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