source: gsdl/trunk/perllib/mgppbuilder.pm@ 15687

###########################################################################
#
# mgppbuilder.pm -- MGBuilder object
# A component of the Greenstone digital library software
# from the New Zealand Digital Library Project at the 
# University of Waikato, New Zealand.
#
# Copyright (C) 1999 New Zealand Digital Library Project
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
###########################################################################

package mgppbuilder;

use basebuilder;
use classify;
use cfgread;
use colcfg;
use plugin;
use util;
use FileHandle;

sub BEGIN {
    @mgppbuilder::ISA = ('basebuilder');
}



our %level_map = ('document'=>'Doc',
          'section'=>'Sec',
          'paragraph'=>'Para',
          'Doc'=>'_textdocument_',
          'Sec'=>'_textsection_',
          'Para'=>'_textparagraph_');

our %wanted_index_files = ('td'=>1,
               't'=>1,
               'tl'=>1,
               'ti'=>1,
               'idb'=>1,
               'ib1'=>1,
               'ib2'=>1,
               'ib3'=>1,
               'ib4'=>1,
               'ib5'=>1,
               'ib6'=>1,
               'ib7'=>1,
               'i'=>1,
               'il'=>1,
               'w'=>1,
               'wa'=>1);

# change this so a user can add their own ones in via a file or cfg
#add AND, OR, NOT NEAR to this list - these cannot be used as field names
#also add the level names (Doc, Sec, Para)
our %static_indexfield_map = ('Title'=>'TI',
              'TI'=>1,
              'Subject'=>'SU',
              'SU'=>1,
              'Creator'=>'CR',
              'CR'=>1,
              'Organization'=>'ORG',
              'ORG'=>1,
              'Source'=>'SO',
              'SO'=>1,
              'Howto'=>'HT',
              'HT'=>1,
              'ItemTitle'=>'IT',
              'IT'=>1,
              'ProgNumber'=>'PN',
              'PN'=>1,
              'People'=>'PE',
              'PE'=>1,
              'Coverage'=>'CO',
              'CO'=>1,
              'allfields'=>'ZZ',
              'ZZ'=>1,
              'text'=>'TX',
              'TX'=>1,
              'AND'=>1,
              'OR'=>1,
              'NOT'=>1,
              'NEAR'=>1,
              'Doc'=>1,
              'Sec'=>1,
              'Para'=>1);

my $maxdocsize = $basebuilder::maxdocsize;

sub new {
    my $class = shift(@_);

    my $self = new basebuilder (@_);
    $self = bless $self, $class;

    $self->{'indexfieldmap'} = \%static_indexfield_map;

    # get the levels (Section, Paragraph) for indexing and compression
    $self->{'levels'} = {};
    $self->{'levelorder'} = ();
    if (defined $self->{'collect_cfg'}->{'levels'}) {
        foreach my $level ( @{$self->{'collect_cfg'}->{'levels'}} ){
        $level =~ tr/A-Z/a-z/;
            $self->{'levels'}->{$level} = 1;
        push (@{$self->{'levelorder'}}, $level);
        }
    } else { # default to document
    $self->{'levels'}->{'document'} = 1;
    push (@{$self->{'levelorder'}}, 'document');
    }
    
    $self->{'buildtype'} = "mgpp";

    return $self;
}

sub generate_index_list {
    my $self  = shift (@_);
    
    # sort out the indexes
    #indexes are specified with spaces, but we put them into one index
    my $indexes = $self->{'collect_cfg'}->{'indexes'};
    $self->{'collect_cfg'}->{'indexes'} = [];
    push (@{$self->{'collect_cfg'}->{'indexes'}}, join(';', @$indexes).";");
}

sub generate_index_options {
    my $self = shift (@_);

    $self->{'casefold'} = 0;
    $self->{'stem'} = 0;
    $self->{'accentfold'} = 0; 
    
    if (!defined($self->{'collect_cfg'}->{'indexoptions'})) {
    # just use default options
    $self->{'casefold'} = 1;
    $self->{'stem'} = 1;
    $self->{'accentfold'} = 1;
    } else {
    foreach my $option (@{$self->{'collect_cfg'}->{'indexoptions'}}) {
        if ($option =~ /stem/) {
        $self->{'stem'} = 1;
        } elsif ($option =~ /casefold/) {
        $self->{'casefold'} = 1;
        } elsif ($option =~ /accentfold/) {
        $self->{'accentfold'} = 1;
        }
    }
    }
    
