script/korapxml2conllu

#!/usr/bin/env perl
use strict;
use warnings;
use POSIX;
use Log::Any '$log';
use Log::Any::Adapter;
use Pod::Usage;
use Getopt::Long qw(GetOptions :config no_auto_abbrev);
use Encode;

my $MAX_SENTENCE_LENGTH=10000;
my $COMMENT_START="#";
my $COMMENT_END="";

my $test=0;
my $text_no=0;
my %opts;
my %plain_texts;
my %sentence_ends;
my %metadata;

my $offsets = 1;
my $comments = 1;
my $extract_metadata = 0;
my @extract_metadata_regex;

my $lm_training_data = 0;

our $VERSION = '0.5.0';

our $VERSION_MSG = "\nkorapxml2conllu - v$VERSION\n";

use constant {
  # Set to 1 for minimal more debug output (no need to be parametrized)
  DEBUG => $ENV{KORAPXMLCONLLU_DEBUG} // 0
};

GetOptions(
  'sigle-pattern|p=s'            => \(my $sigle_pattern = ''),
  'extract-attributes-regex|e=s' => \(my $extract_attributes_regex = ''),
  's-bounds-from-morpho'         => \(my $s_bounds_from_morpho = 0),
  'log|l=s'                      => \(my $log_level = 'warn'),
  'columns|c=n'                  => \(my $columns = 10),
  'word2vec|lm-training-data!'   => \$lm_training_data,
  'token-separator|s=s'          => \(my $token_separator = "\n"),
  'offsets!'                     => \$offsets,
  'comments!'                    => \$comments,
  'extract-metadata-regex|m=s@'  => \@extract_metadata_regex,
  'help|h'                       => sub {
    pod2usage(
      -verbose  => 99,
      -sections => 'NAME|DESCRIPTION|SYNOPSIS|ARGUMENTS|OPTIONS|EXAMPLES',
      -msg      => $VERSION_MSG,
      -output   => '-'
    )
  },
  'version|v'                    => sub {
    pod2usage(
      -verbose => 0,
      -msg     => $VERSION_MSG,
      -output  => '-'
    );
  }
);

if (@extract_metadata_regex) {
  $extract_metadata = 1;
}

# Establish logger
binmode(STDERR, ':encoding(UTF-8)');
Log::Any::Adapter->set('Stderr', log_level => $log_level);
$log->notice('Debugging is activated') if DEBUG;

if ($lm_training_data) {
  $columns = 1;
  $comments = 0;
  $offsets = 0;
  $token_separator = " ";
}

my $docid="";
my ($current_id, $current_from, $current_to, $token);
my $current;
my ($unknown, $known) = (0, 0);
my @current_lines;
my %processedFilenames;
my $zipsiglepattern = (defined($ENV{ZIPSIGLEPATTERN})? $ENV{ZIPSIGLEPATTERN} : "");
my $baseOnly;
my %extras;

my ($ID_idx, $FORM_idx, $LEMMA_idx, $UPOS_idx, $XPOS_idx, $FEATS_idx, $HEAD_idx, $DEPREC_idx, $DEPS_idx, $MISC_idx) = (0..9);

my $UNZIP = `sh -c 'command -v unzip'`;
chomp $UNZIP;


if ($UNZIP eq '') {
  warn('No unzip executable found in PATH.');
  return 0;
};

foreach my $morpho_zip (@ARGV) {
  die "cannot open $morpho_zip" if(! -r $morpho_zip);
  my $data_zip = $morpho_zip;
  if ($data_zip !~ /\.zip/ && $data_zip =~ /\.conllu?/i) {
    open(CONLL, "<$data_zip") or die "cannot open $data_zip";
    while(<CONLL>) {
      print;
    }
    close(CONLL);
    next;
  }
  $data_zip =~ s/\.([^\/.]+)\.zip$/.zip/;
  my $foundry = $1;
  die "cannot open data file $data_zip corresponding to $morpho_zip" if(! -r $data_zip);
  
  my $first=1;
  my @conll = ("_") x 10;
  my $filename;

