<?php
/**
 * Part of the woobooking Framework String Package
 *
 * Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE
 */
namespace WpBookingHotel\String;
use WpBookingHotel\String\StringHelper;

/**
 * String handling class for utf-8 data
 * Wraps the phputf8 library
 * All functions assume the validity of utf-8 strings.
 *
 * @since       1.0
 * @deprecated  2.0  Use StringHelper instead
 */
class NBString extends StringHelper
{


//--------------------------------------------------------------------
    /**
     * Unicode aware replacement for strlen(). Returns the number
     * of characters in the string (not the number of bytes), replacing
     * multibyte characters with a single byte equivalent
     * utf8_decode() converts characters that are not in ISO-8859-1
     * to '?', which, for the purpose of counting, is alright - It's
     * much faster than iconv_strlen
     * Note: this function does not count bad UTF-8 bytes in the string
     * - these are simply ignored
     * @author <chernyshevsky at hotmail dot com>
     * @link   http://www.php.net/manual/en/function.strlen.php
     * @link   http://www.php.net/manual/en/function.utf8-decode.php
     * @param string UTF-8 string
     * @return int number of UTF-8 characters in string
     * @package utf8
     */
    function utf8_strlen($str){
        return strlen(utf8_decode($str));
    }


//--------------------------------------------------------------------
    /**
     * UTF-8 aware alternative to strpos
     * Find position of first occurrence of a string
     * Note: This will get alot slower if offset is used
     * Note: requires utf8_strlen amd utf8_substr to be loaded
     * @param string haystack
     * @param string needle (you should validate this with utf8_is_valid)
     * @param integer offset in characters (from left)
     * @return mixed integer position or FALSE on failure
     * @see http://www.php.net/strpos
     * @see utf8_strlen
     * @see utf8_substr
     * @package utf8
     */
    public static function utf8_strpos($str, $needle, $offset = NULL) {

        if ( is_null($offset) ) {

            $ar = explode($needle, $str, 2);
            if ( count($ar) > 1 ) {
                return utf8_strlen($ar[0]);
            }
            return FALSE;

        } else {

            if ( !is_int($offset) ) {
                trigger_error('utf8_strpos: Offset must be an integer',E_USER_ERROR);
                return FALSE;
            }

            $str = utf8_substr($str, $offset);

            if ( FALSE !== ( $pos = utf8_strpos($str, $needle) ) ) {
                return $pos + $offset;
            }

            return FALSE;
        }

    }

//--------------------------------------------------------------------
    /**
     * UTF-8 aware alternative to strrpos
     * Find position of last occurrence of a char in a string
     * Note: This will get alot slower if offset is used
     * Note: requires utf8_substr and utf8_strlen to be loaded
     * @param string haystack
     * @param string needle (you should validate this with utf8_is_valid)
     * @param integer (optional) offset (from left)
     * @return mixed integer position or FALSE on failure
     * @see http://www.php.net/strrpos
     * @see utf8_substr
     * @see utf8_strlen
     * @package utf8
     */
    function utf8_strrpos($str, $needle, $offset = NULL) {

        if ( is_null($offset) ) {

            $ar = explode($needle, $str);

            if ( count($ar) > 1 ) {
                // Pop off the end of the string where the last match was made
                array_pop($ar);
                $str = join($needle,$ar);
                return utf8_strlen($str);
            }
            return FALSE;

        } else {

            if ( !is_int($offset) ) {
                trigger_error('utf8_strrpos expects parameter 3 to be long',E_USER_WARNING);
                return FALSE;
            }

