module Challah
  module UserAttributeable

    extend ActiveSupport::Concern

    included do
      attr_reader :password
      attr_reader :password_confirmation
      attr_reader :password_updated

      before_save :ensure_user_tokens
      before_validation :normalize_user_email
    end

    # First name and last name together
    def name
      "#{ first_name } #{ last_name }".strip
    end

    # shortened name, just includes the first name and last initial
    def small_name
      "#{ first_name.to_s.titleize } #{ last_name.to_s.first.upcase }."
    end

    # Is this user valid and ready for a user session?
    #
    # Override this method if you need to check for a particular configuration on each page request.
    def valid_session?
      true
    end

    protected

      # Ensure that all system-generated columns aren't blank on each save
      def ensure_user_tokens
        ensure_api_key_presence
        ensure_email_hash_presence
        ensure_persistence_token_presence
      end

      # Store a random seed for this user's api key
      def ensure_api_key_presence
        if respond_to?("api_key=")
          if self.api_key.to_s.blank?
            self.api_key = Random.token(50)
          end
        end
      end

      # Store a hashed email if the column exists
      def ensure_email_hash_presence
        if respond_to?("email_hash=")
          if email_changed?
            self.email_hash = generate_email_hash
          end
        end
      end

      # Store a random token to identify user in persisted objects
      def ensure_persistence_token_presence
        if respond_to?("persistence_token=")
          if self.persistence_token.to_s.blank?
            self.persistence_token = Random.token(125)
          end
        end
      end

      def generate_email_hash
        if self.email.present?
          Encrypter.md5(email.to_s.downcase.strip)
        end
      end

      # Downcase email and strip if of whitespace
      # Ex: "   HELLO@example.com   " => "hello@example.com"
      def normalize_user_email
        self.email = self.email.to_s.downcase.strip
      end

  end
end