convertible-js/lib/utils.js

Convert 12-hour time string to 24-hour time and vice versa with flexible formatting.

"use strict";
var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
    result["default"] = mod;
    return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
var constants_1 = require("./constants");
var RegexPatterns = __importStar(require("./regex-patterns"));
var addLeadingZero = function (time) {
    // adding leading zero to hours and minutes if it's not two-digit
    if (time && Number(time) < 10) {
        return "0" + time;
    }
    // if time is a falsy value ("" or 0)
    if (!time) {
        return '00';
    }
    return "" + time;
};
exports.customTimeFormat = function (_a, desiredFormat) {
    var hours = _a.hours, minutes = _a.minutes, period = _a.period;
    // => /hh/gi means all occurence of hh (/g) regardless of the casing (/i)
    var time = desiredFormat
        .replace(/hh/gi, addLeadingZero(hours))
        .replace(/h/gi, hours.toString())
        .replace(/mm/gi, addLeadingZero(minutes))
        .replace(/m/gi, minutes.toString());
    // replace time period only if it exists
    if (period) {
        period = RegexPatterns.AM.test(period) ? constants_1.AM : constants_1.PM;
        var upperCasePeriod = period ? period.toUpperCase() : '';
        var lowerCasePeriod = period ? period.toLowerCase() : '';
        time = time.replace(/A/g, upperCasePeriod).replace(/a/g, lowerCasePeriod);
    }
    return time;
};
exports.defaultTimeFormat = function (_a) {
    var hours = _a.hours, minutes = _a.minutes, period = _a.period, secondsAndMilleseconds = _a.secondsAndMilleseconds;
    var time = addLeadingZero(hours) + ":" + addLeadingZero(minutes) + secondsAndMilleseconds;
    if (period) {
        // add space before it so that 12-hour time is formatted like this hh:mm A
        time = time + " " + period;
    }
    return time;
};
exports.getHoursFrom12HoursTime = function (hours, period) {
    if (!period) {
        return hours;
    }
    hours = Number(hours);
    // if period is PM and hours is < 12, add 12 hours
    if (RegexPatterns.PM.test(period) && hours < 12) {
        hours = hours + 12;
    }
    // if time period is AM and hours is === 12, deduct 12 since 12AM is 00 in 24 hour
    if (RegexPatterns.AM.test(period) && hours === 12) {
        hours = hours - 12;
    }
    return hours;
};
exports.getHoursFrom24HoursTime = function (hours) {
    hours = Number(hours);
    // hours is > 13
    if (hours >= 13) {
        hours = hours - 12;
    }
    if (hours === 0) {
        hours = hours + 12;
    }
    return hours;
};
// time period is AM/PM
exports.getTimePeriodFrom24HourTime = function (hours) {
    hours = Number(hours);
    // if period is PM and hours is < 12, add 12 hours
    if (hours < 12) {
        return constants_1.AM;
    }
    // if time period is AM and hours is === 12, deduct 12 since 12AM is 00 in 24 hour
    return constants_1.PM;
};