            $str = utf8_substr($str, $offset);

            if ( FALSE !== ( $pos = utf8_strrpos($str, $needle) ) ) {
                return $pos + $offset;
            }

            return FALSE;
        }

    }

//--------------------------------------------------------------------
    /**
     * UTF-8 aware alternative to substr
     * Return part of a string given character offset (and optionally length)
     *
     * Note arguments: comparied to substr - if offset or length are
     * not integers, this version will not complain but rather massages them
     * into an integer.
     *
     * Note on returned values: substr documentation states false can be
     * returned in some cases (e.g. offset > string length)
     * mb_substr never returns false, it will return an empty string instead.
     * This adopts the mb_substr approach
     *
     * Note on implementation: PCRE only supports repetitions of less than
     * 65536, in order to accept up to MAXINT values for offset and length,
     * we'll repeat a group of 65535 characters when needed.
     *
     * Note on implementation: calculating the number of characters in the
     * string is a relatively expensive operation, so we only carry it out when
     * necessary. It isn't necessary for +ve offsets and no specified length
     *
     * @author Chris Smith<chris@jalakai.co.uk>
     * @param string
     * @param integer number of UTF-8 characters offset (from left)
     * @param integer (optional) length in UTF-8 characters from offset
     * @return mixed string or FALSE if failure
     * @package utf8
     */
    function utf8_substr($str, $offset, $length = NULL) {

        // generates E_NOTICE
        // for PHP4 objects, but not PHP5 objects
        $str = (string)$str;
        $offset = (int)$offset;
        if (!is_null($length)) $length = (int)$length;

        // handle trivial cases
        if ($length === 0) return '';
        if ($offset < 0 && $length < 0 && $length < $offset)
            return '';

        // normalise negative offsets (we could use a tail
        // anchored pattern, but they are horribly slow!)
        if ($offset < 0) {

            // see notes
            $strlen = strlen(utf8_decode($str));
            $offset = $strlen + $offset;
            if ($offset < 0) $offset = 0;

        }

        $Op = '';
        $Lp = '';

        // establish a pattern for offset, a
        // non-captured group equal in length to offset
        if ($offset > 0) {

            $Ox = (int)($offset/65535);
            $Oy = $offset%65535;

            if ($Ox) {
                $Op = '(?:.{65535}){'.$Ox.'}';
            }

            $Op = '^(?:'.$Op.'.{'.$Oy.'})';

        } else {

            // offset == 0; just anchor the pattern
            $Op = '^';

        }

        // establish a pattern for length
        if (is_null($length)) {

            // the rest of the string
            $Lp = '(.*)$';

        } else {

            if (!isset($strlen)) {
                // see notes
                $strlen = strlen(utf8_decode($str));
            }

            // another trivial case
            if ($offset > $strlen) return '';

            if ($length > 0) {

                // reduce any length that would
                // go passed the end of the string
                $length = min($strlen-$offset, $length);

                $Lx = (int)( $length / 65535 );
                $Ly = $length % 65535;

                // negative length requires a captured group
                // of length characters
                if ($Lx) $Lp = '(?:.{65535}){'.$Lx.'}';
                $Lp = '('.$Lp.'.{'.$Ly.'})';

            } else if ($length < 0) {

                if ( $length < ($offset - $strlen) ) {
                    return '';
                }

                $Lx = (int)((-$length)/65535);
                $Ly = (-$length)%65535;

                // negative length requires ... capture everything
                // except a group of  -length characters
                // anchored at the tail-end of the string
                if ($Lx) $Lp = '(?:.{65535}){'.$Lx.'}';
                $Lp = '(.*)(?:'.$Lp.'.{'.$Ly.'})$';

            }

        }

        if (!preg_match( '#'.$Op.$Lp.'#us',$str, $match )) {
            return '';
        }

        return $match[1];

    }

//---------------------------------------------------------------
    /**
     * UTF-8 aware alternative to strtolower
     * Make a string lowercase
     * Note: The concept of a characters "case" only exists is some alphabets
     * such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does
     * not exist in the Chinese alphabet, for example. See Unicode Standard
     * Annex #21: Case Mappings
     * Note: requires utf8_to_unicode and utf8_from_unicode
     * @author Andreas Gohr <andi@splitbrain.org>
     * @param string
     * @return mixed either string in lowercase or FALSE is UTF-8 invalid
     * @see http://www.php.net/strtolower
     * @see utf8_to_unicode
     * @see utf8_from_unicode
     * @see http://www.unicode.org/reports/tr21/tr21-5.html
     * @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
     * @package utf8
     */
    function utf8_strtolower($string){

