source: frontend/node_modules/filesize/lib/filesize.esm.js

/**
 * filesize
 *
 * @copyright 2022 Jason Mulligan <jason.mulligan@avoidwork.com>
 * @license BSD-3-Clause
 * @version 8.0.7
 */
const b = /^(b|B)$/,
        symbol = {
                iec: {
                        bits: ["bit", "Kibit", "Mibit", "Gibit", "Tibit", "Pibit", "Eibit", "Zibit", "Yibit"],
                        bytes: ["B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"]
                },
                jedec: {
                        bits: ["bit", "Kbit", "Mbit", "Gbit", "Tbit", "Pbit", "Ebit", "Zbit", "Ybit"],
                        bytes: ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"]
                }
        },
        fullform = {
                iec: ["", "kibi", "mebi", "gibi", "tebi", "pebi", "exbi", "zebi", "yobi"],
                jedec: ["", "kilo", "mega", "giga", "tera", "peta", "exa", "zetta", "yotta"]
        },
        roundingFuncs = {
                floor: Math.floor,
                ceil: Math.ceil
        };

/**
 * filesize
 *
 * @method filesize
 * @param  {Mixed}   arg        String, Int or Float to transform
 * @param  {Object}  descriptor [Optional] Flags
 * @return {String}             Readable file size String
 */
function filesize (arg, descriptor = {}) {
        let result = [],
                val = 0,
                e, base, bits, ceil, full, fullforms, locale, localeOptions, neg, num, output, pad, round, u, unix, separator, spacer, standard, symbols, roundingFunc, precision;

        if (isNaN(arg)) {
                throw new TypeError("Invalid number");
        }

        bits = descriptor.bits === true;
        unix = descriptor.unix === true;
        pad = descriptor.pad === true;
        base = descriptor.base || 10;
        round = descriptor.round !== void 0 ? descriptor.round : unix ? 1 : 2;
        locale = descriptor.locale !== void 0 ? descriptor.locale : "";
        localeOptions = descriptor.localeOptions || {};
        separator = descriptor.separator !== void 0 ? descriptor.separator : "";
        spacer = descriptor.spacer !== void 0 ? descriptor.spacer : unix ? "" : " ";
        symbols = descriptor.symbols || {};
        standard = base === 2 ? descriptor.standard || "iec" : "jedec";
        output = descriptor.output || "string";
        full = descriptor.fullform === true;
        fullforms = descriptor.fullforms instanceof Array ? descriptor.fullforms : [];
        e = descriptor.exponent !== void 0 ? descriptor.exponent : -1;
        roundingFunc = roundingFuncs[descriptor.roundingMethod] || Math.round;
        num = Number(arg);
        neg = num < 0;
        ceil = base > 2 ? 1000 : 1024;
        precision = isNaN(descriptor.precision) === false ? parseInt(descriptor.precision, 10) : 0;

        // Flipping a negative number to determine the size
        if (neg) {
                num = -num;
        }

        // Determining the exponent
        if (e === -1 || isNaN(e)) {
                e = Math.floor(Math.log(num) / Math.log(ceil));

                if (e < 0) {
                        e = 0;
                }
        }

        // Exceeding supported length, time to reduce & multiply
        if (e > 8) {
                if (precision > 0) {
                        precision += 8 - e;
                }

                e = 8;
        }

        if (output === "exponent") {
                return e;
        }

        // Zero is now a special case because bytes divide by 1
        if (num === 0) {
                result[0] = 0;
                u = result[1] = unix ? "" : symbol[standard][bits ? "bits" : "bytes"][e];
        } else {
                val = num / (base === 2 ? Math.pow(2, e * 10) : Math.pow(1000, e));

                if (bits) {
                        val = val * 8;

                        if (val >= ceil && e < 8) {
                                val = val / ceil;
                                e++;
                        }
                }

                const p = Math.pow(10, e > 0 ? round : 0);
                result[0] = roundingFunc(val * p) / p;

                if (result[0] === ceil && e < 8 && descriptor.exponent === void 0) {
                        result[0] = 1;
                        e++;
                }

                u = result[1] = base === 10 && e === 1 ? bits ? "kbit" : "kB" : symbol[standard][bits ? "bits" : "bytes"][e];

                if (unix) {
                        result[1] = result[1].charAt(0);

                        if (b.test(result[1])) {
                                result[0] = Math.floor(result[0]);
                                result[1] = "";
                        }
                }
        }

        // Decorating a 'diff'
        if (neg) {
                result[0] = -result[0];
        }

        // Setting optional precision
        if (precision > 0) {
                result[0] = result[0].toPrecision(precision);
        }

        // Applying custom symbol
        result[1] = symbols[result[1]] || result[1];

        if (locale === true) {
                result[0] = result[0].toLocaleString();
        } else if (locale.length > 0) {
                result[0] = result[0].toLocaleString(locale, localeOptions);
        } else if (separator.length > 0) {
                result[0] = result[0].toString().replace(".", separator);
        }

        if (pad && Number.isInteger(result[0]) === false && round > 0) {
                const x = separator || ".",
                        tmp = result[0].toString().split(x),
                        s = tmp[1] || "",
                        l = s.length,
                        n = round - l;

                result[0] = `${tmp[0]}${x}${s.padEnd(l + n, "0")}`;
        }

        if (full) {
                result[1] = fullforms[e] ? fullforms[e] : fullform[standard][e] + (bits ? "bit" : "byte") + (result[0] === 1 ? "" : "s");
        }

        // Returning Array, Object, or String (default)
        return output === "array" ? result : output === "object" ? {value: result[0], symbol: result[1], exponent: e, unit: u} : result.join(spacer);
}

// Partial application for functional programming
filesize.partial = opt => arg => filesize(arg, opt);

export { filesize as default };