<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2011 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS\HTML\Helpers;

\defined('JPATH_PLATFORM') or die;

/**
 * HTML helper class for rendering telephone numbers.
 *
 * @since  1.6
 */
abstract class Telephone
{
	/**
	 * Converts strings of integers into more readable telephone format
	 *
	 * By default, the ITU-T format will automatically be used.
	 * However, one of the allowed unit types may also be used instead.
	 *
	 * @param   integer  $number       The integers in a phone number with dot separated country code
	 *                                 ccc.nnnnnnn where ccc represents country code and nnn represents the local number.
	 * @param   string   $displayplan  The numbering plan used to display the numbers.
	 *
	 * @return  string  The formatted telephone number.
	 *
	 * @see     \Joomla\CMS\Form\Rule\TelRule
	 * @since   1.6
	 */
	public static function tel($number, $displayplan)
	{
		$number = explode('.', $number);
		$countrycode = $number[0];
		$number = $number[1];

		if ($displayplan === 'ITU-T' || $displayplan === 'International' || $displayplan === 'int' || $displayplan === 'missdn' || $displayplan == null)
		{
			$display[0] = '+';
			$display[1] = $countrycode;
			$display[2] = ' ';
			$display[3] = implode(' ', str_split($number, 2));
		}
		elseif ($displayplan === 'NANP' || $displayplan === 'northamerica' || $displayplan === 'US')
		{
			$display[0] = '(';
			$display[1] = substr($number, 0, 3);
			$display[2] = ') ';
			$display[3] = substr($number, 3, 3);
			$display[4] = '-';
			$display[5] = substr($number, 6, 4);
		}
		elseif ($displayplan === 'EPP' || $displayplan === 'IETF')
		{
			$display[0] = '+';
			$display[1] = $countrycode;
			$display[2] = '.';
			$display[3] = $number;
		}
		elseif ($displayplan === 'ARPA' || $displayplan === 'ENUM')
		{
			$number = implode('.', str_split(strrev($number), 1));
			$display[0] = '+';
			$display[1] = $number;
			$display[2] = '.';
			$display[3] = $countrycode;
			$display[4] = '.e164.arpa';
		}

		return implode('', $display);
	}
}