  $baseOnly = $morpho_zip eq $data_zip;
  my ($morphoOrTokenCommand, $plaintextAndStructureCommand);
  my $zip_content_pattern = "[sd][ta]*";
  if ($extract_metadata) {
    $zip_content_pattern = "[sdh][tae]*";
  }
  if (!$baseOnly) {
    $morphoOrTokenCommand = "$UNZIP -c $morpho_zip '*/${sigle_pattern}*/*/*/morpho.xml' $zipsiglepattern |";
    if ($extract_attributes_regex || !$s_bounds_from_morpho) {
      $plaintextAndStructureCommand = "$UNZIP -c $data_zip '*/${sigle_pattern}*/*/$zip_content_pattern.xml' $zipsiglepattern |";
    } else {
      $log->debug("Not reading structure information.");
      $plaintextAndStructureCommand = "$UNZIP -c $data_zip '*/${sigle_pattern}*/*/data.xml' $zipsiglepattern |";
    }
  } else {
    $foundry = "base";
    $morphoOrTokenCommand = "$UNZIP -l $morpho_zip '*/${sigle_pattern}*/*/*/morpho.xml' $zipsiglepattern";
    if (`$morphoOrTokenCommand` !~ /morpho\.xml/) {
      $morphoOrTokenCommand =~ s/morpho\.xml/tokens.xml/;
    } else {
      $baseOnly = 0;
    }
    $morphoOrTokenCommand =~ s/-l/-c/;
    $morphoOrTokenCommand .= ' |';
    $plaintextAndStructureCommand = "$UNZIP -c $data_zip " . "'*/${sigle_pattern}*/*/$zip_content_pattern.xml' " . "$zipsiglepattern |";
  }

