1 | ###########################################################################
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2 | #
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3 | # docsave.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 | # This document processor saves a document in the
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27 | # archives directory of a collection (as xml)
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28 |
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29 |
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30 | package docsave;
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31 |
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32 | eval {require bytes};
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33 |
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34 | use arcinfo;
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35 | use docproc;
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36 | use util;
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37 |
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38 |
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39 | sub BEGIN {
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40 | @ISA = ('docproc');
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41 | }
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42 |
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43 | sub new {
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44 | my ($class, $collection, $archive_info, $verbosity,
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45 | $gzip, $groupsize, $outhandle) = @_;
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46 | my $self = new docproc ();
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47 |
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48 |
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49 | $groupsize=1 unless defined $groupsize;
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50 | $self->{'collection'} = $collection;
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51 | $self->{'archive_info'} = $archive_info;
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52 | $self->{'verbosity'} = $verbosity;
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53 | $self->{'gzip'} = $gzip;
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54 |
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55 | $self->{'groupsize'} = $groupsize;
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56 | $self->{'gs_count'} = 0;
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57 |
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58 | $self->{'outhandle'} = STDERR;
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59 | $self->{'outhandle'} = $outhandle if defined $outhandle;
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60 | # set a default for the archive directory
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61 | $self->{'archive_dir'} = &util::filename_cat ($ENV{'GSDLCOLLECTDIR'}, "archives");
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62 |
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63 | $self->{'sortmeta'} = undef;
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64 |
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65 | return bless $self, $class;
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66 | }
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67 |
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68 | sub setarchivedir {
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69 | my $self = shift (@_);
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70 | my ($archive_dir) = @_;
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71 |
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72 | &util::mk_all_dir ($archive_dir) unless -e $archive_dir;
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73 | $self->{'archive_dir'} = $archive_dir;
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74 | }
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75 |
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76 | sub set_sortmeta {
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77 | my $self = shift (@_);
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78 | my ($sortmeta) = @_;
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79 |
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80 | $self->{'sortmeta'} = $sortmeta;
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81 | }
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82 |
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83 | sub process {
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84 | my $self = shift (@_);
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85 | my ($doc_obj) = @_;
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86 |
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87 | my $outhandle = $self->{'outhandle'};
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88 |
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89 | if ($self->{'groupsize'} > 1) {
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90 | $self->group_process ($doc_obj);
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91 |
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92 | } else {
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93 | # groupsize is 1 (i.e. one document per XML file) so sortmeta
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94 | # may be used
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95 |
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96 | my $OID = $doc_obj->get_OID();
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97 | $OID = "NULL" unless defined $OID;
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98 |
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99 | # get document's directory
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100 | my $doc_dir = $self->get_doc_dir ($OID);
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101 |
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102 | # copy all the associated files, add this information as metadata
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103 | # to the document
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104 | $self->process_assoc_files ($doc_obj, $doc_dir);
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105 |
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106 | my $doc_file
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107 | = &util::filename_cat ($self->{'archive_dir'}, $doc_dir, "doc.xml");
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108 | my $short_doc_file = &util::filename_cat ($doc_dir, "doc.xml");
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109 |
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110 | if (!open (OUTDOC, ">$doc_file")) {
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111 | print $outhandle "docsave::process could not write to file $doc_file\n";
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112 | return;
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113 | }
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114 |
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115 | # save this document
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116 | $self->output_xml_header('docsave::OUTDOC');
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117 | $doc_obj->output_section('docsave::OUTDOC', $doc_obj->get_top_section());
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118 | $self->output_xml_footer('docsave::OUTDOC');
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119 | close OUTDOC;
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120 |
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121 | if ($self->{'gzip'}) {
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122 | my $doc_file = $self->{'gs_filename'};
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123 | `gzip $doc_file`;
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124 | $doc_file .= ".gz";
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125 | $short_doc_file .= ".gz";
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126 | if (!-e $doc_file) {
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127 | print $outhandle "error while gzipping: $doc_file doesn't exist\n";
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128 | return 0;
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129 | }
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130 | }
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131 |
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132 | # do the sortmeta thing
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133 | my ($metadata);
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134 | if (defined ($self->{'sortmeta'})) {
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135 | $metadata = $doc_obj->get_metadata_element ($doc_obj->get_top_section(), $self->{'sortmeta'});
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136 | }
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137 |
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138 | # store reference in the archive_info
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139 | $self->{'archive_info'}->add_info($OID, $short_doc_file, $metadata);
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140 | }
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141 | }
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142 |
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143 | sub group_process {
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144 | my $self = shift (@_);
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145 | my ($doc_obj) = @_;
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146 |
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147 | my $outhandle = $self->{'outhandle'};
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148 |
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149 | my $OID = $doc_obj->get_OID();
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150 | $OID = "NULL" unless defined $OID;
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151 |
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152 | my $groupsize = $self->{'groupsize'};
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153 | my $gs_count = $self->{'gs_count'};
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154 | my $open_new_file = (($gs_count % $groupsize)==0);
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155 |
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156 | # opening a new file, or document has assoicated files => directory needed
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157 | if (($open_new_file) || (scalar(@{$doc_obj->get_assoc_files()})>0)) {
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158 |
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159 | # get document's directory
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160 | my $doc_dir = $self->get_doc_dir ($OID);
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161 |
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162 | # copy all the associated files, add this information as metadata
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163 | # to the document
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164 | $self->process_assoc_files ($doc_obj, $doc_dir);
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165 |
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166 |
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167 | if ($open_new_file) {
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168 | # only if opening new file
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169 | my $doc_file
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170 | = &util::filename_cat ($self->{'archive_dir'}, $doc_dir, "doc.xml");
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171 | my $short_doc_file = &util::filename_cat ($doc_dir, "doc.xml");
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172 |
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173 | if ($gs_count>0)
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174 | {
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175 | return if (!$self->close_file_output());
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176 | }
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177 |
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178 | if (!open (OUTDOC, ">$doc_file")) {
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179 | print $outhandle "docsave::group_process could not write to file $doc_file\n";
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180 | return;
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181 | }
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182 | $self->{'gs_filename'} = $doc_file;
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183 | $self->{'gs_short_filename'} = $short_doc_file;
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184 | $self->{'gs_OID'} = $OID;
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185 |
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186 | $self->output_xml_header('docsave::OUTDOC');
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187 | }
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188 | }
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189 |
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190 | # save this document
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191 | $doc_obj->output_section('docsave::OUTDOC', $doc_obj->get_top_section());
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192 |
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193 | $self->{'gs_count'}++;
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194 | }
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195 |
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196 |
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197 | sub get_doc_dir {
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198 | my $self = shift (@_);
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199 | my ($OID) = @_;
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200 |
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201 | my $doc_info = $self->{'archive_info'}->get_info($OID);
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202 | my $doc_dir = "";
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203 | if (defined $doc_info && scalar(@$doc_info) >= 1) {
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204 | # this OID already has an assigned directory, use the
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205 | # same one.
