Module: IANA_Converter

Defined in:
lib/iana_converter.rb

Overview

Better IANA Timezone Mapping

Author:

Constant Summary collapse

US_TIMEZONE_MAPPING =

The Complete IANA US Timezone list with mappings to Rails timezones.

{
  'America/New_York' => 'America/New_York',
  'America/Detroit' => 'America/New_York',
  'America/Kentucky/Louisville' => 'America/New_York',
  'America/Kentucky/Monticello' => 'America/New_York',
  'America/Indiana/Indianapolis' => 'America/New_York',
  'America/Indiana/Vincennes' => 'America/New_York',
  'America/Indiana/Winamac' => 'America/New_York',
  'America/Indiana/Marengo' => 'America/New_York',
  'America/Indiana/Petersburg' => 'America/New_York',
  'America/Indiana/Vevay' => 'America/New_York',
  'America/Chicago' => 'America/Chicago',
  'America/Indiana/Tell_City' => 'America/Chicago',
  'America/Indiana/Knox' => 'America/Chicago',
  'America/Menominee' => 'America/Chicago',
  'America/North_Dakota/Center' => 'America/Chicago',
  'America/North_Dakota/New_Salem' => 'America/Chicago',
  'America/North_Dakota/Beulah' => 'America/Chicago',
  'America/Denver' => 'America/Denver',
  'America/Boise' => 'America/Denver',
  'America/Phoenix' => 'America/Phoenix',
  'America/Los_Angeles' => 'America/Los_Angeles',
  'America/Anchorage' => 'America/Juneau',
  'America/Juneau' => 'America/Juneau',
  'America/Sitka' => 'America/Juneau',
  'America/Metlakatla' => 'America/Juneau',
  'America/Yakutat' => 'America/Juneau',
  'America/Nome' => 'America/Juneau',
  'Pacific/Honolulu' => 'Pacific/Honolulu',
  'America/Adak' => nil
}.freeze
CA_TIMEZONE_MAPPING =

The complete IANA CA Timezone list with mappings to Rails timezones

{
  'America/St_Johns' => 'America/St_Johns',
  'America/Halifax' => 'America/Halifax',
  'America/Glace_Bay' => 'America/Halifax',
  'America/Moncton' => 'America/Halifax',
  'America/Goose_Bay' => 'America/Halifax',
  'America/Blanc-Sablon' => nil,
  'America/Toronto' => 'America/New_York',
  'America/Nipigon' => 'America/New_York',
  'America/Thunder_Bay' => 'America/New_York',
  'America/Iqaluit' => 'America/New_York',
  'America/Pangnirtung' => 'America/New_York',
  'America/Atikokan' => nil,
  'America/Winnipeg' => 'America/Chicago',
  'America/Rainy_River' => 'America/Chicago',
  'America/Resolute' => 'America/Chicago',
  'America/Rankin_Inlet' => 'America/Chicago',
  'America/Regina' => 'America/Guatemala',
  'America/Swift_Current' => 'America/Guatemala',
  'America/Edmonton' => 'America/Denver',
  'America/Cambridge_Bay' => 'America/Denver',
  'America/Yellowknife' => 'America/Denver',
  'America/Inuvik' => 'America/Denver',
  'America/Creston' => 'America/Phoenix',
  'America/Dawson_Creek' => 'America/Phoenix',
  'America/Fort_Nelson' => 'America/Phoenix',
  'America/Vancouver' => 'America/Los_Angeles',
  'America/Whitehorse' => 'America/Los_Angeles',
  'America/Dawson' => 'America/Los_Angeles'
}.freeze
MASTER_MAP =

A mapping to ‘nil` indicates that either: # I was unable to figure out which timezone’s rules match the key timezone # Rails does not have a timezone whose rules match the key timezone.

{}.merge!(US_TIMEZONE_MAPPING).merge!(CA_TIMEZONE_MAPPING)

Instance Method Summary collapse

Instance Method Details

#rails_timezone_for(iana_timezone) ⇒ String

Finds which Timezone string Rails uses to reference an IANA/OLSON timezone.

Parameters:

  • iana_timezone (String) —

    the IANA/OLSON timezone you are trying to use, ‘’America/Boise’‘ as an example

Returns:

  • (String) —

    the rails timezone that encapsulates the timezone you converted.



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# File 'lib/iana_converter.rb', line 80

def rails_timezone_for(iana_timezone)
  MASTER_MAP[iana_timezone]
end