| 1 | ###########################################################################
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| 2 | #
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| 3 | # inexport.pm -- useful utilities to support import.pl and export.pl
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| 4 | # A component of the Greenstone digital library software
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| 5 | # from the New Zealand Digital Library Project at the
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| 6 | # University of Waikato, New Zealand.
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| 7 | #
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| 8 | # Copyright (C) 1999 New Zealand Digital Library Project
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| 9 | #
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| 10 | # This program is free software; you can redistribute it and/or modify
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| 11 | # it under the terms of the GNU General Public License as published by
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| 12 | # the Free Software Foundation; either version 2 of the License, or
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| 13 | # (at your option) any later version.
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| 14 | #
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| 15 | # This program is distributed in the hope that it will be useful,
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| 16 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | # GNU General Public License for more details.
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| 19 | #
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| 20 | # You should have received a copy of the GNU General Public License
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| 21 | # along with this program; if not, write to the Free Software
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| 22 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 23 | #
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| 24 | ###########################################################################
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| 25 |
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| 26 | package inexport;
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| 27 |
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| 28 | use strict;
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| 29 |
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| 30 | use File::Basename;
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| 31 |
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| 32 | use util;
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| 33 | use GDBMUtils;
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| 34 |
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| 35 | sub new_vs_old_import_diff
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| 36 | {
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| 37 | my ($archive_info,$block_hash,$importdir) = @_;
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| 38 |
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| 39 | # First convert all files to absolute form
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| 40 | # This is to support the situation where the import folder is not
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| 41 | # the default
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| 42 |
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| 43 | my $prev_all_files = $archive_info->{'prev_import_filelist'};
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| 44 | my $full_prev_all_files = {};
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| 45 |
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| 46 | foreach my $prev_file (keys %$prev_all_files) {
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| 47 |
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| 48 | if (!&util::filename_is_absolute($prev_file)) {
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| 49 | my $full_prev_file = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},$prev_file);
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| 50 | $full_prev_all_files->{$full_prev_file} = $prev_file;
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| 51 | }
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| 52 | else {
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| 53 | $full_prev_all_files->{$prev_file} = $prev_file;
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| 54 | }
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| 55 | }
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| 56 |
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| 57 |
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| 58 | # Figure out which are the new files, existing files and so
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| 59 | # by implication the files from the previous import that are not
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| 60 | # there any more => mark them for deletion
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| 61 | foreach my $curr_file (keys %{$block_hash->{'all_files'}}) {
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| 62 |
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| 63 | my $full_curr_file = $curr_file;
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| 64 |
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| 65 | # entry in 'all_files' is moved to either 'existing_files',
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| 66 | # 'deleted_files', or 'new_files'
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| 67 |
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| 68 | if (!&util::filename_is_absolute($curr_file)) {
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| 69 | # add in import dir to make absolute
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| 70 | $full_curr_file = &util::filename_cat($importdir,$curr_file);
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| 71 | }
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| 72 |
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| 73 | if (defined $block_hash->{'file_blocks'}->{$full_curr_file}) {
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| 74 | # If in block list, we want to ignore it
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| 75 | delete $block_hash->{'all_files'}->{$curr_file};
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| 76 |
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| 77 | if (defined $full_prev_all_files->{$full_curr_file}) {
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| 78 | # also make sure it is gone from 'previous' list so
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| 79 | # not mistaken for a file that needs to be deleted
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| 80 | delete $full_prev_all_files->{$full_curr_file};
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| 81 | }
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| 82 | next;
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| 83 | }
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| 84 |
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| 85 | # figure of if new file or not
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| 86 | if (defined $full_prev_all_files->{$full_curr_file}) {
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| 87 |
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| 88 | # had it before
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| 89 | $block_hash->{'existing_files'}->{$full_curr_file} = 1;
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| 90 |
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| 91 | # Now remove it, so by end of loop only the files
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| 92 | # that need deleting are left
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| 93 |
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| 94 | delete $full_prev_all_files->{$full_curr_file};
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| 95 | }
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| 96 | else {
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| 97 | $block_hash->{'new_files'}->{$full_curr_file} = 1;
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| 98 | }
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| 99 |
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| 100 | delete $block_hash->{'all_files'}->{$curr_file};
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| 101 | }
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| 102 |
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| 103 | # By this point full_prev_all_files contains the files
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| 104 | # mentioned in archiveinf-src.db but are not in the 'import'
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| 105 | # folder (or whatever was specified through -importdir ...)
