-for ($source) { # cleanup
- s/\A\(// and s/\);?\s*\Z//; # empty callback
- next if /^\{/; # valid json
-
- # convert seperate variables to hash keys
- s/\A/{\n/;
- s/^caniuse\.(\w+) *= */"$1":/gm;
- s/;$/,/gm;
- s/,\s*\Z/\n}/;
- # fractions not supported by barekey
- s/(?<=[,{\n]) (\d*\.\d) (?=:['"])/"$1"/gx;
- # escapes not supported in singlequote
- s{: *\K'((?:[^\\']+|\\.)*)'}{
- my $_ = $1;
- s/"/\\"/g;
- s/\\'/'/g;
- qq("$_");
- }ge;
+$JSON::PP::false = 0;
+$JSON::PP::true = 1;
+
+my $data = decode_json($source);
+$data->{-date} = Time::Piece->new($_)->datetime
+ for delete $data->{updated} || ();
+
+delete $data->{eras};
+for (values %{ $data->{data} }) {
+ delete @{$_}{qw[ usage_perc_a usage_perc_y ]};
+}
+for (values %{ $data->{agents} }) {
+ delete $_->{usage_global};
+}
+
+while (my ($browser, $target) = each %BROWSERJOIN) {
+ my $agent1 = delete $data->{agents}->{$browser} or next;
+ my $agent2 = $data->{agents}->{$target} or next;
+ push @{ $agent2->{version_list} }, @{ $agent1->{version_list} };
+ $agent2->{browser} = sprintf '%s (former %s)',
+ $agent1->{browser}, $agent2->{browser};
+
+ for (values %{ $data->{data} }) {
+ my $stats = delete $_->{stats}->{$browser} or next;
+ $_ = { %{$_}, %{$stats} } for $_->{stats}->{$target};
+ }