NameStmtPrefixer::prefixName() - Code Metrics - Inspection of "Not adding prefixes to names after use statements" - humbug/php-scoper - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#457)

by Gena

created 2021-02-28 17:43 UTC

NameStmtPrefixer::prefixName() D

↳ Parent: NameStmtPrefixer

Complexity

Conditions	53
Paths	45

Size

Total Lines	123
Code Lines	70

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	54
CRAP Score	53

Importance

Changes	5
Bugs	0	Features	0

Metric	Value
cc	53
eloc	70
c	5
b	0
f	0
nc	45
nop	1
dl	0
loc	123
ccs	54
cts	54
cp	1
crap	53
rs	4.1666

How to fix Long Method Complexity

<?php

declare(strict_types=1);

/*
 * This file is part of the humbug/php-scoper package.
 *
 * Copyright (c) 2017 Théo FIDRY <[email protected]>,
 *                    Pádraic Brady <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Humbug\PhpScoper\PhpParser\NodeVisitor;

use Humbug\PhpScoper\PhpParser\Node\FullyQualifiedFactory;
use Humbug\PhpScoper\PhpParser\NodeVisitor\NamespaceStmt\NamespaceStmtCollection;
use Humbug\PhpScoper\PhpParser\NodeVisitor\Resolver\FullyQualifiedNameResolver;
use Humbug\PhpScoper\PhpParser\NodeVisitor\UseStmt\UseStmtCollection;
use Humbug\PhpScoper\Reflector;
use Humbug\PhpScoper\Whitelist;
use PhpParser\Node;
use PhpParser\Node\Expr\ArrowFunction;
use PhpParser\Node\Expr\ClassConstFetch;
use PhpParser\Node\Expr\ConstFetch;
use PhpParser\Node\Expr\FuncCall;
use PhpParser\Node\Expr\Instanceof_;
use PhpParser\Node\Expr\New_;
use PhpParser\Node\Expr\StaticCall;
use PhpParser\Node\Expr\StaticPropertyFetch;
use PhpParser\Node\Name;
use PhpParser\Node\Name\FullyQualified;
use PhpParser\Node\NullableType;
use PhpParser\Node\Param;
use PhpParser\Node\Stmt\Catch_;
use PhpParser\Node\Stmt\Class_;
use PhpParser\Node\Stmt\ClassMethod;
use PhpParser\Node\Stmt\Function_;
use PhpParser\Node\Stmt\Interface_;
use PhpParser\Node\Stmt\Property;
use PhpParser\NodeVisitorAbstract;
use function count;
use function in_array;

/**
 * Prefixes names when appropriate.
 *
 * ```
 * new Foo\Bar();
 * ```.
 *
 * =>
 *
 * ```
 * new \Humbug\Foo\Bar();
 * ```
 *
 * @private
 */
final class NameStmtPrefixer extends NodeVisitorAbstract
{
    public const PHP_FUNCTION_KEYWORDS = [
        'self',
        'static',
        'parent',
    ];

    private $prefix;
    private $whitelist;
    private $namespaceStatements;
    private $useStatements;
    private $nameResolver;
    private $reflector;

    public function __construct(
        string $prefix,
        Whitelist $whitelist,
        NamespaceStmtCollection $namespaceStatements,
        UseStmtCollection $useStatements,
        FullyQualifiedNameResolver $nameResolver,
        Reflector $reflector
    ) {
        $this->prefix = $prefix;
        $this->whitelist = $whitelist;
        $this->namespaceStatements = $namespaceStatements;
        $this->useStatements = $useStatements;
        $this->nameResolver = $nameResolver;
        $this->reflector = $reflector;
    }

    /**
     * @inheritdoc
     */
    public function enterNode(Node $node): Node
    {
        return ($node instanceof Name && ParentNodeAppender::hasParent($node))
            ? $this->prefixName($node)
            : $node
        ;
    }

    private function prefixName(Name $name): Node
    {
        $parentNode = ParentNodeAppender::getParent($name);

        if ($parentNode instanceof NullableType) {
            if (false === ParentNodeAppender::hasParent($parentNode)) {
                return $name;
            }