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| 106 |
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| 107 | # This list can contain files that were created in the 'tmp' or
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| 108 | # 'cache' areas (such as screen-size and thumbnail images).
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| 109 | #
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| 110 | # In building the final list of files to delete, we test to see if
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| 111 | # it exists on the filesystem and if it does (unusual for a file
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| 112 | # that's allegedly deleted!) , supress it from going into the final
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| 113 | # list
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| 114 |
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| 115 | my $collectdir = $ENV{'GSDLCOLLECTDIR'};
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| 116 |
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| 117 | my @deleted_files = values %$full_prev_all_files;
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| 118 | map { my $curr_file = $_;
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| 119 | my $full_curr_file = $curr_file;
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| 120 |
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| 121 | if (!&util::filename_is_absolute($curr_file)) {
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| 122 | # add in import dir to make absolute
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| 123 |
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| 124 | $full_curr_file = &util::filename_cat($collectdir,$curr_file);
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| 125 | }
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| 126 |
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| 127 |
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| 128 | if (!-e $full_curr_file) {
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| 129 | $block_hash->{'deleted_files'}->{$curr_file} = 1;
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| 130 | }
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| 131 | } @deleted_files;
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| 132 | }
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| 133 |
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| 134 | sub mark_docs_for_deletion
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| 135 | {
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| 136 | my ($archive_info,$deleted_files_ref,$archivedir,$verbosity) = @_;
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| 137 |
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| 138 | my $db_ext = &util::is_little_endian() ? ".ldb" : ".bdb";
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| 139 | my $doc_db = "archiveinf-doc$db_ext";
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| 140 | my $src_db = "archiveinf-src$db_ext";
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| 141 | my $arcinfo_doc_filename = &util::filename_cat ($archivedir, $doc_db);
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| 142 | my $arcinfo_src_filename = &util::filename_cat ($archivedir, $src_db);
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| 143 |
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| 144 |
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| 145 | # record files marked for deletion in arcinfo
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| 146 | foreach my $file (@$deleted_files_ref) {
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| 147 | # use 'archiveinf-src' GDBM file to look up all the OIDs
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| 148 | # this file is used in (note in most cases, it's just one OID)
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| 149 |
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| 150 | my $src_rec = GDBMUtils::gdbmRecordToHash($arcinfo_src_filename,$file);
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| 151 | my $oids = $src_rec->{'oid'};
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| 152 | foreach my $oid (@$oids) {
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| 153 |
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| 154 | # Find out if it's an assoc file or main doc
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| 155 |
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| 156 | my $doc_rec = GDBMUtils::gdbmRecordToHash($arcinfo_doc_filename,$oid);
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| 157 | if ($doc_rec->{'src-file'}->[0] eq $file) {
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| 158 | # It's the main doc
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| 159 | # => mark it for deletion
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| 160 |
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| 161 | if ($verbosity>1) {
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| 162 | print STDERR "$oid marked to be deleted from index on next buildcol.pl\n";
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| 163 | }
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| 164 | $archive_info->set_status_info($oid,"D");
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| 165 |
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| 166 | my $val = &GDBMUtils::gdbmDatabaseGet($arcinfo_doc_filename,$oid);
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| 167 | my ($index_status) = ($val =~ m/^<index-status>(.*)$/m);
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| 168 | if ($index_status ne "D") {
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| 169 | $val =~ s/^<index-status>(.*)$/<index-status>D/m;
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| 170 | &GDBMUtils::gdbmDatabaseSet($arcinfo_doc_filename,$oid,$val);
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| 171 | my $doc_file = $doc_rec->{'doc-file'}->[0];
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| 172 |
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| 173 | my $doc_filename = &util::filename_cat($archivedir,$doc_file);
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| 174 |
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| 175 |
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| 176 | my ($doc_tailname, $doc_dirname, $suffix)
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| 177 | = File::Basename::fileparse($doc_filename, "\\.[^\\.]+\$");
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| 178 |
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| 179 | print STDERR "Removing $doc_dirname\n" if ($verbosity>2);
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| 180 |
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| 181 | &util::rm_r($doc_dirname);
