--- /dev/null
+# The TimeZone class serves as a wrapper around TZInfo::Timezone instances. It allows us to do the following:
+#
+# * Limit the set of zones provided by TZInfo to a meaningful subset of 142 zones.
+# * Retrieve and display zones with a friendlier name (e.g., "Eastern Time (US & Canada)" instead of "America/New_York").
+# * Lazily load TZInfo::Timezone instances only when they're needed.
+# * Create ActiveSupport::TimeWithZone instances via TimeZone's +local+, +parse+, +at+ and +now+ methods.
+#
+# If you set <tt>config.time_zone</tt> in the Rails Initializer, you can access this TimeZone object via <tt>Time.zone</tt>:
+#
+# # environment.rb:
+# Rails::Initializer.run do |config|
+# config.time_zone = "Eastern Time (US & Canada)"
+# end
+#
+# Time.zone # => #<TimeZone:0x514834...>
+# Time.zone.name # => "Eastern Time (US & Canada)"
+# Time.zone.now # => Sun, 18 May 2008 14:30:44 EDT -04:00
+#
+# The version of TZInfo bundled with Active Support only includes the definitions necessary to support the zones
+# defined by the TimeZone class. If you need to use zones that aren't defined by TimeZone, you'll need to install the TZInfo gem
+# (if a recent version of the gem is installed locally, this will be used instead of the bundled version.)
+module ActiveSupport
+ class TimeZone
+ unless const_defined?(:MAPPING)
+ # Keys are Rails TimeZone names, values are TZInfo identifiers
+ 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/Argentina/San_Juan",
+ "Greenland" => "America/Godthab",
+ "Mid-Atlantic" => "Atlantic/South_Georgia",
+ "Azores" => "Atlantic/Azores",
+ "Cape Verde Is." => "Atlantic/Cape_Verde",
+ "Dublin" => "Europe/Dublin",
+ "Edinburgh" => "Europe/Dublin",
+ "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",
+ "Kyev" => "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/Katmandu",
+ "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 }
+ MAPPING.freeze
+ end
+
+ include Comparable
+ attr_reader :name
+
+ # 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).
+ def initialize(name, utc_offset, tzinfo = nil)
+ @name = name
+ @utc_offset = utc_offset
+ @tzinfo = tzinfo
+ end
+
+ def utc_offset
+ @utc_offset ||= tzinfo.current_period.utc_offset
+ end
+
+ # Returns the offset of this time zone as a formatted string, of the
+ # format "+HH:MM".
+ def formatted_offset(colon=true, alternate_utc_string = nil)
+ utc_offset == 0 && alternate_utc_string || utc_offset.to_utc_offset_s(colon)
+ end
+
+ # Compare this time zone to the parameter. The two are comapred first on
+ # their offsets, and then by name.
+ 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.
+ def =~(re)
+ return true if name =~ re || MAPPING[name] =~ re
+ end
+
+ # Returns a textual representation of this time zone.
+ def to_s
+ "(GMT#{formatted_offset}) #{name}"
+ 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
+ def local(*args)
+ time = Time.utc_time(*args)
+ ActiveSupport::TimeWithZone.new(nil, self, time)
+ 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
+ def at(secs)
+ utc = Time.at(secs).utc rescue DateTime.civil(1970).since(secs)
+ 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 TimeZone#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
+ 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
+
+ # 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
+ def now
+ Time.now.utc.in_time_zone(self)
+ end
+
+ # Return the current date in this time zone.
+ def today
+ tzinfo.now.to_date
+ 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.
+ def utc_to_local(time)
+ tzinfo.utc_to_local(time)
+ end
+
+ # Adjust the given time to the simultaneous time in UTC. Returns a Time.utc() instance.