    # now we record this for the build cfg
    $self->{'stemindexes'} = 0;
    if ($self->{'casefold'}) {
    $self->{'stemindexes'} += 1;
    }
    if ($self->{'stem'}) {
    $self->{'stemindexes'} += 2;
    }
    if ($self->{'accentfold'}) {
    $self->{'stemindexes'} += 4;
    }
    
}

sub default_buildproc {
    my $self  = shift (@_);

    return "mgppbuildproc";
}

sub compress_text {

    my $self = shift (@_);

    # we don't do anything if we don't want compressed text
    return if $self->{'no_text'};
    
    my ($textindex) = @_;

    my $exedir = "$ENV{'GSDLHOME'}/bin/$ENV{'GSDLOS'}";
    my $exe = &util::get_os_exe ();
    my $mgpp_passes_exe = &util::filename_cat($exedir, "mgpp_passes$exe");
    my $mgpp_compression_dict_exe = &util::filename_cat($exedir, "mgpp_compression_dict$exe");
    my $outhandle = $self->{'outhandle'};

    my $maxnumeric = $self->{'maxnumeric'};
    
    &util::mk_all_dir (&util::filename_cat($self->{'build_dir'}, "text"));

    my $collect_tail = &util::get_dirsep_tail($self->{'collection'});
    my $basefilename = &util::filename_cat("text",$collect_tail);
    my $fulltextprefix = &util::filename_cat ($self->{'build_dir'}, $basefilename);
    
    my $osextra = "";
    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
    $fulltextprefix =~ s@/@\\@g;
    } 
    else {
    $osextra = " -d /";
    }


    # define the section names and possibly the doc name for mgpasses
    # the compressor doesn't need to know about paragraphs - never want to 
    # retrieve them
    
    # always use Doc and Sec levels
    my $mgpp_passes_sections = "-J ". $level_map{"document"} ." -K " . $level_map{"section"} ." ";

    print $outhandle "\n*** creating the compressed text\n" if ($self->{'verbosity'} >= 1);
    print STDERR "<Stage name='CompressText'>\n" if $self->{'gli'};

    # collect the statistics for the text
    # -b $maxdocsize sets the maximum document size to be 12 meg
    print $outhandle "\n    collecting text statistics (mgpp_passes -T1)\n"  if ($self->{'verbosity'} >= 1);
    print STDERR "<Phase name='CollectTextStats'/>\n" if $self->{'gli'};

    my ($handle);
    if ($self->{'debug'}) {
    $handle = STDOUT;
    } else {
    if (!-e "$mgpp_passes_exe" || 
        !open (PIPEOUT, "| mgpp_passes$exe  -M $maxnumeric $mgpp_passes_sections -f \"$fulltextprefix\" -T1 $osextra")) {
        print STDERR "<FatalError name='NoRunMGPasses'>\n</Stage>\n" if $self->{'gli'};
        die "mgppbuilder::compress_text - couldn't run $mgpp_passes_exe\n";
    }
    $handle = mgppbuilder::PIPEOUT;
    }
    
    my $db_level = "section";

    $self->{'buildproc'}->set_output_handle ($handle);
    $self->{'buildproc'}->set_mode ('text');
    $self->{'buildproc'}->set_index ($textindex);
    $self->{'buildproc'}->set_indexing_text (0);
    $self->{'buildproc'}->set_indexfieldmap ($self->{'indexfieldmap'});
    $self->{'buildproc'}->set_levels ($self->{'levels'});                      
    $self->{'buildproc'}->set_db_level ($db_level);                       
    $self->{'buildproc'}->reset();
    &plugin::begin($self->{'pluginfo'}, $self->{'source_dir'}, 
           $self->{'buildproc'}, $self->{'maxdocs'});
    &plugin::read ($self->{'pluginfo'}, $self->{'source_dir'}, 
           "", {}, $self->{'buildproc'}, $self->{'maxdocs'}, 0, $self->{'gli'});
    &plugin::end($self->{'pluginfo'});
    close (PIPEOUT);

    close ($handle) unless $self->{'debug'};

