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<?php |
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namespace PhpZip\Constants; |
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use PhpZip\Exception\ZipUnsupportMethodException; |
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/** |
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* Class ZipCompressionMethod. |
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*/ |
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final class ZipCompressionMethod |
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{ |
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/** @var int Compression method Store */ |
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const STORED = 0; |
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/** @var int Compression method Deflate */ |
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const DEFLATED = 8; |
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/** @var int Compression method Bzip2 */ |
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const BZIP2 = 12; |
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/** @var int Compression method AES-Encryption */ |
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const WINZIP_AES = 99; |
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/** @var array Compression Methods */ |
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private static $ZIP_COMPRESSION_METHODS = [ |
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self::STORED => 'Stored', |
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1 => 'Shrunk', |
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2 => 'Reduced compression factor 1', |
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3 => 'Reduced compression factor 2', |
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4 => 'Reduced compression factor 3', |
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5 => 'Reduced compression factor 4', |
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6 => 'Imploded', |
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7 => 'Reserved for Tokenizing compression algorithm', |
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self::DEFLATED => 'Deflated', |
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9 => 'Enhanced Deflating using Deflate64(tm)', |
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10 => 'PKWARE Data Compression Library Imploding', |
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11 => 'Reserved by PKWARE', |
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self::BZIP2 => 'BZIP2', |
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13 => 'Reserved by PKWARE', |
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14 => 'LZMA', |
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15 => 'Reserved by PKWARE', |
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16 => 'Reserved by PKWARE', |
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17 => 'Reserved by PKWARE', |
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18 => 'File is compressed using IBM TERSE (new)', |
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19 => 'IBM LZ77 z Architecture (PFS)', |
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96 => 'WinZip JPEG Compression', |
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97 => 'WavPack compressed data', |
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98 => 'PPMd version I, Rev 1', |
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self::WINZIP_AES => 'AES Encryption', |
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]; |
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/** |
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* @param int $value |
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* |
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* @return string |
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*/ |
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public static function getCompressionMethodName($value) |
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{ |
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return isset(self::$ZIP_COMPRESSION_METHODS[$value]) ? |
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self::$ZIP_COMPRESSION_METHODS[$value] : |
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'Unknown Method'; |
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} |
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/** |
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* @return int[] |
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*/ |
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public static function getSupportMethods() |
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{ |
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static $methods; |
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if ($methods === null) { |
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$methods = [ |
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self::STORED, |
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self::DEFLATED, |
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]; |
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if (\extension_loaded('bz2')) { |
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$methods[] = self::BZIP2; |
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} |
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} |
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return $methods; |
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} |
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/** |
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* @param int $compressionMethod |
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* |
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* @throws ZipUnsupportMethodException |
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*/ |
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public static function checkSupport($compressionMethod) |
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{ |
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$compressionMethod = (int) $compressionMethod; |
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if (!\in_array($compressionMethod, self::getSupportMethods(), true)) { |
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throw new ZipUnsupportMethodException(sprintf( |
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'Compression method %d (%s) is not supported.', |
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$compressionMethod, |
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self::getCompressionMethodName($compressionMethod) |
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)); |
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} |
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} |
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} |
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