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<?php
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/**
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 * This file is part of FPDI
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 *
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 * @package   setasign\Fpdi
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 * @copyright Copyright (c) 2023 Setasign GmbH & Co. KG (https://www.setasign.com)
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 * @license   http://opensource.org/licenses/mit-license The MIT License
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 */
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namespace setasign\Fpdi\PdfParser\Type;
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use setasign\Fpdi\PdfParser\StreamReader;
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use setasign\Fpdi\PdfParser\Tokenizer;
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/**
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 * Class representing a PDF name object
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 */
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class PdfName extends PdfType
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{
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    /**
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     * Parses a name object from the passed tokenizer and stream-reader.
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     *
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     * @param Tokenizer $tokenizer
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     * @param StreamReader $streamReader
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     * @return self
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     */
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    public static function parse(Tokenizer $tokenizer, StreamReader $streamReader)
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    {
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        $v = new self();
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        if (\strspn($streamReader->getByte(), "\x00\x09\x0A\x0C\x0D\x20()<>[]{}/%") === 0) {
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            $v->value = (string) $tokenizer->getNextToken();
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            return $v;
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        }
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        $v->value = '';
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        return $v;
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    }
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    /**
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     * Unescapes a name string.
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     *
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     * @param string $value
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     * @return string
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     */
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    public static function unescape($value)
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    {
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        if (strpos($value, '#') === false) {
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            return $value;
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        }
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        return preg_replace_callback('/#([a-fA-F\d]{2})/', function ($matches) {
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            return chr(hexdec($matches[1]));
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        }, $value);
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    }
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    /**
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     * Helper method to create an instance.
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     *
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     * @param string $string
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     * @return self
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     */
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    public static function create($string)
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    {
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        $v = new self();
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        $v->value = $string;
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        return $v;
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    }
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    /**
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     * Ensures that the passed value is a PdfName instance.
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     *
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     * @param mixed $name
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     * @return self
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     * @throws PdfTypeException
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     */
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    public static function ensure($name)
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    {
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        return PdfType::ensureType(self::class, $name, 'Name value expected.');
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    }
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}