UserAgentParser::filter() - Code Metrics - Inspection of "Refactoring" - VIPnytt/UserAgentParser - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 27a152...e09222 )

by Jan-Petter

created 2016-07-14 16:26 UTC

UserAgentParser::filter() A

↳ Parent: UserAgentParser

Complexity

Conditions	3
Paths	3

Size

Total Lines	10
Code Lines	6

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	10
rs	9.4285
cc	3
eloc	6
nc	3
nop	1

<?php
namespace vipnytt;

use vipnytt\UserAgentParser\Exceptions\ProductException;
use vipnytt\UserAgentParser\Exceptions\VersionException;

/**
 * Class UserAgentParser
 *
 * @link https://tools.ietf.org/html/rfc7231#section-5.5.3
 * @link https://tools.ietf.org/html/rfc7230
 *
 * @package vipnytt
 */
class UserAgentParser
{
    const RFC_README = 'https://tools.ietf.org/html/rfc7231#section-5.5.3';

    /**
     * Product
     * @var string
     */
    private $product;

    /**
     * Version
     * @var string
     */
    private $version;

    /**
     * Constructor
     *
     * @param string $product
     * @param int|string|null $version
     */
    public function __construct($product, $version = null)
    {
        $this->product = $product;
        $this->version = $version;
class Id
{
    public $id;

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

}

class Account
{
    /** @var  Id $id */
    public $id;
}

$account_id = false;

if (starsAreRight()) {
    $account_id = new Id(42);
}

$account = new Account();
if ($account instanceof Id)
{
    $account->id = $account_id;
}
        if (strpos($this->product, '/') !== false) {
            $this->split();
        }
        $this->validateProduct();
        $this->validateVersion();
    }

    private function split()
    {
        if (count($parts = explode('/', trim($this->product . '/' . $this->version, '/'), 2)) === 2) {
            $this->product = $parts[0];
            $this->version = $parts[1];
        }
    }

    /**
     * Validate the Product format
     * @link https://tools.ietf.org/html/rfc7230#section-3.2.4
     *
     * @throws ProductException
     */
    private function validateProduct()
    {
        foreach (
            [
                'mozilla',
                'compatible',
                '(',
                ')',
                ' ',
            ] as $blacklisted
        ) {
            if (
                stripos($this->product, $blacklisted) !== false ||
                empty($this->product)
            ) {
                throw new ProductException('Invalid product format (`' . $this->product . '`). Examples of valid User-agents: `MyCustomBot`, `MyFetcher-news`, `MyCrawler/2.1` and `MyBot-images/1.2`. See also ' . self::RFC_README);
            }
        }
        if ($this->product !== ($new = preg_replace('/[^\x21-\x7E]/', '', $this->product))) {
            trigger_error("Product name contains invalid characters. Truncated to `$new`.", E_USER_WARNING);
        }
    }

    /**
     * Validate the Version and it's format
     *
     * @throws VersionException
     */
    private function validateVersion()
    {
        if (
            $this->version !== null &&
            (
                empty($this->version) ||
                preg_match('/[^0-9.]/', $this->version) ||
                version_compare($this->version, '0.0.1', '>=') === false
            )
        ) {
            throw new VersionException('Invalid version format (`' . $this->version . '`). See http://semver.org/ for guidelines. In addition, dev/alpha/beta/rc tags is disallowed. See also ' . self::RFC_README);
        }
    }

    /**
     * Find the best matching User-agent
     *
     * @param string[] $userAgents
     * @return string|false
     */
    public function getMostSpecific(array $userAgents)
    {
        $array = [];
        foreach ($userAgents as $string) {
            // Strip non-US-ASCII characters
            $array[$string] = strtolower(preg_replace('/[^\x21-\x7E]/', '', $string));
        }
        foreach (array_map('strtolower', $this->getUserAgents()) as $generated) {
            if (($result = array_search($generated, $array)) !== false) {
                // Match found
                return $result;
            }
        }
        return false;
    }

    /**
     * Get an array of all possible User-agent combinations
     *
     * @return array
     */
    public function getUserAgents()
    {
        return array_merge(
            preg_filter('/^/', $this->product . '/', $this->getVersions()),
            $this->getProducts()
        );
    }

