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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /browser/components/urlbar/unitconverters/UnitConverterTimezone.sys.mjs
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'browser/components/urlbar/unitconverters/UnitConverterTimezone.sys.mjs')
-rw-r--r--browser/components/urlbar/unitconverters/UnitConverterTimezone.sys.mjs148
1 files changed, 148 insertions, 0 deletions
diff --git a/browser/components/urlbar/unitconverters/UnitConverterTimezone.sys.mjs b/browser/components/urlbar/unitconverters/UnitConverterTimezone.sys.mjs
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const TIMEZONES = {
+ IDLW: -12,
+ NT: -11,
+ HST: -10,
+ AKST: -9,
+ PST: -8,
+ AKDT: -8,
+ MST: -7,
+ PDT: -7,
+ CST: -6,
+ MDT: -6,
+ EST: -5,
+ CDT: -5,
+ EDT: -4,
+ AST: -4,
+ GUY: -3,
+ ADT: -3,
+ AT: -2,
+ UTC: 0,
+ GMT: 0,
+ Z: 0,
+ WET: 0,
+ WEST: 1,
+ CET: 1,
+ BST: 1,
+ IST: 1,
+ CEST: 2,
+ EET: 2,
+ EEST: 3,
+ MSK: 3,
+ MSD: 4,
+ ZP4: 4,
+ ZP5: 5,
+ ZP6: 6,
+ WAST: 7,
+ AWST: 8,
+ WST: 8,
+ JST: 9,
+ ACST: 9.5,
+ ACDT: 10.5,
+ AEST: 10,
+ AEDT: 11,
+ NZST: 12,
+ IDLE: 12,
+ NZD: 13,
+};
+
+const TIME_REGEX = "([0-2]?[0-9])(:([0-5][0-9]))?\\s*([ap]m)?";
+const TIMEZONE_REGEX = "\\w+";
+
+// NOTE: This regex need to be localized upon supporting multi locales
+// since it supports en-US input format only.
+const QUERY_REGEX = new RegExp(
+ `^(${TIME_REGEX}|now)\\s*(${TIMEZONE_REGEX})?(?:\\s+in\\s+|\\s+to\\s+|\\s*=\\s*)(${TIMEZONE_REGEX}|here)`,
+ "i"
+);
+
+const KEYWORD_HERE = "HERE";
+const KEYWORD_NOW = "NOW";
+
+/**
+ * This module converts timezone.
+ */
+export class UnitConverterTimezone {
+ /**
+ * Convert the given search string.
+ *
+ * @param {string} searchString
+ * The string to be converted
+ * @returns {string} conversion result.
+ */
+ convert(searchString) {
+ const regexResult = QUERY_REGEX.exec(searchString);
+ if (!regexResult) {
+ return null;
+ }
+
+ const inputTime = regexResult[1].toUpperCase();
+ const inputTimezone = regexResult[6]?.toUpperCase();
+ let outputTimezone = regexResult[7].toUpperCase();
+
+ if (
+ (inputTimezone &&
+ inputTimezone !== KEYWORD_NOW &&
+ !(inputTimezone in TIMEZONES)) ||
+ (outputTimezone !== KEYWORD_HERE && !(outputTimezone in TIMEZONES))
+ ) {
+ return null;
+ }
+
+ const inputDate = new Date();
+ let isMeridiemNeeded = false;
+ if (inputTime === KEYWORD_NOW) {
+ inputDate.setUTCHours(inputDate.getHours());
+ inputDate.setUTCMinutes(inputDate.getMinutes());
+ } else {
+ // If the input was given as AM/PM, we need to convert it to 24h.
+ // 12AM is converted to 00, and for PM times we add 12 to the hour value except for 12PM.
+ // If the input is for example 23PM, we use 23 as the hour - we don't add 12 as this would result in a date increment.
+ const inputAMPM = regexResult[5]?.toLowerCase() || "";
+ const inputHours =
+ regexResult[2] === "12" && inputAMPM === "am"
+ ? 0
+ : Number(regexResult[2]);
+ const inputMinutes = regexResult[4] ? Number(regexResult[4]) : 0;
+ const inputMeridianHourShift =
+ inputAMPM === "pm" && inputHours < 12 ? 12 : 0;
+ inputDate.setUTCHours(inputHours + inputMeridianHourShift);
+ inputDate.setUTCMinutes(inputMinutes);
+ isMeridiemNeeded = !!inputAMPM;
+ }
+
+ const inputOffset = inputTimezone
+ ? TIMEZONES[inputTimezone] * 60
+ : -inputDate.getTimezoneOffset();
+ let outputOffset;
+ if (outputTimezone === KEYWORD_HERE) {
+ outputOffset = -inputDate.getTimezoneOffset();
+ const sign = -inputDate.getTimezoneOffset() > 0 ? "+" : "-";
+ const hours = parseInt(Math.abs(outputOffset) / 60);
+ const minutes = formatMinutes((outputOffset % 60) * 60);
+ outputTimezone = `UTC${sign}${hours}${minutes}`;
+ } else {
+ outputOffset = TIMEZONES[outputTimezone] * 60;
+ }
+
+ const outputDate = new Date(inputDate.getTime());
+ outputDate.setUTCMinutes(
+ outputDate.getUTCMinutes() - inputOffset + outputOffset
+ );
+
+ const time = new Intl.DateTimeFormat("en-US", {
+ timeStyle: "short",
+ hour12: isMeridiemNeeded,
+ timeZone: "UTC",
+ }).format(outputDate);
+
+ return `${time} ${outputTimezone}`;
+ }
+}
+
+function formatMinutes(minutes) {
+ return minutes.toString().padStart(2, "0");
+}