Add a script which adds EXIF information for all images lacking it.

diff --git a/perl/update-image-info.pl b/perl/update-image-info.pl
new file mode 100755 (executable)
index 0000000..41d8237
--- /dev/null
+++ b/perl/update-image-info.pl
@@ -0,0 +1,84 @@
+#! /usr/bin/perl
+use lib qw(.);
+use DBI;
+use POSIX;
+use Image::ExifTool;
+use Encode;
+use strict;
+use warnings;
+
+use Sesse::pr0n::Config;
+eval {
+       require Sesse::pr0n::Config_local;
+};
+       
+my $dbh = DBI->connect("dbi:Pg:dbname=pr0n;host=" . $Sesse::pr0n::Config::db_host,
+       $Sesse::pr0n::Config::db_username, $Sesse::pr0n::Config::db_password)
+       or die "Couldn't connect to PostgreSQL database: " . DBI->errstr;
+$dbh->{RaiseError} = 1;
+
+my $q = $dbh->prepare('SELECT id FROM images WHERE id NOT IN ( SELECT DISTINCT image FROM exif_info ) ORDER BY id');
+$q->execute;
+
+while (my $ref = $q->fetchrow_hashref) {
+       my $id = $ref->{'id'};
+
+       # Copied almost verbatim from Sesse::pr0n::Common::update_image_info
+       my $info = Image::ExifTool::ImageInfo(get_disk_location($id));
+       my $width = $info->{'ImageWidth'} || -1;
+       my $height = $info->{'ImageHeight'} || -1;
+       my $datetime = undef;
+                       
+       if (defined($info->{'DateTimeOriginal'})) {
+               # Parse the date and time over to ISO format
+               if ($info->{'DateTimeOriginal'} =~ /^(\d{4}):(\d\d):(\d\d) (\d\d):(\d\d):(\d\d)(?:\+\d\d:\d\d)?$/ && $1 > 1990) {
+                       $datetime = "$1-$2-$3 $4:$5:$6";
+               }
+       }
+
+       $dbh->do('UPDATE images SET width=?, height=?, date=? WHERE id=?',
+                undef, $width, $height, $datetime, $id)
+               or die "Couldn't update width/height in SQL: $!";
+
+       $dbh->do('DELETE FROM exif_info WHERE image=?',
+               undef, $id)
+               or die "Couldn't delete old EXIF information in SQL: $!";
+
+       my $q = $dbh->prepare('INSERT INTO exif_info (image,tag,value) VALUES (?,?,?)')
+               or die "Couldn't prepare inserting EXIF information: $!";
+
+       for my $key (keys %$info) {
+               next if ref $info->{$key};
+               $q->execute($id, $key, guess_charset($info->{$key}))
+                       or die "Couldn't insert EXIF information in database: $!";
+       }
+
+       # update the last_picture cache as well (this should of course be done
+       # via a trigger, but this is less complicated :-) )
+       $dbh->do('UPDATE last_picture_cache SET last_picture=GREATEST(last_picture, ?) WHERE event=(SELECT event FROM images WHERE id=?)',
+               undef, $datetime, $id)
+               or die "Couldn't update last_picture in SQL: $!";
+
+       print "Updated $id.\n";
+}
+
+sub get_disk_location {
+       my ($id) = @_;
+        my $dir = POSIX::floor($id / 256);
+       return "/srv/pr0n.sesse.net/images/$dir/$id.jpg";
+}
+
+sub guess_charset {
+       my $text = shift;
+       my $decoded;
+
+       eval {
+               $decoded = Encode::decode("utf-8", $text, Encode::FB_CROAK);
+       };
+       if ($@) {
+               $decoded = Encode::decode("iso8859-1", $text);
+       }
+
+       return $decoded;
+}
+