            $parentNode = ParentNodeAppender::getParent($parentNode);
        }

        if (false === (
            $parentNode instanceof ArrowFunction
                || $parentNode instanceof Catch_
                || $parentNode instanceof ConstFetch
                || $parentNode instanceof Class_
                || $parentNode instanceof ClassConstFetch
                || $parentNode instanceof ClassMethod
                || $parentNode instanceof FuncCall
                || $parentNode instanceof Function_
                || $parentNode instanceof Instanceof_
                || $parentNode instanceof Interface_
                || $parentNode instanceof New_
                || $parentNode instanceof Param
                || $parentNode instanceof Property
                || $parentNode instanceof StaticCall
                || $parentNode instanceof StaticPropertyFetch
        )
        ) {
            return $name;
        }

        if (
            (
                $parentNode instanceof Catch_
                || $parentNode instanceof ClassConstFetch
                || $parentNode instanceof New_
                || $parentNode instanceof FuncCall
                || $parentNode instanceof Instanceof_
                || $parentNode instanceof Param
                || $parentNode instanceof StaticCall
                || $parentNode instanceof StaticPropertyFetch
            )
            && in_array((string) $name, self::PHP_FUNCTION_KEYWORDS, true)
        ) {
            return $name;
        }

        if ($parentNode instanceof ConstFetch && 'null' === (string) $name) {
            return $name;
        }

        $resolvedName = $this->nameResolver->resolveName($name)->getName();

        // Do not prefix if there is a matching use statement.
        $useStatement = $this->useStatements->findStatementForNode($this->namespaceStatements->findNamespaceForNode($name), $name);
        if (
            $useStatement !== null and
            self::array_starts_with($resolvedName->parts, $useStatement->parts) and
            !($parentNode instanceof ConstFetch and ($this->whitelist->isGlobalWhitelistedConstant($resolvedName->toString()) or $this->whitelist->isSymbolWhitelisted($resolvedName->toString(), true))) and
            !($useStatement->getAttribute('parent') and $useStatement->getAttribute('parent')->alias !== null and $this->whitelist->isSymbolWhitelisted($useStatement->toString())) and
            !($name instanceof FullyQualified)
        ) {
            return $name;
        }

        if ($this->prefix === $resolvedName->getFirst() // Skip if is already prefixed
            || $this->whitelist->belongsToWhitelistedNamespace((string) $resolvedName)  // Skip if the namespace node is whitelisted
        ) {
            return $resolvedName;
        }

        // Check if the class can be prefixed
        if (false === ($parentNode instanceof ConstFetch || $parentNode instanceof FuncCall)
            && $this->reflector->isClassInternal($resolvedName->toString())
        ) {
            return $resolvedName;
        }

        if ($parentNode instanceof ConstFetch) {
            if ($this->whitelist->isSymbolWhitelisted($resolvedName->toString(), true)) {
                return $resolvedName;
            }

            if ($this->reflector->isConstantInternal($resolvedName->toString())) {
                return new FullyQualified($resolvedName->toString(), $resolvedName->getAttributes());
            }

            // Constants have an autoloading fallback so we cannot prefix them when the name is ambiguous
            // See https://wiki.php.net/rfc/fallback-to-root-scope-deprecation
            if (false === ($resolvedName instanceof FullyQualified)) {
                return $resolvedName;
            }

            if ($this->whitelist->isGlobalWhitelistedConstant((string) $resolvedName)) {
                // Unlike classes & functions, whitelisted are not prefixed with aliases registered in scoper-autoload.php
                return new FullyQualified($resolvedName->toString(), $resolvedName->getAttributes());
            }

            // Continue
        }

        // Functions have a fallback autoloading so we cannot prefix them when the name is ambiguous
        // See https://wiki.php.net/rfc/fallback-to-root-scope-deprecation
        if ($parentNode instanceof FuncCall) {
            if ($this->reflector->isFunctionInternal($resolvedName->toString())) {
                return new FullyQualified($resolvedName->toString(), $resolvedName->getAttributes());
            }

            if (false === ($resolvedName instanceof FullyQualified)) {
                return $resolvedName;
            }
        }

        if ('self' === (string) $resolvedName && $parentNode instanceof ClassMethod) {
            return $name;
        }

        return FullyQualifiedFactory::concat(
            $this->prefix,
            $resolvedName->toString(),
            $resolvedName->getAttributes()
        );
    }

    private static function array_starts_with($arr, $prefix): bool
    {
        for ($i = 0; $i < count($prefix); ++$i) {
for ($i=0; $i<count($array); $i++) { // calls count() on each iteration
}

