#!/usr/bin/env ruby

# user settings
source_file           = '/Users/Dan/Desktop/Student Email/emails.csv'
output_base_directory = '/Users/Dan/Desktop/Student Email/'
output_file           = 'Email Username & Password.txt'

# set the following variable to 'true' if you want the script to remove any
# non alphanumeric characters from theuser's name before creating the output
# directory for that user
clean_up_name = false

# the block of text we will later save to
# a file, replacing some items, eg %Password%
# with actual values
text = '
Your new Student email address is %EmailAddress% and your password is %Password% you will be required to change you password the first time you login.

Student email is now located at http://studentemail.domain.com
'

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -  
# ensure the output directory has a trailing '/' on it
output_base_directory = "#{output_directory}/" unless output_base_directory[-1,1] == '/'

# ensure the output directory exists
unless File.exists?(output_base_directory) && File.directory?(output_base_directory)
 puts "Output directory: '#{output_base_directory}' does not appear to exist"
 exit
end

# ensure the source file  exists
unless File.exists?(source_file)
 puts "Source file: '#{source_file}' does not appear to exist"
 exit
end

# open the source file
File.open(source_file) do |f|
  
  # process each line
  f.each_with_index do |line, index| 
    
    # split the line by commas
    email, password, name = line.split(',')

    # trim any whitespace or carriage
    # returns from the variables
    email.strip!
    password.strip!
    name.strip!

    # set the name for the file we will create.  For safety
    # we will replace any odd characters in the user name
    # with underscores.  We will also need to create the
    # directory for it.
    output = clean_up_name ? output_base_directory + name.gsub(/[^a-zA-Z0-9]/, '_') + '/' : output_base_directory + name + '/'  
    Dir.mkdir(output) unless File.exists?(output)
    output = output + output_file 
   
    # take a copy of our text and replace the placeholders 
    # in the block of text with the real name, email, etc
    mytext = String.new(text) 
    mytext.gsub!('%EmailAddress%', email)
    mytext.gsub!('%Password%',     password)
    mytext.gsub!('%Name%',         name)  
    
    # write the new file
    File.open(output, 'w') { |o| o.write(mytext) }    
    
    # just some output to the console so we can see what
    # is happening
    if File.exists? output
      puts "Processed line: #{index} (#{name}) and saved file as: #{output}"
    else
      puts "Failed to process line: #{index} (#{name})."    
    end
    
  end
end
puts "All done"