89 lines
2.6 KiB
JavaScript
89 lines
2.6 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const util_1 = require("./util");
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const weekdays = ['SUN', 'MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT'];
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/**
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* Only the first parameter is mandatory. Either the second, the third, or both
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* may be left out.
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*
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* If only one parameter is present, the function yeilds a true value on the
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* weekday that the parameter represents. If the string "GMT" is specified as
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* a second parameter, times are taken to be in GMT, otherwise in local timezone.
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*
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* If both wd1 and wd1 are defined, the condition is true if the current weekday
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* is in between those two weekdays. Bounds are inclusive. If the "GMT" parameter
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* is specified, times are taken to be in GMT, otherwise the local timezone is
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* used.
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*
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* Valid "weekday strings" are:
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*
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* SUN MON TUE WED THU FRI SAT
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*
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* Examples:
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*
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* ``` js
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* weekdayRange("MON", "FRI")
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* true Monday trhough Friday (local timezone).
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*
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* weekdayRange("MON", "FRI", "GMT")
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* same as above, but GMT timezone.
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*
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* weekdayRange("SAT")
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* true on Saturdays local time.
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*
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* weekdayRange("SAT", "GMT")
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* true on Saturdays GMT time.
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*
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* weekdayRange("FRI", "MON")
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* true Friday through Monday (note, order does matter!).
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* ```
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*
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*
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* @param {String} wd1 one of the weekday strings.
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* @param {String} wd2 one of the weekday strings.
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* @param {String} gmt is either the string: GMT or is left out.
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* @return {Boolean}
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*/
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function weekdayRange(wd1, wd2, gmt) {
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let useGMTzone = false;
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let wd1Index = -1;
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let wd2Index = -1;
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let wd2IsGmt = false;
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if ((0, util_1.isGMT)(gmt)) {
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useGMTzone = true;
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}
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else if ((0, util_1.isGMT)(wd2)) {
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useGMTzone = true;
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wd2IsGmt = true;
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}
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wd1Index = weekdays.indexOf(wd1);
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if (!wd2IsGmt && isWeekday(wd2)) {
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wd2Index = weekdays.indexOf(wd2);
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}
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let todaysDay = getTodaysDay(useGMTzone);
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let result;
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if (wd2Index < 0) {
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result = todaysDay === wd1Index;
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}
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else if (wd1Index <= wd2Index) {
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result = valueInRange(wd1Index, todaysDay, wd2Index);
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}
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else {
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result =
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valueInRange(wd1Index, todaysDay, 6) ||
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valueInRange(0, todaysDay, wd2Index);
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}
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return result;
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}
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exports.default = weekdayRange;
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function getTodaysDay(gmt) {
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return gmt ? new Date().getUTCDay() : new Date().getDay();
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}
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// start <= value <= finish
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function valueInRange(start, value, finish) {
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return start <= value && value <= finish;
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}
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function isWeekday(v) {
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return weekdays.indexOf(v) !== -1;
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}
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//# sourceMappingURL=weekdayRange.js.map
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