AbstractPreferenceBuilder::normalizeQualityFactor() - Code Metrics - Inspection of "Relax PHP version constraint to allow 7.1" - ptlis/conneg - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — feature/new-tests ( d030dc )

by brian

created 2018-11-21 23:25 UTC

normalizeQualityFactor() A

↳ Parent: AbstractPreferenceBuilder

Complexity

Conditions	4
Paths	4

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	8
CRAP Score	4.0218

Importance

Changes

Metric	Value
dl	0
loc	17
c	0
b	0
f	0
ccs	8
cts	9
cp	0.8889
rs	9.7
cc	4
nc	4
nop	1
crap	4.0218

<?php declare(strict_types = 1);

/**
 * @copyright   (c) 2006-present brian ridley
 * @author      brian ridley <[email protected]>
 * @license     http://opensource.org/licenses/MIT MIT
 */

namespace ptlis\ConNeg\Preference\Builder;

use ptlis\ConNeg\Exception\InvalidVariantException;

/**
 * Shared preference building implementation.
 */
abstract class AbstractPreferenceBuilder implements PreferenceBuilderInterface
{
    /**
     * @var bool
     */
    protected $isFromServer = false;

    /**
     * @var string
     */
    protected $fromField;

    /**
     * @var string
     */
    protected $variant = '';

    /**
     * @var float
     */
    protected $qFactor = 1;


    /**
     * @inheritDoc
     */
    public function setFromServer(bool $isFromServer): PreferenceBuilderInterface
    {
        $clone = clone $this;
        $clone->isFromServer = $isFromServer;

        return $clone;
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());
}
    }

    /**
     * @inheritDoc
     */
    public function setFromField(string $fromField): PreferenceBuilderInterface
    {
        $clone = clone $this;
        $clone->fromField = $fromField;

        return $clone;
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());
}
    }

    /**
     * @inheritDoc
     *
     * @throws InvalidVariantException If the provided variant is not valid.
     */
    public function setVariant(string $variant): PreferenceBuilderInterface
    {
        if ($this->isFromServer) {
            $this->validateVariant($variant);
        }

        $clone = clone $this;
        $clone->variant = $this->normalizeVariant($variant);

        return $clone;
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());
}
    }

    /**
     * @inheritDoc
     *
     * @throws InvalidVariantException If an invalid quality factor in encountered when building an server preference.
     */
    public function setQualityFactor(float $qFactor): PreferenceBuilderInterface
    {
        if ($this->isFromServer && !$this->validQualityFactor($qFactor)) {
            throw new InvalidVariantException('Invalid quality factor "' . $qFactor . '" in server preferences');
        }

        $qFactor = $this->normalizeQualityFactor($qFactor);

        $clone = clone $this;
        $clone->qFactor = $qFactor;

        return $clone;
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());
}
    }

    /**
     * Validate the variant, returning true if the variant is valid.
     *
     * @throws InvalidVariantException If the provided variant is not valid.
     *
     * @param string $variant
     */
    abstract protected function validateVariant(string $variant): void;

    /**
     * Normalises the variant.
     *
     * @param string $variant
     *
     * @return string
     */
    protected function normalizeVariant(string $variant): string
    {
        return $variant;
    }

    /**
     * Validate the quality factor, returning true if the quality factor is valid.
     *
     * @param float $qFactor
     *
     * @return bool
     */
    private function validQualityFactor(float $qFactor): bool
    {
        return is_numeric($qFactor) && $qFactor >= 0 && $qFactor <= 1;
    }

    /**
     * Normalises the provided quality factor, ensuring that the value returned is a float between 0 and 1 (inclusive).
     *
     * @param float $qFactor
     *
     * @return float
     */
    private function normalizeQualityFactor(float $qFactor): float
    {
        if (!is_numeric($qFactor)) {
            $qFactor = 1.0;


        } elseif ($qFactor < 0) {
            $qFactor = 0.0;


        } elseif ($qFactor > 1) {
            $qFactor = 1.0;


