#!/usr/local/bin/perl

###############################################################################
# Program     : main.cgi
# Author      : Eric Deutsch <edeutsch@systemsbiology.org>
# $Id$
#
# Description : implements caching of (potentially long) urls and retrieval
# via 10 character alphanumeric 'url_key'
#
# SBEAMS is Copyright (C) 2000-2005 Institute for Systems Biology
# This program is governed by the terms of the GNU General Public License (GPL)
# version 2 as published by the Free Software Foundation.  It is provided
# WITHOUT ANY WARRANTY.  See the full description of GPL terms in the
# LICENSE file distributed with this software.
###############################################################################


use strict;
use FindBin;
use lib "$FindBin::Bin/../lib/perl";
use SBEAMS::Connection qw($q $log);
use SBEAMS::Connection::SBPage;
use SBEAMS::Connection::Tables;

{  # 'Main' block

  my $sbeams = new SBEAMS::Connection;

  # Read cgi parameters
  my %params;
  $sbeams->parse_input_parameters( q => $q, parameters_ref => \%params );

  die ( "missing required parameter key" ) unless $params{key};

  my $sql = "SELECT URL from $TB_SHORT_URL WHERE url_key = '$params{key}'";

  my ( $url ) = $sbeams->selectOneColumn( $sql );

  # our version of DBD::Sybase doesn't support bind params, so we may have been
  # forced to substitute in two single quotes for each one in the url.  Fix if
  # and when it becomes feasible, patch with this hack for now:
  $url =~ s/\'\'/\'/g;

  if ( $url ) {
    # We got a valid url, we'll redirect and let that page handle authentication
    $sbeams->sbeams_redirect( uri => $url );

  } else { 
    my $username = $sbeams->Authenticate();
    exit unless $username;

    my $page = SBEAMS::Connection::SBPage->new( user_context => 1,
                                                      sbeams => $sbeams );

    $page->addContent( <<"    END" );
      <FONT SIZE='+1'><B> Error: </B></FONT>
      The specified url key ($params{url_key}) wasn't found in the database
    END
    $page->printPage(); 
  }

} # end main