HyphenatedRangeParser::canParse() - Code Metrics - Inspection of "Add tests for HyphenatedRangeParser, improve robus..." - ptlis/semantic-version - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 8d7014...4fa85a )

by brian

created 2017-02-04 17:57 UTC

HyphenatedRangeParser::canParse() C

↳ Parent: HyphenatedRangeParser

Complexity

Conditions	13
Paths	17

Size

Total Lines	40
Code Lines	27

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	23
CRAP Score	13

Importance

Changes

Metric	Value
dl	0
loc	40
ccs	23
cts	23
cp	1
rs	5.1234
c	0
b	0
f	0
cc	13
eloc	27
nc	17
nop	1
crap	13

How to fix Complexity

<?php

/**
 * @copyright   (c) 2014-2017 brian ridley
 * @author      brian ridley <[email protected]>
 * @license     http://opensource.org/licenses/MIT MIT
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace ptlis\SemanticVersion\Parse\Matcher;

use ptlis\SemanticVersion\Comparator\ComparatorInterface;
use ptlis\SemanticVersion\Parse\Token;
use ptlis\SemanticVersion\Version\Label\LabelBuilder;
use ptlis\SemanticVersion\Version\Version;
use ptlis\SemanticVersion\Version\VersionBuilder;
use ptlis\SemanticVersion\VersionRange\ComparatorVersion;
use ptlis\SemanticVersion\VersionRange\LogicalAnd;
use ptlis\SemanticVersion\VersionRange\VersionRangeInterface;

/**
 * Parser for hyphenated ranges.
 *
 * Hyphenated ranges are implemented as described @ https://getcomposer.org/doc/articles/versions.md#range-hyphen-
 */
final class HyphenatedRangeParser implements RangeParserInterface
{
    /**
     * @var VersionBuilder
     */
    private $versionBuilder;

    /**
     * @var ComparatorInterface
     */
    private $greaterOrEqualTo;

    /**
     * @var ComparatorInterface
     */
    private $lessThan;

    /**
     * @var ComparatorInterface
     */
    private $lessOrEqualTo;


    /**
     * Constructor.
     *
     * @param VersionBuilder $versionBuilder
     * @param ComparatorInterface $greaterOrEqualTo
     * @param ComparatorInterface $lessThan
     * @param ComparatorInterface $lessOrEqualTo
     */
    public function __construct(
        VersionBuilder $versionBuilder,
        ComparatorInterface $greaterOrEqualTo,
        ComparatorInterface $lessThan,
        ComparatorInterface $lessOrEqualTo
    ) {
        $this->versionBuilder = $versionBuilder;
        $this->greaterOrEqualTo = $greaterOrEqualTo;
        $this->lessThan = $lessThan;
        $this->lessOrEqualTo = $lessOrEqualTo;
    }

    /**
     * Returns true if the token list can be parsed as a hyphenated range.
     *
     * @param Token[] $tokenList
     *
     * @return boolean
     */
    public function canParse(array $tokenList)
    {
        $isRange = false;

        $chunkedList = $this->chunk($tokenList);
        switch (count($chunkedList)) {
            case 2:
                $isRange = (
                    Token::DIGITS === $chunkedList[0][0]->getType()
                    && Token::DIGITS === $chunkedList[1][0]->getType()
                );
                break;

            case 3:
                $isRange = (
                    (
                        Token::DIGITS === $chunkedList[0][0]->getType()
                        && Token::LABEL_STRING === $chunkedList[1][0]->getType()
                        && Token::DIGITS === $chunkedList[2][0]->getType()
                    )
                    || (
                        Token::DIGITS === $chunkedList[0][0]->getType()
                        && Token::DIGITS === $chunkedList[1][0]->getType()
                        && Token::LABEL_STRING === $chunkedList[2][0]->getType()
                    )
                );
                break;

            case 4:
                $isRange = (
                    Token::DIGITS === $chunkedList[0][0]->getType()
                    && Token::LABEL_STRING === $chunkedList[1][0]->getType()
                    && Token::DIGITS === $chunkedList[2][0]->getType()
                    && Token::LABEL_STRING === $chunkedList[3][0]->getType()
                );
                break;
        }

        return $isRange;
    }

    /**
     * Build a ComparatorVersion representing the hyphenated range.
     *
     * @param Token[] $tokenList
     *
     * @return VersionRangeInterface
     */
    public function parse(array $tokenList)
    {
        if (!$this->canParse($tokenList)) {
            throw new \RuntimeException('Invalid version');
        }

