require 'active_support/core_ext/big_decimal/conversions' require 'active_support/core_ext/object/blank' require 'active_support/core_ext/hash/keys' require 'active_support/i18n' module ActiveSupport module NumberHelper extend self DEFAULTS = { # Used in number_to_delimited # These are also the defaults for 'currency', 'percentage', 'precision', and 'human' format: { # Sets the separator between the units, for more precision (e.g. 1.0 / 2.0 == 0.5) separator: ".", # Delimits thousands (e.g. 1,000,000 is a million) (always in groups of three) delimiter: ",", # Number of decimals, behind the separator (the number 1 with a precision of 2 gives: 1.00) precision: 3, # If set to true, precision will mean the number of significant digits instead # of the number of decimal digits (1234 with precision 2 becomes 1200, 1.23543 becomes 1.2) significant: false, # If set, the zeros after the decimal separator will always be stripped (eg.: 1.200 will be 1.2) strip_insignificant_zeros: false }, # Used in number_to_currency currency: { format: { format: "%u%n", negative_format: "-%u%n", unit: "$", # These five are to override number.format and are optional separator: ".", delimiter: ",", precision: 2, significant: false, strip_insignificant_zeros: false } }, # Used in number_to_percentage percentage: { format: { delimiter: "", format: "%n%" } }, # Used in number_to_rounded precision: { format: { delimiter: "" } }, # Used in number_to_human_size and number_to_human human: { format: { # These five are to override number.format and are optional delimiter: "", precision: 3, significant: true, strip_insignificant_zeros: true }, # Used in number_to_human_size storage_units: { # Storage units output formatting. # %u is the storage unit, %n is the number (default: 2 MB) format: "%n %u", units: { byte: "Bytes", kb: "KB", mb: "MB", gb: "GB", tb: "TB" } }, # Used in number_to_human decimal_units: { format: "%n %u", # Decimal units output formatting # By default we will only quantify some of the exponents # but the commented ones might be defined or overridden # by the user. units: { # femto: Quadrillionth # pico: Trillionth # nano: Billionth # micro: Millionth # mili: Thousandth # centi: Hundredth # deci: Tenth unit: "", # ten: # one: Ten # other: Tens # hundred: Hundred thousand: "Thousand", million: "Million", billion: "Billion", trillion: "Trillion", quadrillion: "Quadrillion" } } } } DECIMAL_UNITS = { 0 => :unit, 1 => :ten, 2 => :hundred, 3 => :thousand, 6 => :million, 9 => :billion, 12 => :trillion, 15 => :quadrillion, -1 => :deci, -2 => :centi, -3 => :mili, -6 => :micro, -9 => :nano, -12 => :pico, -15 => :femto } STORAGE_UNITS = [:byte, :kb, :mb, :gb, :tb] # Formats a +number+ into a US phone number (e.g., (555) # 123-9876). You can customize the format in the +options+ hash. # # ==== Options # # * :area_code - Adds parentheses around the area code. # * :delimiter - Specifies the delimiter to use # (defaults to "-"). # * :extension - Specifies an extension to add to the # end of the generated number. # * :country_code - Sets the country code for the phone # number. # ==== Examples # # number_to_phone(5551234) # => 555-1234 # number_to_phone('5551234') # => 555-1234 # number_to_phone(1235551234) # => 123-555-1234 # number_to_phone(1235551234, area_code: true) # => (123) 555-1234 # number_to_phone(1235551234, delimiter: ' ') # => 123 555 1234 # number_to_phone(1235551234, area_code: true, extension: 555) # => (123) 555-1234 x 555 # number_to_phone(1235551234, country_code: 1) # => +1-123-555-1234 # number_to_phone('123a456') # => 123a456 # # number_to_phone(1235551234, country_code: 1, extension: 1343, delimiter: '.') # # => +1.123.555.1234 x 1343 def number_to_phone(number, options = {}) return unless number options = options.symbolize_keys number = number.to_s.strip area_code = options[:area_code] delimiter = options[:delimiter] || "-" extension = options[:extension] country_code = options[:country_code] if area_code number.gsub!(/(\d{1,3})(\d{3})(\d{4}$)/,"(\\1) \\2#{delimiter}\\3") else number.gsub!(/(\d{0,3})(\d{3})(\d{4})$/,"\\1#{delimiter}\\2#{delimiter}\\3") number.slice!(0, 1) if number.start_with?