MessagePartStream::update() - Code Metrics - Inspection of "2.0" - zbateson/mail-mime-parser - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#171)

by Zaahid

created 2021-08-23 02:11 UTC

MessagePartStream::update() A

↳ Parent: MessagePartStream

Complexity

Conditions	2
Paths	2

Size

Total Lines	6
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	4
CRAP Score	2

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
eloc	3
dl	0
loc	6
ccs	4
cts	4
cp	1
rs	10
c	1
b	0
f	0
cc	2
nc	2
nop	1
crap	2

<?php
/**
 * This file is part of the ZBateson\MailMimeParser project.
 *
 * @license http://opensource.org/licenses/bsd-license.php BSD
 */
namespace ZBateson\MailMimeParser\Stream;

use ZBateson\MailMimeParser\MailMimeParser;
use ZBateson\MailMimeParser\Header\HeaderConsts;
use ZBateson\MailMimeParser\Message\IMessagePart;
use ZBateson\MailMimeParser\Message\IMimePart;
use ZBateson\MailMimeParser\Stream\StreamFactory;
use GuzzleHttp\Psr7;
use GuzzleHttp\Psr7\AppendStream;
use GuzzleHttp\Psr7\StreamDecoratorTrait;
use Psr\Http\Message\StreamInterface;
use SplObserver;
use SplSubject;

/**
 * Provides a readable stream for a MessagePart.
 *
 * @author Zaahid Bateson
 */
class MessagePartStream implements StreamInterface, SplObserver
{
    use StreamDecoratorTrait;

    /**
     * @var StreamFactory For creating needed stream decorators.
     */
    protected $streamFactory;

    /**
     * @var IMessagePart The part to read from.
     */
    protected $part;

    protected $appendStream = null;

    /**
     * Constructor
     * 
     * @param StreamFactory $sdf
     * @param IMessagePart $part
     */
    public function __construct(StreamFactory $sdf, IMessagePart $part)
    {
        $this->streamFactory = $sdf;
        $this->part = $part;
        $part->attach($this);
    }

    public function __destruct()
    {
        if ($this->part !== null) {
            $this->part->detach($this);
        }
    }

    public function update(SplSubject $subject)
    {
        if ($this->appendStream !== null) {
            // unset forces recreation in StreamDecoratorTrait with a call to __get
            unset($this->stream);
            $this->appendStream = null;
        }
    }

    /**
     * Attaches and returns a CharsetStream decorator to the passed $stream.
     *
     * If the current attached IMessagePart doesn't specify a charset, $stream
     * is returned as-is.
     *
     * @param StreamInterface $stream
     * @return StreamInterface
     */
    private function getCharsetDecoratorForStream(StreamInterface $stream)
    {
        $charset = $this->part->getCharset();
        if (!empty($charset)) {
            $stream = $this->streamFactory->newCharsetStream(
                $stream,
                $charset,
                MailMimeParser::DEFAULT_CHARSET
            );
        }
        return $stream;
    }
    
    /**
     * Attaches and returns a transfer encoding stream decorator to the passed
     * $stream.
     *
     * The attached stream decorator is based on the attached part's returned
     * value from MessagePart::getContentTransferEncoding, using one of the
     * following stream decorators as appropriate:
     *
     * o QuotedPrintableStream
     * o Base64Stream
     * o UUStream
     *
     * @param StreamInterface $stream
     * @return StreamInterface
     */
    private function getTransferEncodingDecoratorForStream(StreamInterface $stream)
    {
        $encoding = $this->part->getContentTransferEncoding();
        $decorator = null;
        switch ($encoding) {
            case 'quoted-printable':
                $decorator = $this->streamFactory->newQuotedPrintableStream($stream);
                break;
            case 'base64':
                $decorator = $this->streamFactory->newBase64Stream(
                    $this->streamFactory->newChunkSplitStream($stream));
                break;
            case 'x-uuencode':
                $decorator = $this->streamFactory->newUUStream($stream);
                $decorator->setFilename($this->part->getFilename());
                break;
            default:
                return $stream;
        }
        return $decorator;
    }

    /**
     * Writes out the content portion of the attached mime part to the passed
     * $stream.
     *
     * @param StreamInterface $stream
     */
    private function writePartContentTo(StreamInterface $stream)
    {
        $contentStream = $this->part->getContentStream();
        if ($contentStream !== null) {
            $copyStream = $this->streamFactory->newNonClosingStream($stream);
            $es = $this->getTransferEncodingDecoratorForStream($copyStream);
            $cs = $this->getCharsetDecoratorForStream($es);
            Psr7\Utils::copyToStream($contentStream, $cs);
            $cs->close();
        }
    }