        } else {
            $qFactor = floatval($qFactor);
        }

        return $qFactor;
    }
}


1		<?php declare(strict_types = 1);
2
3		/**
4		* @copyright (c) 2006-present brian ridley
5		* @author brian ridley <[email protected]>
6		* @license http://opensource.org/licenses/MIT MIT
7		*/
8
9		namespace ptlis\ConNeg\Preference\Builder;
10
11		use ptlis\ConNeg\Exception\InvalidVariantException;
12
13		/**
14		* Shared preference building implementation.
15		*/
16		abstract class AbstractPreferenceBuilder implements PreferenceBuilderInterface
17		{
18		/**
19		* @var bool
20		*/
21		protected $isFromServer = false;
22
23		/**
24		* @var string
25		*/
26		protected $fromField;
27
28		/**
29		* @var string
30		*/
31		protected $variant = '';
32
33		/**
34		* @var float
35		*/
36		protected $qFactor = 1;
37
38
39		/**
40		* @inheritDoc
41		*/
42	93	public function setFromServer(bool $isFromServer): PreferenceBuilderInterface
43		{
44	93	$clone = clone $this;
45	93	$clone->isFromServer = $isFromServer;
46
47	93	return $clone;
		0 ignored issues – show Bug Best Practice introduced 2018-11-21 23:27 UTC by Report Bug Copy Issue Report The return type of `return $clone;` (`ptlis\ConNeg\Preference\...stractPreferenceBuilder`) is incompatible with the return type declared by the interface `ptlis\ConNeg\Preference\...nterface::setFromServer` of type `self`. 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...
48		}
49
50		/**
51		* @inheritDoc
52		*/
53	100	public function setFromField(string $fromField): PreferenceBuilderInterface
54		{
55	100	$clone = clone $this;
56	100	$clone->fromField = $fromField;
57
58	100	return $clone;
		0 ignored issues – show Bug Best Practice introduced 2018-11-21 23:27 UTC by Report Bug Copy Issue Report The return type of `return $clone;` (`ptlis\ConNeg\Preference\...stractPreferenceBuilder`) is incompatible with the return type declared by the interface `ptlis\ConNeg\Preference\...Interface::setFromField` of type `self`. 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...
59		}
60
61		/**
62		* @inheritDoc
63		*
64		* @throws InvalidVariantException If the provided variant is not valid.
65		*/
66	93	public function setVariant(string $variant): PreferenceBuilderInterface
67		{
68	93	if ($this->isFromServer) {
69	73	$this->validateVariant($variant);
70		}
71
72	90	$clone = clone $this;
73	90	$clone->variant = $this->normalizeVariant($variant);
74
75	90	return $clone;
		0 ignored issues – show Bug Best Practice introduced 2018-11-21 23:27 UTC by Report Bug Copy Issue Report The return type of `return $clone;` (`ptlis\ConNeg\Preference\...stractPreferenceBuilder`) is incompatible with the return type declared by the interface `ptlis\ConNeg\Preference\...erInterface::setVariant` of type `self`. 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...
76		}
77
78		/**
79		* @inheritDoc
80		*
81		* @throws InvalidVariantException If an invalid quality factor in encountered when building an server preference.
82		*/
83	88	public function setQualityFactor(float $qFactor): PreferenceBuilderInterface
84		{
85	88	if ($this->isFromServer && !$this->validQualityFactor($qFactor)) {
86	2	throw new InvalidVariantException('Invalid quality factor "' . $qFactor . '" in server preferences');
87		}
88
89	86	$qFactor = $this->normalizeQualityFactor($qFactor);
90
91	86	$clone = clone $this;
92	86	$clone->qFactor = $qFactor;
93
94	86	return $clone;
		0 ignored issues – show Bug Best Practice introduced 2018-11-21 23:27 UTC by Report Bug Copy Issue Report The return type of `return $clone;` (`ptlis\ConNeg\Preference\...stractPreferenceBuilder`) is incompatible with the return type declared by the interface `ptlis\ConNeg\Preference\...rface::setQualityFactor` of type `self`. 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...
95		}
96
97		/**
98		* Validate the variant, returning true if the variant is valid.
99		*
100		* @throws InvalidVariantException If the provided variant is not valid.
101		*
102		* @param string $variant
103		*/
104		abstract protected function validateVariant(string $variant): void;
105
106		/**
107		* Normalises the variant.
108		*
109		* @param string $variant
110		*
111		* @return string
112		*/
113	54	protected function normalizeVariant(string $variant): string
114		{
115	54	return $variant;
116		}
117
118		/**
119		* Validate the quality factor, returning true if the quality factor is valid.
120		*
121		* @param float $qFactor
122		*
123		* @return bool
124		*/
125	50	private function validQualityFactor(float $qFactor): bool
126		{
127	50	return is_numeric($qFactor) && $qFactor >= 0 && $qFactor <= 1;
128		}
129
130		/**
131		* Normalises the provided quality factor, ensuring that the value returned is a float between 0 and 1 (inclusive).
132		*
133		* @param float $qFactor
134		*
135		* @return float
136		*/
137	86	private function normalizeQualityFactor(float $qFactor): float
138		{
139	86	if (!is_numeric($qFactor)) {
140		$qFactor = 1.0;
141
		0 ignored issues – show Coding Style introduced 2018-11-21 23:27 UTC by Report Bug Copy Issue Report Blank line found at end of control structure Loading history...
142	86	} elseif ($qFactor < 0) {
143	1	$qFactor = 0.0;
144
		0 ignored issues – show Coding Style introduced 2018-11-21 23:27 UTC by Report Bug Copy Issue Report Blank line found at end of control structure Loading history...
145	85	} elseif ($qFactor > 1) {
146	1	$qFactor = 1.0;
147
		0 ignored issues – show Coding Style introduced 2018-11-21 23:27 UTC by Report Bug Copy Issue Report Blank line found at end of control structure Loading history...
148		} else {
149	84	$qFactor = floatval($qFactor);
150		}
151
152	86	return $qFactor;
153		}
154		}
155

ptlis / conneg

Push — feature/new-tests ( d030dc )

normalizeQualityFactor() A

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