# This program is copyright Jonathan Feinberg 1999.
# This program is distributed under the same terms as infobot.

# Jonathan Feinberg
# jdf@pobox.com
# http://pobox.com/~jdf/

# Version 1.0
# First public release.

# hacked by Tim@Rikers.org to handle new URL and layout

package babel;
use strict;

my $no_babel;

BEGIN {
    eval "use URI::Escape";    # utility functions for encoding the
    if ($@) { $no_babel++};    # babelfish request
    eval "use LWP::UserAgent";
    if ($@) { $no_babel++};
}

BEGIN {
  # Translate some feasible abbreviations into the ones babelfish
  # expects.
    use vars qw!%lang_code $lang_regex!;
    %lang_code = (
		'fr' => 'fr',
		'sp' => 'es',
		'es' => 'es',
		'po' => 'pt',
		'pt' => 'pt',
		'it' => 'it',
		'ge' => 'de',
		'de' => 'de',
		'gr' => 'de',
		'en' => 'en',
		'zh' => 'zh',
		'ja' => 'ja',
		'jp' => 'ja',
		'ko' => 'ko',
		'kr' => 'ko',
		'ru' => 'ru'
	       );

  # Here's how we recognize the language you're asking for.  It looks
  # like RTSL saves you a few keystrokes in #perl, huh?
  $lang_regex = join '|', keys %lang_code;
}

sub babelfish {
    return '' if $no_babel;
  my ($from, $to, $phrase) = @_;
  &main::DEBUG("babelfish($from, $to, $phrase)");

  $from = $lang_code{$from};
  $to = $lang_code{$to};

  my $ua = new LWP::UserAgent;
  $ua->proxy('http', $::param{'httpProxy'}) if (&::IsParam("httpProxy"));
  # Let's pretend
  $ua->agent("Mozilla/5.0 " . $ua->agent);
  $ua->timeout(5);

  my $req =
    #HTTP::Request->new('POST', 'http://babelfish.altavista.com/raging/translate.dyn');
    HTTP::Request->new('POST', 'http://babelfish.altavista.com/babelfish/tr');

# babelfish ignored this, but it SHOULD work
# Accept-Charset: iso-8859-1
#  $req->header('Accept-Charset' => 'iso-8859-1');
#  print $req->header('Accept-Charset');
  $req->header('Accept-Language' => 'en');
  $req->content_type('application/x-www-form-urlencoded');

  return translate($phrase, "${from}_${to}", $req, $ua);
}

sub translate {
    return '' if $no_babel;
  my ($phrase, $languagepair, $req, $ua) = @_;
  &main::DEBUG("translate($phrase, $languagepair, $req, $ua)");

  my $urltext = uri_escape($phrase);
  $req->content("urltext=$urltext&lp=$languagepair");
  &main::DEBUG("http://babelfish.altavista.com/babelfish/tr??urltext=$urltext&lp=$languagepair");

  my $res = $ua->request($req);
  my $translated;

  if ($res->is_success) {
      my $html = $res->content;
      # This method subject to change with the whims of Altavista's design
      # staff.
      ($translated) = $html;

      $translated =~ s/<[^>]*>//sg;
      $translated =~ s/&nbsp;/ /sg;
      $translated =~ s/\s+/ /sg;
      #&main::DEBUG("$translated\n===remove <attributes>\n");

      $translated =~ s/\s*Translate again.*//i;
      &main::DEBUG("$translated\n===remove after 'Translate again'\n");

      $translated =~ s/[^:]*?:\s*(Help\s*)?//s;
      &main::DEBUG("$translated\n===remove to first ':', optional Help\n");

      $translated =~ s/\n/ /g;
      # FIXME: should we do unicode->iso (no. use utf8!)
  } else {
      $translated = ":("; # failure
  }
  &main::pSReply($translated);
}

if (0) {
    if (-t STDIN) {
	#my $result = babel::babelfish('en','sp','hello world');
	#my $result = babel::babelfish('en','sp','The cheese is old and moldy, where is the bathroom?');
	my $result = babel::babelfish('en','gr','doesn\'t seem to translate things longer than 40 characters');
	$result =~ s/; /\n/g;
	print "Babelfish says: \"$result\"\n";
    }
}

1;