(delimiter) && !delimiter.blank? end str = '' str << "+#{country_code}#{delimiter}" unless country_code.blank? str << number str << " x #{extension}" unless extension.blank? str end # Formats a +number+ into a currency string (e.g., $13.65). You # can customize the format in the +options+ hash. # # ==== Options # # * :locale - Sets the locale to be used for formatting # (defaults to current locale). # * :precision - Sets the level of precision (defaults # to 2). # * :unit - Sets the denomination of the currency # (defaults to "$"). # * :separator - Sets the separator between the units # (defaults to "."). # * :delimiter - Sets the thousands delimiter (defaults # to ","). # * :format - Sets the format for non-negative numbers # (defaults to "%u%n"). Fields are %u for the # currency, and %n for the number. # * :negative_format - Sets the format for negative # numbers (defaults to prepending an hyphen to the formatted # number given by :format). Accepts the same fields # than :format, except %n is here the # absolute value of the number. # # ==== Examples # # number_to_currency(1234567890.50) # => $1,234,567,890.50 # number_to_currency(1234567890.506) # => $1,234,567,890.51 # number_to_currency(1234567890.506, precision: 3) # => $1,234,567,890.506 # number_to_currency(1234567890.506, locale: :fr) # => 1 234 567 890,51 € # number_to_currency('123a456') # => $123a456 # # number_to_currency(-1234567890.50, negative_format: '(%u%n)') # # => ($1,234,567,890.50) # number_to_currency(1234567890.50, unit: '£', separator: ',', delimiter: '') # # => £1234567890,50 # number_to_currency(1234567890.50, unit: '£', separator: ',', delimiter: '', format: '%n %u') # # => 1234567890,50 £ def number_to_currency(number, options = {}) return unless number options = options.symbolize_keys currency = i18n_format_options(options[:locale], :currency) currency[:negative_format] ||= "-" + currency[:format] if currency[:format] defaults = default_format_options(:currency).merge!(currency) defaults[:negative_format] = "-" + options[:format] if options[:format] options = defaults.merge!(options) unit = options.delete(:unit) format = options.delete(:format) if number.to_f.phase != 0 format = options.delete(:negative_format) number = number.respond_to?("abs") ? number.abs : number.sub(/^-/, '') end format.gsub('%n', self.number_to_rounded(number, options)).gsub('%u', unit) end # Formats a +number+ as a percentage string (e.g., 65%). You can # customize the format in the +options+ hash. # # ==== Options # # * :locale - Sets the locale to be used for formatting # (defaults to current locale). # * :precision - Sets the precision of the number # (defaults to 3). # * :significant - If +true+, precision will be the # # of significant_digits. If +false+, the # of fractional # digits (defaults to +false+). # * :separator - Sets the separator between the # fractional and integer digits (defaults to "."). # * :delimiter - Sets the thousands delimiter (defaults # to ""). # * :strip_insignificant_zeros - If +true+ removes # insignificant zeros after the decimal separator (defaults to # +false+). # * :format - Specifies the format of the percentage # string The number field is %n (defaults to "%n%"). # # ==== Examples # # number_to_percentage(100) # => 100.000% # number_to_percentage('98') # => 98.000% # number_to_percentage(100, precision: 0) # => 100% # number_to_percentage(1000, delimiter: '.', separator: ,') # => 1.000,000% # number_to_percentage(302.24398923423, precision: 5) # => 302.24399% # number_to_percentage(1000, locale: :fr) # => 1 000,000% # number_to_percentage('98a') # => 98a% # number_to_percentage(100, format: '%n %') # => 100 % def number_to_percentage(number, options = {}) return unless number options = options.symbolize_keys defaults = format_options(options[:locale], :percentage) options = defaults.merge!(options) format = options[:format] || "%n%" format.gsub('%n', self.number_to_rounded(number, options)) end # Formats a +number+ with grouped thousands using +delimiter+ # (e.g., 12,324). You can customize the format in the +options+ # hash. # # ==== Options # # * :locale - Sets the locale to be used for formatting # (defaults to current locale). # * :delimiter - Sets the thousands delimiter (defaults # to ","). # * :separator - Sets the separator between the # fractional and integer digits (defaults to "."). # # ==== Examples # # number_to_delimited(12345678) # => 12,345,678 # number_to_delimited('123456') # => 123,456 # number_to_delimited(12345678.05) # => 12,345,678.05 # number_to_delimited(12345678, delimiter: '.') # => 12.345.678 # number_to_delimited(12345678, delimiter: ',') # => 12,345,678 # number_to_delimited(12345678.05, separator: ' ') # => 12,345,678 05 # number_to_delimited(12345678.05, locale: :fr) # => 12 345 678,05 # number_to_delimited('112a') # => 112a # number_to_delimited(98765432.98, delimiter: ' ', separator: ',') # # => 98 765 432,98 def number_to_delimited(number, options = {}) options = options.symbolize_keys return number unless valid_float?