+ def local_to_utc(time, dst=true)
+ tzinfo.local_to_utc(time, dst)
+ end
+
+ # Available so that TimeZone instances respond like TZInfo::Timezone instances
+ def period_for_utc(time)
+ tzinfo.period_for_utc(time)
+ end
+
+ # Available so that TimeZone instances respond like TZInfo::Timezone instances
+ def period_for_local(time, dst=true)
+ tzinfo.period_for_local(time, dst)
+ end
+
+ # TODO: Preload instead of lazy load for thread safety
+ def tzinfo
+ @tzinfo ||= TZInfo::Timezone.get(MAPPING[name])
+ end
+
+ unless const_defined?(:ZONES)
+ ZONES = []
+ ZONES_MAP = {}
+ [[-39_600, "International Date Line West", "Midway Island", "Samoa" ],
+ [-36_000, "Hawaii" ],
+ [-32_400, "Alaska" ],
+ [-28_800, "Pacific Time (US & Canada)", "Tijuana" ],
+ [-25_200, "Mountain Time (US & Canada)", "Chihuahua", "Mazatlan",
+ "Arizona" ],
+ [-21_600, "Central Time (US & Canada)", "Saskatchewan", "Guadalajara",
+ "Mexico City", "Monterrey", "Central America" ],
+ [-18_000, "Eastern Time (US & Canada)", "Indiana (East)", "Bogota",
+ "Lima", "Quito" ],
+ [-16_200, "Caracas" ],
+ [-14_400, "Atlantic Time (Canada)", "La Paz", "Santiago" ],
+ [-12_600, "Newfoundland" ],
+ [-10_800, "Brasilia", "Buenos Aires", "Georgetown", "Greenland" ],
+ [ -7_200, "Mid-Atlantic" ],
+ [ -3_600, "Azores", "Cape Verde Is." ],
+ [ 0, "Dublin", "Edinburgh", "Lisbon", "London", "Casablanca",
+ "Monrovia", "UTC" ],
+ [ 3_600, "Belgrade", "Bratislava", "Budapest", "Ljubljana", "Prague",
+ "Sarajevo", "Skopje", "Warsaw", "Zagreb", "Brussels",
+ "Copenhagen", "Madrid", "Paris", "Amsterdam", "Berlin",
+ "Bern", "Rome", "Stockholm", "Vienna",
+ "West Central Africa" ],
+ [ 7_200, "Bucharest", "Cairo", "Helsinki", "Kyev", "Riga", "Sofia",
+ "Tallinn", "Vilnius", "Athens", "Istanbul", "Minsk",
+ "Jerusalem", "Harare", "Pretoria" ],
+ [ 10_800, "Moscow", "St. Petersburg", "Volgograd", "Kuwait", "Riyadh",
+ "Nairobi", "Baghdad" ],
+ [ 12_600, "Tehran" ],
+ [ 14_400, "Abu Dhabi", "Muscat", "Baku", "Tbilisi", "Yerevan" ],
+ [ 16_200, "Kabul" ],
+ [ 18_000, "Ekaterinburg", "Islamabad", "Karachi", "Tashkent" ],
+ [ 19_800, "Chennai", "Kolkata", "Mumbai", "New Delhi", "Sri Jayawardenepura" ],
+ [ 20_700, "Kathmandu" ],
+ [ 21_600, "Astana", "Dhaka", "Almaty",
+ "Novosibirsk" ],
+ [ 23_400, "Rangoon" ],
+ [ 25_200, "Bangkok", "Hanoi", "Jakarta", "Krasnoyarsk" ],
+ [ 28_800, "Beijing", "Chongqing", "Hong Kong", "Urumqi",
+ "Kuala Lumpur", "Singapore", "Taipei", "Perth", "Irkutsk",
+ "Ulaan Bataar" ],
+ [ 32_400, "Seoul", "Osaka", "Sapporo", "Tokyo", "Yakutsk" ],
+ [ 34_200, "Darwin", "Adelaide" ],
+ [ 36_000, "Canberra", "Melbourne", "Sydney", "Brisbane", "Hobart",
+ "Vladivostok", "Guam", "Port Moresby" ],
+ [ 39_600, "Magadan", "Solomon Is.", "New Caledonia" ],
+ [ 43_200, "Fiji", "Kamchatka", "Marshall Is.", "Auckland",
+ "Wellington" ],
+ [ 46_800, "Nuku'alofa" ]].
+ each do |offset, *places|
+ places.each do |place|
+ place.freeze
+ zone = new(place, offset)
+ ZONES << zone
+ ZONES_MAP[place] = zone
+ end
+ end
+ ZONES.sort!
+ ZONES.freeze
+ ZONES_MAP.freeze
+
+ US_ZONES = ZONES.find_all { |z| z.name =~ /US|Arizona|Indiana|Hawaii|Alaska/ }
+ US_ZONES.freeze
+ end
+
+ class << self
+ alias_method :create, :new
+
+ # 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.)
+ def new(name)
+ self[name]
+ 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.
+ def all
+ ZONES
+ end
+
+ # 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.
+ def [](arg)
+ case arg
+ when String
+ ZONES_MAP[arg]
+ 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
+
+ # A convenience method for returning a collection of TimeZone objects
+ # for time zones in the USA.
+ def us_zones
+ US_ZONES
+ end
+ end
+ end
+end
projects / depot.git / blobdiff