        static $UTF8_UPPER_TO_LOWER = NULL;

        if ( is_null($UTF8_UPPER_TO_LOWER) ) {
            $UTF8_UPPER_TO_LOWER = array(
                0x0041=>0x0061, 0x03A6=>0x03C6, 0x0162=>0x0163, 0x00C5=>0x00E5, 0x0042=>0x0062,
                0x0139=>0x013A, 0x00C1=>0x00E1, 0x0141=>0x0142, 0x038E=>0x03CD, 0x0100=>0x0101,
                0x0490=>0x0491, 0x0394=>0x03B4, 0x015A=>0x015B, 0x0044=>0x0064, 0x0393=>0x03B3,
                0x00D4=>0x00F4, 0x042A=>0x044A, 0x0419=>0x0439, 0x0112=>0x0113, 0x041C=>0x043C,
                0x015E=>0x015F, 0x0143=>0x0144, 0x00CE=>0x00EE, 0x040E=>0x045E, 0x042F=>0x044F,
                0x039A=>0x03BA, 0x0154=>0x0155, 0x0049=>0x0069, 0x0053=>0x0073, 0x1E1E=>0x1E1F,
                0x0134=>0x0135, 0x0427=>0x0447, 0x03A0=>0x03C0, 0x0418=>0x0438, 0x00D3=>0x00F3,
                0x0420=>0x0440, 0x0404=>0x0454, 0x0415=>0x0435, 0x0429=>0x0449, 0x014A=>0x014B,
                0x0411=>0x0431, 0x0409=>0x0459, 0x1E02=>0x1E03, 0x00D6=>0x00F6, 0x00D9=>0x00F9,
                0x004E=>0x006E, 0x0401=>0x0451, 0x03A4=>0x03C4, 0x0423=>0x0443, 0x015C=>0x015D,
                0x0403=>0x0453, 0x03A8=>0x03C8, 0x0158=>0x0159, 0x0047=>0x0067, 0x00C4=>0x00E4,
                0x0386=>0x03AC, 0x0389=>0x03AE, 0x0166=>0x0167, 0x039E=>0x03BE, 0x0164=>0x0165,
                0x0116=>0x0117, 0x0108=>0x0109, 0x0056=>0x0076, 0x00DE=>0x00FE, 0x0156=>0x0157,
                0x00DA=>0x00FA, 0x1E60=>0x1E61, 0x1E82=>0x1E83, 0x00C2=>0x00E2, 0x0118=>0x0119,
                0x0145=>0x0146, 0x0050=>0x0070, 0x0150=>0x0151, 0x042E=>0x044E, 0x0128=>0x0129,
                0x03A7=>0x03C7, 0x013D=>0x013E, 0x0422=>0x0442, 0x005A=>0x007A, 0x0428=>0x0448,
                0x03A1=>0x03C1, 0x1E80=>0x1E81, 0x016C=>0x016D, 0x00D5=>0x00F5, 0x0055=>0x0075,
                0x0176=>0x0177, 0x00DC=>0x00FC, 0x1E56=>0x1E57, 0x03A3=>0x03C3, 0x041A=>0x043A,
                0x004D=>0x006D, 0x016A=>0x016B, 0x0170=>0x0171, 0x0424=>0x0444, 0x00CC=>0x00EC,
                0x0168=>0x0169, 0x039F=>0x03BF, 0x004B=>0x006B, 0x00D2=>0x00F2, 0x00C0=>0x00E0,
                0x0414=>0x0434, 0x03A9=>0x03C9, 0x1E6A=>0x1E6B, 0x00C3=>0x00E3, 0x042D=>0x044D,
                0x0416=>0x0436, 0x01A0=>0x01A1, 0x010C=>0x010D, 0x011C=>0x011D, 0x00D0=>0x00F0,
                0x013B=>0x013C, 0x040F=>0x045F, 0x040A=>0x045A, 0x00C8=>0x00E8, 0x03A5=>0x03C5,
                0x0046=>0x0066, 0x00DD=>0x00FD, 0x0043=>0x0063, 0x021A=>0x021B, 0x00CA=>0x00EA,
                0x0399=>0x03B9, 0x0179=>0x017A, 0x00CF=>0x00EF, 0x01AF=>0x01B0, 0x0045=>0x0065,
                0x039B=>0x03BB, 0x0398=>0x03B8, 0x039C=>0x03BC, 0x040C=>0x045C, 0x041F=>0x043F,
                0x042C=>0x044C, 0x00DE=>0x00FE, 0x00D0=>0x00F0, 0x1EF2=>0x1EF3, 0x0048=>0x0068,
                0x00CB=>0x00EB, 0x0110=>0x0111, 0x0413=>0x0433, 0x012E=>0x012F, 0x00C6=>0x00E6,
                0x0058=>0x0078, 0x0160=>0x0161, 0x016E=>0x016F, 0x0391=>0x03B1, 0x0407=>0x0457,
                0x0172=>0x0173, 0x0178=>0x00FF, 0x004F=>0x006F, 0x041B=>0x043B, 0x0395=>0x03B5,
                0x0425=>0x0445, 0x0120=>0x0121, 0x017D=>0x017E, 0x017B=>0x017C, 0x0396=>0x03B6,
                0x0392=>0x03B2, 0x0388=>0x03AD, 0x1E84=>0x1E85, 0x0174=>0x0175, 0x0051=>0x0071,
                0x0417=>0x0437, 0x1E0A=>0x1E0B, 0x0147=>0x0148, 0x0104=>0x0105, 0x0408=>0x0458,
                0x014C=>0x014D, 0x00CD=>0x00ED, 0x0059=>0x0079, 0x010A=>0x010B, 0x038F=>0x03CE,
                0x0052=>0x0072, 0x0410=>0x0430, 0x0405=>0x0455, 0x0402=>0x0452, 0x0126=>0x0127,
                0x0136=>0x0137, 0x012A=>0x012B, 0x038A=>0x03AF, 0x042B=>0x044B, 0x004C=>0x006C,
                0x0397=>0x03B7, 0x0124=>0x0125, 0x0218=>0x0219, 0x00DB=>0x00FB, 0x011E=>0x011F,
                0x041E=>0x043E, 0x1E40=>0x1E41, 0x039D=>0x03BD, 0x0106=>0x0107, 0x03AB=>0x03CB,
                0x0426=>0x0446, 0x00DE=>0x00FE, 0x00C7=>0x00E7, 0x03AA=>0x03CA, 0x0421=>0x0441,
                0x0412=>0x0432, 0x010E=>0x010F, 0x00D8=>0x00F8, 0x0057=>0x0077, 0x011A=>0x011B,
                0x0054=>0x0074, 0x004A=>0x006A, 0x040B=>0x045B, 0x0406=>0x0456, 0x0102=>0x0103,
                0x039B=>0x03BB, 0x00D1=>0x00F1, 0x041D=>0x043D, 0x038C=>0x03CC, 0x00C9=>0x00E9,
                0x00D0=>0x00F0, 0x0407=>0x0457, 0x0122=>0x0123,
            );
        }

