gistfile1.rb

class Claim
  attr_accessor :claim_array

  def initialize(claim_array, claim_ext)
    @claim_array = claim_array
    @claim_ext = claim_ext
    @replacement_first_name = "JOHN"
    @replacement_last_name = "DOE"
    @replacement_full_name = "DOE, JOHN"
    @replacement_npi = "123456"
    @replacement_license_number = "LBAH 5347"
  end

  def check_existing_name
    if @claim_ext == '.ub4'
      @claim_array[489].to_s.downcase == 'hansen' && @claim_array[490].to_s.downcase == 'joel'
    else
      @claim_array[46].to_s.downcase == 'hansen, joel' || @claim_array[46].to_s.downcase == 'hanson, joel dr.'
    end
  end

  def change_claim
    set_physician_name
    set_npi
    if @claim_ext == '.ub4'
      set_license_number
    end
  end

  def set_physician_name
    if @claim_ext == '.ub4'
      @claim_array[489] = @replacement_last_name
      @claim_array[490] = @replacement_first_name
    else
      @claim_array[46] = @replacement_full_name
      @claim_array[277] = @replacement_full_name
    end
  end

  def set_npi
    if @claim_ext == '.ub4'
      @claim_array[491] = @replacement_npi
    else
      @claim_array[47] = @replacement_npi
      @claim_array[85] = @replacement_npi
      @claim_array[105] = @replacement_npi
      @claim_array[124] = @replacement_npi
      @claim_array[143] = @replacement_npi
      @claim_array[162] = @replacement_npi
      @claim_array[181] = @replacement_npi
    end
  end

  def set_license_number
    @claim_array[493] = @replacement_license_number
  end
end

def file_operation
  dir = Dir.glob("#{__dir__}/**/*.{ub4,npi}")
  dir.each do |file|
    claim_ext = File.extname(file)
    file_name = File.basename(file)
    claim_array = File.readlines(file).map(&:chomp)
    claim = Claim.new(claim_array, claim_ext)
    next unless claim.check_existing_name
    claim.change_claim
    new_claim_array = claim.claim_array
    new_claim_array.each do |line|
      line << "\r\n"
    end
    File.open(file, "w") do |file|
      file.puts new_claim_array
    end
    puts "Changed #{file_name}."

  end
  puts "Operation Complete"
  puts "Press any button to close..."
  done_var = gets.strip
end


file_operation