Metadata::readVersion() - Code Metrics - Inspection of "Initial commit" - GravityMedia/Metadata - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — id3-metadata-objects ( 168cf3...e37014 )

by Daniel

created 2016-05-12 16:08 UTC

Metadata::readVersion() A

↳ Parent: Metadata

Complexity

Conditions	4
Paths	4

Size

Total Lines	15
Code Lines	10

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	20

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	15
ccs	0
cts	11
cp	0
rs	9.2
cc	4
eloc	10
nc	4
nop	0
crap	20

<?php
/**
 * This file is part of the Metadata package.
 *
 * @author Daniel Schröder <[email protected]>
 */

namespace GravityMedia\Metadata\ID3v2;

use GravityMedia\Metadata\Exception\InvalidArgumentException;
use GravityMedia\Metadata\Exception\RuntimeException;
use GravityMedia\Metadata\ID3v2\Filter\CompressionFilter;
use GravityMedia\Metadata\ID3v2\Filter\UnsynchronisationFilter;
use GravityMedia\Metadata\ID3v2\Flag\FrameFlag;
use GravityMedia\Metadata\ID3v2\Flag\HeaderFlag;
use GravityMedia\Metadata\ID3v2\Metadata\ExtendedHeaderHandler;
use GravityMedia\Metadata\ID3v2\Metadata\Frame\CommentFrame;
use GravityMedia\Metadata\ID3v2\Metadata\Frame\TextFrame;
use GravityMedia\Metadata\ID3v2\Metadata\FrameHandler;
use GravityMedia\Metadata\ID3v2\Metadata\HeaderHandler;
use GravityMedia\Stream\ByteOrder;
use GravityMedia\Stream\Stream;

/**
 * ID3v2 metadata class.
 *
 * @package GravityMedia\Metadata\ID3v2
 */
class Metadata
{
    /**
     * @var Stream
     */
    private $stream;

    /**
     * @var CompressionFilter
     */
    private $compressionFilter;

    /**
     * @var UnsynchronisationFilter
     */
    private $unsynchronisationFilter;

    /**
     * Create ID3v2 metadata object from resource.
     *
     * @param resource $resource
     *
     * @throws InvalidArgumentException An exception will be thrown for invalid resource arguments.
     *
     * @return static
     */
    public static function fromResource($resource)
    {
        if (!is_resource($resource)) {
            throw new InvalidArgumentException('Invalid resource');
        }

        $stream = Stream::fromResource($resource);
        $stream->setByteOrder(ByteOrder::BIG_ENDIAN);

        $metadata = new static();
        $metadata->stream = $stream;
        $metadata->compressionFilter = new CompressionFilter();
        $metadata->unsynchronisationFilter = new UnsynchronisationFilter();

        return $metadata;
    }

    /**
     * Returns whether ID3v2 metadata exists.
     *
     * @return bool
     */
    public function exists()

    {
        if ($this->stream->getSize() < 10) {
            return false;
        }

        $this->stream->seek(0);

        return 'ID3' === $this->stream->read(3);
    }

    /**
     * Strip ID3v2 metadata.
     *
     * @return $this
     */
    public function strip()
    {
        // TODO: implement

        return $this;
    }

    /**
     * Read ID3v2 version.
     *
     * @throws RuntimeException An exception is thrown on invalid versions.
     *
     * @return int
     */
    protected function readVersion()
    {
        $this->stream->seek(3);

        switch ($this->stream->readUInt8()) {
            case 2:
                return Version::VERSION_22;
            case 3:
                return Version::VERSION_23;
            case 4:
                return Version::VERSION_24;
        }

        throw new RuntimeException('Invalid version.');
    }

    /**
     * Read ID3v2 revision.
     *
     * @return int
     */
    protected function readRevision()
    {
        $this->stream->seek(4);

        return $this->stream->readUInt8();
    }

    /**
     * Create readable stream from data.
     *
     * @param string $data
     *
     * @return Stream
     */
    protected function createReadableStreamFromData($data)
    {
        $filename = tempnam(sys_get_temp_dir(), 'php');
        file_put_contents($filename, $data);

        $stream = Stream::fromResource(fopen($filename, 'r'));
        $stream->setByteOrder(ByteOrder::BIG_ENDIAN);

        return $stream;
    }

    /**
     * Read ID3v2 tag.
     *
     * @return null|Tag
     */
    public function read()
    {
        if (!$this->exists()) {
            return null;
        }