        $uni = utf8_to_unicode($string);

        if ( !$uni ) {
            return FALSE;
        }

        $cnt = count($uni);
        for ($i=0; $i < $cnt; $i++){
            if ( isset($UTF8_UPPER_TO_LOWER[$uni[$i]]) ) {
                $uni[$i] = $UTF8_UPPER_TO_LOWER[$uni[$i]];
            }
        }

        return utf8_from_unicode($uni);
    }

//---------------------------------------------------------------
    /**
     * UTF-8 aware alternative to strtoupper
     * Make a string uppercase
     * Note: The concept of a characters "case" only exists is some alphabets
     * such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does
     * not exist in the Chinese alphabet, for example. See Unicode Standard
     * Annex #21: Case Mappings
     * Note: requires utf8_to_unicode and utf8_from_unicode
     * @author Andreas Gohr <andi@splitbrain.org>
     * @param string
     * @return mixed either string in lowercase or FALSE is UTF-8 invalid
     * @see http://www.php.net/strtoupper
     * @see utf8_to_unicode
     * @see utf8_from_unicode
     * @see http://www.unicode.org/reports/tr21/tr21-5.html
     * @see http://dev.splitbrain.org/view/darcs/dokuwiki/inc/utf8.php
     * @package utf8
     */
    function utf8_strtoupper($string){

        static $UTF8_LOWER_TO_UPPER = NULL;