        $chunkedList = $this->chunk($tokenList);

        switch (count($chunkedList)) {


            // No labels
            case 2:
                $lowerVersionConstraint = $this->getLowerConstraint($chunkedList[0]);

                $upperVersionConstraint = $this->getUpperConstraint($chunkedList[1]);

                break;

            // Label on one version
            case 3:
                // Label belongs to first version
                if (Token::LABEL_STRING === $chunkedList[1][0]->getType()) {
                    $lowerVersionConstraint = $this->getLowerConstraint($chunkedList[0], $chunkedList[1]);
                    $upperVersionConstraint = $this->getUpperConstraint($chunkedList[2]);

                // Label belongs to second version
                } else if (Token::LABEL_STRING === $chunkedList[2][0]->getType()) {
                    $lowerVersionConstraint = $this->getLowerConstraint($chunkedList[0]);
                    $upperVersionConstraint = $this->getUpperConstraint($chunkedList[1], $chunkedList[2]);
                }

                break;

            // Label on both versions
            case 4:
                $lowerVersionConstraint = $this->getLowerConstraint($chunkedList[0], $chunkedList[1]);
                $upperVersionConstraint = $this->getUpperConstraint($chunkedList[2], $chunkedList[3]);
                break;

            default:
                throw new \RuntimeException('Invalid version');
        }

        return new LogicalAnd(
            $lowerVersionConstraint,
            $upperVersionConstraint
        );
    }

    /**
     * Chuck the tokens, splitting on hyphen.
     *
     * @param Token[] $tokenList
     *
     * @return Token[][]
     */
    private function chunk(array $tokenList)
    {
        $tokenListCount = count($tokenList);
        $chunkedList = [];
        $accumulator = [];

        for ($i = 0; $i < $tokenListCount; $i++) {
            $token = $tokenList[$i];

            // Accumulate until we hit a dash
            if (Token::DASH_SEPARATOR !== $token->getType()) {
                $accumulator[] = $token;


            } else {
                $chunkedList[] = $accumulator;
                $accumulator = [];
            }
        }

        if (count($accumulator)) {
            $chunkedList[] = $accumulator;
        }

        return $chunkedList;
    }

    /**
     * Determines the correct lower version constraint for a hyphenated range.
     *
     * @param Token[] $versionTokenList
     * @param Token[] $labelTokenList
     *
     * @return VersionRangeInterface
     */
    private function getLowerConstraint(array $versionTokenList, array $labelTokenList = [])
    {
        return new ComparatorVersion(
            $this->greaterOrEqualTo,
            $this->versionBuilder->buildFromTokens($versionTokenList, $labelTokenList)
/** @return stdClass|null */
function mayReturnNull() { }

function doesNotAcceptNull(stdClass $x) { }

// With potential error.
function withoutCheck() {
    $x = mayReturnNull();
    doesNotAcceptNull($x); // Potential error here.
}

// Safe - Alternative 1
function withCheck1() {
    $x = mayReturnNull();
    if ( ! $x instanceof stdClass) {
        throw new \LogicException('$x must be defined.');
    }
    doesNotAcceptNull($x);
}

// Safe - Alternative 2
function withCheck2() {
    $x = mayReturnNull();
    if ($x instanceof stdClass) {
        doesNotAcceptNull($x);
    }
}
        );
    }