(number) options = format_options(options[:locale]).merge!(options) parts = number.to_s.to_str.split('.') parts[0].gsub!(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1#{options[:delimiter]}") parts.join(options[:separator]) end # Formats a +number+ with the specified level of # :precision (e.g., 112.32 has a precision of 2 if # +:significant+ is +false+, and 5 if +:significant+ is +true+). # You can customize the format in the +options+ hash. # # ==== Options # # * :locale - Sets the locale to be used for formatting # (defaults to current locale). # * :precision - Sets the precision of the number # (defaults to 3). # * :significant - If +true+, precision will be the # # of significant_digits. If +false+, the # of fractional # digits (defaults to +false+). # * :separator - Sets the separator between the # fractional and integer digits (defaults to "."). # * :delimiter - Sets the thousands delimiter (defaults # to ""). # * :strip_insignificant_zeros - If +true+ removes # insignificant zeros after the decimal separator (defaults to # +false+). # # ==== Examples # # number_to_rounded(111.2345) # => 111.235 # number_to_rounded(111.2345, precision: 2) # => 111.23 # number_to_rounded(13, precision: 5) # => 13.00000 # number_to_rounded(389.32314, precision: 0) # => 389 # number_to_rounded(111.2345, significant: true) # => 111 # number_to_rounded(111.2345, precision: 1, significant: true) # => 100 # number_to_rounded(13, precision: 5, significant: true) # => 13.000 # number_to_rounded(111.234, locale: :fr) # => 111,234 # # number_to_rounded(13, precision: 5, significant: true, strip_insignificant_zeros: true) # # => 13 # # number_to_rounded(389.32314, precision: 4, significant: true) # => 389.3 # number_to_rounded(1111.2345, precision: 2, separator: ',', delimiter: '.') # # => 1.111,23 def number_to_rounded(number, options = {}) return number unless valid_float?(number) number = Float(number) options = options.symbolize_keys defaults = format_options(options[:locale], :precision) options = defaults.merge!(options) precision = options.delete :precision significant = options.delete :significant strip_insignificant_zeros = options.delete :strip_insignificant_zeros if significant && precision > 0 if number == 0 digits, rounded_number = 1, 0 else digits = (Math.log10(number.abs) + 1).floor rounded_number = (BigDecimal.new(number.to_s) / BigDecimal.new((10 ** (digits - precision)).to_f.to_s)).round.to_f * 10 ** (digits - precision) digits = (Math.log10(rounded_number.abs) + 1).floor # After rounding, the number of digits may have changed end precision -= digits precision = 0 if precision < 0 # don't let it be negative else rounded_number = BigDecimal.new(number.to_s).round(precision).to_f rounded_number = rounded_number.abs if rounded_number.zero? # prevent showing negative zeros end formatted_number = self.number_to_delimited("%01.#{precision}f" % rounded_number, options) if strip_insignificant_zeros escaped_separator = Regexp.escape(options[:separator]) formatted_number.sub(/(#{escaped_separator})(\d*[1-9])?0+\z/, '\1\2').sub(/#{escaped_separator}\z/, '') else formatted_number end end # Formats the bytes in +number+ into a more understandable # representation (e.g., giving it 1500 yields 1.5 KB). This # method is useful for reporting file sizes to users. You can # customize the format in the +options+ hash. # # See number_to_human if you want to pretty-print a # generic number. # # ==== Options # # * :locale - Sets the locale to be used for formatting # (defaults to current locale). # * :precision - Sets the precision of the number # (defaults to 3). # * :significant - If +true+, precision will be the # # of significant_digits. If +false+, the # of fractional # digits (defaults to +true+) # * :separator - Sets the separator between the # fractional and integer digits (defaults to "."). # * :delimiter - Sets the thousands delimiter (defaults # to ""). # * :strip_insignificant_zeros - If +true+ removes # insignificant zeros