#!/usr/bin/perl
#
# Routino router custom link CGI
#
# Part of the Routino routing software.
#
# This file Copyright 2008-2010 Andrew M. Bishop
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# Use the generic router script
require "router.pl";

# Use the perl CGI module
use CGI ':cgi';

# Create the query and get the parameters

$query=new CGI;

@rawparams=$query->param;

# Legal CGI parameters with regexp validity check

%legalparams=(
              "lon"             => "[-0-9.]+",
              "lat"             => "[-0-9.]+",
              "zoom"            => "[0-9]+",

              "lon[1-9]"        => "[-0-9.]+",
              "lat[1-9]"        => "[-0-9.]+",
              "transport"       => "[a-z]+",
              "highway-[a-z]+"  => "[0-9.]+",
              "speed-[a-z]+"    => "[0-9.]+",
              "property-[a-z]+" => "[0-9.]+",
              "oneway"          => "(1|0|true|false|on|off)",
              "weight"          => "[0-9.]+",
              "height"          => "[0-9.]+",
              "width"           => "[0-9.]+",
              "length"          => "[0-9.]+",

              "language"        => "[-a-zA-Z]+"
             );

# Validate the CGI parameters, ignore invalid ones

foreach $key (@rawparams)
  {
   foreach $test (keys (%legalparams))
     {
      if($key =~ m%^$test$%)
        {
         $value=$query->param($key);

         if($value =~ m%^$legalparams{$test}$%)
           {
            $cgiparams{$key}=$value;
            last;
           }
        }
     }
  }

# Fill in the default parameters

%fullparams=FillInDefaults(%cgiparams);

# Open template file and output it

$lang=$cgiparams{'language'};

if( -f "router.html.$lang")
  {
   open(TEMPLATE,"<router.html.$lang");
  }
else
  {
   open(TEMPLATE,"<router.html");
  }

# Parse the template and fill in the parameters

print header('text/html');

while(<TEMPLATE>)
  {
   if(m%^<BODY.+>%)
     {
      s/'lat'/$cgiparams{'lat'}/   if(defined $cgiparams{'lat'});
      s/'lon'/$cgiparams{'lon'}/   if(defined $cgiparams{'lon'});
      s/'zoom'/$cgiparams{'zoom'}/ if(defined $cgiparams{'zoom'});
      print;
     }
   elsif(m%<input% && m%<!-- ([^ ]+) *-->%)
     {
      $key=$1;

      m%type="([a-z]+)"%;
      $type=$1;

      m%value="([a-z]+)"%;
      $value=$1;

      if($type eq "radio")
        {
         $checked="";
         $checked="checked" if($fullparams{$key} eq $value);

         s%><!-- .+? *-->% $checked>%;
        }
      elsif($type eq "checkbox")
        {
         $checked="";
         $checked="checked" if($fullparams{$key});

         s%><!-- .+? *-->% $checked>%;
        }
      elsif($type eq "text")
        {
         s%><!-- .+? *-->% value="$fullparams{$key}">%;
        }

      print;
     }
   else
     {
      print;
     }
  }

close(TEMPLATE);