module Sanistring

# File lib/sanistring/sanitize.rb, line 3
def self.sanitize(name, opts = {})
  sanitized = name.split('').map{ |char|
    if opts[:replace] && opts[:replace][char]
      opts[:replace][char]
    elsif opts[:whitelist].is_a?(Symbol)
      case opts[:whitelist]
      when :alpha_numeric, :alphanumeric
        char if !!(/[a-zA-Z0-9]/ =~ char)
      else
        nil
      end 
    elsif opts[:whitelist].is_a?(String) && opts[:whitelist].include?(char)
      char
    else
      nil
    end
  }.compact.join

  sanitized.downcase! if opts[:downcase]
  sanitized.upcase! if opts[:upcase]
  sanitized
end