        if ( is_null($UTF8_LOWER_TO_UPPER) ) {
            $UTF8_LOWER_TO_UPPER = array(
                0x0061=>0x0041, 0x03C6=>0x03A6, 0x0163=>0x0162, 0x00E5=>0x00C5, 0x0062=>0x0042,
                0x013A=>0x0139, 0x00E1=>0x00C1, 0x0142=>0x0141, 0x03CD=>0x038E, 0x0101=>0x0100,
                0x0491=>0x0490, 0x03B4=>0x0394, 0x015B=>0x015A, 0x0064=>0x0044, 0x03B3=>0x0393,
                0x00F4=>0x00D4, 0x044A=>0x042A, 0x0439=>0x0419, 0x0113=>0x0112, 0x043C=>0x041C,
                0x015F=>0x015E, 0x0144=>0x0143, 0x00EE=>0x00CE, 0x045E=>0x040E, 0x044F=>0x042F,
                0x03BA=>0x039A, 0x0155=>0x0154, 0x0069=>0x0049, 0x0073=>0x0053, 0x1E1F=>0x1E1E,
                0x0135=>0x0134, 0x0447=>0x0427, 0x03C0=>0x03A0, 0x0438=>0x0418, 0x00F3=>0x00D3,
                0x0440=>0x0420, 0x0454=>0x0404, 0x0435=>0x0415, 0x0449=>0x0429, 0x014B=>0x014A,
                0x0431=>0x0411, 0x0459=>0x0409, 0x1E03=>0x1E02, 0x00F6=>0x00D6, 0x00F9=>0x00D9,
                0x006E=>0x004E, 0x0451=>0x0401, 0x03C4=>0x03A4, 0x0443=>0x0423, 0x015D=>0x015C,
                0x0453=>0x0403, 0x03C8=>0x03A8, 0x0159=>0x0158, 0x0067=>0x0047, 0x00E4=>0x00C4,
                0x03AC=>0x0386, 0x03AE=>0x0389, 0x0167=>0x0166, 0x03BE=>0x039E, 0x0165=>0x0164,
                0x0117=>0x0116, 0x0109=>0x0108, 0x0076=>0x0056, 0x00FE=>0x00DE, 0x0157=>0x0156,
                0x00FA=>0x00DA, 0x1E61=>0x1E60, 0x1E83=>0x1E82, 0x00E2=>0x00C2, 0x0119=>0x0118,
                0x0146=>0x0145, 0x0070=>0x0050, 0x0151=>0x0150, 0x044E=>0x042E, 0x0129=>0x0128,
                0x03C7=>0x03A7, 0x013E=>0x013D, 0x0442=>0x0422, 0x007A=>0x005A, 0x0448=>0x0428,
                0x03C1=>0x03A1, 0x1E81=>0x1E80, 0x016D=>0x016C, 0x00F5=>0x00D5, 0x0075=>0x0055,
                0x0177=>0x0176, 0x00FC=>0x00DC, 0x1E57=>0x1E56, 0x03C3=>0x03A3, 0x043A=>0x041A,
                0x006D=>0x004D, 0x016B=>0x016A, 0x0171=>0x0170, 0x0444=>0x0424, 0x00EC=>0x00CC,
                0x0169=>0x0168, 0x03BF=>0x039F, 0x006B=>0x004B, 0x00F2=>0x00D2, 0x00E0=>0x00C0,
                0x0434=>0x0414, 0x03C9=>0x03A9, 0x1E6B=>0x1E6A, 0x00E3=>0x00C3, 0x044D=>0x042D,
                0x0436=>0x0416, 0x01A1=>0x01A0, 0x010D=>0x010C, 0x011D=>0x011C, 0x00F0=>0x00D0,
                0x013C=>0x013B, 0x045F=>0x040F, 0x045A=>0x040A, 0x00E8=>0x00C8, 0x03C5=>0x03A5,
