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MAPPING | = | { "International Date Line West" => "Pacific/Midway", "Midway Island" => "Pacific/Midway", "Samoa" => "Pacific/Pago_Pago", "Hawaii" => "Pacific/Honolulu", "Alaska" => "America/Juneau", "Pacific Time (US & Canada)" => "America/Los_Angeles", "Tijuana" => "America/Tijuana", "Mountain Time (US & Canada)" => "America/Denver", "Arizona" => "America/Phoenix", "Chihuahua" => "America/Chihuahua", "Mazatlan" => "America/Mazatlan", "Central Time (US & Canada)" => "America/Chicago", "Saskatchewan" => "America/Regina", "Guadalajara" => "America/Mexico_City", "Mexico City" => "America/Mexico_City", "Monterrey" => "America/Monterrey", "Central America" => "America/Guatemala", "Eastern Time (US & Canada)" => "America/New_York", "Indiana (East)" => "America/Indiana/Indianapolis", "Bogota" => "America/Bogota", "Lima" => "America/Lima", "Quito" => "America/Lima", "Atlantic Time (Canada)" => "America/Halifax", "Caracas" => "America/Caracas", "La Paz" => "America/La_Paz", "Santiago" => "America/Santiago", "Newfoundland" => "America/St_Johns", "Brasilia" => "America/Sao_Paulo", "Buenos Aires" => "America/Argentina/Buenos_Aires", "Georgetown" => "America/Guyana", "Greenland" => "America/Godthab", "Mid-Atlantic" => "Atlantic/South_Georgia", "Azores" => "Atlantic/Azores", "Cape Verde Is." => "Atlantic/Cape_Verde", "Dublin" => "Europe/Dublin", "Edinburgh" => "Europe/London", "Lisbon" => "Europe/Lisbon", "London" => "Europe/London", "Casablanca" => "Africa/Casablanca", "Monrovia" => "Africa/Monrovia", "UTC" => "Etc/UTC", "Belgrade" => "Europe/Belgrade", "Bratislava" => "Europe/Bratislava", "Budapest" => "Europe/Budapest", "Ljubljana" => "Europe/Ljubljana", "Prague" => "Europe/Prague", "Sarajevo" => "Europe/Sarajevo", "Skopje" => "Europe/Skopje", "Warsaw" => "Europe/Warsaw", "Zagreb" => "Europe/Zagreb", "Brussels" => "Europe/Brussels", "Copenhagen" => "Europe/Copenhagen", "Madrid" => "Europe/Madrid", "Paris" => "Europe/Paris", "Amsterdam" => "Europe/Amsterdam", "Berlin" => "Europe/Berlin", "Bern" => "Europe/Berlin", "Rome" => "Europe/Rome", "Stockholm" => "Europe/Stockholm", "Vienna" => "Europe/Vienna", "West Central Africa" => "Africa/Algiers", "Bucharest" => "Europe/Bucharest", "Cairo" => "Africa/Cairo", "Helsinki" => "Europe/Helsinki", "Kyiv" => "Europe/Kiev", "Riga" => "Europe/Riga", "Sofia" => "Europe/Sofia", "Tallinn" => "Europe/Tallinn", "Vilnius" => "Europe/Vilnius", "Athens" => "Europe/Athens", "Istanbul" => "Europe/Istanbul", "Minsk" => "Europe/Minsk", "Jerusalem" => "Asia/Jerusalem", "Harare" => "Africa/Harare", "Pretoria" => "Africa/Johannesburg", "Moscow" => "Europe/Moscow", "St. Petersburg" => "Europe/Moscow", "Volgograd" => "Europe/Moscow", "Kuwait" => "Asia/Kuwait", "Riyadh" => "Asia/Riyadh", "Nairobi" => "Africa/Nairobi", "Baghdad" => "Asia/Baghdad", "Tehran" => "Asia/Tehran", "Abu Dhabi" => "Asia/Muscat", "Muscat" => "Asia/Muscat", "Baku" => "Asia/Baku", "Tbilisi" => "Asia/Tbilisi", "Yerevan" => "Asia/Yerevan", "Kabul" => "Asia/Kabul", "Ekaterinburg" => "Asia/Yekaterinburg", "Islamabad" => "Asia/Karachi", "Karachi" => "Asia/Karachi", "Tashkent" => "Asia/Tashkent", "Chennai" => "Asia/Kolkata", "Kolkata" => "Asia/Kolkata", "Mumbai" => "Asia/Kolkata", "New Delhi" => "Asia/Kolkata", "Kathmandu" => "Asia/Kathmandu", "Astana" => "Asia/Dhaka", "Dhaka" => "Asia/Dhaka", "Sri Jayawardenepura" => "Asia/Colombo", "Almaty" => "Asia/Almaty", "Novosibirsk" => "Asia/Novosibirsk", "Rangoon" => "Asia/Rangoon", "Bangkok" => "Asia/Bangkok", "Hanoi" => "Asia/Bangkok", "Jakarta" => "Asia/Jakarta", "Krasnoyarsk" => "Asia/Krasnoyarsk", "Beijing" => "Asia/Shanghai", "Chongqing" => "Asia/Chongqing", "Hong Kong" => "Asia/Hong_Kong", "Urumqi" => "Asia/Urumqi", "Kuala