require 'hashid/rails/version'
require 'hashids'
require 'active_record'

module Hashid
  module Rails
    def self.included(base)
      base.extend ClassMethods
    end

    def encoded_id
      self.class.encode_id(id)
    end

    def to_param
      encoded_id
    end
    alias_method :hashid, :to_param

    module ClassMethods
      def hashids
        Hashids.new(table_name, 6)
      end

      def encode_id(id)
        hashids.encode(id)
      end

      def decode_id(id)
        hashids.decode(id).first
      end

      def find(hashid)
        if hashid.is_a? String
          super decode_id(hashid)
        else
          super hashid
        end
      end
    end
  end
end

ActiveRecord::Base.send :include, Hashid::Rails