Contents

require "json"

module Kredis::TypeCasting
  class InvalidType < StandardError; end

  VALID_TYPES = %i[ string integer decimal float boolean datetime json ]

  def type_to_string(value)
    case value
    when nil
      ""
    when Integer
      value.to_s
    when BigDecimal
      value.to_d
    when Float
      value.to_s
    when TrueClass, FalseClass
      value ? "t" : "f"
    when Time, DateTime, ActiveSupport::TimeWithZone
      value.iso8601(9)
    when Hash
      JSON.dump(value)
    else
      value
    end
  end

  def string_to_type(value, type)
    raise InvalidType if type && !VALID_TYPES.include?(type)

    case type
    when nil, :string then value
    when :integer     then value.to_i
    when :decimal     then value.to_d
    when :float       then value.to_f
    when :boolean     then value == "t" ? true : false
    when :datetime    then Time.iso8601(value)
    when :json        then JSON.load(value)
    end if value.present?
  end

  def types_to_strings(values)
    Array(values).flatten.map { |value| type_to_string(value) }
  end

  def strings_to_types(values, type)
    Array(values).flatten.map { |value| string_to_type(value, type) }
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
kredis-0.3.0	lib/kredis/type_casting.rb