NameStmtPrefixer::getParent() - Code Metrics - Inspection of "WIP: Tweak NameStmtPrefixer" - humbug/php-scoper - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#580)

by Théo

created 2022-01-20 22:07 UTC

NameStmtPrefixer::getParent() A

↳ Parent: NameStmtPrefixer

Complexity

Conditions	2
Paths	2

Size

Total Lines	13
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	6
CRAP Score	2

Importance

Changes

Metric	Value
cc	2
eloc	4
c	0
b	0
f	0
nc	2
nop	1
dl	0
loc	13
ccs	6
cts	6
cp	1
crap	2
rs	10

<?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\UseStmt\UseStmtCollection;
use Humbug\PhpScoper\PhpParser\UseStmtName;
use Humbug\PhpScoper\Reflector;
use Humbug\PhpScoper\Symbol\EnrichedReflector;
use Humbug\PhpScoper\Whitelist;
use PhpParser\Node;
use PhpParser\Node\Expr\ArrowFunction;
use PhpParser\Node\Expr\ClassConstFetch;
use PhpParser\Node\Expr\Closure;
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\Node\Stmt\TraitUse;
use PhpParser\Node\Stmt\TraitUseAdaptation\Alias;
use PhpParser\Node\Stmt\TraitUseAdaptation\Precedence;
use PhpParser\Node\Stmt\Use_;
use PhpParser\Node\Stmt\UseUse;
use PhpParser\NodeVisitorAbstract;
use UnexpectedValueException;
use function count;
use function get_class;
use function in_array;
use function Safe\sprintf;
use function strtolower;

/**
 * Prefixes names when appropriate.
 *
 * ```
 * new Foo\Bar();
 * ```.
 *
 * =>
 *
 * ```
 * new \Humbug\Foo\Bar();
 * ```
 *
 * @private
 */
final class NameStmtPrefixer extends NodeVisitorAbstract
{
    private const SUPPORTED_PARENT_NODE_CLASS_NAMES = [
        Alias::class,
        ArrowFunction::class,
        Catch_::class,
        ConstFetch::class,
        Class_::class,
        ClassConstFetch::class,
        ClassMethod::class,
        Closure::class,
        FuncCall::class,
        Function_::class,
        Instanceof_::class,
        Interface_::class,
        New_::class,
        Param::class,
        Precedence::class,
        Property::class,
        StaticCall::class,
        StaticPropertyFetch::class,
        TraitUse::class,
    ];

    private string $prefix;
    private Whitelist $whitelist;
    private NamespaceStmtCollection $namespaceStatements;
    private UseStmtCollection $useStatements;
    private Reflector $reflector;
    private EnrichedReflector $enrichedReflector;

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

    public function enterNode(Node $node): Node
    {
        if (!($node instanceof Name)) {
            return $node;
        }

        return $this->prefixName(
            $node,
            self::getParent($node),
        );
    }

    private static function getParent(Node $name): Node
    {
        $parent = ParentNodeAppender::getParent($name);

        // The parent can be a nullable type. For example for "public ?Foo $x"
        // the parent of Name("Foo") will be NullableType.
        // In practice, we do not get any information from NullableType to
        // determine if we can prefix or not our name hence we skip it completely
        if (!($parent instanceof NullableType)) {
            return $parent;
        }

        return self::getParent($parent);
    }

    private function prefixName(Name $resolvedName, Node $parentNode): Node
    {
        if ($resolvedName->isSpecialClassName()
            || !self::isParentNodeSupported($parentNode)
        ) {
            return $resolvedName;
        }

        $originalName = OriginalNameResolver::getOriginalName($resolvedName);

        // Happens when assigning `null` as a default value for example
        if ($parentNode instanceof ConstFetch
            && 'null' === $originalName->toLowerString()
        ) {
            return $originalName;
        }

        $useStatement = $this->useStatements->findStatementForNode(
            $this->namespaceStatements->findNamespaceForNode($resolvedName),
            $resolvedName,
        );

        if ($this->doesNameHasUseStatement(
                $originalName,
                $resolvedName,
                $parentNode,
                $useStatement,
            )
        ) {
            // Do not prefix if there is a matching use statement.
            return $originalName;
        }

        if ($this->isNamePrefixable($resolvedName)) {
            return $resolvedName;
        }

        // Do not prefix if the Name is inside the current namespace
        $currentNamespace = $this->namespaceStatements->getCurrentNamespaceName();

        if (self::doesNameBelongToNamespace(
                $originalName,
                $resolvedName,
                $currentNamespace,
            )
            // At this point if the name belongs to the global namespace, since
            // we are NOT in an excluded namespace, the current namespace will
            // become prefixed hence there is no need for prefixing.
            // This is however not true for exposed constants as the constants
            // cannot be aliases – they are transformed to keep their original
            // FQ name. In other words, they cannot remain untouched/non-FQ
            || $this->doesNameBelongToGlobalNamespace(
                $originalName,
                $resolvedName->toString(),
                $parentNode,
                $currentNamespace,
            )
        ) {
            return $originalName;
        }

        if (!$this->isPrefixableClassName($resolvedName, $parentNode)) {
            return $resolvedName;
        }

        if ($parentNode instanceof ConstFetch) {
            $prefixedName = $this->prefixConstFetchNode($resolvedName);

            if (null !== $prefixedName) {
                return $prefixedName;
            }

