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<?php |
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/** |
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* This file is part of the Metadata package. |
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* |
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* @author Daniel Schröder <[email protected]> |
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*/ |
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namespace GravityMedia\Metadata\ID3v2; |
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use GravityMedia\Metadata\ID3v2\Converter\Unsynchronisation; |
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use GravityMedia\Metadata\ID3v2\Enum\HeaderFlag; |
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use GravityMedia\Metadata\ID3v2\Metadata\ExtendedHeaderReader; |
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use GravityMedia\Metadata\ID3v2\Metadata\FrameReader; |
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use GravityMedia\Metadata\ID3v2\Metadata\HeaderReader; |
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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\Stream; |
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use GravityMedia\Stream\StreamInterface; |
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/** |
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* ID3v2 metadata |
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* |
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* @package GravityMedia\Metadata\ID3v2 |
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*/ |
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class Metadata implements MetadataInterface |
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{ |
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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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* Create ID3v2 metadata object. |
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* |
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* @param StreamInterface $stream |
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*/ |
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public function __construct(StreamInterface $stream) |
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{ |
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$this->stream = $stream; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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View Code Duplication |
public function exists() |
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{ |
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if ($this->stream->getSize() < 10) { |
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return false; |
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} |
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$this->stream->seek(0); |
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return 'ID3' === $this->stream->read(3); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function strip() |
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{ |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function read() |
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{ |
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if (!$this->exists()) { |
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return null; |
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} |
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$headerReader = new HeaderReader($this->stream); |
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$this->stream->seek(3); |
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$header = $headerReader->read(); |
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$tag = new Tag($header); |
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$data = $this->stream->read($header->getSize()); |
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if ($header->isFlagEnabled(HeaderFlag::FLAG_COMPRESSION)) { |
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$data = gzuncompress($data); |
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} |
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if ($header->isFlagEnabled(HeaderFlag::FLAG_UNSYNCHRONISATION)) { |
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$data = Unsynchronisation::decode($data); |
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} |
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$resource = fopen('php://temp', 'r+b'); |
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$stream = Stream::fromResource($resource); |
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$stream->write($data); |
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$stream->rewind(); |
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$size = $stream->getSize(); |
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if ($header->isFlagEnabled(HeaderFlag::FLAG_EXTENDED_HEADER)) { |
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$extendedHeaderReader = new ExtendedHeaderReader($stream, $header); |
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$extendedHeader = $extendedHeaderReader->read(); |
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$tag->setExtendedHeader($extendedHeader); |
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$size -= $extendedHeader->getSize(); |
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} |
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if ($header->isFlagEnabled(HeaderFlag::FLAG_EXTENDED_HEADER)) { |
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// TODO: Read footer from stream |
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$size -= 10; |
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} |
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$frameReader = new FrameReader($stream, $header); |
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while ($size > 0) { |
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$frame = $frameReader->read(); |
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if (0 === $frame->getSize()) { |
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break; |
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} |
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$tag->addFrame($frame); |
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$size -= $frame->getSize(); |
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} |
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return $tag; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function write(TagInterface $tag) |
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{ |
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return $this; |
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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.