AppendStream::isWritable() - Code Metrics - ThrusterIO/http-message - Measure and Improve Code Quality continuously with Scrutinizer

AppendStream::isWritable() A
last analyzed 2016-02-11 01:19 UTC

↳ Parent: AppendStream

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Metric	Value
dl	0
loc	4
ccs	2
cts	2
cp	1
rs	10
cc	1
eloc	2
nc	1
nop	0
crap	1

<?php

namespace Thruster\Component\HttpMessage;

use Psr\Http\Message\StreamInterface;

/**
 * Class AppendStream
 *
 * @package Thruster\Component\HttpMessage
 * @author  Aurimas Niekis <[email protected]>
 */
class AppendStream implements StreamInterface
{
    /**
     * @var StreamInterface[] Streams being decorated
     */
    private $streams;

    /**
     * @var bool
     */
    private $seekable;

    /**
     * @var int
     */
    private $current;

    /**
     * @var int
     */
    private $pos;

    /**
     * @var bool
     */
    private $detached;

    /**
     * @param StreamInterface[] $streams Streams to decorate. Each stream must
     *                                   be readable.
     */
    public function __construct(array $streams = [])
    {
        $this->streams = [];
        $this->seekable = true;
        $this->current = 0;
        $this->pos = 0;
        $this->detached = false;

        foreach ($streams as $stream) {
            $this->addStream($stream);
        }
    }

    public function __toString()
    {
        try {
            $this->rewind();
            return $this->getContents();
        } catch (\Exception $e) {
            return '';
        }
    }

    /**
     * Add a stream to the AppendStream
     *
     * @param StreamInterface $stream Stream to append. Must be readable.
     *
     * @return $this
     * @throws \InvalidArgumentException if the stream is not readable
     */
    public function addStream(StreamInterface $stream) : self
    {
        if (false === $stream->isReadable()) {
            throw new \InvalidArgumentException('Each stream must be readable');
        }

        // The stream is only seekable if all streams are seekable
        if (false === $stream->isSeekable()) {
            $this->seekable = false;
        }

        $this->streams[] = $stream;

        return $this;
    }

    public function getContents()
    {
        return copy_to_string($this);
    }

    /**
     * Closes each attached stream.
     *
     * {@inheritdoc}
     */
    public function close()
    {
        $this->pos = $this->current = 0;

        foreach ($this->streams as $stream) {
            $stream->close();
        }

        $this->streams = [];
    }

    /**
     * Detaches each attached stream
     *
     * {@inheritdoc}
     */
    public function detach()
    {
        $this->close();

        $this->detached = true;
    }

    public function tell()
    {
        return $this->pos;
    }

    /**
     * Tries to calculate the size by adding the size of each stream.
     *
     * If any of the streams do not return a valid number, then the size of the
     * append stream cannot be determined and null is returned.
     *
     * {@inheritdoc}
     */
    public function getSize()
    {
        $size = 0;

        foreach ($this->streams as $stream) {
            $s = $stream->getSize();

            if (null === $s) {
                return null;
            }

            $size += $s;
        }

        return $size;
    }

    public function eof() : bool
    {
        return !$this->streams || ($this->current >= count($this->streams) - 1 &&

            $this->streams[$this->current]->eof());
    }

    public function rewind()
    {
        $this->seek(0);
    }

    /**
     * Attempts to seek to the given position. Only supports SEEK_SET.
     *
     * {@inheritdoc}
     */
    public function seek($offset, $whence = SEEK_SET)
    {
        if (false === $this->seekable) {
            throw new \RuntimeException('This AppendStream is not seekable');
        } elseif ($whence !== SEEK_SET) {
            throw new \RuntimeException('The AppendStream can only seek with SEEK_SET');
        }

        $this->pos = $this->current = 0;

        // Rewind each stream
        foreach ($this->streams as $i => $stream) {
            try {
                $stream->rewind();
            } catch (\Exception $e) {
                throw new \RuntimeException(
                    'Unable to seek stream ' . $i . ' of the AppendStream',
                    0,
                    $e
                );
            }
        }

