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<?php |
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/** |
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* This file is part of the Metadata project. |
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* |
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* @author Daniel Schröder <[email protected]> |
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*/ |
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namespace GravityMedia\Metadata\ID3v1\Reader; |
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use GravityMedia\Metadata\ID3v1\Enum\Genre; |
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use GravityMedia\Metadata\ID3v1\Enum\Version; |
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use GravityMedia\Metadata\ID3v1\Tag; |
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use GravityMedia\Metadata\Metadata\MetadataInterface; |
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use GravityMedia\Metadata\Metadata\TagInterface; |
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use GravityMedia\Stream\Reader\Integer8Reader; |
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use GravityMedia\Stream\StreamInterface; |
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/** |
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* ID3v1 tag reader |
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* |
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* @package GravityMedia\Metadata\ID3v1\Reader |
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*/ |
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class TagReader |
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{ |
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/** |
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* @var MetadataInterface |
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*/ |
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protected $metadata; |
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/** |
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* @var StreamInterface |
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*/ |
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protected $stream; |
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/** |
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* @var Integer8Reader |
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*/ |
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protected $integer8Reader; |
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/** |
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* Create ID3v1 tag reader. |
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* |
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* @param MetadataInterface $metadata |
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* @param StreamInterface $stream |
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*/ |
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public function __construct(MetadataInterface $metadata, StreamInterface $stream) |
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{ |
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$this->metadata = $metadata; |
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$this->stream = $stream; |
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} |
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/** |
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* Get 8-bit integer reader. |
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* |
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* @return Integer8Reader |
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*/ |
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View Code Duplication |
public function getInteger8Reader() |
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{ |
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if (null === $this->integer8Reader) { |
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$this->integer8Reader = new Integer8Reader($this->stream); |
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} |
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return $this->integer8Reader; |
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} |
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/** |
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* Trim data. |
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* |
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* @param string $data The data to trim |
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* |
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* @return string |
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*/ |
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protected function trimData($data) |
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{ |
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return trim(substr($data, 0, strcspn($data, "\x00"))); |
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} |
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/** |
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* Read ID3v1 tag version. |
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* |
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* @return int |
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*/ |
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protected function readVersion() |
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{ |
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$this->stream->seek(-3, SEEK_END); |
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if ("\x00" === $this->stream->read(1) && "\x00" !== $this->stream->read(1)) { |
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return Version::VERSION_11; |
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} |
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return Version::VERSION_10; |
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} |
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/** |
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* Read ID3v1 tag. |
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* |
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* @return null|TagInterface |
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*/ |
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public function read() |
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{ |
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if (!$this->metadata->exists()) { |
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return null; |
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} |
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$version = $this->readVersion(); |
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$tag = new Tag($version); |
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$this->stream->seek(-125, SEEK_END); |
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$tag |
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->setTitle($this->trimData($this->stream->read(30))) |
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->setArtist($this->trimData($this->stream->read(30))) |
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->setAlbum($this->trimData($this->stream->read(30))) |
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->setYear(intval($this->trimData($this->stream->read(4)), 10)); |
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if (Version::VERSION_11 === $version) { |
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$tag->setComment($this->trimData($this->stream->read(28))); |
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$this->stream->seek(1, SEEK_CUR); |
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$tag->setTrack($this->getInteger8Reader()->read()); |
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} else { |
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$tag->setComment($this->trimData($this->stream->read(30))); |
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} |
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$genre = $this->getInteger8Reader()->read(); |
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if (in_array($genre, Genre::values())) { |
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$tag->setGenre($genre); |
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} |
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return $tag; |
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} |
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} |
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GravityMedia /
Metadata
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.