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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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namespace factor_sms;
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/**
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* Helper class for shared sms gateway functions
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*
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* @package factor_sms
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* @author Alex Morris <alex.morris@catalyst.net.nz>
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* @copyright Catalyst IT
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class helper {
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/**
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* This function internationalises a number to E.164 standard.
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* https://46elks.com/kb/e164
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*
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* @param string $phonenumber the phone number to format.
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* @return string the formatted phone number.
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*/
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public static function format_number(string $phonenumber): string {
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// Remove all whitespace, dashes and brackets.
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$phonenumber = preg_replace('/[ \(\)-]/', '', $phonenumber);
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// Number is already in international format. Do nothing.
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if (str_starts_with ($phonenumber, '+')) {
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return $phonenumber;
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}
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// Strip leading 0 if found.
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if (str_starts_with ($phonenumber, '0')) {
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$phonenumber = substr($phonenumber, 1);
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}
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// Prepend country code.
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$countrycode = get_config('factor_sms', 'countrycode');
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$phonenumber = !empty($countrycode) ? '+' . $countrycode . $phonenumber : $phonenumber;
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return $phonenumber;
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}
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/**
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* Validate phone number with E.164 format. https://en.wikipedia.org/wiki/E.164
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*
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* @param string $phonenumber from the given user input
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* @return bool
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*/
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public static function is_valid_phonenumber(string $phonenumber): bool {
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$phonenumber = self::format_number($phonenumber);
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return (preg_match("/^\+[1-9]\d{1,14}$/", $phonenumber)) ? true : false;
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}
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}
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