  open (MORPHO_OR_TOKENPIPE, $morphoOrTokenCommand) or die "cannot unzip $morpho_zip";
  open (PLAINTEXTPIPE, $plaintextAndStructureCommand) or die "cannot unzip $data_zip";
  print "$COMMENT_START foundry = $foundry$COMMENT_END\n" if ($comments);
  while (<MORPHO_OR_TOKENPIPE>) {
    if (/^  inflating: (.*)/) {
      $filename=$1;
      while($processedFilenames{$filename} && !eof(MORPHO_OR_TOKENPIPE)) {
        $log->warn("$filename already processed");
        while (<MORPHO_OR_TOKENPIPE>) {
          last if(/\s+inflating:\s+(.*)/);
        }
        $filename=$1 if(!eof(MORPHO_OR_TOKENPIPE) && /\s+inflating:\s+(.*)/);
      }
    } elsif(m@^\s*<layer\s+.*docid="([^"]+)"@) {
      last if($test && $text_no++ > 3);
      if(!$first) {
        closeDoc(0);
      }
      $processedFilenames{$filename}=1;
      $docid=$1;
      @current_lines=();
      $known=$unknown=0;
      $current="";
      if ($first) {
          $first = 0;
      }
      if(!fetch_plaintext($docid)) { # skip this text
        while (<MORPHO_OR_TOKENPIPE>) {
          last if(m@</layer>@);
        }
      }
      print STDOUT "$COMMENT_START filename = $filename$COMMENT_END\n$COMMENT_START text_id = $docid$COMMENT_END\n" if($comments);
      $log->debug("Analyzing $docid");
    } elsif (m@^\s*<f\s+.*name="([^"]+)">([^<]+)</f>@) {
      if ($1 eq "lemma") {
        $conll[$LEMMA_idx] = $2;
        $conll[$LEMMA_idx] =~ s/[\t\n\r]//g; # make sure that lemmas never contain tabs or newlines
        if($conll[$LEMMA_idx] eq 'UNKNOWN') {
          $conll[$LEMMA_idx] = "--";
          $unknown++;
        } else {
          $known++;
        }
      } elsif ($1 eq 'pos' || $1 eq "ctag") {
        $unknown++;
        $conll[$XPOS_idx] = $conll[$UPOS_idx] = $2;
      } elsif ($1 eq 'msd') {
        $conll[$FEATS_idx] = $2;
      } elsif ($1 eq 'certainty') {
        $conll[$MISC_idx] = $2;
      }
    } elsif (/<span /) {
      my $last_from = $current_from // -1;
      ($current_id) = /id="[^0-9]*([^\"]*)"/;
      ($current_from) = /from="([^\"]*)"/;
      ($current_to) = /to="([^\"]*)"/;
      if($extract_attributes_regex) {
        for (my $i = $last_from + 1; $i <= $current_from; $i++) {
          if ($extras{$docid}{$i}) {
            $current .= $extras{$docid}{$i};
            undef $extras{$docid}{$i};
          }
        }
      }
#      $log->debug("found span: $current_id $current_from $current_to");
      $token = substr($plain_texts{$docid}, $current_from, $current_to - $current_from);
      if (!defined $token) {
        $log->warn("$docid: could not retrieve token at $current_from-$current_to/", length($plain_texts{$docid}), " - ending with: ", substr($plain_texts{$docid},length($plain_texts{$docid})-10));
        $token = "_";
      }
      $token=~s/[\t\n\r]//g; # make sure that tokens never contain tabs or newlines
      @conll = ("_") x 10;
      $conll[$FORM_idx] = encode("utf-8", $token);
      if($baseOnly) {
        my @vals = ($current_from, $current_to);
#        $log->debug("joining : ", join(" ", @vals));
        push @current_lines, \@vals;
        $known++;
        $conll[$ID_idx] = $#current_lines+1;
        if ($columns == 1) {
          $current .= "$conll[1]$token_separator" ;
        } else {
          $current .= join("\t", @conll[0..$columns-1]) . "\n"; # conll columns
        }
        fetch_plaintext($docid);
        if ($sentence_ends{$docid}{$current_to}) {
          $log->debug("Using sentence end for $docid \@$current_to");
          $current .= "\n";
          printTokenRanges();
          if ($extract_metadata) {
            for (my $i = 0; $i < @extract_metadata_regex; $i++) {
              if(!defined($metadata{$docid}[$i])) {
                $log->warn("$docid: metadata matching /$extract_metadata_regex[$i]/ was not found, using empty string instead");
                $metadata{$docid}[$i]="";
              }
              print "$metadata{$docid}[$i]\t";
            }
          }
          $current =~ s/ $//;
          print STDOUT $current;
          $current = "";
          $known = 0;
          $unknown = 0;
          @current_lines = ();
        }
      }
    } elsif (m@^\s*</fs>@) {
      my @vals = ($current_from, $current_to);
#      $log->debug("joining : ", join(" ", @vals));
      push @current_lines, \@vals;
      # convert gathered information to CONLL
      $conll[$ID_idx] = $#current_lines+1;
      if ($columns == 1) {
        $current .= "$conll[1]\n";
      } else {
        $current .= join("\t", @conll[0..$columns-1]) . "\n"; # conll columns
      }
      if($sentence_ends{$docid}{$current_to} || ($s_bounds_from_morpho && $conll[$XPOS_idx] eq '$.' || ($conll[$XPOS_idx] eq 'SENT' && $token eq '.')) || $known + $unknown >= $MAX_SENTENCE_LENGTH) {
        $log->debug("Using sentence end for $docid \@$current_to");
        $current .= "\n";
        if($known + $unknown > 0) { # only print sentence if it contains some words
          printTokenRanges();
          print STDOUT $current;
        }
        $current=""; $known=0; $unknown=0;
        @current_lines = ();
      }
      while (<MORPHO_OR_TOKENPIPE>) {
        last if (m@</span>@);    # only consider first interpretation
      }
    }
  }
  $current .= "\n";
  closeDoc(1);
  close(MORPHO_OR_TOKENPIPE);
  close(PLAINTEXTPIPE);
}
exit;

sub printTokenRanges {
  return if(!$offsets);
  print "$COMMENT_START start_offsets = ", $current_lines[0]->[0];
  foreach my $t (@current_lines) {
    print STDOUT " $t->[0]";
  }
  print "$COMMENT_END\n$COMMENT_START end_offsets = ", $current_lines[$#current_lines]->[1] if($comments);
  foreach my $t (@current_lines) {
    print STDOUT " $t->[1]";
  }
  print "$COMMENT_END\n";
}

sub closeDoc {
  $log->debug("closing doc");
  if($known + $unknown > 0) { # only parse a sentence if it has some words
    chomp $current;
    chomp $current;
    chomp $current;
    $current .= "\n\n";
    printTokenRanges();
    print STDOUT $current;
  }
}

