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 |
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36 | sub prime_doc_oid_count
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37 | {
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38 | my ($archivedir) = @_;
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39 | my $oid_count_filename = &util::filename_cat ($archivedir, "OIDcount");
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40 |
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41 | if (-e $oid_count_filename) {
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42 | if (open(OIDIN,"<$oid_count_filename")) {
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43 | my $OIDcount = <OIDIN>;
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44 | chomp $OIDcount;
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45 | close(OIDIN);
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46 |
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47 | $doc::OIDcount = $OIDcount;
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48 | }
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49 | else {
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50 |
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51 | print STDERR "Warning: unable to read document OID count from $oid_count_filename\n";
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52 | print STDERR "Setting value to 0\n";
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53 | }
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54 | }
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55 |
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56 | }
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57 |
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58 | sub store_doc_oid_count
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59 | {
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60 | # Use the file "OIDcount" in the archives directory to record
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61 | # what value doc.pm got up to
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62 |
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63 | my ($archivedir) = @_;
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64 | my $oid_count_filename = &util::filename_cat ($archivedir, "OIDcount");
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65 |
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66 |
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67 | if (open(OIDOUT,">$oid_count_filename")) {
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68 | print OIDOUT $doc::OIDcount, "\n";
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69 |
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70 | close(OIDOUT);
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71 | }
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72 | else {
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73 | print STDERR "Warning: unable to store document OID count\n";
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74 | }
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75 | }
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76 |
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77 |
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78 |
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79 | sub new_vs_old_import_diff
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80 | {
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81 | my ($archive_info,$block_hash,$importdir) = @_;
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82 |
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83 | # First convert all files to absolute form
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84 | # This is to support the situation where the import folder is not
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85 | # the default
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86 |
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87 | my $prev_all_files = $archive_info->{'prev_import_filelist'};
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88 | my $full_prev_all_files = {};
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89 |
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90 | foreach my $prev_file (keys %$prev_all_files) {
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91 |
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92 | if (!&util::filename_is_absolute($prev_file)) {
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93 | my $full_prev_file = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},$prev_file);
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94 | $full_prev_all_files->{$full_prev_file} = $prev_file;
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95 | }
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96 | else {
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97 | $full_prev_all_files->{$prev_file} = $prev_file;
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98 | }
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99 | }
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100 |
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101 |
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102 | # Figure out which are the new files, existing files and so
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103 | # by implication the files from the previous import that are not
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104 | # there any more => mark them for deletion
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105 | foreach my $curr_file (keys %{$block_hash->{'all_files'}}) {
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106 |
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107 | my $full_curr_file = $curr_file;
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108 |
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109 | # entry in 'all_files' is moved to either 'existing_files',
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110 | # 'deleted_files', or 'new_files'
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111 |
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112 | if (!&util::filename_is_absolute($curr_file)) {
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113 | # add in import dir to make absolute
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114 | $full_curr_file = &util::filename_cat($importdir,$curr_file);
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115 | }
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116 |
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117 | if (defined $block_hash->{'file_blocks'}->{$full_curr_file}) {
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118 | # If in block list, we want to ignore it
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119 | delete $block_hash->{'all_files'}->{$curr_file};
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120 |
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121 | if (defined $full_prev_all_files->{$full_curr_file}) {
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122 | # also make sure it is gone from 'previous' list so
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123 | # not mistaken for a file that needs to be deleted
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124 | delete $full_prev_all_files->{$full_curr_file};
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125 | }
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126 | next;
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127 | }
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128 |
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129 | # figure out if new file or not
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130 | if (defined $full_prev_all_files->{$full_curr_file}) {
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131 |
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132 | # had it before
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133 | $block_hash->{'existing_files'}->{$full_curr_file} = 1;
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134 |
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135 | # Now remove it, so by end of loop only the files
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136 | # that need deleting are left
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137 |
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138 | delete $full_prev_all_files->{$full_curr_file};
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139 | }
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140 | else {
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141 | $block_hash->{'new_files'}->{$full_curr_file} = 1;
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142 | }
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143 |
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144 | delete $block_hash->{'all_files'}->{$curr_file};
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145 | }
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146 |
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147 | # By this point full_prev_all_files contains the files
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148 | # mentioned in archiveinf-src.db but are not in the 'import'
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149 | # folder (or whatever was specified through -importdir ...)