    /**
     * Determines the correct upper version constraint for a hyphenated range.
     *
     * @param Token[] $versionTokenList
     * @param Token[] $labelTokenList
     *
     * @return VersionRangeInterface
     */
    private function getUpperConstraint(array $versionTokenList, array $labelTokenList = [])
    {
        $major = 0;
        $minor = 0;
        $patch = 0;
        $label = null;
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
        $comparator = $this->lessThan;
        $labelBuilder = new LabelBuilder();

        switch (count($versionTokenList)) {
            case 1:
                $major = $versionTokenList[0]->getValue() + 1;
                break;

            case 3:
                $major = $versionTokenList[0]->getValue();
                $minor = $versionTokenList[2]->getValue() + 1;
                break;

            case 5:
                $comparator = $this->lessOrEqualTo;
                $major = $versionTokenList[0]->getValue();
                $minor = $versionTokenList[2]->getValue();
                $patch = $versionTokenList[4]->getValue();
                break;
        }

        return new ComparatorVersion(
            $comparator,
            new Version(
                $major,
                $minor,
                $patch,
                $labelBuilder->buildFromTokens($labelTokenList)
            )
        );
    }
}


1		<?php
2
3		/**
4		* @copyright (c) 2014-2017 brian ridley
5		* @author brian ridley <[email protected]>
6		* @license http://opensource.org/licenses/MIT MIT
7		*
8		* For the full copyright and license information, please view the LICENSE
9		* file that was distributed with this source code.
10		*/
11
12		namespace ptlis\SemanticVersion\Parse\Matcher;
13
14		use ptlis\SemanticVersion\Comparator\ComparatorInterface;
15		use ptlis\SemanticVersion\Parse\Token;
16		use ptlis\SemanticVersion\Version\Label\LabelBuilder;
17		use ptlis\SemanticVersion\Version\Version;
18		use ptlis\SemanticVersion\Version\VersionBuilder;
19		use ptlis\SemanticVersion\VersionRange\ComparatorVersion;
20		use ptlis\SemanticVersion\VersionRange\LogicalAnd;
21		use ptlis\SemanticVersion\VersionRange\VersionRangeInterface;
22
23		/**
24		* Parser for hyphenated ranges.
25		*
26		* Hyphenated ranges are implemented as described @ https://getcomposer.org/doc/articles/versions.md#range-hyphen-
27		*/
28		final class HyphenatedRangeParser implements RangeParserInterface
29		{
30		/**
31		* @var VersionBuilder
32		*/
33		private $versionBuilder;
34
35		/**
36		* @var ComparatorInterface
37		*/
38		private $greaterOrEqualTo;
39
40		/**
41		* @var ComparatorInterface
42		*/
43		private $lessThan;
44
45		/**
46		* @var ComparatorInterface
47		*/
48		private $lessOrEqualTo;
49
50
51		/**
52		* Constructor.
53		*
54		* @param VersionBuilder $versionBuilder
55		* @param ComparatorInterface $greaterOrEqualTo
56		* @param ComparatorInterface $lessThan
57		* @param ComparatorInterface $lessOrEqualTo
58		*/
59	11	public function __construct(
60		VersionBuilder $versionBuilder,
61		ComparatorInterface $greaterOrEqualTo,
62		ComparatorInterface $lessThan,
63		ComparatorInterface $lessOrEqualTo
64		) {
65	11	$this->versionBuilder = $versionBuilder;
66	11	$this->greaterOrEqualTo = $greaterOrEqualTo;
67	11	$this->lessThan = $lessThan;
68	11	$this->lessOrEqualTo = $lessOrEqualTo;
69	11	}
70
71		/**
72		* Returns true if the token list can be parsed as a hyphenated range.
73		*
74		* @param Token[] $tokenList
75		*
76		* @return boolean
77		*/
78	11	public function canParse(array $tokenList)
79		{
80	11	$isRange = false;
81
82	11	$chunkedList = $this->chunk($tokenList);
