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diff --git a/lib/Lintian/Data/Fonts.pm b/lib/Lintian/Data/Fonts.pm
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+# -*- perl -*-
+#
+# Copyright (C) 2021 Felix Lechner
+#
+# 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, see <http://www.gnu.org/licenses/>.
+
+package Lintian::Data::Fonts;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Const::Fast;
+use File::Basename;
+use List::SomeUtils qw(first_value uniq);
+use PerlIO::gzip;
+use Unicode::UTF8 qw(encode_utf8);
+
+const my $SPACE => q{ };
+const my $SLASH => q{/};
+
+const my $FONTS => 'fonts';
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Data::PreambledJSON';
+
+=head1 NAME
+
+Lintian::Data::Fonts - Lintian interface for fonts.
+
+=head1 SYNOPSIS
+
+    use Lintian::Data::Fonts;
+
+=head1 DESCRIPTION
+
+This module provides a way to load data files for fonts.
+
+=head1 INSTANCE METHODS
+
+=over 4
+
+=item title
+
+=item location
+
+=item installable_names_by_font
+
+=cut
+
+has title => (
+    is => 'rw',
+    default => 'Fonts Available for Installation'
+);
+
+has location => (
+    is => 'rw',
+    default => 'fonts.json'
+);
+
+has installable_names_by_font => (is => 'rw', default => sub { {} });
+
+=item all
+
+=cut
+
+sub all {
+    my ($self) = @_;
+
+    return keys %{$self->installable_names_by_font};
+}
+
+=item installed_by
+
+=cut
+
+sub installed_by {
+    my ($self, $name) = @_;
+
+    my $lowercase = lc $name;
+
+    return ()
+      unless exists $self->installable_names_by_font->{$lowercase};
+
+    my @installed_by = @{$self->installable_names_by_font->{$lowercase} // []};
+
+    return @installed_by;
+}
+
+=item load
+
+=cut
+
+sub load {
+    my ($self, $search_space, $our_vendor) = @_;
+
+    my @candidates = map { $_ . $SLASH . $self->location } @{$search_space};
+    my $path = first_value { -e } @candidates;
+
+    my $reference;
+    return 0
+      unless $self->read_file($path, \$reference);
+
+    my %fonts = %{$reference // {}};
+    my %installable_names_by_font;
+
+    for my $name (keys %fonts) {
+
+        my @installable_names;
+        push(@installable_names, @{$fonts{$name}{installed_by}});
+
+        $installable_names_by_font{$name} = \@installable_names;
+    }
+
+    $self->installable_names_by_font(\%installable_names_by_font);
+
+    return 1;
+}
+
+=item refresh
+
+=cut
+
+sub refresh {
+    my ($self, $archive, $basedir) = @_;
+
+    # neutral sort order
+    local $ENV{LC_ALL} = 'C';
+
+    my $port = 'amd64';
+
+    my %fonts;
+
+    for my $installable_architecture ('all', $port) {
+
+        my $local_path
+          = $archive->contents_gz('sid', 'main', $installable_architecture);
+
+        open(my $fd, '<:gzip', $local_path)
+          or die encode_utf8("Cannot open $local_path.");
+
+        while (my $line = <$fd>) {
+
+            chomp $line;
+
+            my ($path, $finder) = split($SPACE, $line, 2);
+            next
+              unless length $path
+              && length $finder;
+
+            if ($path =~ m{ [.] (?:[to]tf|pfb) $}ix) {
+
+                my @locations = split(m{,}, $finder);
+                for my $location (@locations) {
+
+                    my ($section, $installable_name)
+                      = split(m{/}, $location, 2);
+
+        # Record only packages starting with ttf-, otf-, t1-, xfonts- or fonts-
+                    next
+                      unless $installable_name
+                      =~ m{^ (?: [to]tf | t1 | x?fonts ) - }x;
+
+                    my $basename = basename($path);
+                    my $lowercase = lc $basename;
+
+                    $fonts{$lowercase}{installed_by} //= [];
+                    push(@{$fonts{$lowercase}{installed_by}},
+                        $installable_name);
+                }
+
+                next;
+            }
+        }
+
+        close $fd;
+    }
+
+    my $data_path = "$basedir/" . $self->location;
+    my $status = $self->write_file($FONTS, \%fonts,$data_path);
+
+    return $status;
+}
+
+=back
+
+=head1 AUTHOR
+
+Originally written by Felix Lechner <felix.lechner@lease-up.com> for Lintian.
+
+=head1 SEE ALSO
+
+lintian(1)
+
+=cut
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et