after the decimal separator (defaults to # +true+) # * :prefix - If +:si+ formats the number using the SI # prefix (defaults to :binary) # # ==== Examples # # number_to_human_size(123) # => 123 Bytes # number_to_human_size(1234) # => 1.21 KB # number_to_human_size(12345) # => 12.1 KB # number_to_human_size(1234567) # => 1.18 MB # number_to_human_size(1234567890) # => 1.15 GB # number_to_human_size(1234567890123) # => 1.12 TB # number_to_human_size(1234567, precision: 2) # => 1.2 MB # number_to_human_size(483989, precision: 2) # => 470 KB # number_to_human_size(1234567, precision: 2, separator: ',') # => 1,2 MB # # Non-significant zeros after the fractional separator are stripped out by # default (set :strip_insignificant_zeros to +false+ to change that): # # number_to_human_size(1234567890123, precision: 5) # => "1.1229 TB" # number_to_human_size(524288000, precision: 5) # => "500 MB" def number_to_human_size(number, options = {}) options = options.symbolize_keys return number unless valid_float?(number) number = Float(number) defaults = format_options(options[:locale], :human) options = defaults.merge!(options) #for backwards compatibility with those that didn't add strip_insignificant_zeros to their locale files options[:strip_insignificant_zeros] = true if not options.key?(:strip_insignificant_zeros) storage_units_format = translate_number_value_with_default('human.storage_units.format', :locale => options[:locale], :raise => true) base = options[:prefix] == :si ? 1000 : 1024 if number.to_i < base unit = translate_number_value_with_default('human.storage_units.units.byte', :locale => options[:locale], :count => number.to_i, :raise => true) storage_units_format.gsub(/%n/, number.to_i.to_s).gsub(/%u/, unit) else max_exp = STORAGE_UNITS.size - 1 exponent = (Math.log(number) / Math.log(base)).to_i # Convert to base exponent = max_exp if exponent > max_exp # we need this to avoid overflow for the highest unit number /= base ** exponent unit_key = STORAGE_UNITS[exponent] unit = translate_number_value_with_default("human.storage_units.units.#{unit_key}", :locale => options[:locale], :count => number, :raise => true) formatted_number = self.number_to_rounded(number, options) storage_units_format.gsub(/%n/, formatted_number).gsub(/%u/, unit) end end # Pretty prints (formats and approximates) a number in a way it # is more readable by humans (eg.: 1200000000 becomes "1.2 # Billion"). This is useful for numbers that can get very large # (and too hard to read). # # See number_to_human_size if you want to print a file # size. # # You can also define you own unit-quantifier names if you want # to use other decimal units (eg.: 1500 becomes "1.5 # kilometers", 0.150 becomes "150 milliliters", etc). You may # define a wide range of unit quantifiers, even fractional ones # (centi, deci, mili, etc). # # ==== Options # # * :locale - Sets the locale to be used for formatting # (defaults to current locale). # * :precision - Sets the precision of the number # (defaults to 3). # * :significant - If +true+, precision will be the # # of significant_digits. If +false+, the # of fractional # digits (defaults to +true+) # * :separator - Sets the separator between the # fractional and integer digits (defaults to "."). # * :delimiter - Sets the thousands delimiter (defaults # to ""). # * :strip_insignificant_zeros - If +true+ removes # insignificant zeros after the decimal separator (defaults to # +true+) # * :units - A Hash of unit quantifier names. Or a # string containing an i18n scope where to find this hash. It # might have the following keys: # * *integers*: :unit, :ten, # *:hundred, :thousand, :million, # *:billion, :trillion, # *:quadrillion # * *fractionals*: :deci, :centi, # *:mili, :micro, :nano, # *:pico, :femto # * :format - Sets the format of the output string # (defaults to "%n %u"). The field types are: # * %u - The quantifier (ex.: 'thousand') # * %n - The number # # ==== Examples # # number_to_human(123) # => "123" # number_to_human(1234) # => "1.23 Thousand" # number_to_human(12345) # => "12.3 Thousand" # number_to_human(1234567) # => "1.23 Million" # number_to_human(1234567890) # => "1.23 Billion" # number_to_human(1234567890123) # => "1.23 Trillion" # number_to_human(1234567890123456) # => "1.23 Quadrillion" # number_to_human(1234567890123456789) # => "1230 Quadrillion" # number_to_human(489939, precision: 2) # => "490 