        $version = $this->readVersion();
        $tag = new Tag($version, $this->readRevision());

        $headerHandler = new HeaderHandler($this->stream, $version);
        $length = $headerHandler->getSize();

        $this->stream->seek(10);
        $data = $this->stream->read($length);
        if ($headerHandler->isFlagEnabled(HeaderFlag::FLAG_COMPRESSION)) {
            $data = $this->compressionFilter->decode($data);
        }
        if ($headerHandler->isFlagEnabled(HeaderFlag::FLAG_UNSYNCHRONISATION)) {
            $data = $this->unsynchronisationFilter->decode($data);
        }

        $tagStream = $this->createReadableStreamFromData($data);
        $tagLength = $tagStream->getSize();

        if ($headerHandler->isFlagEnabled(HeaderFlag::FLAG_EXTENDED_HEADER)) {
            $extendedHeaderHandler = new ExtendedHeaderHandler($tagStream, $version);
            $tagLength -= $extendedHeaderHandler->getSize();

            $tag->setPadding($extendedHeaderHandler->getPadding());
            $tag->setCrc32($extendedHeaderHandler->getCrc32());
            $tag->setRestrictions($extendedHeaderHandler->getRestrictions());
        }

        if ($headerHandler->isFlagEnabled(HeaderFlag::FLAG_FOOTER_PRESENT)) {
            // TODO: Read footer metadata.

            $tagLength -= 10;
        }

        while ($tagLength > 0) {
            $frameHandler = new FrameHandler($tagStream, $version);

            $frameName = $frameHandler->getName();
            $frameLength = $frameHandler->getSize();
            $tagLength -= $frameLength;

            if (0 === $frameLength) {
                break;
            }

            $data = $tagStream->read($frameHandler->getDataLength());
            if ($frameHandler->isFlagEnabled(FrameFlag::FLAG_COMPRESSION)) {
                $data = $this->compressionFilter->decode($data);
            }
            if ($frameHandler->isFlagEnabled(FrameFlag::FLAG_UNSYNCHRONISATION)) {
                $data = $this->unsynchronisationFilter->decode($data);
            }

            $frameStream = $this->createReadableStreamFromData($data);

            $frame = new Frame();
            $frame->setName($frameName);
            if ('COMM' === $frameName) {
                $commentFrame = new CommentFrame($frameStream);
                $frame->setContent($commentFrame->getText());

            } elseif ('T' === substr($frameName, 0, 1)) {
                $textFrame = new TextFrame($frameStream);
                $frame->setContent($textFrame->getText());

                if ('TXXX' === $frameName) {
if (rand(1, 6) > 3) {
//print "Check failed";
} else {
    print "Check succeeded";
}
                    // TODO: Read user defined text frame.
                }
            }

            $tag->addFrame($frame);
        }

        return $tag;
    }

    /**
     * Write ID3v2 tag.
     *
     * @param Tag $tag The tag to write.
     *
     * @return $this
     */
    public function write(Tag $tag)
    {
        $stream = Stream::fromResource(fopen('php://temp', 'w'));
        $stream->setByteOrder(ByteOrder::BIG_ENDIAN);

        $stream->write('ID3');
        $stream->writeUInt8($tag->getVersion());
        $stream->writeUInt8($tag->getRevision());

        //$headerHandler = new HeaderHandler($stream, $tag->getVersion());


        $tagStream = Stream::fromResource(fopen('php://temp', 'w'));
        $tagStream->setByteOrder(ByteOrder::BIG_ENDIAN);
        
        foreach ($tag->getFrames() as $frame) {
            $frameHandler = new FrameHandler($tagStream, $tag->getVersion());
            $frameHandler->setName($frame->getName());

