| 1 | /**
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| 2 | * filesize
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| 3 | *
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| 4 | * @copyright 2022 Jason Mulligan <jason.mulligan@avoidwork.com>
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| 5 | * @license BSD-3-Clause
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| 6 | * @version 8.0.7
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| 7 | */
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| 8 | (function (global, factory) {
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| 9 | typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
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| 10 | typeof define === 'function' && define.amd ? define(factory) :
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| 11 | (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.filesize = factory());
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| 12 | })(this, (function () { 'use strict';
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| 13 |
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| 14 | const b = /^(b|B)$/,
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| 15 | symbol = {
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| 16 | iec: {
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| 17 | bits: ["bit", "Kibit", "Mibit", "Gibit", "Tibit", "Pibit", "Eibit", "Zibit", "Yibit"],
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| 18 | bytes: ["B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"]
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| 19 | },
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| 20 | jedec: {
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| 21 | bits: ["bit", "Kbit", "Mbit", "Gbit", "Tbit", "Pbit", "Ebit", "Zbit", "Ybit"],
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| 22 | bytes: ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"]
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| 23 | }
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| 24 | },
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| 25 | fullform = {
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| 26 | iec: ["", "kibi", "mebi", "gibi", "tebi", "pebi", "exbi", "zebi", "yobi"],
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| 27 | jedec: ["", "kilo", "mega", "giga", "tera", "peta", "exa", "zetta", "yotta"]
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| 28 | },
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| 29 | roundingFuncs = {
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| 30 | floor: Math.floor,
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| 31 | ceil: Math.ceil
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| 32 | };
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| 33 |
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| 34 | /**
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| 35 | * filesize
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| 36 | *
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| 37 | * @method filesize
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| 38 | * @param {Mixed} arg String, Int or Float to transform
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| 39 | * @param {Object} descriptor [Optional] Flags
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| 40 | * @return {String} Readable file size String
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| 41 | */
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| 42 | function filesize (arg, descriptor = {}) {
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| 43 | let result = [],
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| 44 | val = 0,
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| 45 | e, base, bits, ceil, full, fullforms, locale, localeOptions, neg, num, output, pad, round, u, unix, separator, spacer, standard, symbols, roundingFunc, precision;
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| 46 |
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| 47 | if (isNaN(arg)) {
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| 48 | throw new TypeError("Invalid number");
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| 49 | }
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| 50 |
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| 51 | bits = descriptor.bits === true;
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| 52 | unix = descriptor.unix === true;
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| 53 | pad = descriptor.pad === true;
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| 54 | base = descriptor.base || 10;
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| 55 | round = descriptor.round !== void 0 ? descriptor.round : unix ? 1 : 2;
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| 56 | locale = descriptor.locale !== void 0 ? descriptor.locale : "";
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| 57 | localeOptions = descriptor.localeOptions || {};
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| 58 | separator = descriptor.separator !== void 0 ? descriptor.separator : "";
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| 59 | spacer = descriptor.spacer !== void 0 ? descriptor.spacer : unix ? "" : " ";
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| 60 | symbols = descriptor.symbols || {};
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| 61 | standard = base === 2 ? descriptor.standard || "iec" : "jedec";
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| 62 | output = descriptor.output || "string";
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| 63 | full = descriptor.fullform === true;
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| 64 | fullforms = descriptor.fullforms instanceof Array ? descriptor.fullforms : [];
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| 65 | e = descriptor.exponent !== void 0 ? descriptor.exponent : -1;
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| 66 | roundingFunc = roundingFuncs[descriptor.roundingMethod] || Math.round;
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| 67 | num = Number(arg);
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| 68 | neg = num < 0;
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| 69 | ceil = base > 2 ? 1000 : 1024;
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| 70 | precision = isNaN(descriptor.precision) === false ? parseInt(descriptor.precision, 10) : 0;
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| 71 |
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| 72 | // Flipping a negative number to determine the size
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| 73 | if (neg) {
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| 74 | num = -num;
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| 75 | }
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| 76 |
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| 77 | // Determining the exponent
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| 78 | if (e === -1 || isNaN(e)) {
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| 79 | e = Math.floor(Math.log(num) / Math.log(ceil));
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| 80 |
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| 81 | if (e < 0) {
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| 82 | e = 0;
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| 83 | }
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| 84 | }
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| 85 |
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| 86 | // Exceeding supported length, time to reduce & multiply