    $self->print_stats();

    # create the compression dictionary
    # the compression dictionary is built by assuming the stats are from a seed
    # dictionary (-S), if a novel word is encountered it is spelled out (-H),
    # and the resulting dictionary must be less than 5 meg with the most 
    # frequent words being put into the dictionary first (-2 -k 5120)
    # note: these options are left over from mg version
    if (!$self->{'debug'}) {
    print $outhandle "\n    creating the compression dictionary\n"  if ($self->{'verbosity'} >= 1);
    print STDERR "<Phase name='CreatingCompress'/>\n" if $self->{'gli'};
    if (!-e "$mgpp_compression_dict_exe") {
        print STDERR "<FatalError name='NoRunMGCompress'/>\n</Stage>\n" if $self->{'gli'};
        die "mgppbuilder::compress_text - couldn't run $mgpp_compression_dict_exe\n";
    }
    system ("mgpp_compression_dict$exe -f \"$fulltextprefix\" -S -H -2 -k 5120 $osextra");

    if (!$self->{'debug'}) {
        if (!-e "$mgpp_passes_exe" || 
        !open ($handle, "| mgpp_passes$exe  -M $maxnumeric $mgpp_passes_sections -f \"$fulltextprefix\" -T2 $osextra")) {
        print STDERR "<FatalError name='NoRunMGPasses'/>\n</Stage>\n" if $self->{'gli'};
        die "mgppbuilder::compress_text - couldn't run $mgpp_passes_exe\n";
        }
    }
    }
    else {
    print STDERR "<Phase name='SkipCreatingComp'/>\n" if $self->{'gli'};
    }

    $self->{'buildproc'}->reset();
    # compress the text
    print $outhandle "\n    compressing the text (mgpp_passes -T2)\n"  if ($self->{'verbosity'} >= 1);
    print STDERR "<Phase name='CompressingText'/>\n" if $self->{'gli'};

    &plugin::read ($self->{'pluginfo'}, $self->{'source_dir'}, 
           "", {}, $self->{'buildproc'}, $self->{'maxdocs'}, 0, $self->{'gli'});
    close ($handle) unless $self->{'debug'};

    $self->print_stats();
    print STDERR "</Stage>\n" if $self->{'gli'};
}


sub build_indexes_extra {
    my $self = shift(@_);
    #define the final field lists
    $self->make_final_field_list();
}    

# creates directory names for each of the index descriptions
sub create_index_mapping {
    my $self = shift (@_);
    my ($indexes) = @_;

    my %mapping = ();

    $mapping{'indexmaporder'} = [];
    $mapping{'subcollectionmaporder'} = [];
    $mapping{'languagemaporder'} = [];
    
    # dirnames is used to check for collisions. Start this off
    # with the manditory directory names
    my %dirnames = ('text'=>'text',
            'extra'=>'extra');
    my %pnames = ('index' => {}, 'subcollection' => {}, 'languages' => {});

    foreach my $index (@$indexes) {
    my ($fields, $subcollection, $languages) = split (":", $index);
    
    # we only ever have one index, and its called 'idx'
    my $pindex = 'idx';
    
    # next comes a processed version of the subcollection if there is one.
    my $psub = $self->process_field ($subcollection);
    $psub = lc ($psub);

    # next comes a processed version of the language if there is one.
    my $plang = $self->process_field ($languages);
    $plang = lc ($plang);

    my $dirname = $pindex . $psub . $plang;

    # check to be sure all index names are unique
    while (defined ($dirnames{$dirname})) {
        $dirname = $self->make_unique (\%pnames, $index, \$pindex, \$psub, \$plang);
    }

    $mapping{$index} = $dirname;