# read data.xml to figure out the tokens
# (ideally tokens should also be in in morpho.xml, but they are not)
sub fetch_plaintext {
  my ($target_id) = @_;
  my $docid;
  my $text_started=0;
  my $text_count = 0;
  my ($current_id, $current_from, $current_to);

  if($plain_texts{$target_id} && ($s_bounds_from_morpho || $sentence_ends{$target_id}) && (!$extract_metadata || $metadata{$target_id})) {
    $log->debug("Already got $target_id");
    return 1;
  }
  while(<PLAINTEXTPIPE>) {
    if ($extract_metadata) {
      if (/<textSigle>([^<]+)/) {
        $docid = $1;
        $docid =~ s@/@_@;
        $log->debug("textsigle=$docid");
      }
      for (my $i=0; $i < @extract_metadata_regex; $i++) {
        if ($_ =~ /$extract_metadata_regex[$i]/) {
          $metadata{$docid}[$i]=$1;
        }
      }
    }
    if(/<raw_text[^>]+docid="([^"]*)/) {
      $docid=$1;
      $log->debug("Getting plain text for $docid");
      $text_started=0;
    } elsif(/<layer[^>]+docid="([^"]*)/) {
      $docid=$1;
    } elsif(m@<span @) {
        ($current_id) = /id="[^0-9]*([^\"]*)"/;
        ($current_from) = /from="([^\"]*)"/;
        ($current_to) = /to="([^\"]*)"/;
    } elsif(m@<f\s[^>]*>s</f>@) {
      if ($s_bounds_from_morpho) {
        $log->debug("Ignoring sentence end for $docid \@$current_to because of --s-bounds-from-morpho");
      } else {
        $log->debug("Found sentence end for $docid \@$current_to");
        $sentence_ends{$docid}{$current_to} = 1;
      }
    } elsif($extract_attributes_regex && m@<f\sname="name"[^>]*>([^<]+)</f>@) {
      my $current_element = $1;
      $log->debug("Looking for matching attributes in $docid");
      while(<PLAINTEXTPIPE>) {
        last if(m@</fs>@);
        if(m@<f\sname="([^"]+)"[^>]*>([^<]+)</f>@) {
          my $current_node = "$current_element/$1";
          my $value = $2;
          if ($current_node =~ /$extract_attributes_regex/) {
            $log->debug("Found matching attribute: $docid - $current_node = $value");
            $extras{$docid}{$current_from} .= "# $current_node = $value\n";
          }
        }
      }
    } elsif (m@<text>(.*)</text>@) {
      $_= decode("utf-8", $1, Encode::FB_DEFAULT);
      s/&lt;/</go;
      s/&gt;/>/go;
      s/&amp;/&/go;
      tr/…•⋅»«ˮ“”„›‹ʼ‘’‚′‐‑‒–—―⁓⁻₋−﹣－/...""""""'''''''-/;
      $plain_texts{$docid} = $_;
      last if(!$extract_attributes_regex && ($text_count++ > 1 && $plain_texts{$target_id} && (!$extract_metadata || $metadata{$target_id})));
    } elsif (m@<text>(.*)@) {
      $_= decode("utf-8", $1, Encode::FB_DEFAULT);
      s/&lt;/</go;
      s/&gt;/>/go;
      s/&amp;/&/go;
      tr/…•⋅»«ˮ“”„›‹ʼ‘’‚′‐‑‒–—―⁓⁻₋−﹣－/...""""""'''''''-/;
      $plain_texts{$docid} = "$_ ";
      $text_started=1;
    } elsif ($text_started && m@(.*)</text>@) {
      $_= decode("utf-8", $1, Encode::FB_DEFAULT);
      s/&lt;/</go;
      s/&gt;/>/go;
      s/&amp;/&/go;
      tr/…•⋅»«ˮ“”„›‹ʼ‘’‚′‐‑‒–—―⁓⁻₋−﹣－/...""""""'''''''-/;
      $plain_texts{$docid} .= $_;
      $text_started=0;
      last if(!$extract_attributes_regex && ($text_count++ > 1 && $plain_texts{$target_id} && (!$extract_metadata || $metadata{$target_id})));
    } elsif ($text_started) {
      chomp;
      $_ = decode("utf-8", $_, Encode::FB_DEFAULT) . ' ';
      s/&lt;/</go;
      s/&gt;/>/go;
      s/&amp;/&/go;
      tr/…•⋅»«ˮ“”„›‹ʼ‘’‚′‐‑‒–—―⁓⁻₋−﹣－/...""""""'''''''-/;
      $plain_texts{$docid} .= $_;
    }
  }
  $log->debug("Got plain text for $docid");
  if(defined($ENV{PLAINTEXTFILTER})) {
    if ($plain_texts{$docid} !~ $ENV{PLAINTEXTFILTER}) {
      $plain_texts{$docid} = undef;
      $log->info("Skipping $docid");
      return(undef);
    } else {
      $log->debug("Using $docid");
    }
  } 
  return(1);
}