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| 87 | if (e > 8) {
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| 88 | if (precision > 0) {
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| 89 | precision += 8 - e;
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| 90 | }
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| 91 |
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| 92 | e = 8;
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| 93 | }
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| 94 |
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| 95 | if (output === "exponent") {
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| 96 | return e;
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| 97 | }
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| 98 |
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| 99 | // Zero is now a special case because bytes divide by 1
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| 100 | if (num === 0) {
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| 101 | result[0] = 0;
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| 102 | u = result[1] = unix ? "" : symbol[standard][bits ? "bits" : "bytes"][e];
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| 103 | } else {
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| 104 | val = num / (base === 2 ? Math.pow(2, e * 10) : Math.pow(1000, e));
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| 105 |
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| 106 | if (bits) {
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| 107 | val = val * 8;
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| 108 |
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| 109 | if (val >= ceil && e < 8) {
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| 110 | val = val / ceil;
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| 111 | e++;
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| 112 | }
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| 113 | }
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| 114 |
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| 115 | const p = Math.pow(10, e > 0 ? round : 0);
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| 116 | result[0] = roundingFunc(val * p) / p;
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| 117 |
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| 118 | if (result[0] === ceil && e < 8 && descriptor.exponent === void 0) {
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| 119 | result[0] = 1;
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| 120 | e++;
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| 121 | }
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| 122 |
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| 123 | u = result[1] = base === 10 && e === 1 ? bits ? "kbit" : "kB" : symbol[standard][bits ? "bits" : "bytes"][e];
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| 124 |
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| 125 | if (unix) {
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| 126 | result[1] = result[1].charAt(0);
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| 127 |
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| 128 | if (b.test(result[1])) {
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| 129 | result[0] = Math.floor(result[0]);
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| 130 | result[1] = "";
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| 131 | }
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| 132 | }
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| 133 | }
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| 134 |
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| 135 | // Decorating a 'diff'
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| 136 | if (neg) {
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| 137 | result[0] = -result[0];
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| 138 | }
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| 139 |
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| 140 | // Setting optional precision
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| 141 | if (precision > 0) {
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| 142 | result[0] = result[0].toPrecision(precision);
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| 143 | }
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| 144 |
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| 145 | // Applying custom symbol
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| 146 | result[1] = symbols[result[1]] || result[1];
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| 147 |
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| 148 | if (locale === true) {
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| 149 | result[0] = result[0].toLocaleString();
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| 150 | } else if (locale.length > 0) {
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| 151 | result[0] = result[0].toLocaleString(locale, localeOptions);
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| 152 | } else if (separator.length > 0) {
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| 153 | result[0] = result[0].toString().replace(".", separator);
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| 154 | }
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| 155 |
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| 156 | if (pad && Number.isInteger(result[0]) === false && round > 0) {
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| 157 | const x = separator || ".",
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| 158 | tmp = result[0].toString().split(x),
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| 159 | s = tmp[1] || "",
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| 160 | l = s.length,
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| 161 | n = round - l;
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| 162 |
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| 163 | result[0] = `${tmp[0]}${x}${s.padEnd(l + n, "0")}`;
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| 164 | }
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| 165 |
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| 166 | if (full) {
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| 167 | result[1] = fullforms[e] ? fullforms[e] : fullform[standard][e] + (bits ? "bit" : "byte") + (result[0] === 1 ? "" : "s");
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| 168 | }
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| 169 |
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| 170 | // Returning Array, Object, or String (default)
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| 171 | return output === "array" ? result : output === "object" ? {value: result[0], symbol: result[1], exponent: e, unit: u} : result.join(spacer);
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| 172 | }
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| 173 |
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| 174 | // Partial application for functional programming
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| 175 | filesize.partial = opt => arg => filesize(arg, opt);
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| 176 |
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| 177 | return filesize;
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| 178 |
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| 179 | }));
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