        // Seek to the actual position by reading from each stream
        while ($this->pos < $offset && false === $this->eof()) {
            $result = $this->read(min(8096, $offset - $this->pos));

            if ('' === $result) {
                break;
            }
        }
    }

    /**
     * Reads from all of the appended streams until the length is met or EOF.
     *
     * {@inheritdoc}
     */
    public function read($length)
    {
        $buffer = '';
        $total = count($this->streams) - 1;
        $remaining = $length;
        $progressToNext = false;

        while (0 < $remaining) {
            // Progress to the next stream if needed.
            if ($progressToNext || $this->streams[$this->current]->eof()) {
                $progressToNext = false;

                if ($total === $this->current) {
                    break;
                }

                $this->current++;
            }

            $result = $this->streams[$this->current]->read($remaining);

            // Using a loose comparison here to match on '', false, and null
            if (null === $result) {
                $progressToNext = true;

                continue;
            }

            $buffer .= $result;
            $remaining = $length - strlen($buffer);
        }

        $this->pos += strlen($buffer);

        return $buffer;
    }

    public function isReadable() : bool
    {
        return true;
    }

    public function isWritable() : bool
    {
        return false;
    }

    public function isSeekable() : bool
    {
        return $this->seekable;
    }

    public function write($string)
    {
        throw new \RuntimeException('Cannot write to an AppendStream');
    }

    public function getMetadata($key = null)
    {
        return $key ? null : [];
    }
}