=pod

=encoding utf8

=head1 NAME

korapxml2conllu - Conversion of KorAP-XML zips to CoNLL-U

=head1 SYNOPSIS

  korapxml2conllu zca15.tree_tagger.zip > zca15.conllu

=head1 DESCRIPTION

C<korapxml2conllu> is a script to Convert L<KorAP-XML format|https://github.com/KorAP/KorAP-XML-Krill#about-korap-xml> base or morpho zips to CoNLL(-U) format with all information necessary
 for reconstruction in comment lines.

=head1 INSTALLATION

  $ cpanm https://github.com/KorAP/KorAP-XML-CoNLL-U.git

=head1 OPTIONS

=over 2

=item B<--sigle-pattern|-p>

Convert only texts from the KorAP XML zip files with folder names (i.e. sigles) matching the glob pattern.

=item B<--extract-attribute-pattern|-e>

Extract element/attribute regular expressions to comments.

=item B<--columns>=I<int> | B<-c> I<int>

Print n columns (default: 10). If n=1, only the token itself is printed.

=item B<--s-bounds-from-morpho>

Get sentence boundary information from tagger output rather than from s annotation in structure.xml files.

=item B<--token-separator>=I<string>

Token separator.

=item B<--(no)comments>

Switch comment printing on or off (default: on).

=item B<--(no)offsets>

Switch offsets printing on or off (default: on).

=item B<--word2vec>

Print output in word2vec (tokenized) one sentence per line format.

=item B<--extract-metadata-regex|-m>

Can be used to extract and print strings from the text headers. Currently only works together with --word2vec option.
For example:

  korapxml2conllu -m '<textSigle>([^<.]+)' -m '<creatDate>([^<]{7})' --word2vec t/data/wdf19.zip

Will print the document sigle, year and month of the creation date and one sentence per line, separated by tabs.

=item B<--help|-h>

Print help information.

=item B<--version|-v>

Print version information.


=item B<--log|-l>

Loglevel for I<Log::Any>. Defaults to C<warn>.

=back

=head1 EXAMPLES

=head2 Extract to CoNNL-U with posting and div ids:

 korapxml2conllu -e '(posting/id|div/id)' t/data/wdf19.zip

=head2 Extract to word2vec input format metadata columns:

 korapxml2conllu --word2vec t/data/wdf19.zip

=head1 COPYRIGHT AND LICENSE

Copyright (C) 2021-2022, L<IDS Mannheim|https://www.ids-mannheim.de/>

Author: Marc Kupietz

Contributors: Nils Diewald

L<KorAP::XML::CoNNL-U> is developed as part of the L<KorAP|https://korap.ids-mannheim.de/>
Corpus Analysis Platform at the
L<Leibniz Institute for the German Language (IDS)|http://ids-mannheim.de/>,
member of the
L<Leibniz-Gemeinschaft|http://www.leibniz-gemeinschaft.de/>.

This program is free software published under the
L<BSD-2 License|https://opensource.org/licenses/BSD-2-Clause>.