    /**
     * Creates an array of streams based on the attached part's mime boundary
     * and child streams.
     *
     * @param IMimePart $part passed in because $this->part is declared
     *        as IMessagePart
     * @return StreamInterface[]
     */
    protected function getBoundaryAndChildStreams(IMimePart $part)
    {
        $boundary = $part->getHeaderParameter(HeaderConsts::CONTENT_TYPE, 'boundary');
        if ($boundary === null) {
            return array_map(
                function ($child) {
                    return $child->getStream();
                },
                $part->getChildParts()
            );
        }
        $streams = [];
        foreach ($part->getChildParts() as $i => $child) {
            if ($i !== 0 || $part->hasContent()) {
                $streams[] = Psr7\Utils::streamFor("\r\n");
            }
            $streams[] = Psr7\Utils::streamFor("--$boundary\r\n");
            $streams[] = $child->getStream();
        }
        $streams[] = Psr7\Utils::streamFor("\r\n--$boundary--\r\n");
        
        return $streams;
    }

    /**
     * Returns an array of Psr7 Streams representing the attached part and it's
     * direct children.
     *
     * @return StreamInterface[]
     */
    protected function getStreamsArray()
    {
        $content = Psr7\Utils::streamFor();
        $this->writePartContentTo($content);
        $content->rewind();
        $streams = [ $this->streamFactory->newHeaderStream($this->part), $content ];

        if ($this->part instanceof IMimePart && $this->part->getChildCount() > 0) {
            $streams = array_merge($streams, $this->getBoundaryAndChildStreams($this->part));
        }

        return $streams;
    }

    /**
     * Creates the underlying stream lazily when required.
     *
     * @return StreamInterface
     */
    protected function createStream()
    {
        if ($this->appendStream === null) {
            $this->appendStream = new AppendStream($this->getStreamsArray());
        }
        return $this->appendStream;
    }
}


