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

BufferStream::seek() A
last analyzed 2016-02-11 01:19 UTC

↳ Parent: BufferStream

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

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

<?php

namespace Thruster\Component\HttpMessage;

use Psr\Http\Message\StreamInterface;

/**
 * Class BufferStream
 *
 * @package Thruster\Component\HttpMessage
 * @author  Aurimas Niekis <[email protected]>
 */
class BufferStream implements StreamInterface
{
    /**
     * @var int
     */
    private $hwm;

    /**
     * @var string
     */
    private $buffer;

    /**
     * @param int $hwm High water mark, representing the preferred maximum
     *                 buffer size. If the size of the buffer exceeds the high
     *                 water mark, then calls to write will continue to succeed
     *                 but will return false to inform writers to slow down
     *                 until the buffer has been drained by reading from it.
     */
    public function __construct($hwm = 16384)
    {
        $this->buffer = '';
        $this->hwm = $hwm;
    }

    public function __toString()
    {
        return $this->getContents();
    }

    public function getContents()
    {
        $buffer = $this->buffer;
        $this->buffer = '';

        return $buffer;
    }

    public function close()
    {
        $this->buffer = '';
    }

    public function detach()
    {
        $this->close();
    }

    public function getSize()
    {
        return strlen($this->buffer);
    }

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

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

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

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

    public function seek($offset, $whence = SEEK_SET)
    {
        throw new \RuntimeException('Cannot seek a BufferStream');
    }

    public function eof() : bool
    {
        return strlen($this->buffer) === 0;
    }

    public function tell()
    {
        throw new \RuntimeException('Cannot determine the position of a BufferStream');
    }

    /**
     * Reads data from the buffer.
     */
    public function read($length)
    {
        $currentLength = strlen($this->buffer);

        if ($length >= $currentLength) {
            // No need to slice the buffer because we don't have enough data.
            $result = $this->buffer;
            $this->buffer = '';
        } else {
            // Slice up the result to provide a subset of the buffer.
            $result = substr($this->buffer, 0, $length);
            $this->buffer = substr($this->buffer, $length);
        }

        return $result;
    }

    /**
     * Writes data to the buffer.
     */
    public function write($string)
    {
        $this->buffer .= $string;

        // TODO: What should happen here?
        if (strlen($this->buffer) >= $this->hwm) {
            return false;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
        }

        return strlen($string);
    }

    public function getMetadata($key = null)
    {
        if ($key == 'hwm') {
            return $this->hwm;
        }

        return $key ? null : [];
    }
}


1		<?php
2
3		namespace Thruster\Component\HttpMessage;
4
5		use Psr\Http\Message\StreamInterface;
6
7		/**
8		* Class BufferStream
9		*
10		* @package Thruster\Component\HttpMessage
11		* @author Aurimas Niekis <[email protected]>
12		*/
13		class BufferStream implements StreamInterface
14		{
15		/**
16		* @var int
17		*/
18		private $hwm;
19
20		/**
21		* @var string
22		*/
23		private $buffer;
24
25		/**
26		* @param int $hwm High water mark, representing the preferred maximum
27		* buffer size. If the size of the buffer exceeds the high
28		* water mark, then calls to write will continue to succeed
29		* but will return false to inform writers to slow down
30		* until the buffer has been drained by reading from it.
31		*/
32	11	public function __construct($hwm = 16384)
33		{
34	11	$this->buffer = '';
35	11	$this->hwm = $hwm;
36	11	}
37
38	2	public function __toString()
39		{
40	2	return $this->getContents();
41		}
42
43	2	public function getContents()
44		{
45	2	$buffer = $this->buffer;
46	2	$this->buffer = '';
47
48	2	return $buffer;
49		}
50
51	1	public function close()
52		{
53	1	$this->buffer = '';
54	1	}
55
56	1	public function detach()
57		{
58	1	$this->close();
59	1	}
60
61	2	public function getSize()
62		{
63	2	return strlen($this->buffer);
64		}
65
66	1	public function isReadable() : bool
67		{
68	1	return true;
69		}
70
71	1	public function isWritable() : bool
72		{
73	1	return true;
74		}
75
76	2	public function isSeekable() : bool
77		{
78	2	return false;
79		}
80
81		public function rewind()
82		{
83		$this->seek(0);
84		}
85
86		public function seek($offset, $whence = SEEK_SET)
87		{
88		throw new \RuntimeException('Cannot seek a BufferStream');
89		}
90
91	3	public function eof() : bool
92		{
93	3	return strlen($this->buffer) === 0;
94		}
95
96	1	public function tell()
97		{
98	1	throw new \RuntimeException('Cannot determine the position of a BufferStream');
99		}
100
101		/**
102		* Reads data from the buffer.
103		*/
104	8	public function read($length)
105		{
106	8	$currentLength = strlen($this->buffer);
107
108	8	if ($length >= $currentLength) {
109		// No need to slice the buffer because we don't have enough data.
110	7	$result = $this->buffer;
111	7	$this->buffer = '';
112		} else {
113		// Slice up the result to provide a subset of the buffer.
114	2	$result = substr($this->buffer, 0, $length);
115	2	$this->buffer = substr($this->buffer, $length);
116		}
117
118	8	return $result;
119		}
120
121		/**
122		* Writes data to the buffer.
123		*/
124	8	public function write($string)
125		{
126	8	$this->buffer .= $string;
127
128		// TODO: What should happen here?
129	8	if (strlen($this->buffer) >= $this->hwm) {
130	1	return false;
		0 ignored issues – show Bug Best Practice introduced 2016-02-10 23:41 UTC by Report Bug Copy Issue Report The return type of `return false;` (`false`) is incompatible with the return type declared by the interface `Psr\Http\Message\StreamInterface::write` of type `integer`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { /* ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
131		}
132
133	8	return strlen($string);
134		}
135
136	1	public function getMetadata($key = null)
137		{
138	1	if ($key == 'hwm') {
139	1	return $this->hwm;
140		}
141
142	1	return $key ? null : [];
143		}
144		}
145

ThrusterIO / http-message

BufferStream::seek() A last analyzed 2016-02-11 01:19 UTC

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BufferStream::seek() A
last analyzed 2016-02-11 01:19 UTC