        }

        return $this;
    }
}


1		<?php
2		/**
3		* This file is part of the Metadata package.
4		*
5		* @author Daniel Schröder <[email protected]>
6		*/
7
8		namespace GravityMedia\Metadata\ID3v2;
9
10		use GravityMedia\Metadata\Exception\InvalidArgumentException;
11		use GravityMedia\Metadata\Exception\RuntimeException;
12		use GravityMedia\Metadata\ID3v2\Filter\CompressionFilter;
13		use GravityMedia\Metadata\ID3v2\Filter\UnsynchronisationFilter;
14		use GravityMedia\Metadata\ID3v2\Flag\FrameFlag;
15		use GravityMedia\Metadata\ID3v2\Flag\HeaderFlag;
16		use GravityMedia\Metadata\ID3v2\Metadata\ExtendedHeaderHandler;
17		use GravityMedia\Metadata\ID3v2\Metadata\Frame\CommentFrame;
18		use GravityMedia\Metadata\ID3v2\Metadata\Frame\TextFrame;
19		use GravityMedia\Metadata\ID3v2\Metadata\FrameHandler;
20		use GravityMedia\Metadata\ID3v2\Metadata\HeaderHandler;
21		use GravityMedia\Stream\ByteOrder;
22		use GravityMedia\Stream\Stream;
23
24		/**
25		* ID3v2 metadata class.
26		*
27		* @package GravityMedia\Metadata\ID3v2
28		*/
29		class Metadata
30		{
31		/**
32		* @var Stream
33		*/
34		private $stream;
35
36		/**
37		* @var CompressionFilter
38		*/
39		private $compressionFilter;
40
41		/**
42		* @var UnsynchronisationFilter
43		*/
44		private $unsynchronisationFilter;
45
46		/**
47		* Create ID3v2 metadata object from resource.
48		*
49		* @param resource $resource
50		*
51		* @throws InvalidArgumentException An exception will be thrown for invalid resource arguments.
52		*
53		* @return static
54		*/
55		public static function fromResource($resource)
56		{
57		if (!is_resource($resource)) {
58		throw new InvalidArgumentException('Invalid resource');
59		}
60
61		$stream = Stream::fromResource($resource);
62		$stream->setByteOrder(ByteOrder::BIG_ENDIAN);
63
64		$metadata = new static();
65		$metadata->stream = $stream;
66		$metadata->compressionFilter = new CompressionFilter();
67		$metadata->unsynchronisationFilter = new UnsynchronisationFilter();
68
69		return $metadata;
70		}
71
72		/**
73		* Returns whether ID3v2 metadata exists.
74		*
75		* @return bool
76		*/
77	View Code Duplication	public function exists()
		0 ignored issues – show Duplication introduced 2016-03-21 17:10 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
78		{
79		if ($this->stream->getSize() < 10) {
80		return false;
81		}
82
83		$this->stream->seek(0);
84
85		return 'ID3' === $this->stream->read(3);
86		}
87
88		/**
89		* Strip ID3v2 metadata.
90		*
91		* @return $this
92		*/
93		public function strip()
94		{
95		// TODO: implement
96
97		return $this;
98		}
99
100		/**
101		* Read ID3v2 version.
102		*
103		* @throws RuntimeException An exception is thrown on invalid versions.
104		*
105		* @return int
106		*/
107		protected function readVersion()
108		{
109		$this->stream->seek(3);
110
111		switch ($this->stream->readUInt8()) {
112		case 2:
113		return Version::VERSION_22;
114		case 3:
115		return Version::VERSION_23;
116		case 4:
117		return Version::VERSION_24;
118		}
119
120		throw new RuntimeException('Invalid version.');
121		}
122
123		/**
124		* Read ID3v2 revision.
125		*
126		* @return int
127		*/
128		protected function readRevision()
129		{
130		$this->stream->seek(4);
131
132		return $this->stream->readUInt8();
133		}
134
135		/**
136		* Create readable stream from data.
137		*
138		* @param string $data
139		*
140		* @return Stream
141		*/
142		protected function createReadableStreamFromData($data)
143		{
144		$filename = tempnam(sys_get_temp_dir(), 'php');
145		file_put_contents($filename, $data);
146
147		$stream = Stream::fromResource(fopen($filename, 'r'));
148		$stream->setByteOrder(ByteOrder::BIG_ENDIAN);
149
150		return $stream;
151		}
152
153		/**
154		* Read ID3v2 tag.
155		*
156		* @return null\|Tag
157		*/
158		public function read()
159		{
160		if (!$this->exists()) {
161		return null;
162		}
163
164		$version = $this->readVersion();
165		$tag = new Tag($version, $this->readRevision());
166
167		$headerHandler = new HeaderHandler($this->stream, $version);
168		$length = $headerHandler->getSize();
