string.rb

class String #:nodoc:
  
  # =================
  # = Class Methods =
  # =================
  def self.alphanumeric(length = 6)
    (1..length).map{ [(0..9), ('a'..'z'), ('A'..'Z')].map(&:to_a).flatten.sample }.join
  end
    
  # ====================
  # = Instance Methods =
  # ====================
  def encrypt(key)
    cipher = OpenSSL::Cipher::AES.new(128, :CBC)
    cipher.encrypt
    cipher.key = key
    cipher.iv = key

    return Base64.urlsafe_encode64(cipher.update(self) + cipher.final)
  end
  
  def decrypt(key)
    decipher = OpenSSL::Cipher::AES.new(128, :CBC)
    decipher.decrypt
    decipher.key = key
    decipher.iv = key

    return (decipher.update(Base64.urlsafe_decode64(self)) + decipher.final)
  end
  
  def split_by_any(*args)
    string = self
    array = string.split(args.first)
    args.to_a.each do |splitter|
      array = array.map{|item| item.split(splitter)}.flatten
    end
    return array.reject{|item| item.blank?}
  end
  
  def email?
    self.match(Regex.email)
  end
  
  def zip_code?
    self.match(Regex.zip_code)
  end
  
  def phone?
    number = self.gsub(/[ -\.\)\(]/, '').gsub(/^1/, '')
    number.match(/^\d{10}$/) and !number.match(/^[01]/)
  end
  
  # =========
  # = Regex =
  # =========
  class Regex
    def self.slug
      /^[\w\d-]+$/
    end
    
    def self.email
      illegals = %q{'"\[\]\(\)<>;,@# }
      /^([^#{illegals}]+)?[^#{illegals}\.]@[^\.#{illegals}]([^#{illegals}]+)?\.[a-z]+$/
    end
    
    def self.login
      /^[a-zA-Z0-9\-_]+$/
    end
    
    def self.zip_code
      /^\d{5}$/
    end
  end
  
end