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util.js
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util.js
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/**
* Tagged template literal to unindent strings.
* @param {Array<string>} strings
* @param {...*} args
* @return {string}
*/
function unindent(strings, ...args) {
const pattern = /^ *\|/gm;
let result = strings[0].replace(pattern, "");
for (let i = 0; i < strings.length - 1; i++) {
result += args[i];
result += strings[i + 1].replace(pattern, "");
}
return result;
}
/**
* Time string to milliseconds.
* Example:
* parseTime('1000') => 1000
* parseTime('2s') => 2000
* parseTime('1m5s') => 65000
* parseTime('1h30m1s') => 5401000
* parseTime('1d') => 86400000
* @param {string} time
* @return {number}
*/
function parseTime(time) {
const timeUnits = [
// days
{ pattern: /(\d*\.?\d*)d/i, multiplier: 86400e3 },
// hours
{ pattern: /(\d*\.?\d*)h/i, multiplier: 3600e3 },
// minutes
{ pattern: /(\d*\.?\d*)m/i, multiplier: 60e3 },
// seconds
{ pattern: /(\d*\.?\d*)s/i, multiplier: 1e3 },
// milliseconds
{ pattern: /(\d*\.?\d*)\b/i, multiplier: 1 },
];
return timeUnits.reduce((duration, { pattern, multiplier }) => {
const match = time.match(pattern);
const amount = match && Number(match[1]);
if (amount) {
return amount * multiplier + duration;
} else {
return duration;
}
}, 0);
}
/**
* toLowerInitial("TechSupport") => "techSupport"
* @param {string} string
* @return {string}
*/
function toLowerInitial(string) {
return string.charAt(0).toLowerCase() + string.slice(1);
}
module.exports = {
unindent,
parseTime,
toLowerInitial,
};