    # store the mapping orders as well as the maps
    # also put index, subcollection and language fields into the mapping thing - 
    # (the full index name (eg text:subcol:lang) is not used on
    # the query page) -these are used for collectionmeta later on
    if (!defined $mapping{'indexmap'}{"$fields"}) {
        $mapping{'indexmap'}{"$fields"} = $pindex;
        push (@{$mapping{'indexmaporder'}}, "$fields");
        if (!defined $mapping{"$fields"}) {
        $mapping{"$fields"} = $pindex;
        }   
    }
    if ($psub =~ /\w/ && !defined ($mapping{'subcollectionmap'}{$subcollection})) {
        $mapping{'subcollectionmap'}{$subcollection} = $psub;
        push (@{$mapping{'subcollectionmaporder'}}, $subcollection);
        $mapping{$subcollection} = $psub;
    }
    if ($plang =~ /\w/ && !defined ($mapping{'languagemap'}{$languages})) {
        $mapping{'languagemap'}{$languages} = $plang;
        push (@{$mapping{'languagemaporder'}}, $languages);
        $mapping{$languages} = $plang;
    }
    $dirnames{$dirname} = $index;
    $pnames{'index'}->{$pindex} = "$fields";
    $pnames{'subcollection'}->{$psub} = $subcollection;
    $pnames{'languages'}->{$plang} = $languages;
    }

    return \%mapping;
}

sub make_unique {
    my $self = shift (@_);
    my ($namehash, $index, $indexref, $subref, $langref) = @_;
    my ($fields, $subcollection, $languages) = split (":", $index);

    if ($namehash->{'index'}->{$$indexref} ne "$fields") {
    $self->get_next_version ($indexref);
    } elsif ($namehash->{'subcollection'}->{$$subref} ne $subcollection) {
    $self->get_next_version ($subref);
    } elsif ($namehash->{'languages'}->{$$langref} ne $languages) {
    $self->get_next_version ($langref);
    }
    return "$$indexref$$subref$$langref";
}   


sub build_index {
    my $self = shift (@_);
    my ($index) = @_;
    my $outhandle = $self->{'outhandle'};

    # get the full index directory path and make sure it exists
    my $indexdir = $self->{'index_mapping'}->{$index};
    &util::mk_all_dir (&util::filename_cat($self->{'build_dir'}, $indexdir));

    my $collect_tail = &util::get_dirsep_tail($self->{'collection'});
    my $fullindexprefix = &util::filename_cat ($self->{'build_dir'}, 
                           $indexdir, 
                           $collect_tail);
    my $fulltextprefix = &util::filename_cat ($self->{'build_dir'}, "text", 
                           $collect_tail);

    # get any os specific stuff
    my $exedir = "$ENV{'GSDLHOME'}/bin/$ENV{'GSDLOS'}";

    my $exe = &util::get_os_exe ();
    my $mgpp_passes_exe = &util::filename_cat($exedir, "mgpp_passes$exe");

    # define the section names for mgpasses
    my $mgpp_passes_sections = "-J ". $level_map{"document"} ." -K " . $level_map{"section"} ." ";
    if ($self->{'levels'}->{'paragraph'}) {
    $mgpp_passes_sections .= "-K " . $level_map{'paragraph'}. " ";
    }

    my $mgpp_perf_hash_build_exe = 
    &util::filename_cat($exedir, "mgpp_perf_hash_build$exe");
    my $mgpp_weights_build_exe = 
    &util::filename_cat ($exedir, "mgpp_weights_build$exe");
    my $mgpp_invf_dict_exe = 
    &util::filename_cat ($exedir, "mgpp_invf_dict$exe");
    my $mgpp_stem_idx_exe =
    &util::filename_cat ($exedir, "mgpp_stem_idx$exe");

    my $maxnumeric = $self->{'maxnumeric'};

    my $osextra = "";
    if ($ENV{'GSDLOS'} =~ /^windows$/i) {
    $fullindexprefix =~ s@/@\\@g;
    } else {
    $osextra = " -d /";
    if ($outhandle ne "STDERR") {
        # so mgpp_passes doesn't print to stderr if we redirect output
        $osextra .= " 2>/dev/null";
    }
    }
 
    # get the index expression if this index belongs
    # to a subcollection
    my $indexexparr = [];
    my $langarr = [];
    # there may be subcollection info, and language info. 
    my ($fields, $subcollection, $language) = split (":", $index);
    my @subcollections = ();
    @subcollections = split /,/, $subcollection if (defined $subcollection);

    foreach $subcollection (@subcollections) {
    if (defined ($self->{'collect_cfg'}->{'subcollection'}->{$subcollection})) {
        push (@$indexexparr, $self->{'collect_cfg'}->{'subcollection'}->{$subcollection});
    } 
    }
    
