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/*
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2021-09-04 23:06:12 +05:30
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The time conversion of normalized time to the railway is a simple algorithm
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because we know that if the time is in 'AM' value it means they only want
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some changes on hours and minutes and if the time in 'PM' it means the only
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2021-09-04 23:05:30 +05:30
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want some changes in hour value.
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2021-10-28 15:37:43 +05:30
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Input Format -> 07:05:45PM
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Output Format -> 19:05:45
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2021-09-04 23:05:30 +05:30
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Problem & Explanation Source : https://www.mathsisfun.com/time.html
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*/
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/**
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* RailwayTimeConversion method converts normalized time string to Railway time string.
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* @param {String} timeString Normalized time string.
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* @returns {String} Railway time string.
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*/
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const RailwayTimeConversion = (timeString) => {
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// firstly, check that input is a string or not.
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if (typeof timeString !== 'string') {
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2024-03-02 08:54:46 +01:00
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throw new TypeError('Argument is not a string.')
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2021-09-04 23:06:12 +05:30
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}
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// split the string by ':' character.
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2023-02-07 08:50:28 -08:00
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const [hour, minute, secondWithShift] = timeString.split(':')
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2021-09-04 23:06:12 +05:30
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// split second and shift value.
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2023-10-03 23:08:19 +02:00
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const [second, shift] = [
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2024-04-13 20:51:54 +03:00
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secondWithShift.substring(0, 2),
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secondWithShift.substring(2)
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]
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// convert shifted time to not-shift time(Railway time) by using the above explanation.
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if (shift === 'PM') {
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if (parseInt(hour) === 12) {
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return `${hour}:${minute}:${second}`
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} else {
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return `${parseInt(hour) + 12}:${minute}:${second}`
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}
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} else {
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if (parseInt(hour) === 12) {
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return `00:${minute}:${second}`
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} else {
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return `${hour}:${minute}:${second}`
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}
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}
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}
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2021-10-09 13:18:40 +02:00
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export { RailwayTimeConversion }
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