module Thumbo
  class AbstractStorage
    def read filename
      raise NotImplementedError
    end

    def write filename, blob
      raise NotImplementedError
    end

    def write_file filename, file
      raise NotImplementedError
    end

    def delete filename
      raise NotImplementedError
    end

    def paths filename
      raise NotImplementedError
    end

    def exist? filename
      raise NotImplementedError
    end

    protected
    def raise_file_not_found filename
      raise Thumbo::FileNotFound.new(filename)
    end
  end
end