    # add expressions for languages if this index belongs to
    # a language subcollection - only put languages expressions for the 
    # ones we want in the index
    
    my @languages = ();
    my $language_metadata = "Language";
    if (defined ($self->{'collect_cfg'}->{'language_metadata'})) {
    $language_metadata = $self->{'collect_cfg'}->{'language_metadata'};
    }
    @languages = split /,/, $language if (defined $language);
    foreach my $language (@languages) {
    my $not=0;
    if ($language =~ s/^\!//) {
        $not = 1;
    }
    if($not) {
        push (@$langarr, "!$language");
    } else {
        push (@$langarr, "$language");
    }
    }

    # Build index dictionary. Uses verbatim stem method
    print $outhandle "\n    creating index dictionary (mgpp_passes -I1)\n"  if ($self->{'verbosity'} >= 1);
    print STDERR "<Phase name='CreatingIndexDic'/>\n" if $self->{'gli'};
    my ($handle);
    if ($self->{'debug'}) {
    $handle = STDOUT;
    } else {
    if (!-e "$mgpp_passes_exe" || 
        !open (PIPEOUT, "| mgpp_passes$exe -M $maxnumeric $mgpp_passes_sections -f \"$fullindexprefix\" -I1 $osextra")) {
        print STDERR "<FatalError name='NoRunMGPasses'/>\n</Stage>\n" if $self->{'gli'};
        die "mgppbuilder::build_index - couldn't run $mgpp_passes_exe\n";
    }
    $handle = mgppbuilder::PIPEOUT;
    }
        
    # db_level is always section
    my $db_level = "section";

    # set up the document processr
    $self->{'buildproc'}->set_output_handle ($handle);
    $self->{'buildproc'}->set_mode ('text');
    $self->{'buildproc'}->set_index ($index, $indexexparr);
    $self->{'buildproc'}->set_index_languages ($language_metadata, $langarr) if (defined $language);
    $self->{'buildproc'}->set_indexing_text (1);
    $self->{'buildproc'}->set_indexfieldmap ($self->{'indexfieldmap'});
    $self->{'buildproc'}->set_levels ($self->{'levels'}); 
    $self->{'buildproc'}->set_db_level ($db_level);   
    
    $self->{'buildproc'}->reset();
    &plugin::read ($self->{'pluginfo'}, $self->{'source_dir'}, 
           "", {}, $self->{'buildproc'}, $self->{'maxdocs'}, 0, $self->{'gli'});
    close ($handle) unless $self->{'debug'};

    $self->print_stats();

    # now we check to see if the required files have been produced - if not we quit building this index so the whole process doesn't crap out.
    # we check on the .id file - index dictionary
    my $dict_file = "$fullindexprefix.id";
    if (!-e $dict_file) {
    print $outhandle "mgppbuilder::build_index - Couldn't create index $index\n";
    print STDERR "<Warning name='NoIndex'/>\n</Stage>\n" if $self->{'gli'};
    $self->{'notbuilt'}->{$index}=1;
    return;
    }

    if (!$self->{'debug'}) {
    # create the perfect hash function
    if (!-e "$mgpp_perf_hash_build_exe") {
        print STDERR "<FatalError name='NoRunMGHash'/>\n</Stage>\n" if $self->{'gli'};
        die "mgppbuilder::build_index - couldn't run $mgpp_perf_hash_build_exe\n";
    }
    system ("mgpp_perf_hash_build$exe -f \"$fullindexprefix\" $osextra");

    if (!-e "$mgpp_passes_exe" || 
        !open ($handle, "| mgpp_passes$exe -M $maxnumeric $mgpp_passes_sections -f \"$fullindexprefix\" -I2 $osextra")) {
        print STDERR "<FatalError name='NoRunMGPasses'/>\n</Stage>\n" if $self->{'gli'};
        die "mgppbuilder::build_index - couldn't run $mgpp_passes_exe\n";
    }
    }
    
    # invert the text
    print $outhandle "\n    inverting the text (mgpp_passes -I2)\n"  if ($self->{'verbosity'} >= 1);
    print STDERR "<Phase name='InvertingText'/>\n" if $self->{'gli'};
    $self->{'buildproc'}->reset();
    &plugin::read ($self->{'pluginfo'}, $self->{'source_dir'}, 
           "", {}, $self->{'buildproc'}, $self->{'maxdocs'}, 0, $self->{'gli'});

