diff options
Diffstat (limited to 'activesupport/lib/active_support/number_helper/number_to_human_size_converter.rb')
-rw-r--r-- | activesupport/lib/active_support/number_helper/number_to_human_size_converter.rb | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/number_helper/number_to_human_size_converter.rb b/activesupport/lib/active_support/number_helper/number_to_human_size_converter.rb new file mode 100644 index 0000000000..91262fa656 --- /dev/null +++ b/activesupport/lib/active_support/number_helper/number_to_human_size_converter.rb @@ -0,0 +1,61 @@ +# frozen_string_literal: true + +require "active_support/number_helper/number_converter" + +module ActiveSupport + module NumberHelper + class NumberToHumanSizeConverter < NumberConverter #:nodoc: + STORAGE_UNITS = [:byte, :kb, :mb, :gb, :tb, :pb, :eb] + + self.namespace = :human + self.validate_float = true + + def convert + @number = Float(number) + + # for backwards compatibility with those that didn't add strip_insignificant_zeros to their locale files + unless options.key?(:strip_insignificant_zeros) + options[:strip_insignificant_zeros] = true + end + + if smaller_than_base? + number_to_format = number.to_i.to_s + else + human_size = number / (base**exponent) + number_to_format = NumberToRoundedConverter.convert(human_size, options) + end + conversion_format.gsub("%n", number_to_format).gsub("%u", unit) + end + + private + + def conversion_format + translate_number_value_with_default("human.storage_units.format", locale: options[:locale], raise: true) + end + + def unit + translate_number_value_with_default(storage_unit_key, locale: options[:locale], count: number.to_i, raise: true) + end + + def storage_unit_key + key_end = smaller_than_base? ? "byte" : STORAGE_UNITS[exponent] + "human.storage_units.units.#{key_end}" + end + + def exponent + max = STORAGE_UNITS.size - 1 + exp = (Math.log(number) / Math.log(base)).to_i + exp = max if exp > max # avoid overflow for the highest unit + exp + end + + def smaller_than_base? + number.to_i < base + end + + def base + 1024 + end + end + end +end |