Lumpur" => "Asia/Kuala_Lumpur", "Singapore" => "Asia/Singapore", "Taipei" => "Asia/Taipei", "Perth" => "Australia/Perth", "Irkutsk" => "Asia/Irkutsk", "Ulaan Bataar" => "Asia/Ulaanbaatar", "Seoul" => "Asia/Seoul", "Osaka" => "Asia/Tokyo", "Sapporo" => "Asia/Tokyo", "Tokyo" => "Asia/Tokyo", "Yakutsk" => "Asia/Yakutsk", "Darwin" => "Australia/Darwin", "Adelaide" => "Australia/Adelaide", "Canberra" => "Australia/Melbourne", "Melbourne" => "Australia/Melbourne", "Sydney" => "Australia/Sydney", "Brisbane" => "Australia/Brisbane", "Hobart" => "Australia/Hobart", "Vladivostok" => "Asia/Vladivostok", "Guam" => "Pacific/Guam", "Port Moresby" => "Pacific/Port_Moresby", "Magadan" => "Asia/Magadan", "Solomon Is." => "Asia/Magadan", "New Caledonia" => "Pacific/Noumea", "Fiji" => "Pacific/Fiji", "Kamchatka" => "Asia/Kamchatka", "Marshall Is." => "Pacific/Majuro", "Auckland" => "Pacific/Auckland", "Wellington" => "Pacific/Auckland", "Nuku'alofa" => "Pacific/Tongatapu" }.each { |name, zone| name.freeze; zone.freeze } |
Keys are Rails TimeZone names, values are TZInfo identifiers |
||
UTC_OFFSET_WITH_COLON | = | '%s%02d:%02d' |
UTC_OFFSET_WITHOUT_COLON | = | UTC_OFFSET_WITH_COLON.sub(':', '') |
[R] | name | |
[R] | tzinfo |
Locate a specific time zone object. If the argument is a string, it is
interpreted to mean the name of the timezone to locate. If it is a numeric
value it is either the hour offset, or the second offset, of the timezone
to find. (The first one with that offset will be returned.) Returns
nil
if no such time zone is known to the system.
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 351 def [](arg) case arg when String begin lazy_zones_map[arg] ||= lookup(arg).tap { |tz| tz.utc_offset } rescue TZInfo::InvalidTimezoneIdentifier nil end when Numeric, ActiveSupport::Duration arg *= 3600 if arg.abs <= 13 all.find { |z| z.utc_offset == arg.to_i } else raise ArgumentError, "invalid argument to TimeZone[]: #{arg.inspect}" end end
Return an array of all TimeZone objects. There are multiple TimeZone objects per time zone, in many cases, to make it easier for users to find their own time zone.
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 333 def all @zones ||= zones_map.values.sort end
TODO: Preload instead of lazy load for thread safety
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 315 def self.find_tzinfo(name) require 'active_support/tzinfo' unless defined?(::TZInfo) ::TZInfo::TimezoneProxy.new(MAPPING[name] || name) end
Return a TimeZone instance with the given name,
or nil
if no such TimeZone
instance exists. (This exists to support the use of this class with the
composed_of
macro.)
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 326 def new(name) self[name] end
Create a new TimeZone object with the given name and offset. The offset is the number of seconds that this time zone is offset from UTC (GMT). Seconds were chosen as the offset unit because that is the unit that Ruby uses to represent time zone offsets (see Time#utc_offset).
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 197 def initialize(name, utc_offset = nil, tzinfo = nil) self.class.send(:require_tzinfo) @name = name @utc_offset = utc_offset @tzinfo = tzinfo || TimeZone.find_tzinfo(name) @current_period = nil end
Assumes self represents an offset from UTC in seconds (as returned from Time#utc_offset) and turns this into an +HH:MM formatted string. Example:
TimeZone.seconds_to_utc_offset(-21_600) # => "-06:00"
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 181 def self.seconds_to_utc_offset(seconds, colon = true) format = colon ? UTC_OFFSET_WITH_COLON : UTC_OFFSET_WITHOUT_COLON sign = (seconds < 0 ? '-' : '+') hours = seconds.abs / 3600 minutes = (seconds.abs % 3600) / 60 format % [sign, hours, minutes] end
A convenience method for returning a collection of TimeZone objects for time zones in the USA.