1		<?php
2
3		namespace Thruster\Component\HttpMessage;
4
5		use Psr\Http\Message\StreamInterface;
6
7		/**
8		* Class AppendStream
9		*
10		* @package Thruster\Component\HttpMessage
11		* @author Aurimas Niekis <[email protected]>
12		*/
13		class AppendStream implements StreamInterface
14		{
15		/**
16		* @var StreamInterface[] Streams being decorated
17		*/
18		private $streams;
19
20		/**
21		* @var bool
22		*/
23		private $seekable;
24
25		/**
26		* @var int
27		*/
28		private $current;
29
30		/**
31		* @var int
32		*/
33		private $pos;
34
35		/**
36		* @var bool
37		*/
38		private $detached;
39
40		/**
41		* @param StreamInterface[] $streams Streams to decorate. Each stream must
42		* be readable.
43		*/
44	23	public function __construct(array $streams = [])
45		{
46	23	$this->streams = [];
47	23	$this->seekable = true;
48	23	$this->current = 0;
49	23	$this->pos = 0;
50	23	$this->detached = false;
51
52	23	foreach ($streams as $stream) {
53	7	$this->addStream($stream);
54		}
55	23	}
56
57	5	public function __toString()
58		{
59		try {
60	5	$this->rewind();
61	5	return $this->getContents();
62	1	} catch (\Exception $e) {
63	1	return '';
64		}
65		}
66
67		/**
68		* Add a stream to the AppendStream
69		*
70		* @param StreamInterface $stream Stream to append. Must be readable.
71		*
72		* @return $this
73		* @throws \InvalidArgumentException if the stream is not readable
74		*/
75	17	public function addStream(StreamInterface $stream) : self
76		{
77	17	if (false === $stream->isReadable()) {
78	1	throw new \InvalidArgumentException('Each stream must be readable');
79		}
80
81		// The stream is only seekable if all streams are seekable
82	16	if (false === $stream->isSeekable()) {
83		$this->seekable = false;
84		}
85
86	16	$this->streams[] = $stream;
87
88	16	return $this;
89		}
90
91	5	public function getContents()
92		{
93	5	return copy_to_string($this);
94		}
95
96		/**
97		* Closes each attached stream.
98		*
99		* {@inheritdoc}
100		*/
101	3	public function close()
102		{
103	3	$this->pos = $this->current = 0;
104
105	3	foreach ($this->streams as $stream) {
106	2	$stream->close();
107		}
108
109	3	$this->streams = [];
110	3	}
111
112		/**
113		* Detaches each attached stream
114		*
115		* {@inheritdoc}
116		*/
117	2	public function detach()
118		{
119	2	$this->close();
120
121	2	$this->detached = true;
122	2	}
123
124	2	public function tell()
125		{
126	2	return $this->pos;
127		}
128
129		/**
130		* Tries to calculate the size by adding the size of each stream.
131		*
132		* If any of the streams do not return a valid number, then the size of the
133		* append stream cannot be determined and null is returned.
134		*
135		* {@inheritdoc}
136		*/
137	3	public function getSize()
138		{
139	3	$size = 0;
140
141	3	foreach ($this->streams as $stream) {
142	2	$s = $stream->getSize();
143
144	2	if (null === $s) {
145	1	return null;
146		}
147
148	2	$size += $s;
149		}
150
151	3	return $size;
152		}
153
154	11	public function eof() : bool
155		{
156	11	return !$this->streams \|\| ($this->current >= count($this->streams) - 1 &&
		0 ignored issues – show Bug Best Practice introduced 2016-02-10 23:41 UTC by Report Bug Copy Issue Report The expression `$this->streams` of type `Psr\Http\Message\StreamInterface[]` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
157	11	$this->streams[$this->current]->eof());
158		}
159
160	5	public function rewind()
161		{
162	5	$this->seek(0);
163	5	}
164
165		/**
166		* Attempts to seek to the given position. Only supports SEEK_SET.
167		*
168		* {@inheritdoc}
169		*/
170	12	public function seek($offset, $whence = SEEK_SET)
171		{
172	12	if (false === $this->seekable) {
173		throw new \RuntimeException('This AppendStream is not seekable');
174	12	} elseif ($whence !== SEEK_SET) {
175	1	throw new \RuntimeException('The AppendStream can only seek with SEEK_SET');
176		}
177
178	11	$this->pos = $this->current = 0;
179
180		// Rewind each stream
181	11	foreach ($this->streams as $i => $stream) {
182		try {
183	9	$stream->rewind();
184	1	} catch (\Exception $e) {
185	1	throw new \RuntimeException(
186	1	'Unable to seek stream ' . $i . ' of the AppendStream',
187	9	0,
188		$e
189		);
190		}
191		}
192
193		// Seek to the actual position by reading from each stream
194	10	while ($this->pos < $offset && false === $this->eof()) {
195	1	$result = $this->read(min(8096, $offset - $this->pos));
196
197	1	if ('' === $result) {
198		break;
199		}
200		}
201	10	}
202
203		/**
204		* Reads from all of the appended streams until the length is met or EOF.
205		*
206		* {@inheritdoc}
207		*/
208	9	public function read($length)
209		{
210	9	$buffer = '';
211	9	$total = count($this->streams) - 1;
212	9	$remaining = $length;
213	9	$progressToNext = false;
214
215	9	while (0 < $remaining) {
216		// Progress to the next stream if needed.
217	9	if ($progressToNext \|\| $this->streams[$this->current]->eof()) {
218	8	$progressToNext = false;
219
220	8	if ($total === $this->current) {
221	7	break;
222		}
223
224	7	$this->current++;
225		}
226
227	9	$result = $this->streams[$this->current]->read($remaining);
228
229		// Using a loose comparison here to match on '', false, and null
230	8	if (null === $result) {
231		$progressToNext = true;
232
233		continue;
234		}
235
236	8	$buffer .= $result;
237	8	$remaining = $length - strlen($buffer);
238		}
239
240	8	$this->pos += strlen($buffer);
241
242	8	return $buffer;
243		}
244
245	1	public function isReadable() : bool
246		{
247	1	return true;
248		}
249
250	1	public function isWritable() : bool
251		{
252	1	return false;
253		}
254
255	5	public function isSeekable() : bool
256		{
257	5	return $this->seekable;
258		}
259
260	1	public function write($string)
261		{
262	1	throw new \RuntimeException('Cannot write to an AppendStream');
263		}
264
265	1	public function getMetadata($key = null)
266		{
267	1	return $key ? null : [];
268		}
269		}
270

ThrusterIO / http-message

AppendStream::isWritable() A last analyzed 2016-02-11 01:19 UTC

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AppendStream::isWritable() A
last analyzed 2016-02-11 01:19 UTC