<?php
namespace sammo;

class StringUtil
{
    public static function GetStrLen($str)
    {
        $count = strlen($str);
        $len = 0;
        for ($i=0; $i < $count;) {
            $code = ord($str[$i]);

            if ($code >= 0xf0) {
                $len++;
                $i += 4;
            } elseif ($code >= 0xe0) {
                $len++;
                $i += 3;
            } elseif ($code >= 0xc2) {
                $len++;
                $i += 2;
            } else {
                $len++;
                $i += 1;
            }
        }
        return $len;
    }

    public static function SubStr($str, $s, $l=1000)
    {
        $count = strlen($str);
        $startByte = 0;
        $isSet = 0;
        $endByte = $count;
        $len = 0;
        for ($i=0; $i < $count;) {
            $code = ord($str[$i]);

            if ($isSet == 0 && $len >= $s) {
                $startByte = $i;
                $isSet = 1;
            }
            if ($isSet == 1 && $len-$s >= $l) {
                $endByte = $i;
                break;
            }

            if ($code >= 0xf0) {
                $len++;
                $i += 4;
            } elseif ($code >= 0xe0) {
                $len++;
                $i += 3;
            } elseif ($code >= 0xc2) {
                $len++;
                $i += 2;
            } else {
                $len++;
                $i += 1;
            }
        }
        $str = substr($str, $startByte, $endByte-$startByte);
        return $str;
    }

    public static function SubStrForWidth($str, $s, $w)
    {
        $count = strlen($str);
        $startByte = 0;
        $isSet = 0;
        $endByte = $count;
        $last = 0;
        $len = 0;
        $width = 0;
        for ($i=0; $i < $count;) {
            $code = ord($str[$i]);

            if ($isSet == 0 && $len >= $s) {
                $startByte = $i;
                $isSet = 1;
                $width = 0;
            }
            if ($isSet == 1 && $width == $w) {
                $endByte = $i;
                break;
            }
            if ($isSet == 1 && $width > $w) {
                $endByte = $i - $last;
                break;
            }

            if ($code >= 0xf0) {
                $len++;
                $width += 2;
                $last = 4;
                $i += 4;
            } elseif ($code >= 0xe0) {
                $len++;
                $width += 2;
                $last = 3;
                $i += 3;
            } elseif ($code >= 0xc2) {
                $len++;
                $width += 2;
                $last = 2;
                $i += 2;
            } else {
                $len++;
                $width += 1;
                $last = 1;
                $i += 1;
            }
        }
        $str = substr($str, $startByte, $endByte-$startByte);
        return $str;
    }

    public static function CutStrForWidth($str, $s, $w, $ch='..')
    {
        $isCut = 0;
        $count = strlen($str);
        $startByte = 0;
        $isSet = 0;
        $endByte = $count;
        $last = 0;
        $len = 0;
        $width = 0;
        for ($i=0; $i < $count;) {
            $code = ord($str[$i]);

            if ($isSet == 0 && $len >= $s) {
                $startByte = $i;
                $isSet = 1;
                $width = 0;
            }
            if ($isSet == 1 && $width >= $w) {
                $endByte = $i - $last;
                $isCut = 1;
                break;
            }

            if ($code >= 0xf0) {
                $len++;
                $width += 2;
                $last = 4;
                $i += 4;
            } elseif ($code >= 0xe0) {
                $len++;
                $width += 2;
                $last = 3;
                $i += 3;
            } elseif ($code >= 0xc2) {
                $len++;
                $width += 2;
                $last = 2;
                $i += 2;
            } else {
                $len++;
                $width += 1;
                $last = 1;
                $i += 1;
            }
        }
        if ($isCut != 0) {
            $str = substr($str, $startByte, $endByte-$startByte) . $ch;
        }
        return $str;
    }

    //중간정렬
    public static function staticFill($str, $maxsize, $ch)
    {
        if (!$str) {
            $str = '';
        }
        $size = strlen($str);

        $count = ($maxsize - $size) / 2;
        $string = '';

        for ($i=0; $i < $count; $i++) {
            $string = $string.$ch;
        }
        $string = $string.$str;
        for ($i=0; $i < $count; $i++) {
            $string = $string.$ch;
        }
        return $string;
    }
    
    public static function Fill($str, $maxsize, $ch)
    {
        if (!$str) {
            $str = '';
        }
        $size = strlen($str);

        $count = ($maxsize - $size) / 2;
        
        $string = '';
        for ($i=0; $i < $count; $i++) {
            $string = $string.$ch;
        }
        $string = $string.$str;
        for ($i=0; $i < $count; $i++) {
            $string = $string.$ch;
        }
        return $string;
    }

    //우측정렬
    public static function Fill2($str, $maxsize, $ch='0')
    {
        if (!$str) {
            $str = '';
        }
        $size = strlen($str);

        $count = ($maxsize - $size);
        $string = '';
        for ($i=0; $i < $count; $i++) {
            $string = $string.$ch;
        }
        $string = $string.$str;

        return $string;
    }

    public static function EscapeTag($str)
    {
        $str = htmlspecialchars($str);
        $str = str_replace(["\r\n", "\r", "\n"], '<br>', $str);
//        return nl2br(htmlspecialchars($str));
//        return htmlspecialchars($str);
        return $str;
    }

    public static function removeSpecialCharacter($str)
    {
        return str_replace([
            ' ', '"', '\'', 'ⓝ', 'ⓜ', 'ⓖ', '\\', '/', '`',
            '-', '=', '[', ']', ';', ',', '.', '~', '!', '@',
            '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',
            '|', '{', '}', ':', '', '<', '>', '?', '　'
        ], '', $str);
    }
}