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rails--rails/activesupport/lib/active_support/number_helper.rb

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module ActiveSupport
module NumberHelper
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extend ActiveSupport::Autoload
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eager_autoload do
autoload :NumberConverter
autoload :NumberToRoundedConverter
autoload :NumberToDelimitedConverter
autoload :NumberToHumanConverter
autoload :NumberToHumanSizeConverter
autoload :NumberToPhoneConverter
autoload :NumberToCurrencyConverter
autoload :NumberToPercentageConverter
end
Extract ActiveSupport::NumberHelper methods to classes Due to the overall complexity of each method individually as well as the global shared private module methods, this pulls each helper into it's own converter class inheriting from a generic `NumberBuilder` class. * The `NumberBuilder` class contains the private methods needed for each helper method an eliminates the need for special definition of specialized private module methods. * The `ActiveSupport::NumberHelper::DEFAULTS` constant has been moved into the `NumberBuilder` class because the `NumberBuilder` is the only class which needs access to it. * For each of the builders, the `#convert` method is broken down to smaller parts and extracted into private methods for clarity of purpose. * Most of the mutation that once was necessary has now been eliminated. * Several of the mathematical operations for percentage, delimited, and rounded have been moved into private methods to ease readability and clarity. * Internationalization is still a bit crufty, and definitely could be improved, but it is functional and a bit easier to follow. The following helpers were extracted into their respective classes. * `#number_to_percentage` -> `NumberToPercentageConverter` * `#number_to_delimited` -> `NumberToDelimitedConverter` * `#number_to_phone` -> `NumberToPhoneConverter` * `#number_to_currency` -> `NumberToCurrencyConverter` * `#number_to_rounded` -> `NumberToRoundedConverter` * `#number_to_human_size` -> `NumberToHumanSizeConverter` * `#number_to_human` -> `NumberToHumanConverter`
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extend self
# Formats a +number+ into a phone number (US by default e.g., (555)
# 123-9876). You can customize the format in the +options+ hash.
#
# ==== Options
#
# * <tt>:area_code</tt> - Adds parentheses around the area code.
# * <tt>:delimiter</tt> - Specifies the delimiter to use
# (defaults to "-").
# * <tt>:extension</tt> - Specifies an extension to add to the
# end of the generated number.
# * <tt>:country_code</tt> - Sets the country code for the phone
# number.
# * <tt>:pattern</tt> - Specifies how the number is divided into three
# groups with the custom regexp to override the default format.
# ==== 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"
#
# number_to_phone(75561234567, pattern: /(\d{1,4})(\d{4})(\d{4})$/, area_code: true)
# # => "(755) 6123-4567"
# number_to_phone(13312345678, pattern: /(\d{3})(\d{4})(\d{4})$/))
# # => "133-1234-5678"
def number_to_phone(number, options = {})
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NumberToPhoneConverter.convert(number, options)
end
# Formats a +number+ into a currency string (e.g., $13.65). You
# can customize the format in the +options+ hash.
#
# The currency unit and number formatting of the current locale will be used
# unless otherwise specified in the provided options. No currency conversion
# is performed. If the user is given a way to change their locale, they will
# also be able to change the relative value of the currency displayed with
# this helper. If your application will ever support multiple locales, you
# may want to specify a constant <tt>:locale</tt> option or consider
# using a library capable of currency conversion.
#
# ==== Options
#
# * <tt>:locale</tt> - Sets the locale to be used for formatting
# (defaults to current locale).
# * <tt>:precision</tt> - Sets the level of precision (defaults
# to 2).
# * <tt>:unit</tt> - Sets the denomination of the currency
# (defaults to "$").
# * <tt>:separator</tt> - Sets the separator between the units
# (defaults to ".").
# * <tt>:delimiter</tt> - Sets the thousands delimiter (defaults
# to ",").
# * <tt>:format</tt> - Sets the format for non-negative numbers
# (defaults to "%u%n"). Fields are <tt>%u</tt> for the
# currency, and <tt>%n</tt> for the number.
# * <tt>:negative_format</tt> - Sets the format for negative
# numbers (defaults to prepending an hyphen to the formatted
# number given by <tt>:format</tt>). Accepts the same fields
# than <tt>:format</tt>, except <tt>%n</tt> 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: '&pound;', separator: ',', delimiter: '')
# # => "&pound;1234567890,50"
# number_to_currency(1234567890.50, unit: '&pound;', separator: ',', delimiter: '', format: '%n %u')
# # => "1234567890,50 &pound;"
def number_to_currency(number, options = {})
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NumberToCurrencyConverter.convert(number, options)
end
# Formats a +number+ as a percentage string (e.g., 65%). You can
# customize the format in the +options+ hash.
#
# ==== Options
#
# * <tt>:locale</tt> - Sets the locale to be used for formatting
# (defaults to current locale).
# * <tt>:precision</tt> - Sets the precision of the number
# (defaults to 3). Keeps the number's precision if nil.
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# * <tt>:significant</tt> - If +true+, precision will be the number