                0x0066=>0x0046, 0x00FD=>0x00DD, 0x0063=>0x0043, 0x021B=>0x021A, 0x00EA=>0x00CA,
                0x03B9=>0x0399, 0x017A=>0x0179, 0x00EF=>0x00CF, 0x01B0=>0x01AF, 0x0065=>0x0045,
                0x03BB=>0x039B, 0x03B8=>0x0398, 0x03BC=>0x039C, 0x045C=>0x040C, 0x043F=>0x041F,
                0x044C=>0x042C, 0x00FE=>0x00DE, 0x00F0=>0x00D0, 0x1EF3=>0x1EF2, 0x0068=>0x0048,
                0x00EB=>0x00CB, 0x0111=>0x0110, 0x0433=>0x0413, 0x012F=>0x012E, 0x00E6=>0x00C6,
                0x0078=>0x0058, 0x0161=>0x0160, 0x016F=>0x016E, 0x03B1=>0x0391, 0x0457=>0x0407,
                0x0173=>0x0172, 0x00FF=>0x0178, 0x006F=>0x004F, 0x043B=>0x041B, 0x03B5=>0x0395,
                0x0445=>0x0425, 0x0121=>0x0120, 0x017E=>0x017D, 0x017C=>0x017B, 0x03B6=>0x0396,
                0x03B2=>0x0392, 0x03AD=>0x0388, 0x1E85=>0x1E84, 0x0175=>0x0174, 0x0071=>0x0051,
                0x0437=>0x0417, 0x1E0B=>0x1E0A, 0x0148=>0x0147, 0x0105=>0x0104, 0x0458=>0x0408,
                0x014D=>0x014C, 0x00ED=>0x00CD, 0x0079=>0x0059, 0x010B=>0x010A, 0x03CE=>0x038F,
                0x0072=>0x0052, 0x0430=>0x0410, 0x0455=>0x0405, 0x0452=>0x0402, 0x0127=>0x0126,
                0x0137=>0x0136, 0x012B=>0x012A, 0x03AF=>0x038A, 0x044B=>0x042B, 0x006C=>0x004C,
                0x03B7=>0x0397, 0x0125=>0x0124, 0x0219=>0x0218, 0x00FB=>0x00DB, 0x011F=>0x011E,
                0x043E=>0x041E, 0x1E41=>0x1E40, 0x03BD=>0x039D, 0x0107=>0x0106, 0x03CB=>0x03AB,
                0x0446=>0x0426, 0x00FE=>0x00DE, 0x00E7=>0x00C7, 0x03CA=>0x03AA, 0x0441=>0x0421,
                0x0432=>0x0412, 0x010F=>0x010E, 0x00F8=>0x00D8, 0x0077=>0x0057, 0x011B=>0x011A,
                0x0074=>0x0054, 0x006A=>0x004A, 0x045B=>0x040B, 0x0456=>0x0406, 0x0103=>0x0102,
                0x03BB=>0x039B, 0x00F1=>0x00D1, 0x043D=>0x041D, 0x03CC=>0x038C, 0x00E9=>0x00C9,
                0x00F0=>0x00D0, 0x0457=>0x0407, 0x0123=>0x0122,
            );
        }

        $uni = utf8_to_unicode($string);

        if ( !$uni ) {
            return FALSE;
        }

        $cnt = count($uni);
        for ($i=0; $i < $cnt; $i++){
            if( isset($UTF8_LOWER_TO_UPPER[$uni[$i]]) ) {
                $uni[$i] = $UTF8_LOWER_TO_UPPER[$uni[$i]];
            }
        }

        return utf8_from_unicode($uni);
    }
}
