#!/usr/bin/ruby
# WA5ZNU

require 'patterns'

print "Content-type: image/svg+xml"
print "\n\n"

def sanitize_string(v)
  v.gsub("[^a-zA-Z0-9.,-]", "")
end

$query_string = ENV['QUERY_STRING']
$query_string = sanitize_string($query_string)
$filenames = []
$query_string.split(',').each { |f|
  $filenames << ("../data/"+f)
}
print(Patterns.new(-40,-70,5,10).polarLinesGraph($filenames))