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✏️ Editing: CharacterSetEci.php

<?php

namespace Zxing\Common;
use Zxing\Common\AbstractEnum;
/**
 * Encapsulates a Character Set ECI, according to "Extended Channel
 * Interpretations" 5.3.1.1 of ISO 18004.
 */
final class CharacterSetECI
{
    private static $name = null;
    /**#@+
     * Character set constants.
     */
    const CP437                = 0;
    const ISO8859_1            = 1;
    const ISO8859_2            = 4;
    const ISO8859_3            = 5;
    const ISO8859_4            = 6;
    const ISO8859_5            = 7;
    const ISO8859_6            = 8;
    const ISO8859_7            = 9;
    const ISO8859_8            = 10;
    const ISO8859_9            = 11;
    const ISO8859_10           = 12;
    const ISO8859_11           = 13;
    const ISO8859_12           = 14;
    const ISO8859_13           = 15;
    const ISO8859_14           = 16;
    const ISO8859_15           = 17;
    const ISO8859_16           = 18;
    const SJIS                 = 20;
    const CP1250               = 21;
    const CP1251               = 22;
    const CP1252               = 23;
    const CP1256               = 24;
    const UNICODE_BIG_UNMARKED = 25;
    const UTF8                 = 26;
    const ASCII                = 27;
    const BIG5                 = 28;
    const GB18030              = 29;
    const EUC_KR               = 30;
    /**#@-*/
    /**
     * Map between character names and their ECI values.
     *
     * @var array
     */
    protected static $nameToEci = array(
        'ISO-8859-1'   => self::ISO8859_1,
        'ISO-8859-2'   => self::ISO8859_2,
        'ISO-8859-3'   => self::ISO8859_3,
        'ISO-8859-4'   => self::ISO8859_4,
        'ISO-8859-5'   => self::ISO8859_5,
        'ISO-8859-6'   => self::ISO8859_6,
        'ISO-8859-7'   => self::ISO8859_7,
        'ISO-8859-8'   => self::ISO8859_8,
        'ISO-8859-9'   => self::ISO8859_9,
        'ISO-8859-10'  => self::ISO8859_10,
        'ISO-8859-11'  => self::ISO8859_11,
        'ISO-8859-12'  => self::ISO8859_12,
        'ISO-8859-13'  => self::ISO8859_13,
        'ISO-8859-14'  => self::ISO8859_14,
        'ISO-8859-15'  => self::ISO8859_15,
        'ISO-8859-16'  => self::ISO8859_16,
        'SHIFT-JIS'    => self::SJIS,
        'WINDOWS-1250' => self::CP1250,
        'WINDOWS-1251' => self::CP1251,
        'WINDOWS-1252' => self::CP1252,
        'WINDOWS-1256' => self::CP1256,
        'UTF-16BE'     => self::UNICODE_BIG_UNMARKED,
        'UTF-8'        => self::UTF8,
        'ASCII'        => self::ASCII,
        'GBK'          => self::GB18030,
        'EUC-KR'       => self::EUC_KR,
    );
    /**
     * Additional possible values for character sets.
     *
     * @var array
     */
    protected static $additionalValues = array(
        self::CP437 => 2,
        self::ASCII => 170,
    );
    /**
     * Gets character set ECI by value.
     *
     * @param  string $name
     * @return CharacterSetEci|null
     */
    public static function getCharacterSetECIByValue($value)
    {
        if ($value < 0 || $value >= 900) {
            throw new Exception\InvalidArgumentException('Value must be between 0 and 900');
        }
        if (false !== ($key = array_search($value, self::$additionalValues))) {
            $value = $key;
        }
        array_search($value, self::$nameToEci);
        try 
        {
            self::setName($value);
            return new self($value);
        } catch (Exception\UnexpectedValueException $e) {
            return null;
        }
    }

private static function setName($value)
    {
        foreach (self::$nameToEci as $name => $key) {
            if($key == $value)
            {
                self::$name = $name;
                return true;
            }
        }
        if(self::$name == null)
        {
            foreach (self::$additionalValues as $name => $key) {
                if($key == $value)
                {
                    self::$name = $name;
                    return true;
                }
            }
        }
    }
    /**
     * Gets character set ECI name.
     *
     * @return character set ECI name|null
     */
    public static function name()
    {
        return self::$name;
    }
    /**
     * Gets character set ECI by name.
     *
     * @param  string $name
     * @return CharacterSetEci|null
     */
    public static function getCharacterSetECIByName($name)
    {
        $name = strtoupper($name);
        if (isset(self::$nameToEci[$name])) {
            return new self(self::$nameToEci[$name]);
        }
        return null;
    }
}

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