Thousand" # number_to_human(489939, precision: 4) # => "489.9 Thousand" # number_to_human(1234567, precision: 4, # significant: false) # => "1.2346 Million" # number_to_human(1234567, precision: 1, # separator: ',', # significant: false) # => "1,2 Million" # # Non-significant zeros after the decimal separator are stripped # out by default (set :strip_insignificant_zeros to # +false+ to change that): # # number_to_human(12345012345, significant_digits: 6) # => "12.345 Billion" # number_to_human(500000000, precision: 5) # => "500 Million" # # ==== Custom Unit Quantifiers # # You can also use your own custom unit quantifiers: # number_to_human(500000, units: { unit: 'ml', thousand: 'lt' }) # => "500 lt" # # If in your I18n locale you have: # # distance: # centi: # one: "centimeter" # other: "centimeters" # unit: # one: "meter" # other: "meters" # thousand: # one: "kilometer" # other: "kilometers" # billion: "gazillion-distance" # # Then you could do: # # number_to_human(543934, units: :distance) # => "544 kilometers" # number_to_human(54393498, units: :distance) # => "54400 kilometers" # number_to_human(54393498000, units: :distance) # => "54.4 gazillion-distance" # number_to_human(343, units: :distance, precision: 1) # => "300 meters" # number_to_human(1, units: :distance) # => "1 meter" # number_to_human(0.34, units: :distance) # => "34 centimeters" def number_to_human(number, options = {}) options = options.symbolize_keys return number unless valid_float?(number) number = Float(number) defaults = format_options(options[:locale], :human) options = defaults.merge!(options) #for backwards compatibility with those that didn't add strip_insignificant_zeros to their locale files options[:strip_insignificant_zeros] = true if not options.key?(:strip_insignificant_zeros) inverted_du = DECIMAL_UNITS.invert units = options.delete :units unit_exponents = case units when Hash units when String, Symbol I18n.translate(:"#{units}", :locale => options[:locale], :raise => true) when nil translate_number_value_with_default("human.decimal_units.units", :locale => options[:locale], :raise => true) else raise ArgumentError, ":units must be a Hash or String translation scope." end.keys.map{|e_name| inverted_du[e_name] }.sort_by{|e| -e} number_exponent = number != 0 ? Math.log10(number.abs).floor : 0 display_exponent = unit_exponents.find{ |e| number_exponent >= e } || 0 number /= 10 ** display_exponent unit = case units when Hash units[DECIMAL_UNITS[display_exponent]] || '' when String, Symbol I18n.translate(:"#{units}.#{DECIMAL_UNITS[display_exponent]}", :locale => options[:locale], :count => number.to_i) else translate_number_value_with_default("human.decimal_units.units.#{DECIMAL_UNITS[display_exponent]}", :locale => options[:locale], :count => number.to_i) end decimal_format = options[:format] || translate_number_value_with_default('human.decimal_units.format', :locale => options[:locale]) formatted_number = self.number_to_rounded(number, options) decimal_format.gsub(/%n/, formatted_number).gsub(/%u/, unit).strip end def self.private_module_and_instance_method(method_name) #:nodoc: private method_name private_class_method method_name end private_class_method :private_module_and_instance_method def format_options(locale, namespace = nil) #:nodoc: default_format_options(namespace).merge!(i18n_format_options(locale, namespace)) end private_module_and_instance_method :format_options def default_format_options(namespace = nil) #:nodoc: options = DEFAULTS[:format].dup options.merge!(DEFAULTS[namespace][:format]) if namespace options end private_module_and_instance_method :default_format_options def i18n_format_options(locale, namespace = nil) #:nodoc: options = I18n.translate(:'number.format', locale: locale, default: {}).dup if namespace options.merge!(I18n.translate(:"number.#{namespace}.format", locale: locale, default: {})) end options end private_module_and_instance_method :i18n_format_options def translate_number_value_with_default(key, i18n_options = {}) #:nodoc: default = key.split('.').reduce(DEFAULTS) { |defaults, k| defaults[k.to_sym] } I18n.translate(key, { default: default, scope: :number }.merge!(i18n_options)) end private_module_and_instance_method :translate_number_value_with_default def valid_float?(number) #:nodoc: Float(number) rescue ArgumentError, TypeError false end private_module_and_instance_method :valid_float? end end