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| 182 |
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| 183 | }
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| 184 | }
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| 185 | else {
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| 186 | # assoc file => mark it for re-indexing (safest thing to do)
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| 187 | my $curr_status = $archive_info->get_status_info($oid);
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| 188 |
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| 189 |
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| 190 | if (defined($curr_status) && (($curr_status ne "D") && ($curr_status ne "R"))) {
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| 191 | if ($verbosity > 1) {
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| 192 | print STDERR "$oid marked for (potential) reindexing\n";
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| 193 | print STDERR " (because associated file $file deleted)\n";
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| 194 | }
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| 195 | $archive_info->set_status_info($oid,"R");
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| 196 |
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| 197 | my $val = &GDBMUtils::gdbmDatabaseGet($arcinfo_doc_filename,$oid);
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| 198 | $val =~ s/^<index-status>(.*)$/<index-status>R/m;
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| 199 | &GDBMUtils::gdbmDatabaseSet($arcinfo_doc_filename,$oid,$val);
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| 200 | }
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| 201 | }
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| 202 |
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| 203 | GDBMUtils::gdbmDatabaseRemove($arcinfo_src_filename,$file);
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| 204 | }
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| 205 | }
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| 206 | }
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| 207 |
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| 208 |
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| 209 |
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| 210 | sub mark_docs_for_reindex
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| 211 | {
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| 212 | my ($archive_info,$existing_files_ref,$archivedir,$verbosity) = @_;
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| 213 |
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| 214 | # Reindexing is accomplished by deleting the previously indexed
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| 215 | # version of the document, and then allowing the new version to
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| 216 | # be indexed (as would a new document be indexed).
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| 217 | #
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| 218 | # The first step (marking for deletion) is implemented by this routine.
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| 219 | #
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| 220 | # By default in Greenstone a new version of an index will hash to
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| 221 | # a new unique OID, and the above strategy of reindex=delete+add
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| 222 | # works fine. A special case arises when a persistent OID is
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| 223 | # allocated to a document (for instance through a metadata field),
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| 224 | # and the second step to reindexing (see XXXX) detects this and
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| 225 | # deals with it appropriately.
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| 226 |
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| 227 | my $db_ext = &util::is_little_endian() ? ".ldb" : ".bdb";
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| 228 | my $doc_db = "archiveinf-doc$db_ext";
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| 229 | my $arcinfo_doc_filename = &util::filename_cat ($archivedir, $doc_db);
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| 230 |
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| 231 |
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| 232 | my $archiveinf_timestamp = -M $arcinfo_doc_filename;
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| 233 |
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| 234 | my $reindex_files_ref = [];
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| 235 |
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| 236 | foreach my $existing_filename (@$existing_files_ref) {
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| 237 |
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| 238 | if (-M $existing_filename < $archiveinf_timestamp) {
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| 239 | # file is newer than last build
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| 240 |
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| 241 | my $existing_file = $existing_filename;
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| 242 | my $collectdir = &util::filename_cat($ENV{'GSDLCOLLECTDIR'});
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| 243 |
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| 244 | $existing_file =~ s/^$collectdir(\\|\/)?//;
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| 245 |
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| 246 | print STDERR "**** Deleting existing file: $existing_file\n";
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| 247 |
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| 248 | push(@$reindex_files_ref,$existing_file);
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| 249 | }
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| 250 |
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| 251 | }
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| 252 |
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| 253 | mark_docs_for_deletion($archive_info,$reindex_files_ref,$archivedir,$verbosity);
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| 254 |
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| 255 | return @$reindex_files_ref;
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| 256 | }
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| 257 |
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| 258 |
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| 259 |
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| 260 | 1;
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