require 'active_support/core_ext/big_decimal/conversions' require 'active_support/core_ext/float/rounding' require 'active_support/core_ext/object/blank' module ActionView module Helpers #:nodoc: # Provides methods for converting numbers into formatted strings. # Methods are provided for phone numbers, currency, percentage, # precision, positional notation, file size and pretty printing. # # Most methods expect a +number+ argument, and will return it # unchanged if can't be converted into a valid number. module NumberHelper # Raised when argument +number+ param given to the helpers is invalid and # the option :raise is set to +true+. class InvalidNumberError < StandardError attr_accessor :number def initialize(number) @number = number end end # 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(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(1235551234, :country_code => 1, :extension => 1343, :delimiter => ".") # => +1.123.555.1234 x 1343 def number_to_phone(number, options = {}) return nil if number.nil? begin Float(number) is_number_html_safe = true rescue ArgumentError, TypeError if options[:raise] raise InvalidNumberError, number else is_number_html_safe = number.to_s.html_safe? end end number = number.to_s.strip options = options.symbolize_keys area_code = options[:area_code] || nil delimiter = options[:delimiter] || "-" extension = options[:extension].to_s.strip || nil country_code = options[:country_code] || nil str = "" str << "+#{country_code}#{delimiter}" unless country_code.blank? str << if area_code number.gsub!(/([0-9]{1,3})([0-9]{3})([0-9]{4}$)/,"(\\1) \\2#{delimiter}\\3") else number.gsub!(/([0-9]{0,3})([0-9]{3})([0-9]{4})$/,"\\1#{delimiter}\\2#{delimiter}\\3") number.starts_with?('-') ? number.slice!(1..-1) : number end str << " x #{extension}" unless extension.blank? is_number_html_safe ? str.html_safe : str end # Formats a +number+ into a currency string (e.g., $13.65). You can customize the format # in the +options+ hash. # # ==== Options # * :precision - Sets the level of precision (defaults to 2). # * :unit - Sets the denomination of the currency (defaults to "$"). # * :separator - Sets the separator between the units (defaults to "."). # * :delimiter - Sets the thousands delimiter (defaults to ","). # * :format - Sets the format of the output string (defaults to "%u%n"). The field types are: # # %u The currency unit # %n 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(1234567890.50, :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 nil if number.nil? options.symbolize_keys! defaults = I18n.translate(:'number.format', :locale => options[:locale], :default => {}) currency = I18n.translate(:'number.currency.format', :locale => options[:locale], :default => {}) defaults = defaults.merge(currency) options = options.reverse_merge(defaults) unit = options.delete(:unit) format = options.delete(:format) begin value = number_with_precision(number, options.merge(:raise => true)) format.gsub(/%n/, value).gsub(/%u/, unit).html_safe rescue InvalidNumberError => e if options[:raise] raise else formatted_number = format.gsub(/%n/, e.number).gsub(/%u/, unit) e.number.to_s.html_safe? ? formatted_number.html_safe : formatted_number end end end # Formats a +number+ as a percentage string (e.g., 65%). You can customize the # format in the +options+ hash. # # ==== Options # * :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_percentage(100) # => 100.000% # 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% def number_to_percentage(number, options = {}) return nil if number.nil? options.symbolize_keys! defaults = I18n.translate(:'number.format', :locale => options[:locale], :default => {}) percentage = I18n.translate(:'number.percentage.format', :locale => options[:locale], :default => {}) defaults = defaults.merge(percentage) options = options.reverse_merge(defaults) begin "#{number_with_precision(number, options.merge(:raise => true))}%".html_safe rescue InvalidNumberError => e if options[:raise] raise else e.number.to_s.html_safe? ? "#{e.number}%".html_safe : "#{e.number}%" end end end # Formats a +number+ with grouped thousands using +delimiter+ (e.g., 12,324). You can # customize the format in the +options+ hash. # # ==== Options # * :delimiter - Sets the thousands delimiter (defaults to ","). # * :separator - Sets the separator between the fractional and integer digits (defaults to "."). # # ==== Examples # number_with_delimiter(12345678) # => 12,345,678 # number_with_delimiter(12345678.05) # => 12,345,678.05 # number_with_delimiter(12345678, :delimiter => ".") # => 12.345.678 # number_with_delimiter(12345678, :separator => ",") # => 12,345,678 # number_with_delimiter(98765432.98, :delimiter => " ", :separator => ",") # # => 98 765 432,98 # # You can still use number_with_delimiter with the old API that accepts the # +delimiter+ as its optional second and the +separator+ as its # optional third parameter: # number_with_delimiter(12345678, " ") # => 12 345 678 # number_with_delimiter(12345678.05, ".", ",") # => 12.345.678,05 def number_with_delimiter(number, *args) options = args.extract_options! options.symbolize_keys! begin Float(number) rescue ArgumentError, TypeError if options[:raise] raise InvalidNumberError, number else return number end end defaults = I18n.translate(:'number.format', :locale => options[:locale], :default => {}) unless args.empty? ActiveSupport::Deprecation.warn('number_with_delimiter takes an option hash ' + 'instead of separate delimiter and precision arguments.', caller) options[:delimiter] ||= args[0] if args[0] options[:separator] ||= args[1] if args[1] end options = options.reverse_merge(defaults) parts = number.to_s.split('.') parts[0].gsub!