33 lines
898 B
JavaScript
33 lines
898 B
JavaScript
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const fs = require('fs');
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const path = require('path');
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class TimezoneService {
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constructor() {
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this.cacheStore = {};
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}
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getAvailableTimezones() {
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let availableTimezones;
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if (this.cacheStore.timezones) {
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availableTimezones = this.cacheStore.timezones;
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} else {
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const availableTimezonesContent = fs.readFileSync(path.join(__dirname, '..', 'public', 'timezone.json'), 'utf-8');
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availableTimezones = JSON.parse(availableTimezonesContent);
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this.cacheStore.timezones = availableTimezones;
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}
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return availableTimezones;
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}
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findTimezone(target) {
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const availableTimezones = this.getAvailableTimezones();
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return availableTimezones?.find((timezone) => timezone?.Abbreviation == target);
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}
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validateTimeZone(target) {
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const findTimezone = this.findTimezone(target);
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return !!findTimezone;
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}
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}
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module.exports = TimezoneService;
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