/* Solution inspired by https://stackoverflow.com/a/20732091/2594227 answer */
const UNITS = ['B', 'KB', 'MB', 'GB', 'TB'] as const
// eslint-disable-next-line import/prefer-default-export
export type DisplaySizeUnit = typeof UNITS[number];
/**
* Changes size in bytes to string. If unit is not provided - tries to find the best match.
*
* @param {number} size
* @param {'B' | 'KB' | 'MB' | 'GB' | 'TB'} [unit]
* @returns {string}
* @memberof module:@adminjs/design-system
*/
const humanFileSize = (size: number | string, unit?: DisplaySizeUnit): string => {
let foundUnitIndex: number | null = null
if (unit) {
foundUnitIndex = UNITS.findIndex((u) => u === unit)
}
const unitIndex = foundUnitIndex || Math.min(
Math.floor(Math.log(+size) / Math.log(1024)),
UNITS.length,
)
const calculatedSize = (+size / (1024 ** unitIndex))
const guessedUnit = ['B', 'kB', 'MB', 'GB', 'TB'][unitIndex]
return `${Math.round(calculatedSize)} ${guessedUnit}`
}
export { humanFileSize }
Source