    /**
     * Get versions
     *
     * @return array
     */
    public function getVersions()
    {
        while (substr_count($this->version, '.') < 2) {
            $this->version .= '.0';
        }
        // Remove part by part of the version.
        $result = array_merge(
            [$this->version],
            $this->explode($this->version, '.')
        );
        asort($result);
        usort($result, function ($a, $b) {
            return strlen($b) - strlen($a);
        });
        return $this->filter($result);
    }

    /**
     * Explode
     *
     * @param string $string
     * @param string $delimiter
     * @return array
     */
    private function explode($string, $delimiter)
    {
        $result = [];
        while (($pos = strrpos($string, $delimiter)) !== false) {
            $result[] = ($string = substr($string, 0, $pos));
        }
        return $result;
    }

    /**
     * Filter duplicates from an array
     *
     * @param string[] $array
     * @return array
     */
    private function filter($array)
    {
        $result = [];
        foreach ($array as $value) {
            if (!in_array($array, $result)) {
                $result[] = $value;
            }
        }
        return array_filter($result);
    }

    /**
     * Get products
     *
     * @return array
     */
    public function getProducts()
    {
        $result = array_merge(
            [
                $this->product,
                preg_replace('/[^A-Za-z0-9]/', '', $this->product), // in case of special characters
            ],
            $this->explode($this->product, '-')
        );
        return $this->filter($result);
    }

    /**
     * Get User-agent
     *
     * @return string
     */
    public function getUserAgent()
    {
        return $this->getVersion() === null ? $this->getProduct() : $this->getProduct() . '/' . $this->getVersion();
    }

    /**
     * Get version
     *
     * @return string
     */
    public function getVersion()
    {
        if (empty($this->version)) {
            return null;
        }
        return trim($this->version, '.0');
    }

    /**
     * Get product
     *
     * @return string
     */
    public function getProduct()
    {
        return $this->product;
    }
}


