<?php
    /*****************************************************************************
    IP Reg, a PHP/MySQL IPAM tool
    Copyright (C) 2007-2009 Wietse Warendorff

    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/>.

    For more information, visit http://sourceforge.net/projects/ipreg,
    or contact me at wietsew@users.sourceforge.net
    *****************************************************************************/

    // strip mac address to 12 char string
    function strip_mac($mac) {
        // strip chars we don't need
        $mac = preg_replace("|[^a-fA-F0-9]|", "", $mac);

        // capitalize (just because it looks better eh)
        $mac = strtoupper($mac);

        // and return
        return ($mac);
    }

    // rebuild mac address
    function write_mac($mac) {
        // check string length
        if (strlen($mac)!=12) {
            // if the MAC is empty, or for whatever reason incorrect, just return
            return $mac;
        } else {
            // count to 12...
            for($i=0;$i<12;$i++) {
                // ... and strip mac to pieces
                ${"mac".$i} = $mac{$i};
            }

            // get user preference
            $user_mac = $_SESSION['suser_mac'];

            // count to 12 again...
            for($i=0;$i<12;$i++) {
                // ... and replace user preference with pieces
                $user_mac = preg_replace("/x/", ${"mac".$i}, $user_mac, 1);
            }

            // and return
            return $user_mac;
        }
    }

    // redirect page
    function header_location($location) {
        // send header
        header("location: " . $location);

        // exit to be sure
        exit;
    }

    // sanitize input
    function sanitize($input) {
        global $dblink;

        // trim whitespaces
        $input = @trim($input);

        // magic quotes enabled?
        if(get_magic_quotes_gpc()) {
            // strip slashes
            $input = stripslashes($input);
        }

        // convert to utf-8
        iconv("UTF-8", "UTF-8", $input);

        // convert special chars
        $input = htmlentities($input,ENT_QUOTES,'UTF-8');

        // make sql ready
        $input = mysqli_real_escape_string($dblink, $input);

        // and return
        return $input;
    }

    function mysql_nullstring($input) {
        if (isset($input)) {
            return $input;
        } else {
            return '';
        }
    }

    function lang_getfrombrowser ($allowed_languages, $default_language, $lang_variable = null, $strict_mode = true) {
        if ($lang_variable === null) {
            $lang_variable = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
        }
        if (empty($lang_variable)) {
            return $default_language;
        }
        $accepted_languages = preg_split('/,\s*/', $lang_variable);
        $current_lang = $default_language;
        $current_q = 0;
        foreach ($accepted_languages as $accepted_language) {
            $res = preg_match ('/^([a-z]{1,8}(?:-[a-z]{1,8})*)(?:;\s*q=(0(?:\.[0-9]{1,3})?|1(?:\.0{1,3})?))?$/i',
                       $accepted_language, $matches);
            if (!$res) {
                continue;
            }
            $lang_code = explode ('-', $matches[1]);
            if (isset($matches[2])) {
                $lang_quality = (float)$matches[2];
            } else {
                $lang_quality = 1.0;
            }
            while (count ($lang_code)) {
                if (in_array (strtolower (join ('-', $lang_code)), $allowed_languages)) {
                    if ($lang_quality > $current_q) {
                        $current_lang = strtolower (join ('-', $lang_code));
                        $current_q = $lang_quality;
                        break;
                    }
                }
                if ($strict_mode) {
                    break;
                }
                array_pop ($lang_code);
            }
        }
        return $current_lang;
    }

    function print_tree_rec($tree, $level) {
        $output = '<ul class="treelvl' . $level. '">' . "\n";
        foreach ($tree as $node) {
            $output .= '<li><a href="' . $node['href'] . '">' . $node['value'] . '</a>';
            if ($node['children']) {
                $output .= "\n" . print_tree_rec($node['children'], $level+1);
            }
            $output .= "</li>\n";
        }
        $output .= "</ul>\n";
        return $output;
    }

    function print_tree ($params, &$smarty) {
        if (empty($params['level'])) {
            $level = 0;
        } else {
            $level = $params['level'];
        }
        if (empty($params['tree'])) {
            return '';
        } else {
            return print_tree_rec($params['tree'], $level);
        }
    }

?>