83	11	switch (count($chunkedList)) {
84	11	case 2:
85		$isRange = (
86	4	Token::DIGITS === $chunkedList[0][0]->getType()
87	4	&& Token::DIGITS === $chunkedList[1][0]->getType()
88		);
89	4	break;
90
91	7	case 3:
92		$isRange = (
93		(
94	3	Token::DIGITS === $chunkedList[0][0]->getType()
95	3	&& Token::LABEL_STRING === $chunkedList[1][0]->getType()
96	1	&& Token::DIGITS === $chunkedList[2][0]->getType()
97		)
98		\|\| (
99	2	Token::DIGITS === $chunkedList[0][0]->getType()
100	2	&& Token::DIGITS === $chunkedList[1][0]->getType()
101	3	&& Token::LABEL_STRING === $chunkedList[2][0]->getType()
102		)
103		);
104	3	break;
105
106	4	case 4:
107		$isRange = (
108	2	Token::DIGITS === $chunkedList[0][0]->getType()
109	2	&& Token::LABEL_STRING === $chunkedList[1][0]->getType()
110	2	&& Token::DIGITS === $chunkedList[2][0]->getType()
111	2	&& Token::LABEL_STRING === $chunkedList[3][0]->getType()
112		);
113	2	break;
114		}
115
116	11	return $isRange;
117		}
118
119		/**
120		* Build a ComparatorVersion representing the hyphenated range.
121		*
122		* @param Token[] $tokenList
123		*
124		* @return VersionRangeInterface
125		*/
126	10	public function parse(array $tokenList)
127		{
128	10	if (!$this->canParse($tokenList)) {
129	4	throw new \RuntimeException('Invalid version');
130		}
131
132	6	$chunkedList = $this->chunk($tokenList);
133
134	6	switch (count($chunkedList)) {
		1 ignored issue – show Coding Style introduced 2017-01-30 21:43 UTC by Report Bug Copy Issue Report Blank line found at start of control structure Loading history...
135
136		// No labels
137	6	case 2:
138	3	$lowerVersionConstraint = $this->getLowerConstraint($chunkedList[0]);
		0 ignored issues – show Comprehensibility Naming introduced 2017-01-30 21:43 UTC by Report Bug Copy Issue Report The variable name `$lowerVersionConstraint` exceeds the maximum configured length of `20`. Very long variable names usually make code harder to read. It is therefore recommended not to make variable names too verbose. Loading history...
139	3	$upperVersionConstraint = $this->getUpperConstraint($chunkedList[1]);
		0 ignored issues – show Comprehensibility Naming introduced 2017-01-30 21:43 UTC by Report Bug Copy Issue Report The variable name `$upperVersionConstraint` exceeds the maximum configured length of `20`. Very long variable names usually make code harder to read. It is therefore recommended not to make variable names too verbose. Loading history...
140	3	break;
141
142		// Label on one version
143	3	case 3:
144		// Label belongs to first version
145	2	if (Token::LABEL_STRING === $chunkedList[1][0]->getType()) {
146	1	$lowerVersionConstraint = $this->getLowerConstraint($chunkedList[0], $chunkedList[1]);
147	1	$upperVersionConstraint = $this->getUpperConstraint($chunkedList[2]);
148
149		// Label belongs to second version
150	1	} else if (Token::LABEL_STRING === $chunkedList[2][0]->getType()) {
151	1	$lowerVersionConstraint = $this->getLowerConstraint($chunkedList[0]);
152	1	$upperVersionConstraint = $this->getUpperConstraint($chunkedList[1], $chunkedList[2]);
153		}
154
155	2	break;
156
157		// Label on both versions
158	1	case 4:
159	1	$lowerVersionConstraint = $this->getLowerConstraint($chunkedList[0], $chunkedList[1]);
160	1	$upperVersionConstraint = $this->getUpperConstraint($chunkedList[2], $chunkedList[3]);
161	1	break;
162
163		default:
164		throw new \RuntimeException('Invalid version');
165		}
166
167	6	return new LogicalAnd(
168		$lowerVersionConstraint,
169		$upperVersionConstraint
170		);
171		}
172
173		/**
174		* Chuck the tokens, splitting on hyphen.
175		*
176		* @param Token[] $tokenList
177		*
178		* @return Token[][]
179		*/
180	11	private function chunk(array $tokenList)