    $self->print_stats ();
    
    if (!$self->{'debug'}) {

    close ($handle);
    
    # create the weights file
    print $outhandle "\n    create the weights file\n"  if ($self->{'verbosity'} >= 1);
    print STDERR "<Phase name='CreateTheWeights'/>\n" if $self->{'gli'};
    if (!-e "$mgpp_weights_build_exe") {
        print STDERR "<FatalError name='NoRunMGWeights'/>\n</Stage>\n" if $self->{'gli'};
        die "mgppbuilder::build_index - couldn't run $mgpp_weights_build_exe\n";
    }
    system ("mgpp_weights_build$exe -f \"$fullindexprefix\" $osextra");

    # create 'on-disk' stemmed dictionary
    print $outhandle "\n    creating 'on-disk' stemmed dictionary\n"  if ($self->{'verbosity'} >= 1);
    if (!-e "$mgpp_invf_dict_exe") {
        print STDERR "<FatalError name='NoRunMGInvf'/>\n</Stage>\n" if $self->{'gli'};
        die "mgppbuilder::build_index - couldn't run $mgpp_invf_dict_exe\n";
    }
    system ("mgpp_invf_dict$exe -f \"$fullindexprefix\" $osextra" );


    # creates stem index files for the various stemming methods
    print $outhandle "\n    creating stem indexes\n"  if ($self->{'verbosity'} >= 1);
    print STDERR "<Phase name='CreatingStemIndx'/>\n" if $self->{'gli'};
    if (!-e "$mgpp_stem_idx_exe") {
        print STDERR "<FatalError name='NoRunMGStem'/>\n</Stage>\n" if $self->{'gli'};
        die "mgppbuilder::build_index - couldn't run $mgpp_stem_idx_exe\n";
    }
    my $accent_folding_enabled = 1;
    if ($self->{'accentfold'}) {
        # the first time we do this, we test for accent folding enabled
        if (system ("mgpp_stem_idx$exe -b 4096 -s4 -f \"$fullindexprefix\" $osextra") == 2) {
        # accent folding has not been enabled in mgpp
        $accent_folding_enabled = 0;
        $self->{'stemindexes'} -= 4;
        }
    }
    if ($self->{'casefold'}) {
        system ("mgpp_stem_idx$exe -b 4096 -s1 -f \"$fullindexprefix\" $osextra");
        if ($accent_folding_enabled && $self->{'accentfold'}) {
        system ("mgpp_stem_idx$exe -b 4096 -s5 -f \"$fullindexprefix\" $osextra");
        }
    }
    if ($self->{'stem'}) {
        system ("mgpp_stem_idx$exe -b 4096 -s2 -f \"$fullindexprefix\" $osextra");
        if ($accent_folding_enabled && $self->{'accentfold'}) {
        system ("mgpp_stem_idx$exe -b 4096 -s6 -f \"$fullindexprefix\" $osextra");
        }
    }
    if ($self->{'casefold'} && $self->{'stem'}) {
        system ("mgpp_stem_idx$exe -b 4096 -s3 -f \"$fullindexprefix\" $osextra");
        if ($accent_folding_enabled && $self->{'accentfold'}) {
        system ("mgpp_stem_idx$exe -b 4096 -s7 -f \"$fullindexprefix\" $osextra");
        }
    }

    # remove unwanted files
    my $tmpdir = &util::filename_cat ($self->{'build_dir'}, $indexdir);
    opendir (DIR, $tmpdir) || die
        "mgppbuilder::build_index - couldn't read directory $tmpdir\n";
    foreach my $file (readdir(DIR)) {
        next if $file =~ /^\./;
        my ($suffix) = $file =~ /\.([^\.]+)$/;
        if (defined $suffix && !defined $wanted_index_files{$suffix}) {
        # delete it!
        print $outhandle "deleting $file\n" if $self->{'verbosity'} > 2;
        #&util::rm (&util::filename_cat ($tmpdir, $file));
        }
    }
    closedir (DIR);
    }
    print STDERR "</Stage>\n" if $self->{'gli'};
}   

# now only outputs stuff if you can't generate it from collectionmeta - e.g. if someone has specified 'metadata' as an index.
sub output_collection_meta {
    my $self = shift(@_);
    my ($handle) = @_;