(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1#{options[:delimiter]}") parts.join(options[:separator]).html_safe 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 # * :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_with_precision(111.2345) # => 111.235 # number_with_precision(111.2345, :precision => 2) # => 111.23 # number_with_precision(13, :precision => 5) # => 13.00000 # number_with_precision(389.32314, :precision => 0) # => 389 # number_with_precision(111.2345, :significant => true) # => 111 # number_with_precision(111.2345, :precision => 1, :significant => true) # => 100 # number_with_precision(13, :precision => 5, :significant => true) # => 13.000 # number_with_precision(13, :precision => 5, :significant => true, strip_insignificant_zeros => true) # # => 13 # number_with_precision(389.32314, :precision => 4, :significant => true) # => 389.3 # number_with_precision(1111.2345, :precision => 2, :separator => ',', :delimiter => '.') # # => 1.111,23 # # You can still use number_with_precision with the old API that accepts the # +precision+ as its optional second parameter: # number_with_precision(111.2345, 2) # => 111.23 def number_with_precision(number, *args) options = args.extract_options! options.symbolize_keys! number = begin Float(number) rescue ArgumentError, TypeError if options[:raise] raise InvalidNumberError, number else return number end end defaults = I18n.translate(:'number.format', :locale => options[:locale], :default => {}) precision_defaults = I18n.translate(:'number.precision.format', :locale => options[:locale], :default => {}) defaults = defaults.merge(precision_defaults) #Backwards compatibility unless args.empty? ActiveSupport::Deprecation.warn('number_with_precision takes an option hash ' + 'instead of a separate precision argument.', caller) options[:precision] ||= args[0] if args[0] end options = options.reverse_merge(defaults) # Allow the user to unset default values: Eg.: :significant => false precision = options.delete :precision significant = options.delete :significant strip_insignificant_zeros = options.delete :strip_insignificant_zeros if significant and precision > 0 if number == 0 digits, rounded_number = 1, 0 else digits = (Math.log10(number) + 1).floor rounded_number = BigDecimal.new((number / 10 ** (digits - precision)).to_s).round.to_f * 10 ** (digits - precision) end precision = precision - digits precision = precision > 0 ? precision : 0 #don't let it be negative else rounded_number = BigDecimal.new((number * (10 ** precision)).to_s).round.to_f / 10 ** precision end formatted_number = number_with_delimiter("%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/, '').html_safe else formatted_number end end STORAGE_UNITS = [:byte, :kb, :mb, :gb, :tb].freeze # 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 # * :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+) # ==== 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 # # Unsignificant 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" # # You can still use number_to_human_size with the old API that accepts the # +precision+ as its optional second parameter: # number_to_human_size(1234567, 1) # => 1 MB # number_to_human_size(483989, 2) # => 470 KB def number_to_human_size(number, *args) options = args.extract_options! options.symbolize_keys! number = begin Float(number) rescue ArgumentError, TypeError if options[:raise] raise InvalidNumberError, number else return number end end defaults = I18n.translate(:'number.format', :locale => options[:locale], :default => {}) human = I18n.translate(:'number.human.format', :locale => options[:locale], :default => {}) defaults = defaults.merge(human) unless args.empty? ActiveSupport::Deprecation.warn('number_to_human_size takes an option hash ' + 'instead of a separate precision argument.', caller) options[:precision] ||= args[0] if args[0] end options = options.reverse_merge(defaults) #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 = I18n.translate(:'number.human.storage_units.format', :locale => options[:locale], :raise => true) if number.to_i < 1024 unit = I18n.translate(:'number.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).html_safe else max_exp = STORAGE_UNITS.size - 1 exponent = (Math.log(number) / Math.log(1024)).to_i # Convert to base 1024 exponent = max_exp if exponent > max_exp # we need this to avoid overflow for the highest unit number /= 1024 ** exponent unit_key = STORAGE_UNITS[exponent] unit = I18n.translate(:"number.human.storage_units.units.#{unit_key}", :locale => options[:locale], :count => number, :raise => true) formatted_number = number_with_precision(number, options) storage_units_format.gsub(/%n/, formatted_number).gsub(/%u/, unit).html_safe end end 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}.freeze # 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 mililiters", etc). You may define # a wide range of unit quantifiers, even fractional ones (centi, deci, mili, etc). # # ==== Options # * :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" # # Unsignificant 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: "gazilion-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 gazilion-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.symbolize_keys! number = begin Float(number) rescue ArgumentError, TypeError if options[:raise] raise InvalidNumberError, number else return number end end defaults = I18n.translate(:'number.format', :locale => options[:locale], :default => {}) human = I18n.translate(:'number.human.format', :locale => options[:locale], :default => {}) defaults = defaults.merge(human) options = options.reverse_merge(defaults) #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) units = options.delete :units unit_exponents = case units when Hash units when String, Symbol I18n.translate(:"#{units}", :locale => options[:locale], :raise => true) when nil I18n.translate(:"number.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| DECIMAL_UNITS.invert[e_name] }.sort_by{|e| -e} number_exponent = Math.log10(number).floor display_exponent = unit_exponents.find{|e| number_exponent >= e } 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 I18n.translate(:"number.human.decimal_units.units.#{DECIMAL_UNITS[display_exponent]}", :locale => options[:locale], :count => number.to_i) end decimal_format = options[:format] || I18n.translate(:'number.human.decimal_units.format', :locale => options[:locale], :default => "%n %u") formatted_number = number_with_precision(number, options) decimal_format.gsub(/%n/, formatted_number).gsub(/%u/, unit).strip.html_safe end end end end