i18n-js
Version:
A small library to provide I18n on JavaScript.
78 lines • 3.14 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.numberToHuman = void 0;
const bignumber_js_1 = __importDefault(require("bignumber.js"));
const sortBy_1 = __importDefault(require("lodash/sortBy"));
const zipObject_1 = __importDefault(require("lodash/zipObject"));
const getFullScope_1 = require("./getFullScope");
const lookup_1 = require("./lookup");
const roundNumber_1 = require("./roundNumber");
const inferType_1 = require("./inferType");
const DECIMAL_UNITS = {
"0": "unit",
"1": "ten",
"2": "hundred",
"3": "thousand",
"6": "million",
"9": "billion",
"12": "trillion",
"15": "quadrillion",
"-1": "deci",
"-2": "centi",
"-3": "mili",
"-6": "micro",
"-9": "nano",
"-12": "pico",
"-15": "femto",
};
const INVERTED_DECIMAL_UNITS = (0, zipObject_1.default)(Object.values(DECIMAL_UNITS), Object.keys(DECIMAL_UNITS).map((key) => parseInt(key, 10)));
function numberToHuman(i18n, input, options) {
const roundOptions = {
roundMode: options.roundMode,
precision: options.precision,
significant: options.significant,
};
let units;
if ((0, inferType_1.inferType)(options.units) === "string") {
const scope = options.units;
units = (0, lookup_1.lookup)(i18n, scope);
if (!units) {
throw new Error(`The scope "${i18n.locale}${i18n.defaultSeparator}${(0, getFullScope_1.getFullScope)(i18n, scope, {})}" couldn't be found`);
}
}
else {
units = options.units;
}
let formattedNumber = (0, roundNumber_1.roundNumber)(new bignumber_js_1.default(input), roundOptions);
const unitExponents = (units) => (0, sortBy_1.default)(Object.keys(units).map((name) => INVERTED_DECIMAL_UNITS[name]), (numeric) => numeric * -1);
const calculateExponent = (num, units) => {
const exponent = num.isZero()
? 0
: Math.floor(Math.log10(num.abs().toNumber()));
return unitExponents(units).find((exp) => exponent >= exp) || 0;
};
const determineUnit = (units, exponent) => {
const expName = DECIMAL_UNITS[exponent.toString()];
return units[expName] || "";
};
const exponent = calculateExponent(new bignumber_js_1.default(formattedNumber), units);
const unit = determineUnit(units, exponent);
formattedNumber = (0, roundNumber_1.roundNumber)(new bignumber_js_1.default(formattedNumber).div(Math.pow(10, exponent)), roundOptions);
if (options.stripInsignificantZeros) {
let [whole, significand] = formattedNumber.split(".");
significand = (significand || "").replace(/0+$/, "");
formattedNumber = whole;
if (significand) {
formattedNumber += `${options.separator}${significand}`;
}
}
return options.format
.replace("%n", formattedNumber || "0")
.replace("%u", unit)
.trim();
}
exports.numberToHuman = numberToHuman;
//# sourceMappingURL=numberToHuman.js.map