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206 | $doc_dir = $doc_info->[0];
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207 | $doc_dir =~ s/\/?doc\.xml(\.gz)?$//;
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208 | } else {
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209 | # have to get a new document directory
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210 | my $doc_dir_rest = $OID;
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211 | my $doc_dir_num = 0;
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212 | do {
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213 | $doc_dir .= "/" if $doc_dir_num > 0;
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214 | if ($doc_dir_rest =~ s/^(.{1,8})//) {
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215 | $doc_dir .= $1;
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216 | $doc_dir_num++;
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217 | }
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218 | } while ($doc_dir_rest ne "" &&
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219 | ((-d &util::filename_cat ($self->{'archive_dir'}, "$doc_dir.dir")) ||
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220 | ($self->{'archive_info'}->size() >= 1024 && $doc_dir_num < 2)));
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221 | $doc_dir .= ".dir";
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222 |
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223 | }
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224 |
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225 | &util::mk_all_dir (&util::filename_cat ($self->{'archive_dir'}, $doc_dir));
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226 |
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227 | return $doc_dir;
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228 | }
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229 |
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230 |
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231 | sub process_assoc_files {
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232 | my $self = shift (@_);
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233 | my ($doc_obj, $doc_dir) = @_;
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234 |
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235 | my $outhandle = $self->{'outhandle'};
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236 |
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237 | my @assoc_files = ();
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238 | foreach $assoc_file (@{$doc_obj->get_assoc_files()}) {
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239 | my ($dir, $afile) = $assoc_file->[1] =~ /^(.*?)([^\/\\]+)$/;
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240 | $dir = "" unless defined $dir;
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241 | if (-e $assoc_file->[0]) {
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242 | my $filepath = &util::filename_cat($self->{'archive_dir'}, $doc_dir, $afile);
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243 | &util::hard_link ($assoc_file->[0], $filepath);
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244 | $doc_obj->add_utf8_metadata ($doc_obj->get_top_section(),
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245 | "gsdlassocfile",
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246 | "$afile:$assoc_file->[2]:$dir");
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247 | $doc_obj->set_utf8_metadata_element ($doc_obj->get_top_section(),
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248 | "assocfilepath",
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249 | "$doc_dir");
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250 | } elsif ($self->{'verbosity'} > 2) {
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251 | print $outhandle "docsave::process couldn't copy the associated file " .
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252 | "$assoc_file->[0] to $afile\n";
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253 | }
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254 | }
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255 | }
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256 |
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257 |
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258 | sub close_file_output
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259 | {
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260 | my ($self) = @_;
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261 |
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262 | # make sure that the handle has been opened - it won't be if we failed
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263 | # to import any documents...
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264 | if (defined(fileno(docsave::OUTDOC))) {
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265 | $self->output_xml_footer('docsave::OUTDOC');
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266 | close OUTDOC;
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267 | }
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268 |
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269 | my $OID = $self->{'gs_OID'};
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270 | my $short_doc_file = $self->{'gs_short_filename'};
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271 |
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272 | if ($self->{'gzip'}) {
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273 | my $doc_file = $self->{'gs_filename'};
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274 | `gzip $doc_file`;
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275 | $doc_file .= ".gz";
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276 | $short_doc_file .= ".gz";
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277 | if (!-e $doc_file) {
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278 | my $outhandle = $self->{'outhandle'};
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279 | print $outhandle "error while gzipping: $doc_file doesn't exist\n";
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280 | return 0;
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281 | }
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282 | }
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283 |
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284 | # store reference in the archive_info
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285 | $self->{'archive_info'}->add_info($OID, $short_doc_file);
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286 |
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287 | return 1;
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288 | }
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289 |
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290 | sub output_xml_header {
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291 | my $self = shift (@_);
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292 | my ($handle) = @_;
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293 |
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294 | print $handle '<?xml version="1.0" encoding="UTF-8" standalone="no"?>' . "\n";
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295 | print $handle '<!DOCTYPE Archive SYSTEM "http://greenstone.org/dtd/Archive/1.0/Archive.dtd">' . "\n";
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296 | print $handle "<Archive>\n";
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297 | }
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298 |
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299 | sub output_xml_footer {
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300 | my $self = shift (@_);
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301 | my ($handle) = @_;
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302 |
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303 | print $handle "</Archive>\n";
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304 | }
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305 |
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306 | 1;
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