<?php
/**
 * Helpers.php
 *
 * -Description-
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @package    LibreNMS
 * @link       http://librenms.org
 * @copyright  2018 Tony Murray
 * @author     Tony Murray <murraytony@gmail.com>
 */

if (!function_exists('str_start')) {
    /**
     * Begin a string with a single instance of a given value.
     *
     * @param  string  $value
     * @param  string  $prefix
     * @return string
     */
    function str_start($value, $prefix)
    {
        $quoted = preg_quote($prefix, '/');
        return $prefix.preg_replace('/^(?:'.$quoted.')+/u', '', $value);
    }
}

if (!function_exists('str_finish')) {
    /**
     * Cap a string with a single instance of a given value.
     *
     * @param  string $value
     * @param  string $cap
     * @return string
     */
    function finish($value, $cap)
    {
        $quoted = preg_quote($cap, '/');
        return preg_replace('/(?:' . $quoted . ')+$/u', '', $value) . $cap;
    }
}