box-ui-elements-mlh/es/utils/getFileSize.js.flow

Box UI Elements

import filesize from 'filesize';

const defaultDigitalUnits = ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
const bcp47TagToDigitalUnits = {
    fi: ['t', 'kt', 'Mt', 'Gt', 'Tt', 'Pt', 'Et', 'Zt', 'Yt'],
    fr: ['o', 'Ko', 'Mo', 'Go', 'To', 'Po', 'Eo', 'Zo', 'Yo'],
    ru: ['Б', 'КБ', 'МБ', 'ГБ', 'ТБ', 'ПБ', 'ЭБ', 'ЗБ', 'ЙБ'],
};

/**
 * Formats a file size from number of bytes to a human-readable, localized string.
 * @param {number} size Number of bytes
 * @param {string} [locale] Optional locale, defaults to 'en'
 * @returns {string} The size as a localized string
 */
const getFileSize = (size, locale = 'en') => {
    const settings = { round: 1, locale };

    const localizedUnits = bcp47TagToDigitalUnits[locale];
    if (localizedUnits) {
        // map default units to localized units, ex. { B: Б, KB: КБ, ... }
        settings.symbols = defaultDigitalUnits.reduce((symbols, unit, index) => {
            symbols[unit] = localizedUnits[index];
            return symbols;
        }, {});
    }

    return filesize(size, settings);
};

export default getFileSize;