1			<?php
2			namespace vipnytt;
3
4			use vipnytt\UserAgentParser\Exceptions\ProductException;
5			use vipnytt\UserAgentParser\Exceptions\VersionException;
6
7			/**
8			* Class UserAgentParser
9			*
10			* @link https://tools.ietf.org/html/rfc7231#section-5.5.3
11			* @link https://tools.ietf.org/html/rfc7230
12			*
13			* @package vipnytt
14			*/
15			class UserAgentParser
16			{
17			const RFC_README = 'https://tools.ietf.org/html/rfc7231#section-5.5.3';
18
19			/**
20			* Product
21			* @var string
22			*/
23			private $product;
24
25			/**
26			* Version
27			* @var string
28			*/
29			private $version;
30
31			/**
32			* Constructor
33			*
34			* @param string $product
35			* @param int\|string\|null $version
36			*/
37			public function __construct($product, $version = null)
38			{
39			$this->product = $product;
40			$this->version = $version;
			0 ignored issues – show Documentation Bug introduced 2016-07-14 16:29 UTC by Report Bug Copy Issue Report It seems like `$version` can also be of type `integer`. However, the property `$version` is declared as type `string`. Maybe add an additional type check? Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly. For example, imagine you have a variable `$accountId` that can either hold an Id object or false (if there is no account id yet). Your code now assigns that value to the `id` property of an instance of the `Account` class. This class holds a proper account, so the id value must no longer be false. Either this assignment is in error or a type check should be added for that assignment. class Id { public $id; public function __construct($id) { $this->id = $id; } } class Account { /** @var Id $id */ public $id; } $account_id = false; if (starsAreRight()) { $account_id = new Id(42); } $account = new Account(); if ($account instanceof Id) { $account->id = $account_id; } Loading history...
41			if (strpos($this->product, '/') !== false) {
42			$this->split();
43			}
44			$this->validateProduct();
45			$this->validateVersion();
46			}
47
48			private function split()
49			{
50			if (count($parts = explode('/', trim($this->product . '/' . $this->version, '/'), 2)) === 2) {
51			$this->product = $parts[0];
52			$this->version = $parts[1];
53			}
54			}
55
56			/**
57			* Validate the Product format
58			* @link https://tools.ietf.org/html/rfc7230#section-3.2.4
59			*
60			* @throws ProductException
61			*/
62			private function validateProduct()
63			{
64			foreach (
65			[
66			'mozilla',
67			'compatible',
68			'(',
69			')',
70			' ',
71			] as $blacklisted
72			) {
73			if (
74			stripos($this->product, $blacklisted) !== false \|\|
75			empty($this->product)
76			) {
77			throw new ProductException('Invalid product format (`' . $this->product . '`). Examples of valid User-agents: `MyCustomBot`, `MyFetcher-news`, `MyCrawler/2.1` and `MyBot-images/1.2`. See also ' . self::RFC_README);
78			}
79			}
80			if ($this->product !== ($new = preg_replace('/[^\x21-\x7E]/', '', $this->product))) {
81			trigger_error("Product name contains invalid characters. Truncated to `$new`.", E_USER_WARNING);
82			}
83			}
84
85			/**
86			* Validate the Version and it's format
87			*
88			* @throws VersionException
89			*/
90			private function validateVersion()
91			{
92			if (
93			$this->version !== null &&
94			(
95			empty($this->version) \|\|
96			preg_match('/[^0-9.]/', $this->version) \|\|
97			version_compare($this->version, '0.0.1', '>=') === false
98			)
99			) {
100			throw new VersionException('Invalid version format (`' . $this->version . '`). See http://semver.org/ for guidelines. In addition, dev/alpha/beta/rc tags is disallowed. See also ' . self::RFC_README);
101			}
102			}
103
104			/**
105			* Find the best matching User-agent
106			*
107			* @param string[] $userAgents
108			* @return string\|false
109			*/
110			public function getMostSpecific(array $userAgents)
111			{
112			$array = [];
113			foreach ($userAgents as $string) {
114			// Strip non-US-ASCII characters
115			$array[$string] = strtolower(preg_replace('/[^\x21-\x7E]/', '', $string));
116			}
117			foreach (array_map('strtolower', $this->getUserAgents()) as $generated) {
118			if (($result = array_search($generated, $array)) !== false) {
119			// Match found
120			return $result;
121			}
122			}
123			return false;
124			}
125
126			/**
127			* Get an array of all possible User-agent combinations
128			*
129			* @return array
130			*/
131			public function getUserAgents()
132			{
133			return array_merge(
134			preg_filter('/^/', $this->product . '/', $this->getVersions()),
135			$this->getProducts()
136			);
137			}
138
139			/**
140			* Get versions
141			*
142			* @return array
143			*/
144			public function getVersions()
145			{
146			while (substr_count($this->version, '.') < 2) {
147			$this->version .= '.0';
148			}
149			// Remove part by part of the version.
150			$result = array_merge(
151			[$this->version],
152			$this->explode($this->version, '.')
153			);
154			asort($result);
155			usort($result, function ($a, $b) {
156			return strlen($b) - strlen($a);
157			});
158			return $this->filter($result);
159			}
160
161			/**
162			* Explode
163			*
164			* @param string $string
165			* @param string $delimiter
166			* @return array
167			*/
168			private function explode($string, $delimiter)
169			{
170			$result = [];
171			while (($pos = strrpos($string, $delimiter)) !== false) {
172			$result[] = ($string = substr($string, 0, $pos));
173			}
174			return $result;
175			}
176
177			/**
178			* Filter duplicates from an array
179			*
180			* @param string[] $array
181			* @return array
182			*/
183			private function filter($array)
184			{
185			$result = [];
186			foreach ($array as $value) {
187			if (!in_array($array, $result)) {
188			$result[] = $value;
189			}
190			}
191			return array_filter($result);
192			}
193
194			/**
195			* Get products
196			*
197			* @return array
198			*/
199			public function getProducts()
200			{
201			$result = array_merge(
202			[
203			$this->product,
204			preg_replace('/[^A-Za-z0-9]/', '', $this->product), // in case of special characters
205			],
206			$this->explode($this->product, '-')
207			);
208			return $this->filter($result);
209			}
210
211			/**
212			* Get User-agent
213			*
214			* @return string
215			*/
216			public function getUserAgent()
217			{
218			return $this->getVersion() === null ? $this->getProduct() : $this->getProduct() . '/' . $this->getVersion();
219			}
220
221			/**
222			* Get version
223			*
224			* @return string
225			*/
226			public function getVersion()
227			{
228			if (empty($this->version)) {
229			return null;
230			}
231			return trim($this->version, '.0');
232			}
233
234			/**
235			* Get product
236			*
237			* @return string
238			*/
239			public function getProduct()
240			{
241			return $this->product;
242			}
243			}
244

VIPnytt / UserAgentParser

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UserAgentParser::filter() A

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