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150 |
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151 | # This list can contain files that were created in the 'tmp' or
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152 | # 'cache' areas (such as screen-size and thumbnail images).
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153 | #
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154 | # In building the final list of files to delete, we test to see if
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155 | # it exists on the filesystem and if it does (unusual for a file
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156 | # that's allegedly deleted!), supress it from going into the final
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157 | # list
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158 |
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159 | my $collectdir = $ENV{'GSDLCOLLECTDIR'};
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160 |
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161 | my @deleted_files = values %$full_prev_all_files;
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162 | map { my $curr_file = $_;
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163 | my $full_curr_file = $curr_file;
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164 |
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165 | if (!&util::filename_is_absolute($curr_file)) {
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166 | # add in import dir to make absolute
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167 |
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168 | $full_curr_file = &util::filename_cat($collectdir,$curr_file);
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169 | }
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170 |
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171 |
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172 | if (!-e $full_curr_file) {
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173 | $block_hash->{'deleted_files'}->{$curr_file} = 1;
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174 | }
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175 | } @deleted_files;
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176 | }
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177 |
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178 |
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179 | sub is_assoc_file
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180 | {
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181 | my ($file,$doc_rec) = @_;
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182 |
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183 | my ($file_root,$dirname,$suffix) = fileparse($file, "\\.[^\\.]+\$");
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184 |
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185 | foreach my $af (@{$doc_rec->{'assoc-file'}}) {
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186 | my $full_af = &util::filename_cat($dirname,$af);
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187 |
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188 | return 1 if ($full_af eq $file);
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189 | }
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190 |
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191 | return 0;
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192 | }
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193 |
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194 |
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195 | sub _mark_docs_for_deletion
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196 | {
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197 | my ($archive_info,$block_hash,$deleted_files,$archivedir,$verbosity,$mode_text) = @_;
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198 |
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199 | my $doc_db = "archiveinf-doc.gdb";
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200 | my $src_db = "archiveinf-src.gdb";
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201 | my $arcinfo_doc_filename = &util::filename_cat ($archivedir, $doc_db);
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202 | my $arcinfo_src_filename = &util::filename_cat ($archivedir, $src_db);
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203 |
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204 |
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205 | # record files marked for deletion in arcinfo
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206 | foreach my $file (@$deleted_files) {
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207 | # use 'archiveinf-src' GDBM file to look up all the OIDs
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208 | # that this file is used in (note in most cases, it's just one OID)
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209 |
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210 | my $src_rec = GDBMUtils::gdbmRecordToHash($arcinfo_src_filename,$file);
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211 | my $oids = $src_rec->{'oid'};
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212 | foreach my $oid (@$oids) {
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213 |
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214 | # Find out if it's a main doc, assoc file, or metadata
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215 |
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216 | my $doc_rec = GDBMUtils::gdbmRecordToHash($arcinfo_doc_filename,$oid);
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217 |
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218 | if (is_assoc_file($file,$doc_rec)) {
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219 | # assoc file => mark it for re-indexing (safest thing to do)
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220 | my $curr_status = $archive_info->get_status_info($oid);
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221 |
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222 |
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223 | if (defined($curr_status) && (($curr_status ne "D") && ($curr_status ne "R"))) {
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224 | if ($verbosity > 1) {
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225 | print STDERR "$oid marked for (potential) reindexing\n";
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226 | print STDERR " (because associated file $file deleted)\n";
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227 | }
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228 | $archive_info->set_status_info($oid,"R");
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229 |
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230 | my $val = &GDBMUtils::gdbmDatabaseGet($arcinfo_doc_filename,$oid);
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231 | $val =~ s/^<index-status>(.*)$/<index-status>R/m;
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232 | &GDBMUtils::gdbmDatabaseSet($arcinfo_doc_filename,$oid,$val);
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233 | }
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234 | GDBMUtils::gdbmDatabaseRemove($arcinfo_src_filename,$file);
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235 | }
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236 | else {
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237 | # either src-file or metadata.xml file linking to src-file
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238 |
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239 | my $src_file;
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240 |
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241 | if ($doc_rec->{'src-file'}->[0] ne $file) {
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242 | # it's a metadata file attached to this OID
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243 | # => workout the src-file it matches to
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244 |
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245 | $src_file = $doc_rec->{'src-file'}->[0];
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246 |
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247 | my $src_filename = $src_file;
