@progress/kendo-date-math
Version:
Kendo UI typescript package exporting functions for Date manipulations
54 lines (53 loc) • 1.92 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.findRule = void 0;
var timezones_1 = require("./timezones");
var rule_to_date_1 = require("./rule-to-date");
var CURRENT_UTC_TIME = (new Date()).getTime();
/**
* @hidden
*
* A function that finds zone rules which become applicable after a specific time.
*
* @param timezone - The timezone name. For example, `America/Chicago`, `Europe/Sofia`.
* @param utcTime - The UTC time boundary for a zone rule. Defaults to the current UTC time.
*
* @return - Returns a zone rule for the specific zone name.
*
* @example
* ```ts-no-run
* findZone('Europe/Sofia'); //[-120,"EU","EE%sT",null]
* ```
*/
var findRule = function (zoneRule, utcTime, zoneOffset) {
if (utcTime === void 0) { utcTime = CURRENT_UTC_TIME; }
if (zoneOffset === void 0) { zoneOffset = 0; }
var rules = timezones_1.timezones.rules[zoneRule];
if (!rules) {
var time = zoneRule.split(":");
var offset = 0;
if (time.length > 1) {
offset = time[0] * 60 + Number(time[1]);
}
return [-1000000, 'max', '-', 'Jan', 1, [0, 0, 0], offset, '-'];
}
var year = new Date(utcTime).getUTCFullYear();
rules = rules.filter(function (currentRule) {
var from = currentRule[0];
var to = currentRule[1];
return from <= year && (to >= year || (from === year && to === "only") || to === "max");
});
rules.push(utcTime);
rules.sort(function (a, b) {
if (typeof a !== "number") {
a = Number((0, rule_to_date_1.ruleToDate)(year, a, zoneOffset));
}
if (typeof b !== "number") {
b = Number((0, rule_to_date_1.ruleToDate)(year, b, zoneOffset));
}
return a - b;
});
var rule = rules[rules.indexOf(utcTime) - 1] || rules[rules.length - 1];
return isNaN(rule) ? rule : null;
};
exports.findRule = findRule;