# of significant_digits. If +false+, the number of fractional
# digits (defaults to +false+).
# * <tt>:separator</tt> - Sets the separator between the
# fractional and integer digits (defaults to ".").
# * <tt>:delimiter</tt> - Sets the thousands delimiter (defaults
# to "").
# * <tt>:strip_insignificant_zeros</tt> - If +true+ removes
# insignificant zeros after the decimal separator (defaults to
# +false+).
# * <tt>:format</tt> - Specifies the format of the percentage
# string The number field is <tt>%n</tt> (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) # => "1000,000%"
# number_to_percentage(1000, precision: nil) # => "1000%"
# number_to_percentage('98a') # => "98a%"
# number_to_percentage(100, format: '%n %') # => "100.000 %"
def number_to_percentage(number, options = {})
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NumberToPercentageConverter.convert(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
#
# * <tt>:locale</tt> - Sets the locale to be used for formatting
# (defaults to current locale).
# * <tt>:delimiter</tt> - Sets the thousands delimiter (defaults
# to ",").
# * <tt>:separator</tt> - Sets the separator between the
# fractional and integer digits (defaults to ".").
# * <tt>:delimiter_pattern</tt> - Sets a custom regular expression used for
# deriving the placement of delimiter. Helpful when using currency formats
# like INR.
#
# ==== 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"
# number_to_delimited("123456.78",
# delimiter_pattern: /(\d+?)(?=(\d\d)+(\d)(?!\d))/)
# # => "1,23,456.78"
def number_to_delimited(number, options = {})
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NumberToDelimitedConverter.convert(number, options)
end
# Formats a +number+ with the specified level of
# <tt>:precision</tt> (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
#
# * <tt>:locale</tt> - Sets the locale to be used for formatting
# (defaults to current locale).
# * <tt>:precision</tt> - Sets the precision of the number
# (defaults to 3). Keeps the number's precision if nil.
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# * <tt>:significant</tt> - If +true+, precision will be the number
# of significant_digits. If +false+, the number of fractional
# digits (defaults to +false+).
# * <tt>:separator</tt> - Sets the separator between the
# fractional and integer digits (defaults to ".").
# * <tt>:delimiter</tt> - Sets the thousands delimiter (defaults
# to "").
# * <tt>:strip_insignificant_zeros</tt> - 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(13, precision: nil) # => "13"
# 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 = {})
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NumberToRoundedConverter.convert(number, options)
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 <tt>number_to_human</tt> if you want to pretty-print a
# generic number.
#
# ==== Options
#
# * <tt>:locale</tt> - Sets the locale to be used for formatting
# (defaults to current locale).
# * <tt>:precision</tt> - Sets the precision of the number
# (defaults to 3).
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# * <tt>:significant</tt> - If +true+, precision will be the number
# of significant_digits. If +false+, the number of fractional
# digits (defaults to +true+)
# * <tt>:separator</tt> - Sets the separator between the
# fractional and integer digits (defaults to ".").
# * <tt>:delimiter</tt> - Sets the thousands delimiter (defaults
# to "").
# * <tt>:strip_insignificant_zeros</tt> - 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(1234567890123456) # => "1.1 PB"
# number_to_human_size(1234567890123456789) # => "1.07 EB"
# 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"
# number_to_human_size(1234567890123, precision: 5) # => "1.1228 TB"
# number_to_human_size(524288000, precision: 5) # => "500 MB"
def number_to_human_size(number, options = {})
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NumberToHumanSizeConverter.convert(number, options)
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 <tt>number_to_human_size</tt> if you want to print a file
# size.
#
# You can also define your 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
#
# * <tt>:locale</tt> - Sets the locale to be used for formatting
# (defaults to current locale).
# * <tt>:precision</tt> - Sets the precision of the number
# (defaults to 3).
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# * <tt>:significant</tt> - If +true+, precision will be the number
# of significant_digits. If +false+, the number of fractional
# digits (defaults to +true+)
# * <tt>:separator</tt> - Sets the separator between the
# fractional and integer digits (defaults to ".").
# * <tt>:delimiter</tt> - Sets the thousands delimiter (defaults
# to "").
# * <tt>:strip_insignificant_zeros</tt> - If +true+ removes
# insignificant zeros after the decimal separator (defaults to
# +true+)
# * <tt>:units</tt> - 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*: <tt>:unit</tt>, <tt>:ten</tt>,
# <tt>:hundred</tt>, <tt>:thousand</tt>, <tt>:million</tt>,
# <tt>:billion</tt>, <tt>:trillion</tt>,
# <tt>:quadrillion</tt>
# * *fractionals*: <tt>:deci</tt>, <tt>:centi</tt>,
# <tt>:mili</tt>, <tt>:micro</tt>, <tt>:nano</tt>,
# <tt>:pico</tt>, <tt>:femto</tt>
# * <tt>:format</tt> - 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"
#
# number_to_human(500000000, precision: 5) # => "500 Million"
# number_to_human(12345012345, significant: false) # => "12.345 Billion"
#
# Non-significant zeros after the decimal separator are stripped
# out by default (set <tt>:strip_insignificant_zeros</tt> to
# +false+ to change that):
#
# number_to_human(12.00001) # => "12"
# number_to_human(12.00001, strip_insignificant_zeros: false) # => "12.0"
#
# ==== 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 = {})
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NumberToHumanConverter.convert(number, options)
end
end
end