[8518] | 1 | ###########################################################################
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| 2 | #
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| 3 | # expinfo.pm --
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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 | # modified by: Chi-Yu Huang
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| 27 | # This module stores information about the export directory. At the moment
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| 28 | # this information just consists of the file name (relative to the
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| 29 | # directory the export information file is in) and its OID.
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| 30 |
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| 31 | # This module assumes there is a one to one correspondance between
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| 32 | # a file in the export directory and an OID.
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| 33 |
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| 34 | package expinfo;
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| 35 |
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[15894] | 36 |
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| 37 | use strict;
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| 38 |
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| 39 |
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[8518] | 40 | sub new {
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| 41 | my ($class) = @_;
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| 42 | my $self = {'info'=>{},
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| 43 | 'order'=>[]};
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| 44 |
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| 45 | return bless $self, $class;
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| 46 | }
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| 47 |
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| 48 | sub load_info {
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| 49 | my $self = shift (@_);
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| 50 | my ($filename) = @_;
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| 51 |
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| 52 | $self->{'info'} = {};
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| 53 |
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| 54 | if (-e $filename) {
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| 55 | open (INFILE, $filename) ||
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| 56 | die "expinfo::load_info couldn't read $filename\n";
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| 57 |
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| 58 | my ($line, @line);
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| 59 | while (defined ($line = <INFILE>)) {
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| 60 | $line =~ s/\cM|\cJ//g; # remove end-of-line characters
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| 61 | @line = split ("\t", $line); # filename,
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| 62 | if (scalar(@line) >= 2) {
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| 63 | $self->add_info (@line);
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| 64 | }
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| 65 | }
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| 66 | close (INFILE);
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| 67 | }
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| 68 | }
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| 69 |
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| 70 | sub save_info {
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| 71 | my $self = shift (@_);
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| 72 | my ($filename) = @_;
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| 73 |
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| 74 | my ($OID, $info);
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| 75 |
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| 76 | open (OUTFILE, ">$filename") ||
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| 77 | die "expinfo::save_info couldn't write $filename\n";
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| 78 |
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| 79 | foreach $info (@{$self->get_OID_list()}) {
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| 80 | if (defined $info) {
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| 81 | print OUTFILE join("\t", @$info), "\n";
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| 82 | }
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| 83 | }
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| 84 | close (OUTFILE);
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| 85 | }
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| 86 |
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| 87 | sub delete_info {
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| 88 | my $self = shift (@_);
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| 89 | my ($OID) = @_;
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| 90 |
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| 91 | if (defined $self->{'info'}->{$OID}) {
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| 92 | delete $self->{'info'}->{$OID};
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| 93 |
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| 94 | my $i = 0;
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| 95 | while ($i < scalar (@{$self->{'order'}})) {
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| 96 | if ($self->{'order'}->[$i]->[0] eq $OID) {
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| 97 | splice (@{$self->{'order'}}, $i, 1);
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| 98 | last;
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| 99 | }
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| 100 | $i ++;
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| 101 | }
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| 102 | }
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| 103 | }
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| 104 |
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| 105 | sub add_info {
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| 106 | my $self = shift (@_);
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| 107 | my ($OID, $doc_file, $sortmeta) = @_;
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| 108 | $sortmeta = "" unless defined $sortmeta;
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| 109 |
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| 110 | if (! defined($OID)) {
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| 111 | # only happens when no files can be processed?
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| 112 | return undef;
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| 113 | }
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| 114 | $self->delete_info ($OID);
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| 115 | $self->{'info'}->{$OID} = [$doc_file];
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| 116 | push (@{$self->{'order'}}, [$OID, $sortmeta]);
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| 117 | }
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| 118 |
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| 119 | # returns a list of the form [[OID, doc_file], ...]
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| 120 | sub get_OID_list {
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| 121 | my $self = shift (@_);
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| 122 |
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| 123 | my ($OID);
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| 124 | my @list = ();
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| 125 |
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| 126 | foreach $OID (sort {$a->[1] cmp $b->[1]} @{$self->{'order'}}) {
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| 127 | push (@list, [$OID->[0], $self->{'info'}->{$OID->[0]}->[0]]);
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| 128 | }
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| 129 | return \@list;
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| 130 | }
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| 131 |
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| 132 | # returns a list of the form [[doc_file, OID], ...]
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| 133 | sub get_file_list {
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| 134 | my $self = shift (@_);
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| 135 |
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| 136 | my ($OID);
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| 137 | my @list = ();
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| 138 |
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| 139 | foreach $OID (sort {$a->[1] cmp $b->[1]} @{$self->{'order'}}) {
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| 140 | push (@list, [$self->{'info'}->{$OID->[0]}->[0], $OID->[0]]);
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| 141 | }
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| 142 | return \@list;
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| 143 | }
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| 144 |
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| 145 |
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| 146 | # returns a list of the form [doc_file]
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| 147 | sub get_info {
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| 148 | my $self = shift (@_);
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| 149 | my ($OID) = @_;
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| 150 |
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| 151 | if (defined $self->{'info'}->{$OID}) {
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| 152 | return $self->{'info'}->{$OID};
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| 153 | }
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| 154 |
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| 155 | return undef;
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| 156 | }
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| 157 |
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| 158 |
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| 159 | # returns the number of documents so far
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| 160 | sub size {
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| 161 | my $self = shift (@_);
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| 162 | return (scalar(@{$self->{'order'}}));
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| 163 | }
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| 164 |
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| 165 | 1;
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| 166 |
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