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248 | if (!&util::filename_is_absolute($src_file)) {
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249 | $src_filename = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},$src_file);
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250 | }
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251 |
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252 | $block_hash->{'reindex_files'}->{$src_filename} = 1;
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253 |
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254 | # remove the metadata file from the src-database
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255 | GDBMUtils::gdbmDatabaseRemove($arcinfo_src_filename,$file);
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256 | }
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257 | else {
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258 | # It's the main doc
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259 | # => make it the target and mark it for deletion
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260 | $src_file = $file;
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261 | }
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262 |
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263 | # Whether the main file directly or indirectly, mark for deletion/reindex
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264 |
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265 | my $val = &GDBMUtils::gdbmDatabaseGet($arcinfo_doc_filename,$oid);
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266 | my ($index_status) = ($val =~ m/^<index-status>(.*)$/m);
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267 |
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268 |
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269 | if ($index_status ne "D") {
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270 | if ($verbosity>1) {
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271 | print STDERR "$oid ($src_file) marked to be $mode_text on next buildcol.pl\n";
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272 | }
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273 | $archive_info->set_status_info($oid,"D");
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274 |
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275 | $val =~ s/^<index-status>(.*)$/<index-status>D/m;
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276 | &GDBMUtils::gdbmDatabaseSet($arcinfo_doc_filename,$oid,$val);
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277 |
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278 | GDBMUtils::gdbmDatabaseRemove($arcinfo_src_filename,$src_file);
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279 | }
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280 |
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281 |
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282 | }
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283 |
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284 | }
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285 | }
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286 | }
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287 |
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288 |
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289 | sub mark_docs_for_deletion
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290 | {
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291 | _mark_docs_for_deletion(@_,"deleted from index");
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292 | }
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293 |
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294 |
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295 | sub mark_docs_for_reindex
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296 | {
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297 | my ($archive_info,$block_hash,$archivedir,$verbosity) = @_;
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298 |
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299 | # Reindexing is accomplished by deleting the previously indexed
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300 | # version of the document, and then allowing the new version to
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301 | # be indexed (as would a new document be indexed).
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302 | #
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303 | # The first step (marking for deletion) is implemented by this routine.
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304 | #
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305 | # By default in Greenstone a new version of an index will hash to
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306 | # a new unique OID, and the above strategy of reindex=delete+add
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307 | # works fine. A special case arises when a persistent OID is
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308 | # allocated to a document (for instance through a metadata field),
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309 | # and the second step to reindexing (see XXXX) detects this and
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310 | # deals with it appropriately.
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311 |
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312 | my @existing_files = sort keys %{$block_hash->{'existing_files'}};
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313 |
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314 | my $doc_db = "archiveinf-doc.gdb";
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315 | my $arcinfo_doc_filename = &util::filename_cat ($archivedir, $doc_db);
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316 |
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317 | my $archiveinf_timestamp = -M $arcinfo_doc_filename;
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318 |
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319 | my $reindex_files = [];
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320 |
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321 | foreach my $existing_filename (@existing_files) {
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322 |
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323 | if (-M $existing_filename < $archiveinf_timestamp) {
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324 | # file is newer than last build
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325 |
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326 | my $existing_file = $existing_filename;
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327 | my $collectdir = &util::filename_cat($ENV{'GSDLCOLLECTDIR'});
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328 |
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329 | my $collectdir_resafe = &util::filename_to_regex($collectdir);
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330 | $existing_file =~ s/^$collectdir_resafe(\\|\/)?//;
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331 |
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332 | ### print STDERR "**** Deleting existing file: $existing_file\n";
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333 |
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334 | push(@$reindex_files,$existing_file);
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335 | $block_hash->{'reindex_files'}->{$existing_filename} = 1;
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336 | }
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337 |
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338 | }
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339 |
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340 | _mark_docs_for_deletion($archive_info,$block_hash,$reindex_files,$archivedir,$verbosity, "reindex");
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341 |
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342 | }
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343 |
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344 |
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345 |
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346 | 1;
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