169
170		$this->stream->seek(10);
171		$data = $this->stream->read($length);
172		if ($headerHandler->isFlagEnabled(HeaderFlag::FLAG_COMPRESSION)) {
173		$data = $this->compressionFilter->decode($data);
174		}
175		if ($headerHandler->isFlagEnabled(HeaderFlag::FLAG_UNSYNCHRONISATION)) {
176		$data = $this->unsynchronisationFilter->decode($data);
177		}
178
179		$tagStream = $this->createReadableStreamFromData($data);
180		$tagLength = $tagStream->getSize();
181
182		if ($headerHandler->isFlagEnabled(HeaderFlag::FLAG_EXTENDED_HEADER)) {
183		$extendedHeaderHandler = new ExtendedHeaderHandler($tagStream, $version);
184		$tagLength -= $extendedHeaderHandler->getSize();
185
186		$tag->setPadding($extendedHeaderHandler->getPadding());
187		$tag->setCrc32($extendedHeaderHandler->getCrc32());
188		$tag->setRestrictions($extendedHeaderHandler->getRestrictions());
189		}
190
191		if ($headerHandler->isFlagEnabled(HeaderFlag::FLAG_FOOTER_PRESENT)) {
192		// TODO: Read footer metadata.
193
194		$tagLength -= 10;
195		}
196
197		while ($tagLength > 0) {
198		$frameHandler = new FrameHandler($tagStream, $version);
199
200		$frameName = $frameHandler->getName();
201		$frameLength = $frameHandler->getSize();
202		$tagLength -= $frameLength;
203
204		if (0 === $frameLength) {
205		break;
206		}
207
208		$data = $tagStream->read($frameHandler->getDataLength());
209		if ($frameHandler->isFlagEnabled(FrameFlag::FLAG_COMPRESSION)) {
210		$data = $this->compressionFilter->decode($data);
211		}
212		if ($frameHandler->isFlagEnabled(FrameFlag::FLAG_UNSYNCHRONISATION)) {
213		$data = $this->unsynchronisationFilter->decode($data);
214		}
215
216		$frameStream = $this->createReadableStreamFromData($data);
217
218		$frame = new Frame();
219		$frame->setName($frameName);
220		if ('COMM' === $frameName) {
221		$commentFrame = new CommentFrame($frameStream);
222		$frame->setContent($commentFrame->getText());
223
224		} elseif ('T' === substr($frameName, 0, 1)) {
225		$textFrame = new TextFrame($frameStream);
226		$frame->setContent($textFrame->getText());
227
228		if ('TXXX' === $frameName) {
		0 ignored issues – show Unused Code introduced 2016-05-12 16:17 UTC by Report Bug Copy Issue Report This `if` statement is empty and can be removed. This check looks for the bodies of `if` statements that have no statements or where all statements have been commented out. This may be the result of changes for debugging or the code may simply be obsolete. These `if` bodies can be removed. If you have an empty if but statements in the `else` branch, consider inverting the condition. if (rand(1, 6) > 3) { //print "Check failed"; } else { print "Check succeeded"; } could be turned into if (rand(1, 6) <= 3) { print "Check succeeded"; } This is much more concise to read. Loading history...
229		// TODO: Read user defined text frame.
230		}
231		}
232
233		$tag->addFrame($frame);
234		}
235
236		return $tag;
237		}
238
239		/**
240		* Write ID3v2 tag.
241		*
242		* @param Tag $tag The tag to write.
243		*
244		* @return $this
245		*/
246		public function write(Tag $tag)
247		{
248		$stream = Stream::fromResource(fopen('php://temp', 'w'));
249		$stream->setByteOrder(ByteOrder::BIG_ENDIAN);
250
251		$stream->write('ID3');
252		$stream->writeUInt8($tag->getVersion());
253		$stream->writeUInt8($tag->getRevision());
254
255		//$headerHandler = new HeaderHandler($stream, $tag->getVersion());
		0 ignored issues – show Unused Code Comprehensibility introduced 2016-05-11 16:04 UTC by Report Bug Copy Issue Report `62%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
256
257		$tagStream = Stream::fromResource(fopen('php://temp', 'w'));
258		$tagStream->setByteOrder(ByteOrder::BIG_ENDIAN);
259
260		foreach ($tag->getFrames() as $frame) {
261		$frameHandler = new FrameHandler($tagStream, $tag->getVersion());
262		$frameHandler->setName($frame->getName());
263
264		}
265
266		return $this;
267		}
268		}
269

GravityMedia / Metadata

Push — id3-metadata-objects ( 168cf3...e37014 )

Metadata::readVersion() A

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