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 src_db_file {
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36 | my ($archivedir) = @_;
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37 | return &util::filename_cat ($archivedir, "archiveinf-src.gdb");
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38 | }
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39 |
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40 | sub doc_db_file {
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41 | my ($archivedir) = @_;
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42 | return &util::filename_cat ($archivedir, "archiveinf-doc.gdb");
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43 | }
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44 |
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45 | sub oid_count_file {
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46 | my ($archivedir) = @_;
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47 | return &util::filename_cat ($archivedir, "OIDcount");
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48 | }
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49 |
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50 |
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51 | sub prime_doc_oid_count
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52 | {
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53 | my ($archivedir) = @_;
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54 | my $oid_count_filename = &oid_count_file($archivedir);
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55 |
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56 | if (-e $oid_count_filename) {
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57 | if (open(OIDIN,"<$oid_count_filename")) {
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58 | my $OIDcount = <OIDIN>;
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59 | chomp $OIDcount;
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60 | close(OIDIN);
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61 |
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62 | $doc::OIDcount = $OIDcount;
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63 | }
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64 | else {
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65 |
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66 | print STDERR "Warning: unable to read document OID count from $oid_count_filename\n";
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67 | print STDERR "Setting value to 0\n";
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68 | }
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69 | }
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70 |
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71 | }
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72 |
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73 | sub store_doc_oid_count
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74 | {
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75 | # Use the file "OIDcount" in the archives directory to record
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76 | # what value doc.pm got up to
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77 |
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78 | my ($archivedir) = @_;
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79 | my $oid_count_filename = &oid_count_file($archivedir);
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80 |
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81 |
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82 | if (open(OIDOUT,">$oid_count_filename")) {
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83 | print OIDOUT $doc::OIDcount, "\n";
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84 |
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85 | close(OIDOUT);
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86 | }
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87 | else {
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88 | print STDERR "Warning: unable to store document OID count\n";
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89 | }
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90 | }
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91 |
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92 |
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93 |
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94 | sub new_vs_old_import_diff
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95 | {
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96 | my ($archive_info,$block_hash,$importdir,$archivedir,$verbosity,$incremental_mode) = @_;
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97 |
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98 | # in this method, we want to know if metadata files are modified or not.
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99 | my $arcinfo_doc_filename = &doc_db_file($archivedir);
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100 |
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101 | my $archiveinf_timestamp = -M $arcinfo_doc_filename;
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102 |
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103 | # First convert all files to absolute form
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104 | # This is to support the situation where the import folder is not
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105 | # the default
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106 |
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107 | my $prev_all_files = $archive_info->{'prev_import_filelist'};
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108 | my $full_prev_all_files = {};
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109 |
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110 | foreach my $prev_file (keys %$prev_all_files) {
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111 |
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112 | if (!&util::filename_is_absolute($prev_file)) {
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113 | my $full_prev_file = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},$prev_file);
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114 | $full_prev_all_files->{$full_prev_file} = $prev_file;
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115 | }
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116 | else {
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117 | $full_prev_all_files->{$prev_file} = $prev_file;
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118 | }
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119 | }
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120 |
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121 |
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122 | # Figure out which are the new files, existing files and so
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123 | # by implication the files from the previous import that are not
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124 | # there any more => mark them for deletion
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125 | foreach my $curr_file (keys %{$block_hash->{'all_files'}}) {
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126 |
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127 | my $full_curr_file = $curr_file;
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128 |
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129 | # entry in 'all_files' is moved to either 'existing_files',
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130 | # 'deleted_files', 'new_files', or 'new_or_modified_metadata_files'
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131 |
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132 | if (!&util::filename_is_absolute($curr_file)) {
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133 | # add in import dir to make absolute
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134 | $full_curr_file = &util::filename_cat($importdir,$curr_file);
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135 | }
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136 |
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137 | # figure out if new file or not
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138 | if (defined $full_prev_all_files->{$full_curr_file}) {
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139 | # delete it so that only files that need deleting are left
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140 | delete $full_prev_all_files->{$full_curr_file};
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141 |
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142 | # had it before. is it a metadata file?
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143 | if ($block_hash->{'metadata_files'}->{$full_curr_file}) {
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144 |
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145 | # is it modified??