// Better
for ($i=0, $c=count($array); $i<$c; $i++) { // calls count() just once
}
            if ($arr[$i] !== $prefix[$i]) {
                return false;
            }
        }
        return true;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		/*
6		* This file is part of the humbug/php-scoper package.
7		*
8		* Copyright (c) 2017 Théo FIDRY <[email protected]>,
9		* Pádraic Brady <[email protected]>
10		*
11		* For the full copyright and license information, please view the LICENSE
12		* file that was distributed with this source code.
13		*/
14
15		namespace Humbug\PhpScoper\PhpParser\NodeVisitor;
16
17		use Humbug\PhpScoper\PhpParser\Node\FullyQualifiedFactory;
18		use Humbug\PhpScoper\PhpParser\NodeVisitor\NamespaceStmt\NamespaceStmtCollection;
19		use Humbug\PhpScoper\PhpParser\NodeVisitor\Resolver\FullyQualifiedNameResolver;
20		use Humbug\PhpScoper\PhpParser\NodeVisitor\UseStmt\UseStmtCollection;
21		use Humbug\PhpScoper\Reflector;
22		use Humbug\PhpScoper\Whitelist;
23		use PhpParser\Node;
24		use PhpParser\Node\Expr\ArrowFunction;
25		use PhpParser\Node\Expr\ClassConstFetch;
26		use PhpParser\Node\Expr\ConstFetch;
27		use PhpParser\Node\Expr\FuncCall;
28		use PhpParser\Node\Expr\Instanceof_;
29		use PhpParser\Node\Expr\New_;
30		use PhpParser\Node\Expr\StaticCall;
31		use PhpParser\Node\Expr\StaticPropertyFetch;
32		use PhpParser\Node\Name;
33		use PhpParser\Node\Name\FullyQualified;
34		use PhpParser\Node\NullableType;
35		use PhpParser\Node\Param;
36		use PhpParser\Node\Stmt\Catch_;
37		use PhpParser\Node\Stmt\Class_;
38		use PhpParser\Node\Stmt\ClassMethod;
39		use PhpParser\Node\Stmt\Function_;
40		use PhpParser\Node\Stmt\Interface_;
41		use PhpParser\Node\Stmt\Property;
42		use PhpParser\NodeVisitorAbstract;
43		use function count;
44		use function in_array;
45
46		/**
47		* Prefixes names when appropriate.
48		*
49		* ```
50		* new Foo\Bar();
51		* ```.
52		*
53		* =>
54		*
55		* ```
56		* new \Humbug\Foo\Bar();
57		* ```
58		*
59		* @private
60		*/
61		final class NameStmtPrefixer extends NodeVisitorAbstract
62		{
63		public const PHP_FUNCTION_KEYWORDS = [
64		'self',
65		'static',
66		'parent',
67		];
68	549
69		private $prefix;
70		private $whitelist;
71		private $namespaceStatements;
72		private $useStatements;
73		private $nameResolver;
74	549	private $reflector;
75	549
76	549	public function __construct(
77	549	string $prefix,
78		Whitelist $whitelist,
79		NamespaceStmtCollection $namespaceStatements,
80		UseStmtCollection $useStatements,
81		FullyQualifiedNameResolver $nameResolver,
82		Reflector $reflector
83	548	) {
84		$this->prefix = $prefix;
85	548	$this->whitelist = $whitelist;
86	544	$this->namespaceStatements = $namespaceStatements;
87	548	$this->useStatements = $useStatements;
88		$this->nameResolver = $nameResolver;
89		$this->reflector = $reflector;
90		}
91	544
92		/**
93	544	* @inheritdoc
94		*/
95	544	public function enterNode(Node $node): Node
96	4	{
97		return ($node instanceof Name && ParentNodeAppender::hasParent($node))
98		? $this->prefixName($node)
99		: $node
100	4	;
101		}
102
103		private function prefixName(Name $name): Node
104	544	{
105	542	$parentNode = ParentNodeAppender::getParent($name);
106	541
107	540	if ($parentNode instanceof NullableType) {
108	540	if (false === ParentNodeAppender::hasParent($parentNode)) {
109	538	return $name;
110	538	}
111	538
112	538	$parentNode = ParentNodeAppender::getParent($parentNode);
113	538	}
114	538
115	538	if (false === (
116	544	$parentNode instanceof ArrowFunction
117		\|\| $parentNode instanceof Catch_
118		\|\| $parentNode instanceof ConstFetch
119	537	\|\| $parentNode instanceof Class_
120		\|\| $parentNode instanceof ClassConstFetch
121		\|\| $parentNode instanceof ClassMethod
122		\|\| $parentNode instanceof FuncCall
123		\|\| $parentNode instanceof Function_
124	405	\|\| $parentNode instanceof Instanceof_
125	349	\|\| $parentNode instanceof Interface_
126	298	\|\| $parentNode instanceof New_
127	236	\|\| $parentNode instanceof Param
128	185	\|\| $parentNode instanceof Property
129	133	\|\| $parentNode instanceof StaticCall
130	131	\|\| $parentNode instanceof StaticPropertyFetch
131	120	)
132		) {
133	320	return $name;
134		}
135	9
136		if (
137		(
138	403	$parentNode instanceof Catch_
139	4	\|\| $parentNode instanceof ClassConstFetch
140		\|\| $parentNode instanceof New_
141		\|\| $parentNode instanceof FuncCall
142	403	\|\| $parentNode instanceof Instanceof_
143		\|\| $parentNode instanceof Param