    # define the indexed field mapping if not already done so (ie if infodb called separately from build_index)
    if (!defined $self->{'build_cfg'}) {
    $self->read_final_field_list();
    }

    # do the collection info
    $self->output_collection_meta_start($handle);
    $self->output_collection_meta_sets($handle);

    # first do the collection meta stuff - everything without a dot
    my $collmetadefined = 0;
    my $metadata_entry;
    if (defined $self->{'collect_cfg'}->{'collectionmeta'}) {
    $collmetadefined = 1;
    }

    #add the index field macros to [collection]
    # eg <TI>Title
    #    <SU>Subject
    # these now come from collection meta. if that is not defined, usses the metadata name
    my $field_entry="";
    my $collmeta = "";
    foreach my $longfield (@{$self->{'build_cfg'}->{'indexfields'}}){
    my $shortfield = $self->{'buildproc'}->{'indexfieldmap'}->{$longfield};
    next if $shortfield eq 1;
    
    # we need to check if some coll meta has been defined - don't output 
    # any that have
    $collmeta = ".$longfield";
    if (!$collmetadefined || !defined $self->{'collect_cfg'}->{'collectionmeta'}->{$collmeta}) {
        if ($longfield eq "allfields") {
        $field_entry .= "<$shortfield>_query:textallfields_\n";
        } elsif ($longfield eq "text") {
        $field_entry .= "<$shortfield>_query:texttextonly_\n";
        } else {
        $field_entry .= "<$shortfield>$longfield\n";
        }
    }
    }
    print $handle $field_entry;
    
    # now add the level names
    my $level_entry = "";
    foreach my $level (@{$self->{'collect_cfg'}->{'levels'}}) {
    $collmeta = ".$level"; # based on the original specification
    $level =~ tr/A-Z/a-z/; # make it lower case
    my $levelid = $level_map{$level}; # find the actual value we used in the index
    if (!$collmetadefined || !defined $self->{'collect_cfg'}->{'collectionmeta'}->{$collmeta}) {
        # use the default macro
        $level_entry .= "<$levelid>" . $level_map{$levelid} . "\n";
    }
    }
    print $handle $level_entry;
    
    # now add subcoll meta
    my $subcoll_entry = "";
    my $shortname = "";
    my $one_entry = "";
    foreach my $subcoll (@{$self->{'index_mapping'}->{'subcollectionmaporder'}}) {
    $shortname = $self->{'index_mapping'}->{$subcoll};
    if (!$collmetadefined || !defined $self->{'collect_cfg'}->{'collectionmeta'}->{".$subcoll"}) {
        $subcoll_entry .= "<$shortname>$subcoll\n";
    }
    }
    print $handle $subcoll_entry;

    # now add language meta
    my $lang_entry = "";
    foreach my $lang (@{$self->{'index_mapping'}->{'languagemaporder'}}) {
    $shortname = $self->{'index_mapping'}->{$lang};
    if (!$collmetadefined || !defined $self->{'collect_cfg'}->{'collectionmeta'}->{".$lang"}) {
        $lang_entry .= "<$shortname>$lang\n";
    }
    }
    print $handle "$lang_entry\n";

    $self->output_collection_meta_end($handle);
}

# at the end of building, we have an indexfieldmap with all the mappings,
# plus some extras, and indexmap with any indexes in it that weren't
# specified in the index definition.  we want to make an ordered list of
# fields that are indexed, and a list of mappings that are used. this will
# be used for the build.cfg file, and for collection meta definition we
# store these in a build.cfg bit
sub make_final_field_list {
    my $self = shift (@_);
    
    $self->{'build_cfg'} = {};
    
    # store the indexfieldmap information
    my @indexfieldmap = ();
    my @indexfields = ();
    my $specifiedfields = {};
    my @specifiedfieldorder = ();

    # go through the index definition and add each thing to a map, so we
    # can easily check if it is already specified - when doing the
    # metadata, we print out all the individual fields, but some may
    # already be specified in the index definition, so we dont want to add
    # those again.

    my $field;
    foreach $field (@{$self->{'collect_cfg'}->{'indexes'}}) {
    # remove subcoll stuff
    my $parts = $field;
    $parts =~ s/:.*$//;
    # *************
    my @fs = split(';', $parts);
    foreach my $f(@fs) {
        if (!defined $specifiedfields->{$f}) {
        $specifiedfields->{$f}=1;
        push (@specifiedfieldorder, "$f");
        }
    }
    }
    
