Index: gsdl/trunk/perllib/plugins/MetadataEXIFPlugin.pm
===================================================================
--- gsdl/trunk/perllib/plugins/MetadataEXIFPlugin.pm	(revision 18516)
+++ gsdl/trunk/perllib/plugins/MetadataEXIFPlugin.pm	(revision 18516)
@@ -0,0 +1,215 @@
+###########################################################################
+#
+# MetadataEXIFPlugin.pm -- A plugin for EXIF
+#
+# A component of the Greenstone digital library software
+# from the New Zealand Digital Library Project at the 
+# University of Waikato, New Zealand.
+#
+# Copyright 2007 New Zealand Digital Library Project
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+#
+###########################################################################
+
+
+package MetadataEXIFPlugin;
+
+use BasePlugin;
+
+use Image::ExifTool qw(:Public);
+use strict;
+
+no strict 'refs'; # allow filehandles to be variables and viceversa
+
+
+sub BEGIN
+{
+  @MetadataEXIFPlugin::ISA = ('BasePlugin');
+}
+
+
+
+my $arguments =
+    [ ];
+
+
+my $options = { 'name'     => "MetadataEXIFPlugin",
+		'desc'     => "{MetadataBasPlug.desc}",
+		'abstract' => "no",
+		'inherits' => "yes",
+		'args'     => $arguments };
+
+sub new()
+{
+    my ($class) = shift (@_);
+    my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
+    push(@$pluginlist, $class);
+
+    if(defined $arguments){ push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});}
+    if(defined $options) { push(@{$hashArgOptLists->{"OptList"}},$options)};
+
+    my $self = new BasePlugin($pluginlist, $inputargs, $hashArgOptLists);
+
+
+    # Create a new Image::ExifTool object
+    my $exifTool = new Image::ExifTool;
+    $exifTool->Options(Duplicates => 0);
+    $exifTool->Options(PrintConv => 0);
+    $exifTool->Options(Unknown => 1);
+    $exifTool->Options('Verbose');
+    $self->{'exiftool'} = $exifTool;
+
+
+    return bless $self, $class;
+}
+
+
+# Need to think some more about this
+sub get_default_process_exp()
+{
+    return q^(?i)\.(wma|wmv|jpe?g|gif)$^;
+}
+
+
+# This plugin doesn't block any files 
+sub get_default_block_exp()
+{
+    return '';
+}
+
+
+sub extractEmbeddedMetadata()
+{
+    my $self = shift(@_);
+    my ($file, $filename, $extrametadata, $extrametakeys) = @_;
+
+    my %exif_metadata = ();
+
+    my $verbosity = $self->{'verbosity'};
+    my $outhandle = $self->{'outhandle'};
+
+    my $metadata_count = 0;
+    
+    my @group_list = Image::ExifTool::GetAllGroups(0);
+    foreach my $group (@group_list)
+      {
+##	  print STDERR "**** group = $group\n";
+
+        # Extract meta information from an image
+        $self->{'exiftool'}->Options(Group0 => [$group]);
+        $self->{'exiftool'}->ExtractInfo($filename);
+
+        # Get list of tags in the order they were found in the file
+        my @tag_list = $self->{'exiftool'}->GetFoundTags('File');
+        foreach my $tag (@tag_list)
+          {
+###	      print STDERR "**** tag = $tag\n";
+
+            # Strip any numbering suffix
+            $tag =~ s/^([^\s]+)\s.*$/$1/i;
+            my $value = $self->{'exiftool'}->GetValue($tag);
+            if (defined $value && $value =~ /[a-z0-9]+/i)
+              {
+                if (ref $value eq 'SCALAR')
+                  {
+                    if ($$value =~ /^Binary data/)
+                      {
+                        $value = "($$value)";
+                      }
+                    else
+                      {
+                        my $len = length($$value);
+                        $value = "(Binary data $len bytes)";
+                      }
+                  }
+
+		my $field = "$group.$tag";
+
+		if (!defined $exif_metadata{$field})
+		{
+		    $exif_metadata{$field} = [];
+		}
+		push (@{$exif_metadata{$field}}, $self->gsSafe($value));
+##		print STDERR "**** adding $field: $value\n";
+
+		++$metadata_count;
+              }
+          }
+      }
+
+
+    if ($metadata_count > 0) {
+	print $outhandle " Extracted $metadata_count pieces of metadata from $filename EXIF block\n";
+    }
+  
+  # Associate the metadata now
+##    print STDERR "**** file = $file\n";
+
+  $extrametadata->{$file} = \%exif_metadata;
+  push(@$extrametakeys, $file);
+
+}
+
+
+sub metadata_read()
+{
+  my $self = shift (@_);
+  my ($pluginfo, $base_dir, $file, $block_hash, $extrametakeys, $extrametadata, $processor, $maxdocs, $gli) = @_;
+  
+
+
+  # See if we are looking at a PDF file... which may contain EXIF
+  my $filename = &util::filename_cat($base_dir, $file);
+#  if ($filename !~ /\.pdf$/i || !-f $filename)
+#    {
+#      return undef;
+#    }
+
+  print STDERR "\n<Processing n='$file' p='MetadataEXIFPlugin'>\n" if ($gli);
+  print STDERR "MetadataEXIFPlugin: processing $file\n" if ($self->{'verbosity'}) > 1;
+
+
+  $self->extractEmbeddedMetadata($file,$filename,
+				 $extrametadata,$extrametakeys);
+
+    
+  return undef;
+}
+
+
+sub process()
+{
+    # not used
+    return undef;
+}
+
+sub gsSafe()
+  {
+    my $self = shift(@_);
+    my ($text) = @_;
+    # Replace dangerous characters
+    $text =~ s/\(/&#40;/g;
+    $text =~ s/\)/&#41;/g;
+    $text =~ s/,/&#44;/g;
+    $text =~ s/\</&#60;/g;
+    $text =~ s/\</&#62;/g;
+    $text =~ s/\[/&#91;/g;
+    $text =~ s/\]/&#93;/g;
+    # Done
+    return $text;
+  }
+
+1;