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146 | if (-M $full_curr_file < $archiveinf_timestamp) {
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147 | print STDERR "*** Detected a modified metadata file: $full_curr_file\n" if $verbosity > 2;
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148 | # its newer than last build
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149 | $block_hash->{'new_or_modified_metadata_files'}->{$full_curr_file} = 1;
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150 | }
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151 | }
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152 | else {
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153 | if ($incremental_mode eq "all") {
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154 |
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155 | # had it before
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156 | $block_hash->{'existing_files'}->{$full_curr_file} = 1;
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157 |
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158 | }
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159 | else {
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160 | # Warning in "onlyadd" mode, but had it before!
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161 | print STDERR "Warning: File $full_curr_file previously imported.\n";
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162 | print STDERR " Treating as new file\n";
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163 |
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164 | $block_hash->{'new_files'}->{$full_curr_file} = 1;
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165 |
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166 | }
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167 | }
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168 | }
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169 | else {
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170 | if ($block_hash->{'metadata_files'}->{$full_curr_file}) {
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171 | # the new file is the special sort of file greenstone uses
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172 | # to attach metadata to src documents
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173 | # i.e metadata.xml
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174 | # (but note, the filename used is not constrained in
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175 | # Greenstone to always be this)
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176 |
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177 | print STDERR "***** Detected new metadata file: $full_curr_file\n" if $verbosity > 2;
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178 | $block_hash->{'new_or_modified_metadata_files'}->{$full_curr_file} = 1;
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179 | }
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180 | else {
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181 | $block_hash->{'new_files'}->{$full_curr_file} = 1;
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182 | }
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183 | }
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184 |
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185 |
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186 | delete $block_hash->{'all_files'}->{$curr_file};
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187 | }
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188 |
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189 |
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190 |
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191 |
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192 | # Deal with complication of new or modified metadata files by forcing
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193 | # everything from this point down in the file hierarchy to
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194 | # be freshly imported.
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195 | #
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196 | # This may mean files that have not changed are reindexed, but does
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197 | # guarantee by the end of processing all new metadata is correctly
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198 | # associated with the relevant document(s).
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199 |
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200 | foreach my $new_mdf (keys %{$block_hash->{'new_or_modified_metadata_files'}}) {
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201 | my ($fileroot,$situated_dir,$ext) = fileparse($new_mdf, "\\.[^\\.]+\$");
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202 |
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203 | $situated_dir =~ s/[\\\/]+$//; # remove tailing slashes
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204 | $situated_dir =~ s/\\/\\\\/g; # need to protect windows slash \ in regular expression
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205 |
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206 | # Go through existing_files, and mark anything that is contained
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207 | # within 'situated_dir' to be reindexed (in case some of the metadata
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208 | # attaches to one of these files)
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209 |
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210 | my $reindex_files = [];
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211 |
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212 | foreach my $existing_f (keys %{$block_hash->{'existing_files'}}) {
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213 |
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214 | if ($existing_f =~ m/^$situated_dir/) {
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215 | push(@$reindex_files,$existing_f);
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216 | $block_hash->{'reindex_files'}->{$existing_f} = 1;
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217 | delete $block_hash->{'existing_files'}->{$existing_f};
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218 |
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219 | }
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220 | }
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221 |
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222 | # metadata file needs to be in new_files list so parsed by MetadataXMLPlug
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223 | # (or equivalent)
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224 | $block_hash->{'new_files'}->{$new_mdf} = 1;
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225 |
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226 | }
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227 |
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228 | # go through remaining existing files and work out what has changed and needs to be reindexed.
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229 | my @existing_files = sort keys %{$block_hash->{'existing_files'}};
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230 |
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231 | my $reindex_files = [];
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232 |
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233 | foreach my $existing_filename (@existing_files) {
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234 | if (-M $existing_filename < $archiveinf_timestamp) {
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235 | # file is newer than last build
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236 |
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237 | my $existing_file = $existing_filename;
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238 | #my $collectdir = &util::filename_cat($ENV{'GSDLCOLLECTDIR'});
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239 |
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240 | #my $collectdir_resafe = &util::filename_to_regex($collectdir);
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241 | #$existing_file =~ s/^$collectdir_resafe(\\|\/)?//;
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242 |
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243 | print STDERR "**** Reindexing existing file: $existing_file\n";
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244 |
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245 | push(@$reindex_files,$existing_file);
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246 | $block_hash->{'reindex_files'}->{$existing_filename} = 1;
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247 | }
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248 |
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249 | }
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250 |
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251 |
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252 | # By this point full_prev_all_files contains the files
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253 | # mentioned in archiveinf-src.db but are not in the 'import'
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254 | # folder (or whatever was specified through -importdir ...)
