1 | ###########################################################################
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2 | #
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3 | # extrametautil.pm -- various useful utilities
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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 extrametautil;
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27 |
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28 | use strict;
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29 |
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30 | use util;
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31 | #use Encode;
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32 | #use File::Copy;
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33 | use File::Basename;
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34 |
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35 |
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36 | # extrametakeys - an array that contains all the filenames for which we have
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37 | # some added metadata
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38 | #---------------------------------
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39 | sub addmetakey {
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40 | my ($extrametakeys, $filename_re_for_metadata) = @_;
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41 | push(@$extrametakeys, $filename_re_for_metadata);
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42 | }
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43 |
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44 | # extrametafiles - a hash on filenames (the files to which metadata will be
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45 | # associated), containing a hash of file->fullfilename for all the metadata
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46 | # files that metadata was obtained from
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47 | #-------------------------------------------
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48 |
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49 | sub addmetafile {
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50 | my ($extrametafile, $filename_re_for_metadata, $file, $filename_full_path) = @_;
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51 | if (!defined $extrametafile->{$filename_re_for_metadata}) {
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52 | $extrametafile->{$filename_re_for_metadata} = {};
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53 | }
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54 | $extrametafile->{$filename_re_for_metadata}->{$file} = $filename_full_path;
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55 | }
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56 |
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57 | # was called setmetafile
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58 | sub setmetafilehash {
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59 | my ($extrametafile, $filename_re_for_metadata, $file_hash) = @_;
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60 | $extrametafile->{$filename_re_for_metadata} = $file_hash;
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61 | }
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62 |
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63 | # was called getmetafile
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64 | sub getmetafilehash {
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65 | my ($extrametafile, $filename_re_for_metadata) = @_;
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66 | return $extrametafile->{$filename_re_for_metadata};
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67 | }
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68 |
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69 | # extrametadata - a hash on filenames (the files to which metadata will be
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70 | # associated), containing a hash of name->[value array] pairs of metadata
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71 | #----------------------------------------
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72 |
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73 | # set the metadata hash for a particular file
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74 | sub setmetadata {
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75 | my ($extrametadata, $filename_re_for_metadata, $meta_hash) = @_;
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76 | $extrametadata->{$filename_re_for_metadata} = $meta_hash;
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77 | }
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78 |
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79 | # gets the metadata hash for a particular file
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80 | sub getmetadata {
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81 | my ($extrametadata, $filename_re_for_metadata) = @_;
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82 | return $extrametadata->{$filename_re_for_metadata};
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83 | }
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84 |
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85 | # add a single value to a specific metadata field
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86 | sub addmetadatum {
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87 | my ($extrametadata, $filename_re_for_metadata, $field_name, $value) = @_;
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88 | if (!defined $extrametadata->{$filename_re_for_metadata}->{$field_name}) {
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89 | $extrametadata->{$filename_re_for_metadata}->{$field_name} = [];
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90 | }
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91 | my $metaname_vals = $extrametadata->{$filename_re_for_metadata}->{$field_name};
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92 | push(@$metaname_vals, $value);
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93 | }
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94 |
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95 | # get a specific value for a particular metadata field
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96 | # e.g. $extrametadata->{$filename_re_for_metadata}->{"dc.Identifier"}->[0]
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97 | sub getmetadatum_by_index {
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98 | my ($extrametadata, $filename_re_for_metadata, $metaname, $index) = @_;
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99 | return $extrametadata->{$filename_re_for_metadata}->{$metaname}->[$index];
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100 | }
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101 |
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102 |
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103 |
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104 | 1;
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