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module ActionView
module Helpers
# Provides methods for converting a number into a formatted string that currently represents
# one of the following forms: phone number, percentage, money, or precision level.
module NumberHelper
# Formats a +number+ into a US phone number string. The +options+ can be hash used to customize the format of the output.
# The area code can be surrounded by parenthesis by setting +:area_code+ to true; default is false
# The delimiter can be set using +:delimiter+; default is "-"
# Examples:
# 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
def number_to_phone(number, options = {})
options = options.stringify_keys
area_code = options.delete("area_code") { false }
delimiter = options.delete("delimiter") { "-" }
begin
str = number.to_s
if area_code == true
str.gsub!(/([0-9]{3})([0-9]{3})([0-9]{4})/,"(\\1) \\2#{delimiter}\\3")
else
str.gsub!(/([0-9]{3})([0-9]{3})([0-9]{4})/,"\\1#{delimiter}\\2#{delimiter}\\3")
end
rescue
number
end
end
# Formates a +number+ into a currency string. The +options+ hash can be used to customize the format of the output.
# The +number+ can contain a level of precision using the +precision+ key; default is 2
# The currency type can be set using the +unit+ key; default is "$"
# The unit separator can be set using the +separator+ key; default is "."
# The delimiter can be set using the +delimiter+ key; default is ","
# Examples:
# number_to_currency(1234567890.50) => $1,234,567,890.50
# number_to_currency(1234567890.506) => $1,234,567,890.51
# number_to_currency(1234567890.50, {:unit => "£", :separator => ",", :delimiter => ""}) => £1234567890,50
def number_to_currency(number, options = {})
options = options.stringify_keys
precision, unit, separator, delimiter = options.delete("precision") { 2 }, options.delete("unit") { "$" }, options.delete("separator") { "." }, options.delete("delimiter") { "," }
begin
parts = number_with_precision(number, precision).split('.')
unit + number_with_delimiter(parts[0], delimiter) + separator + parts[1].to_s
rescue
number
end
end
# Formats a +number+ as into a percentage string. The +options+ hash can be used to customize the format of the output.
# The +number+ can contain a level of precision using the +precision+ key; default is 3
# The unit separator can be set using the +separator+ key; default is "."
# Examples:
# number_to_percentage(100) => 100.000%
# number_to_percentage(100, {:precision => 0}) => 100%
# number_to_percentage(302.0574, {:precision => 2}) => 302.06%
def number_to_percentage(number, options = {})
options = options.stringify_keys
precision, separator = options.delete("precision") { 3 }, options.delete("separator") { "." }
begin
number = number_with_precision(number, precision)
parts = number.split('.')
if parts.at(1).nil?
parts[0] + "%"
else
parts[0] + separator + parts[1].to_s + "%"
end
rescue
number
end
end
# Formats a +number+ with a +delimiter+.
# Example:
# number_with_delimiter(12345678) => 12,345,678
def number_with_delimiter(number, delimiter=",")
number.to_s.gsub(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1#{delimiter}")
end
# Returns a formatted-for-humans file size.
#
# Examples:
# human_size(123) => 123 Bytes
# human_size(1234) => 1.2 KB
# human_size(12345) => 12.1 KB
# human_size(1234567) => 1.2 MB
# human_size(1234567890) => 1.1 GB
def number_to_human_size(size)
begin
return "%d Bytes" % size if size < 1.kilobytes
return "%.1f KB" % (size/1.0.kilobytes) if size < 1.megabytes
return "%.1f MB" % (size/1.0.megabytes) if size < 1.gigabytes
return "%.1f GB" % (size/1.0.gigabytes) if size < 1.terabytes
return "%.1f TB" % (size/1.0.terabytes)
rescue
# just return nothing
end
end
alias_method :human_size, :number_to_human_size # deprecated alias
# Formats a +number+ with a level of +precision+.
# Example:
# number_with_precision(111.2345) => 111.235
def number_with_precision(number, precision=3)
sprintf("%01.#{precision}f", number)
end
end
end
end
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