update_plot.rb

require "gphone_plotter_constants"
require "gphone_plotter_GnuplotScript"
require "gphone_plotter_FtpScript"
require "digest"

hash_file_path = "outputs/plot_hash.txt"
md5_new = Digest::MD5.hexdigest(File.read(CONSTANTS[:earthquake_file_path]))

gnuplot_script = GnuplotScript.new(CONSTANTS[:gnuplot_script_path], METERS)
ftp_script = FtpScript.new(CONSTANTS[:ftp_script_path], CONSTANTS[:www_ftp_user], CONSTANTS[:www_ftp_pass], [CONSTANTS[:plot_file_path]])

md5_f = File.new(hash_file_path,"a+")
md5_f.rewind
md5_s = md5_f.gets.chomp unless md5_f.eof?

if md5_s == md5_new
  puts "No changes detected in '#{CONSTANTS[:earthquake_file_path]}'"
else
  puts "Creating gnuplot script..."
  gnuplot_script.create
  puts "Running '#{CONSTANTS[:data_file_path]}' to gnuplot..."
  gnuplot_script.execute
  
  puts "\nCreating FTP script..."
  ftp_script.create
  puts "Running FTP script..."
  ftp_script.execute
  
  puts "\nWriting new MD5: #{md5_new}"
  md5_f.rewind
  md5_f.print md5_new
end
sleep 2