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 369 def us_zones @us_zones ||= all.find_all { |z| z.name =~ /US|Arizona|Indiana|Hawaii|Alaska/ } end
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 337 def zones_map @zones_map ||= begin new_zones_names = MAPPING.keys - lazy_zones_map.keys new_zones = Hash[new_zones_names.map { |place| [place, create(place)] }] lazy_zones_map.merge(new_zones) end end
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 375 def require_tzinfo require 'tzinfo' unless defined?(::TZInfo) rescue LoadError $stderr.puts "You don't have tzinfo installed in your application. Please add it to your Gemfile and run bundle install" raise end
Compare this time zone to the parameter. The two are compared first on their offsets, and then by name.
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 223 def <=>(zone) result = (utc_offset <=> zone.utc_offset) result = (name <=> zone.name) if result == 0 result end
Compare #name and TZInfo identifier to a supplied regexp, returning true if a match is found.
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 231 def =~(re) return true if name =~ re || MAPPING[name] =~ re end
Method for creating new ActiveSupport::TimeWithZone instance in time
zone of self
from number of seconds since the Unix epoch.
Example:
Time.zone = "Hawaii" # => "Hawaii" Time.utc(2000).to_f # => 946684800.0 Time.zone.at(946684800.0) # => Fri, 31 Dec 1999 14:00:00 HST -10:00
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 254 def at(secs) utc = Time.at(secs).utc rescue DateTime.civil(1970).since(secs) utc.in_time_zone(self) end
Returns the offset of this time zone as a formatted string, of the format “+HH:MM”.
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 217 def formatted_offset(colon=true, alternate_utc_string = nil) utc_offset == 0 && alternate_utc_string || self.class.seconds_to_utc_offset(utc_offset, colon) end
Method for creating new ActiveSupport::TimeWithZone instance in time
zone of self
from given values. Example:
Time.zone = "Hawaii" # => "Hawaii" Time.zone.local(2007, 2, 1, 15, 30, 45) # => Thu, 01 Feb 2007 15:30:45 HST -10:00
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 244 def local(*args) time = Time.utc_time(*args) ActiveSupport::TimeWithZone.new(nil, self, time) end
Adjust the given time to the simultaneous time in UTC. Returns a Time.utc() instance.
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 300 def local_to_utc(time, dst=true) tzinfo.local_to_utc(time, dst) end
Returns an ActiveSupport::TimeWithZone
instance representing the current time in the time zone represented by
self
. Example:
Time.zone = 'Hawaii' # => "Hawaii" Time.zone.now # => Wed, 23 Jan 2008 20:24:27 HST -10:00
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 284 def now Time.now.utc.in_time_zone(self) end
Method for creating new ActiveSupport::TimeWithZone instance in time
zone of self
from parsed string. Example:
Time.zone = "Hawaii" # => "Hawaii" Time.zone.parse('1999-12-31 14:00:00') # => Fri, 31 Dec 1999 14:00:00 HST -10:00
If upper components are missing from the string, they are supplied from #now:
Time.zone.now # => Fri, 31 Dec 1999 14:00:00 HST -10:00 Time.zone.parse('22:30:00') # => Fri, 31 Dec 1999 22:30:00 HST -10:00
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 268 def parse(str, now=now) date_parts = Date._parse(str) return if date_parts.blank? time = Time.parse(str, now) rescue DateTime.parse(str) if date_parts[:offset].nil? ActiveSupport::TimeWithZone.new(nil, self, time) else time.in_time_zone(self) end end
Available so that TimeZone instances respond like TZInfo::Timezone instances
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 310 def period_for_local(time, dst=true) tzinfo.period_for_local(time, dst) end
Available so that TimeZone instances respond like TZInfo::Timezone instances
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 305 def period_for_utc(time) tzinfo.period_for_utc(time) end
Returns a textual representation of this time zone.
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 236 def to_s "(GMT#{formatted_offset}) #{name}" end
Return the current date in this time zone.
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 289 def today tzinfo.now.to_date end
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 206 def utc_offset if @utc_offset @utc_offset else @current_period ||= tzinfo.try(:current_period) @current_period.try(:utc_offset) end end
Adjust the given time to the simultaneous time in the time zone represented
by self
. Returns a Time.utc() instance – if you want an ActiveSupport::TimeWithZone instance, use Time#in_time_zone instead.
Source: show
# File activesupport/lib/active_support/values/time_zone.rb, line 295 def utc_to_local(time) tzinfo.utc_to_local(time) end