAME |
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|
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WebPAC::Input::ISI - support for ISI Export Format |
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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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our $debug = 0; |
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|
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|
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=head1 SYNOPSIS |
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|
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Open file in ISI export fromat |
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|
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my $input = new WebPAC::Input::ISI( |
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path => '/path/to/ISI/records.txt', |
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); |
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|
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=head1 FUNCTIONS |
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|
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=head2 new |
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|
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Returns new low-level input API object |
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|
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my $input = new WebPAC::Input::ISI( |
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path => '/path/to/ISI/records.txt' |
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filter => sub { |
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my ($l,$field_nr) = @_; |
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# do something with $l which is line of input file |
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return $l; |
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}, |
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} |
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|
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Options: |
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|
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=over 4 |
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|
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=item path |
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|
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path to ISI export file |
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|
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=back |
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|
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=cut |
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|
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our $subfields = { |
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'CR' => sub { |
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my $full_cr = shift; |
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my @v = split(/, /, $full_cr); |
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my $f = { full => $full_cr }; |
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foreach ( qw/author year reference volume page doi/ ) { |
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if ( my $tmp = shift @v ) { |
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$f->{$_} = $tmp; |
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} |
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} |
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if ( $f->{author} =~ /^\*(.+)/ ) { |
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delete $f->{author}; |
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$f->{institution} = $1; |
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} |
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$f->{doi} =~ s{DOI\s+}{} if $f->{doi}; # strip DOI prefix |
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return $f; |
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}, |
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}; |
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|
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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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|
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my $arg = {@_}; |
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|
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open( my $fh, '<', $arg->{path} ) || confess "can't open $arg->{path}: $!"; |
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|
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my ( $format, $version ); |
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|
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my $line = <$fh>; |
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chomp($line); |
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if ( $line =~ /^FN\s(.+)$/) { |
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$format = $1; |
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} else { |
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die "first line of $arg->{path} has to be FN, but is: $line"; |
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} |
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|
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$line = <$fh>; |
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chomp($line); |
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if ( $line =~ /^VR\s(.+)$/) { |
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$version = $1; |
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} else { |
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die "second line of $arg->{path} has to be VN, but is: $line"; |
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} |
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|
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warn "I: $arg->{path} $format $version - generating record offsets\n"; |
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|
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$self->{fh} = $fh; |
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$self->{record_offset} = []; |
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$self->{offset} ||= 0; |
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|
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while( $line = <$fh> ) { |
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chomp($line); |
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next unless $line eq 'ER'; |
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push @{ $self->{record_offset} }, tell($fh); |
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last if $self->{limit} && $#{ $self->{record_offset} } >= $self->{limit} - 1 + $self->{offset}; |
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} |
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push @{ $self->{record_offset} }, tell($fh); # end of file |
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|
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warn "I $arg->{path} read ", tell($fh), " bytes $#{ $self->{record_offset} } records\n"; |
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|
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return $self; |
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} |
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|
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|
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|
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=head2 fetch_rec |
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Return record with ID C<$mfn> from database |
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|
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my $rec = $input->fetch_rec( $mfn, $filter_coderef ); |
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|
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=cut |
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|
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sub fetch_rec { |
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my ( $self, $mfn, $filter_coderef ) = @_; |
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|
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seek $self->{fh}, $self->{record_offset}->[ $mfn - 1 ], 0; |
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|
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my $tag; |
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my $rec; |
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|
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my $fh = $self->{fh}; |
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|
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while( my $line = <$fh> ) { |
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chomp($line); |
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my $v; |
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|
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if ( $line eq 'EF' ) { |
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return; |
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} elsif ( $line eq 'ER' ) { |
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|
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$line = <$fh>; |
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chomp $line; |
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die "expected blank like in ",$self->{path}, " +$.: $line" unless $line eq ''; |
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|
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# join tags |
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foreach ( qw/AB DE ID TI SO RP SC FU FX PA JI/ ) { |
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$rec->{$_} = join(' ', @{ $rec->{$_} }) if defined $rec->{$_}; |
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} |
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|
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# split on ; |
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foreach ( qw/ID SC DE/ ) { |
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$rec->{$_} = [ split(/;\s/, $rec->{$_}) ] if defined $rec->{$_}; |
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} |
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|
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$rec->{'000'} = [ $mfn ]; |
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warn "## mfn $mfn" if $debug; |
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return $rec; |
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|
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} elsif ( $line =~ /^(\S\S)\s(.+)$/ ) { |
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$tag = $1; |
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$v = $2; |
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} elsif ( $line =~ /^\s{3}(.+)$/ ) { |
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$v = $1; |
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if ( $tag eq 'CR' && $v =~ m{DOI$} ) { |
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my $doi = <$fh>; |
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chomp($doi); |
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$doi =~ s{^\s{3}}{ } || die "can't find DOI in: $doi"; |
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$v .= $doi; |
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} |
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} elsif ( $line =~ m{^(\S\S)\s*$} ) { |
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warn "# $self->{path} +$. empty |$line|\n"; |
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} elsif ( $line ne '' ) { |
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warn "E: $self->{path} +$ | can't parse |$line|"; |
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} |
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|
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if ( defined $v ) { |
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$v = $subfields->{$tag}->($v) if defined $subfields->{$tag}; |
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|
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warn "## $tag: ", sub { dump( $v ) } if $debug; |
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push @{ $rec->{$tag} }, $v; |
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} |
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} |
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|
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warn "can't get full record $mfn got ", dump $rec; |
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return $rec; |
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} |
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|
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|
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=head2 size |
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|
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Return number of records in database |
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|
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my $size = $input->size; |
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|
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=cut |
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|
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sub size { |
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my $self = shift; |
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my $size = $#{ $self->{record_offset} }; |
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return 0 if $size < 0; |
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# no need for +1 since we record end of file as last record |
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return $size - $self->{offset}; |
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} |
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|
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|
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=head1 AUTHOR |
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|
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Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
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|
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=head1 COPYRIGHT & LICENSE |
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|
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Copyright 2009 Dobrica Pavlinusic, All Rights Reserved. |
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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|
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=cut |
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|
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1; # End of WebPAC::Input::ISI |
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