/**
 * @copyright Copyright (c) 2021 Joas Schilling <coding@schilljs.com>
 *
 * @license AGPL-3.0-or-later
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

const readableNumber = {
	methods: {
		/**
		 * Splits a number into chunks of 3 digits (single digit as last is merged into the previous chunk):
		 * Samples:
		 * 9432670 => 943 2670
		 * 94326702 => 943 267 02
		 * 943267028 => 943 267 028
		 * 9432670284 => 943 267 0284
		 *
		 * @param {string} number The number to make readable
		 * @return {string}
		 */
		readableNumber(number) {
			const chunks = this.stringChop(number, 3)
			const lastChunk = chunks.pop()
			if (lastChunk.length === 1) {
				return chunks.join(' ') + lastChunk
			}
			return chunks.join(' ') + ' ' + lastChunk
		},

		/**
		 * Copied from https://www.w3resource.com/javascript-exercises/javascript-string-exercise-17.php
		 *
		 * @param {string} str The string to chop
		 * @param {number} size Size of the chunks
		 * @return {string[]}
		 */
		stringChop(str, size) {
			str = String(str)
			size = ~~size
			return size > 0 ? str.match(new RegExp('.{1,' + size + '}', 'g')) : [str]
		},
	},
}

export default readableNumber