@toreda/strong-types/dist/to/int/number.js

Better TypeScript code in fewer lines.

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.toIntNumber = void 0;
/**
 *	MIT License
 *
 *	Copyright (c) 2019 - 2021 Toreda, Inc.
 *
 *	Permission is hereby granted, free of charge, to any person obtaining a copy
 *	of this software and associated documentation files (the "Software"), to deal
 *	in the Software without restriction, including without limitation the rights
 *	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *	copies of the Software, and to permit persons to whom the Software is
 *	furnished to do so, subject to the following conditions:

 * 	The above copyright notice and this permission notice shall be included in all
 * 	copies or substantial portions of the Software.
 *
 * 	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * 	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * 	SOFTWARE.
 *
 */
const big_js_1 = __importDefault(require("big.js"));
const match_1 = require("../../type/match");
/**
 * Convert from common numeric types to JavaScript `number` type.
 * @param value
 * @returns
 *
 * @category Strong Helpers
 */
function toIntNumber(value) {
    if (value === undefined || value === null) {
        return null;
    }
    let result;
    // Converting Big -> number is generally as precision may be lost.
    // Support for Big values is provided for ease of use in cases where
    // the caller would have to convert input before calling.
    if ((0, match_1.typeMatch)(value, big_js_1.default)) {
        // Throws when Big value will not fit in number.
        try {
            result = value.toNumber();
        }
        catch (e) {
            result = null;
        }
    }
    else if (typeof value === 'string') {
        result = parseFloat(value);
    }
    else if (typeof value === 'number') {
        result = value;
    }
    else {
        result = null;
    }
    if (result === null || isNaN(result)) {
        return null;
    }
    if (result >= Number.POSITIVE_INFINITY || result <= Number.NEGATIVE_INFINITY) {
        return null;
    }
    if (result < Number.MIN_SAFE_INTEGER || result > Number.MAX_SAFE_INTEGER) {
        return null;
    }
    // Reject values with decimals.
    if (Math.floor(result) !== result) {
        return null;
    }
    return result;
}
exports.toIntNumber = toIntNumber;