Contents

# frozen_string_literal: true

class Serega
  class Attribute
    class CheckName
      FORMAT_ONE_CHAR = /\A[a-zA-Z0-9]\z/
      FORMAT_MANY_CHARS = /\A[a-zA-Z0-9][a-zA-Z0-9_-]*?[a-zA-Z0-9]\z/ # allow '-' and '_' in the middle

      private_constant :FORMAT_ONE_CHAR, :FORMAT_MANY_CHARS

      class << self
        #
        # Checks allowed characters.
        # Globally allowed characters: "a-z", "A-Z", "0-9".
        # Minus and low line "-", "_" also allowed except as the first or last character.
        #
        # @param name [String, Symbol] Attribute name
        #
        # @raise [Error] when name has invalid format
        # @return [void]
        #
        def call(name)
          name = name.to_s

          valid =
            case name.size
            when 0 then false
            when 1 then name.match?(FORMAT_ONE_CHAR)
            else name.match?(FORMAT_MANY_CHARS)
            end

          return if valid

          raise Error, message(name)
        end

        private

        def message(name)
          %(Invalid attribute name = #{name.inspect}. Globally allowed characters: "a-z", "A-Z", "0-9". Minus and low line "-", "_" also allowed except as the first or last character)
        end
      end
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
serega-0.1.1	lib/serega/validations/attribute/check_name.rb
serega-0.1.0	lib/serega/validations/attribute/check_name.rb