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255 |
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256 | # This list can contain files that were created in the 'tmp' or
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257 | # 'cache' areas (such as screen-size and thumbnail images).
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258 | #
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259 | # In building the final list of files to delete, we test to see if
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260 | # it exists on the filesystem and if it does (unusual for a "normal"
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261 | # file in import, but possible in the case of 'tmp' files),
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262 | # supress it from going into the final list
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263 |
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264 | my $collectdir = $ENV{'GSDLCOLLECTDIR'};
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265 |
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266 | my @deleted_files = values %$full_prev_all_files;
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267 | map { my $curr_file = $_;
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268 | my $full_curr_file = $curr_file;
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269 |
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270 | if (!&util::filename_is_absolute($curr_file)) {
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271 | # add in import dir to make absolute
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272 |
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273 | $full_curr_file = &util::filename_cat($collectdir,$curr_file);
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274 | }
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275 |
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276 |
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277 | if (!-e $full_curr_file) {
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278 | $block_hash->{'deleted_files'}->{$curr_file} = 1;
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279 | }
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280 | } @deleted_files;
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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 | # this is used to delete "deleted" docs, and to remove old versions of "changed" docs
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288 | # $mode is 'delete' or 'reindex'
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289 | sub mark_docs_for_deletion
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290 | {
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291 | my ($archive_info,$block_hash,$deleted_files,$archivedir,$verbosity,$mode) = @_;
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292 |
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293 | my $mode_text = "deleted from index";
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294 | if ($mode eq "reindex") {
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295 | $mode_text = "reindexed";
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296 | }
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297 | my $arcinfo_doc_filename = &doc_db_file($archivedir);
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298 | my $arcinfo_src_filename = &src_db_file($archivedir);
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299 |
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300 |
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301 | # record files marked for deletion in arcinfo
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302 | foreach my $file (@$deleted_files) {
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303 | # use 'archiveinf-src' GDBM file to look up all the OIDs
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304 | # that this file is used in (note in most cases, it's just one OID)
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305 |
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306 | my $src_rec = GDBMUtils::gdbmRecordToHash($arcinfo_src_filename,$file);
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307 | my $oids = $src_rec->{'oid'};
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308 | my $file_record_deleted = 0;
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309 |
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310 | # delete the src record
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311 | GDBMUtils::gdbmDatabaseRemove($arcinfo_src_filename,$file);
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312 |
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313 | foreach my $oid (@$oids) {
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314 |
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315 | # find the source doc (the primary file that becomes this oid)
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316 | my $doc_rec = GDBMUtils::gdbmRecordToHash($arcinfo_doc_filename,$oid);
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317 | my $doc_source_file = $doc_rec->{'src-file'}->[0];
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318 | if (!&util::filename_is_absolute($doc_source_file)) {
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319 | $doc_source_file = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},$doc_source_file);
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320 | }
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321 |
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322 | if ($doc_source_file ne $file) {
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323 | # its an associated or metadata file
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324 |
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325 | # mark source doc for reimport as one of its assoc files has changed or deleted
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326 | $block_hash->{'reindex_files'}->{$doc_source_file} = 1;
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327 |
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328 | }
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329 | my $curr_status = $archive_info->get_status_info($oid);
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330 | if (defined($curr_status) && (($curr_status ne "D"))) {
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331 | if ($verbosity>1) {
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332 | print STDERR "$oid ($doc_source_file) marked to be $mode_text on next buildcol.pl\n";
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333 | }
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334 | # mark oid for deletion (it will be deleted or reimported)
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335 | $archive_info->set_status_info($oid,"D");
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336 | my $val = &GDBMUtils::gdbmDatabaseGet($arcinfo_doc_filename,$oid);
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337 | $val =~ s/^<index-status>(.*)$/<index-status>D/m;
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338 | &GDBMUtils::gdbmDatabaseSet($arcinfo_doc_filename,$oid,$val);
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339 | }
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340 | }
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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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