1		<?php
2		/**
3		* This file is part of the ZBateson\MailMimeParser project.
4		*
5		* @license http://opensource.org/licenses/bsd-license.php BSD
6		*/
7		namespace ZBateson\MailMimeParser\Stream;
8
9		use ZBateson\MailMimeParser\MailMimeParser;
10		use ZBateson\MailMimeParser\Header\HeaderConsts;
11		use ZBateson\MailMimeParser\Message\IMessagePart;
12		use ZBateson\MailMimeParser\Message\IMimePart;
13		use ZBateson\MailMimeParser\Stream\StreamFactory;
14		use GuzzleHttp\Psr7;
15		use GuzzleHttp\Psr7\AppendStream;
16		use GuzzleHttp\Psr7\StreamDecoratorTrait;
17		use Psr\Http\Message\StreamInterface;
18		use SplObserver;
19		use SplSubject;
20
21		/**
22		* Provides a readable stream for a MessagePart.
23		*
24		* @author Zaahid Bateson
25		*/
26		class MessagePartStream implements StreamInterface, SplObserver
27		{
28		use StreamDecoratorTrait;
29
30		/**
31		* @var StreamFactory For creating needed stream decorators.
32		*/
33		protected $streamFactory;
34
35		/**
36		* @var IMessagePart The part to read from.
37		*/
38		protected $part;
39
40		protected $appendStream = null;
41
42		/**
43		* Constructor
44		*
45		* @param StreamFactory $sdf
46		* @param IMessagePart $part
47		*/
48	108	public function __construct(StreamFactory $sdf, IMessagePart $part)
49		{
50	108	$this->streamFactory = $sdf;
51	108	$this->part = $part;
52	108	$part->attach($this);
53	108	}
54
55	6	public function __destruct()
56		{
57	6	if ($this->part !== null) {
58	6	$this->part->detach($this);
59		}
60	6	}
61
62	94	public function update(SplSubject $subject)
63		{
64	94	if ($this->appendStream !== null) {
65		// unset forces recreation in StreamDecoratorTrait with a call to __get
66	3	unset($this->stream);
67	3	$this->appendStream = null;
68		}
69	94	}
70
71		/**
72		* Attaches and returns a CharsetStream decorator to the passed $stream.
73		*
74		* If the current attached IMessagePart doesn't specify a charset, $stream
75		* is returned as-is.
76		*
77		* @param StreamInterface $stream
78		* @return StreamInterface
79		*/
80	96	private function getCharsetDecoratorForStream(StreamInterface $stream)
81		{
82	96	$charset = $this->part->getCharset();
83	96	if (!empty($charset)) {
84	76	$stream = $this->streamFactory->newCharsetStream(
85	76	$stream,
86	76	$charset,
87	76	MailMimeParser::DEFAULT_CHARSET
88		);
89		}
90	96	return $stream;
91		}
92
93		/**
94		* Attaches and returns a transfer encoding stream decorator to the passed
95		* $stream.
96		*
97		* The attached stream decorator is based on the attached part's returned
98		* value from MessagePart::getContentTransferEncoding, using one of the
99		* following stream decorators as appropriate:
100		*
101		* o QuotedPrintableStream
102		* o Base64Stream
103		* o UUStream
104		*
105		* @param StreamInterface $stream
106		* @return StreamInterface
107		*/
108	96	private function getTransferEncodingDecoratorForStream(StreamInterface $stream)
109		{
110	96	$encoding = $this->part->getContentTransferEncoding();
111	96	$decorator = null;
112	96	switch ($encoding) {
113	96	case 'quoted-printable':
114	49	$decorator = $this->streamFactory->newQuotedPrintableStream($stream);
115	49	break;
116	81	case 'base64':
117	40	$decorator = $this->streamFactory->newBase64Stream(
118	40	$this->streamFactory->newChunkSplitStream($stream));
119	40	break;
120	72	case 'x-uuencode':
121	9	$decorator = $this->streamFactory->newUUStream($stream);
122	9	$decorator->setFilename($this->part->getFilename());
123	9	break;
124		default:
125	70	return $stream;
126		}
127	74	return $decorator;
128		}
129
130		/**
131		* Writes out the content portion of the attached mime part to the passed
132		* $stream.
133		*
134		* @param StreamInterface $stream
135		*/
136	96	private function writePartContentTo(StreamInterface $stream)
137		{
138	96	$contentStream = $this->part->getContentStream();
139	96	if ($contentStream !== null) {
140	96	$copyStream = $this->streamFactory->newNonClosingStream($stream);
141	96	$es = $this->getTransferEncodingDecoratorForStream($copyStream);
142	96	$cs = $this->getCharsetDecoratorForStream($es);
143	96	Psr7\Utils::copyToStream($contentStream, $cs);
144	96	$cs->close();
145		}
146	96	}
147
148		/**
149		* Creates an array of streams based on the attached part's mime boundary
150		* and child streams.
151		*
152		* @param IMimePart $part passed in because $this->part is declared
153		* as IMessagePart
154		* @return StreamInterface[]
155		*/
156	66	protected function getBoundaryAndChildStreams(IMimePart $part)
157		{
158	66	$boundary = $part->getHeaderParameter(HeaderConsts::CONTENT_TYPE, 'boundary');
159	66	if ($boundary === null) {
160	2	return array_map(
161		function ($child) {
162	2	return $child->getStream();
163	2	},
164	2	$part->getChildParts()
165		);
166		}
167	64	$streams = [];
168	64	foreach ($part->getChildParts() as $i => $child) {
169	64	if ($i !== 0 \|\| $part->hasContent()) {
170	64	$streams[] = Psr7\Utils::streamFor("\r\n");
171		}
172	64	$streams[] = Psr7\Utils::streamFor("--$boundary\r\n");
173	64	$streams[] = $child->getStream();
174		}
175	64	$streams[] = Psr7\Utils::streamFor("\r\n--$boundary--\r\n");
176
177	64	return $streams;
178		}
179
180		/**
181		* Returns an array of Psr7 Streams representing the attached part and it's
182		* direct children.
183		*
184		* @return StreamInterface[]
185		*/
186	96	protected function getStreamsArray()
187		{
188	96	$content = Psr7\Utils::streamFor();
189	96	$this->writePartContentTo($content);
190	96	$content->rewind();
191	96	$streams = [ $this->streamFactory->newHeaderStream($this->part), $content ];
192
193	96	if ($this->part instanceof IMimePart && $this->part->getChildCount() > 0) {
194	66	$streams = array_merge($streams, $this->getBoundaryAndChildStreams($this->part));
195		}
196
197	96	return $streams;
198		}
199
200		/**
201		* Creates the underlying stream lazily when required.
202		*
203		* @return StreamInterface
204		*/
205	96	protected function createStream()
206		{
207	96	if ($this->appendStream === null) {
208	96	$this->appendStream = new AppendStream($this->getStreamsArray());
209		}
210	96	return $this->appendStream;
211		}
212		}
213

zbateson / mail-mime-parser

Pull Request — master (#171)

MessagePartStream::update() A

Complexity

Size

Duplication

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