    #add all fields bit 
    foreach $field (@specifiedfieldorder) {
    if ($field eq "metadata") {
        foreach my $newfield (keys %{$self->{'buildproc'}->{'indexfields'}}) {
        if (!defined $specifiedfields->{$newfield}) {
            push (@indexfieldmap, "$newfield\-\>$self->{'buildproc'}->{'indexfieldmap'}->{$newfield}");
            push (@indexfields, "$newfield");
        }
        }

    } elsif ($field eq 'text') {
        push (@indexfieldmap, "text\-\>TX");
        push (@indexfields, "text");
    } elsif ($field eq 'allfields') {
        push (@indexfieldmap, "allfields\-\>ZZ");
        push (@indexfields, "allfields");
    } else {

        my $ifm = $self->{'buildproc'}->{'indexfieldmap'};

        if (defined $ifm->{$field}) {
        push (@indexfieldmap, "$field\-\>$ifm->{$field}");
        push (@indexfields, "$field");
        }

        
    }
    }

    $self->{'build_cfg'}->{'indexfieldmap'} = \@indexfieldmap;
    $self->{'build_cfg'}->{'indexfields'} = \@indexfields;
    
}


# recreate the field list from the build.cfg file, look first in building,
# then in index to find it. if there is no build.cfg, we can't do the field
# list (there is unlikely to be any index anyway.)
sub read_final_field_list {
    my $self = shift (@_);
    $self->{'build_cfg'} = {};
    my @indexfieldmap = ();
    my @indexfields = ();
    my @indexmap = ();

    if (scalar(keys %{$self->{'buildproc'}->{'indexfieldmap'}}) == 0) {
    # set the default mapping
    $self->{'buildproc'}->set_indexfieldmap ($self->{'indexfieldmap'});
    }
    # we read the stuff in from the build.cfg file - if its there
    my $buildconfigfile = &util::filename_cat($self->{'build_dir'}, "build.cfg");
    
    if (!-e $buildconfigfile) {
    # try the index dir - but do we know where it is?? try here
    $buildconfigfile  = &util::filename_cat($ENV{'GSDLCOLLECTDIR'}, "index", "build.cfg");
    if (!-e $buildconfigfile) {
        #we cant find a config file - just ignore the field list
        return;
    }
    } 

    my $buildcfg = &colcfg::read_build_cfg( $buildconfigfile);
    my $field;
    if (defined $buildcfg->{'indexfields'}) {
    foreach $field (@{$buildcfg->{'indexfields'}}) {
        push (@indexfields, "$field");
    }
    }

    if (defined $buildcfg->{'indexfieldmap'}) {
    foreach $field (@{$buildcfg->{'indexfieldmap'}}) {
        push (@indexfieldmap, "$field");
        my ($f, $v) = $field =~ /^(.*)\-\>(.*)$/;
        $self->{'buildproc'}->{'indexfieldmap'}->{$f} = $v;
    }
    }       

    if (defined $buildcfg->{'indexmap'}) {
    foreach $field (@{$buildcfg->{'indexmap'}}) {
        push (@indexmap, "$field");
    }
    }       

    $self->{'build_cfg'}->{'indexfieldmap'} = \@indexfieldmap;
    $self->{'build_cfg'}->{'indexfields'} = \@indexfields;
    $self->{'build_cfg'}->{'indexmap'} = \@indexmap;
}


sub build_cfg_extra {
    my $self = shift (@_);
    my ($build_cfg) = @_;

    $build_cfg->{'numsections'} = $self->{'buildproc'}->get_num_sections();
    
    # store the level info
    my @indexlevels = ();
    my @levelmap = ();
    foreach my $l (@{$self->{'levelorder'}}) {
    push (@indexlevels, $level_map{$l});
    push (@levelmap, "$l\-\>$level_map{$l}");
    }
    $build_cfg->{'indexlevels'} = \@indexlevels;
    $build_cfg->{'levelmap'} = \@levelmap;

    # text level (and database level) is always section
    $build_cfg->{'textlevel'} = $level_map{'section'};
   
}

1;