Parse date

index.js

import parseDate from './parseDate.js';

parseDate('1 minute'); // => 60000
parseDate('1 hour'); // => 3600000
parseDate('Not a date'); // => Error: Invalid format

/*
 * Usage: count {unit}
 * Units:
 * s, second, seconds, sec
 * m, minute, minutes, min
 * h hour, hours
 * d, day, days
 * w, week, weeks
 * mo, month, months
 * y, year, years
 */

parseDate.js

function match(){
    const input = Array.from(arguments);
    const checkOn = input[0];
    const checksList = input.slice(1);
    let isMatch = false;
    checksList.forEach(check=>{
        if(checkOn === check){
            isMatch = true;
        }
    })
    return isMatch;
}

export default (timeString) => {
    const splitDate = timeString.split(' ');
    if(splitDate.length !== 2) throw new Error('Invalid format');
    
    const date = splitDate[0];
    const dateFormat = splitDate[1];
    let millisecondLength;

    if(match(dateFormat, 'ms', 'millisecond', 'milliseconds')){
        millisecondLength = 1;
    } else if(match(dateFormat, 's', 'second', 'seconds', 'sec')){
        millisecondLength = 1000;
    } else if(match(dateFormat, 'm', 'minute', 'minutes', 'min')){
        millisecondLength = 1000 * 60;
    } else if(match(dateFormat, 'h', 'hour', 'hours')){
        millisecondLength = 1000 * 60 * 60;
    } else if(match(dateFormat, 'd', 'day', 'days')){
        millisecondLength = 1000 * 60 * 60 * 24;
    } else if(match(dateFormat, 'w', 'week', 'weeks')){
        millisecondLength = 1000 * 60 * 60 * 24 * 7;
    } else if(match(dateFormat, 'mo', 'month', 'months')){
        millisecondLength = 1000 * 60 * 60 * 24 * 30;
    } else if(match(dateFormat, 'y', 'year', 'years')){
        millisecondLength = 1000 * 60 * 60 * 24 * 365;
    } else {
        throw new Error('Invalid format');
    }

    return millisecondLength * parseInt(date);
}