#!/usr/bin/env ruby
a = ARGV.shift
file = File.new(a)

# Example input:
	# PREFIX : <http://xmlns.com/foaf/0.1/>
	# PREFIX u: <http://kota.s12.xrea.com/vocab/uranai>
	# CONSTRUCT { [ a :Person; :name ?n; :homepage ?hp; u:bloodtype ?bt ] }
	# LQRAPS ?n	?hp	?bt 
	# Dan Brickley	http://danbri.org/	A+
	# etc

prefix = {}
construct = ""
lqraps = {} 
vars=[]
puts
file.each do |l|
  next if l =~ /^#\s+$/
  if l =~ /^#\s*LQRAPS\s*(.*)$/
    spec = $1
    spec.chomp!
    vars = spec.split(/\t/)
    puts "# Vars: #{spec}"
  end	
  if l =~ /^# PREFIX (\w*): <(.*)>$/
    prefix[$1]=$2
    puts "@prefix #{$1}: <#{$2}> ."
  end
  if l =~ /^# CONSTRUCT \{(.*)\}$/
    construct = $1
    puts "# template is: " + construct
  end
  next if l =~ /^#/ && !construct
  next unless l =~ /\w/
  unless l =~ /^#/ 
    puts 
    # debug: puts '# '  + l
    fields = l.split(/\t/)
    i=0
    row = construct.clone
    while (i < vars.length) do
      # puts "Variable #{i} is #{vars[i]} value is: #{fields[i]} "
      re=vars[i]
      re.gsub!(/\?/,"")
      re.chomp!
      val = fields[i]
      val.chomp!
      if val =~ /^http:\// 		# need a better design
        val = '<' + val + '>'
      else 
        val = '"' + val + '"'
      end
      row.gsub!(/\?#{re}/, val)
      i+=1
    end
    puts row + '.'
    puts
  end
end