144	403	\|\| $parentNode instanceof StaticCall
145		\|\| $parentNode instanceof StaticPropertyFetch
146	403	)
147	403	&& in_array((string) $name, self::PHP_FUNCTION_KEYWORDS, true)
148		) {
149	23	return $name;
150		}
151
152		if ($parentNode instanceof ConstFetch && 'null' === (string) $name) {
153	392	return $name;
154	257	}
155
156	61	$resolvedName = $this->nameResolver->resolveName($name)->getName();
157
158		// Do not prefix if there is a matching use statement.
159	355	$useStatement = $this->useStatements->findStatementForNode($this->namespaceStatements->findNamespaceForNode($name), $name);
160	85	if (
161	21	$useStatement !== null and
162		self::array_starts_with($resolvedName->parts, $useStatement->parts) and
163		!($parentNode instanceof ConstFetch and ($this->whitelist->isGlobalWhitelistedConstant($resolvedName->toString()) or $this->whitelist->isSymbolWhitelisted($resolvedName->toString(), true))) and
164	67	!($useStatement->getAttribute('parent') and $useStatement->getAttribute('parent')->alias !== null and $this->whitelist->isSymbolWhitelisted($useStatement->toString())) and
165	19	!($name instanceof FullyQualified)
166		) {
167		return $name;
168		}
169
170	48	if ($this->prefix === $resolvedName->getFirst() // Skip if is already prefixed
171	8	\|\| $this->whitelist->belongsToWhitelistedNamespace((string) $resolvedName) // Skip if the namespace node is whitelisted
172		) {
173		return $resolvedName;
174	46	}
175
176	11	// Check if the class can be prefixed
177		if (false === ($parentNode instanceof ConstFetch \|\| $parentNode instanceof FuncCall)
178		&& $this->reflector->isClassInternal($resolvedName->toString())
179		) {
180		return $resolvedName;
181		}
182
183		if ($parentNode instanceof ConstFetch) {
184	320	if ($this->whitelist->isSymbolWhitelisted($resolvedName->toString(), true)) {
185	76	return $resolvedName;
186	37	}
187
188		if ($this->reflector->isConstantInternal($resolvedName->toString())) {
189	54	return new FullyQualified($resolvedName->toString(), $resolvedName->getAttributes());
190	9	}
191
192		// Constants have an autoloading fallback so we cannot prefix them when the name is ambiguous
193		// See https://wiki.php.net/rfc/fallback-to-root-scope-deprecation
194	297	if (false === ($resolvedName instanceof FullyQualified)) {
195	3	return $resolvedName;
196		}
197
198	297	if ($this->whitelist->isGlobalWhitelistedConstant((string) $resolvedName)) {
199	297	// Unlike classes & functions, whitelisted are not prefixed with aliases registered in scoper-autoload.php
200	297	return new FullyQualified($resolvedName->toString(), $resolvedName->getAttributes());
201	297	}
202
203		// Continue
204		}
205
206		// Functions have a fallback autoloading so we cannot prefix them when the name is ambiguous
207		// See https://wiki.php.net/rfc/fallback-to-root-scope-deprecation
208		if ($parentNode instanceof FuncCall) {
209		if ($this->reflector->isFunctionInternal($resolvedName->toString())) {
210		return new FullyQualified($resolvedName->toString(), $resolvedName->getAttributes());
211		}
212
213		if (false === ($resolvedName instanceof FullyQualified)) {
214		return $resolvedName;
215		}
216		}
217
218		if ('self' === (string) $resolvedName && $parentNode instanceof ClassMethod) {
219		return $name;
220		}
221
222		return FullyQualifiedFactory::concat(
223		$this->prefix,
224		$resolvedName->toString(),
225		$resolvedName->getAttributes()
226		);
227		}
228
229		private static function array_starts_with($arr, $prefix): bool
230		{
231		for ($i = 0; $i < count($prefix); ++$i) {
		0 ignored issues – show Performance Best Practice introduced 2021-02-25 21:09 UTC by Report Bug Copy Issue Report It seems like you are calling the size function `count()` as part of the test condition. You might want to compute the size beforehand, and not on each iteration. If the size of the collection does not change during the iteration, it is generally a good practice to compute it beforehand, and not on each iteration: for ($i=0; $i<count($array); $i++) { // calls count() on each iteration } // Better for ($i=0, $c=count($array); $i<$c; $i++) { // calls count() just once } Loading history...
232		if ($arr[$i] !== $prefix[$i]) {
233		return false;
234		}
235		}
236		return true;
237		}
238		}
239

humbug / php-scoper

Pull Request — master (#457)

NameStmtPrefixer::prefixName() D

Complexity

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Duplication

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