181		{
182	11	$tokenListCount = count($tokenList);
183	11	$chunkedList = [];
184	11	$accumulator = [];
185
186	11	for ($i = 0; $i < $tokenListCount; $i++) {
187	11	$token = $tokenList[$i];
188
189		// Accumulate until we hit a dash
190	11	if (Token::DASH_SEPARATOR !== $token->getType()) {
191	11	$accumulator[] = $token;
192
		1 ignored issue – show Coding Style introduced 2017-01-30 21:43 UTC by Report Bug Copy Issue Report Blank line found at end of control structure Loading history...
193		} else {
194	10	$chunkedList[] = $accumulator;
195	10	$accumulator = [];
196		}
197		}
198
199	11	if (count($accumulator)) {
200	11	$chunkedList[] = $accumulator;
201		}
202
203	11	return $chunkedList;
204		}
205
206		/**
207		* Determines the correct lower version constraint for a hyphenated range.
208		*
209		* @param Token[] $versionTokenList
210		* @param Token[] $labelTokenList
211		*
212		* @return VersionRangeInterface
213		*/
214	6	private function getLowerConstraint(array $versionTokenList, array $labelTokenList = [])
215		{
216	6	return new ComparatorVersion(
217	6	$this->greaterOrEqualTo,
218	6	$this->versionBuilder->buildFromTokens($versionTokenList, $labelTokenList)
		0 ignored issues – show Bug introduced 2017-01-30 21:43 UTC by Report Bug Copy Issue Report It seems like `$this->versionBuilder->b...nList, $labelTokenList)` can be `null`; however, `__construct()` does not accept `null`, maybe add an additional type check? Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: /** @return stdClass\|null */ function mayReturnNull() { } function doesNotAcceptNull(stdClass $x) { } // With potential error. function withoutCheck() { $x = mayReturnNull(); doesNotAcceptNull($x); // Potential error here. } // Safe - Alternative 1 function withCheck1() { $x = mayReturnNull(); if ( ! $x instanceof stdClass) { throw new \LogicException('$x must be defined.'); } doesNotAcceptNull($x); } // Safe - Alternative 2 function withCheck2() { $x = mayReturnNull(); if ($x instanceof stdClass) { doesNotAcceptNull($x); } } Loading history...
219		);
220		}
221
222		/**
223		* Determines the correct upper version constraint for a hyphenated range.
224		*
225		* @param Token[] $versionTokenList
226		* @param Token[] $labelTokenList
227		*
228		* @return VersionRangeInterface
229		*/
230	6	private function getUpperConstraint(array $versionTokenList, array $labelTokenList = [])
231		{
232	6	$major = 0;
233	6	$minor = 0;
234	6	$patch = 0;
235	6	$label = null;
		0 ignored issues – show Unused Code introduced 2017-01-30 21:43 UTC by Report Bug Copy Issue Report `$label` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
236	6	$comparator = $this->lessThan;
237	6	$labelBuilder = new LabelBuilder();
238
239	6	switch (count($versionTokenList)) {
240	6	case 1:
241	1	$major = $versionTokenList[0]->getValue() + 1;
242	1	break;
243
244	5	case 3:
245	1	$major = $versionTokenList[0]->getValue();
246	1	$minor = $versionTokenList[2]->getValue() + 1;
247	1	break;
248
249	4	case 5:
250	4	$comparator = $this->lessOrEqualTo;
251	4	$major = $versionTokenList[0]->getValue();
252	4	$minor = $versionTokenList[2]->getValue();
253	4	$patch = $versionTokenList[4]->getValue();
254	4	break;
255		}
256
257	6	return new ComparatorVersion(
258		$comparator,
259	6	new Version(
260		$major,
261		$minor,
262		$patch,
263	6	$labelBuilder->buildFromTokens($labelTokenList)
264		)
265		);
266		}
267		}
268

ptlis / semantic-version

Push — master ( 8d7014...4fa85a )

HyphenatedRangeParser::canParse() C

Complexity

Size

Duplication

Code Coverage

Importance

How to fix Complexity

Long Method

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