90 lines
3.8 KiB
Go
90 lines
3.8 KiB
Go
package service
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// Legacy IANA timezone aliases → canonical names.
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//
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// Browsers report Intl.DateTimeFormat().resolvedOptions().timeZone, and the
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// ICU/CLDR data they ship still uses several LEGACY ids as its canonical
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// form — Safari and Chrome genuinely say "Asia/Calcutta", not "Asia/Kolkata".
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// Go's time.LoadLocation resolves these aliases, so they pass validation and
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// get stored; but a Postgres built against tzdata without the "backward"
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// links (Debian/Alpine images with the tzdata-legacy split) rejects them in
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// AT TIME ZONE with SQLSTATE 22023. Everything we store or hand to SQL goes
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// through canonicalTZ first.
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var legacyTZ = map[string]string{
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// Ids ICU/CLDR still reports as canonical (the ones browsers send).
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"Asia/Calcutta": "Asia/Kolkata",
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"Asia/Katmandu": "Asia/Kathmandu",
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"Asia/Rangoon": "Asia/Yangon",
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"Asia/Saigon": "Asia/Ho_Chi_Minh",
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"America/Buenos_Aires": "America/Argentina/Buenos_Aires",
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"America/Catamarca": "America/Argentina/Catamarca",
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"America/Cordoba": "America/Argentina/Cordoba",
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"America/Jujuy": "America/Argentina/Jujuy",
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"America/Mendoza": "America/Argentina/Mendoza",
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"America/Indianapolis": "America/Indiana/Indianapolis",
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"America/Louisville": "America/Kentucky/Louisville",
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"America/Godthab": "America/Nuuk",
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"Atlantic/Faeroe": "Atlantic/Faroe",
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"Pacific/Ponape": "Pacific/Pohnpei",
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"Pacific/Truk": "Pacific/Chuuk",
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"Europe/Kiev": "Europe/Kyiv",
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// Other common backward links, in case a zone arrives from an older
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// client or was set by hand.
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"Asia/Ashkhabad": "Asia/Ashgabat",
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"Asia/Chongqing": "Asia/Shanghai",
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"Asia/Chungking": "Asia/Shanghai",
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"Asia/Dacca": "Asia/Dhaka",
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"Asia/Harbin": "Asia/Shanghai",
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"Asia/Istanbul": "Europe/Istanbul",
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"Asia/Kashgar": "Asia/Urumqi",
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"Asia/Macao": "Asia/Macau",
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"Asia/Tel_Aviv": "Asia/Jerusalem",
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"Asia/Thimbu": "Asia/Thimphu",
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"Asia/Ujung_Pandang": "Asia/Makassar",
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"Asia/Ulan_Bator": "Asia/Ulaanbaatar",
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"Africa/Asmera": "Africa/Asmara",
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"America/Coral_Harbour": "America/Atikokan",
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"Australia/ACT": "Australia/Sydney",
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"Australia/Canberra": "Australia/Sydney",
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"Australia/NSW": "Australia/Sydney",
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"Australia/North": "Australia/Darwin",
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"Australia/Queensland": "Australia/Brisbane",
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"Australia/South": "Australia/Adelaide",
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"Australia/Tasmania": "Australia/Hobart",
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"Australia/Victoria": "Australia/Melbourne",
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"Australia/West": "Australia/Perth",
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"US/Alaska": "America/Anchorage",
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"US/Arizona": "America/Phoenix",
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"US/Central": "America/Chicago",
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"US/Eastern": "America/New_York",
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"US/Hawaii": "Pacific/Honolulu",
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"US/Mountain": "America/Denver",
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"US/Pacific": "America/Los_Angeles",
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"GB": "Europe/London",
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"GB-Eire": "Europe/London",
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"Eire": "Europe/Dublin",
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"Egypt": "Africa/Cairo",
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"Hongkong": "Asia/Hong_Kong",
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"Iceland": "Atlantic/Reykjavik",
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"Israel": "Asia/Jerusalem",
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"Japan": "Asia/Tokyo",
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"NZ": "Pacific/Auckland",
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"Poland": "Europe/Warsaw",
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"Portugal": "Europe/Lisbon",
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"PRC": "Asia/Shanghai",
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"ROC": "Asia/Taipei",
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"ROK": "Asia/Seoul",
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"Singapore": "Asia/Singapore",
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"Turkey": "Europe/Istanbul",
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}
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// canonicalTZ returns the canonical IANA name for tz, resolving legacy
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// aliases; unknown values pass through unchanged.
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func canonicalTZ(tz string) string {
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if c, ok := legacyTZ[tz]; ok {
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return c
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}
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return tz
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}
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