            // Continue
        }

        if ($parentNode instanceof FuncCall) {
            $prefixedName = $this->prefixFuncCallNode($originalName, $resolvedName);

            if (null !== $prefixedName) {
                return $prefixedName;
            }

            // Continue
        }

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

    private static function isParentNodeSupported(Node $parentNode): bool
    {
        foreach (self::SUPPORTED_PARENT_NODE_CLASS_NAMES as $supportedClassName) {
            if ($parentNode instanceof $supportedClassName) {
                return true;
            }
        }

        return false;
    }

    private function isNamePrefixable(Name $resolvedName): bool
    {
        if (!$resolvedName->isFullyQualified()) {
            return false;
        }

        $isAlreadyPrefixed = $this->prefix === $resolvedName->getFirst();

        return (
            $isAlreadyPrefixed
            || $this->enrichedReflector->belongsToExcludedNamespace((string) $resolvedName)
        );
    }

    private static function doesNameBelongToNamespace(
        Name $originalName,
        Name $resolvedName,
        ?Name $namespaceName
    ): bool {
        if (
            $namespaceName === null
            || !$resolvedName->isFullyQualified()
            // In case the original name is a FQ, we do not skip the prefixing
            // and keep it as FQ
            || $originalName->isFullyQualified()
        ) {
            return false;
        }

        $originalNameFQParts = [
            ...$namespaceName->parts,
            ...$originalName->parts,
        ];

        return $originalNameFQParts === $resolvedName->parts;
    }

    private function doesNameBelongToGlobalNamespace(
        Name $originalName,
        string $resolvedName,
        Node $parentNode,
        ?Name $namespaceName
    ): bool {
        return null === $namespaceName
            && !$originalName->isFullyQualified()

            // See caller as to why we cannot allow constants to keep their
            // original non FQ names
            && !($parentNode instanceof ConstFetch)

            // If exposed we cannot keep the original non-FQCN UNLESS belongs
            // to the global namespace for the reasons mentionned in the caller
            && (!$this->enrichedReflector->isExposedClass($resolvedName)
                || $this->enrichedReflector->isExposedClassFromGlobalNamespace($resolvedName)
            )
            // If excluded we cannot keep the non-FQCN
            && !$this->enrichedReflector->isClassExcluded($resolvedName)

            && (!$this->enrichedReflector->isExposedFunction($resolvedName)
                || $this->enrichedReflector->isExposedFunctionFromGlobalNamespace($resolvedName)
            )
            && !$this->enrichedReflector->isFunctionExcluded($resolvedName);
    }

    private function doesNameHasUseStatement(
        Name $originalName,
        Name $resolvedName,
        Node $parentNode,
        ?Name $useStatementName
    ): bool {
        if (null === $useStatementName
            || !$resolvedName->isFullyQualified()
            // In case the original name is a FQ, we do not skip the prefixing
            // and keep it as FQ
            || $originalName->isFullyQualified()
            // TODO: review Isolated Finder support
            || $resolvedName->parts === ['Isolated', 'Symfony', 'Component', 'Finder', 'Finder']
        ) {
            return false;
        }

        $useStmt = new UseStmtName($useStatementName);

        if (!$useStmt->contains($resolvedName)) {
            return false;
        }

        [$useStmtAlias, $useStmtType] = $useStmt->getUseStmtAliasAndType();

        if ($parentNode instanceof ConstFetch) {
            $isExposedConstant = $this->enrichedReflector->isExposedConstant($resolvedName->toString());

            // If a constant is exposed, it can be that letting a non FQ breaks
            // things. For example the exposed namespaced constant could be
            // used via a partial import (in which case it is a regular import not
            // a constant one) which may not be prefixed.
            return ($isExposedConstant && Use_::TYPE_CONSTANT === $useStmtType)
                || !$isExposedConstant;
        }

        if (null === $useStmtAlias) {
            return true;
        }

        // Classes and namespaces usages are case-insensitive
        $caseSensitiveUseStmt = !in_array(
            $useStmtType,
            [Use_::TYPE_UNKNOWN, Use_::TYPE_NORMAL],
            true,
        );

        return $caseSensitiveUseStmt
            ? $originalName->getFirst() === $useStmtAlias
            : strtolower($originalName->getFirst()) === strtolower($useStmtAlias);
    }

    private function isPrefixableClassName(
        Name $resolvedName,
        Node $parentNode
    ): bool
    {
        $isClassNode = $parentNode instanceof ConstFetch || $parentNode instanceof FuncCall;

        return (
            $isClassNode
            || !$resolvedName->isFullyQualified()
            || !$this->enrichedReflector->isClassExcluded($resolvedName->toString())
        );
    }

    /**
     * @return Name|null Returns the name to use (prefixed or not). Otherwise
     *                   it was not possible to resolve the name and the name
     *                   will end up being prefixed the "regular" way (prefix
     *                   added)
     */
    private function prefixConstFetchNode(Name $resolvedName): ?Name
    {
        $resolvedNameString = $resolvedName->toString();

        if ($resolvedName->isFullyQualified()) {
            return $this->enrichedReflector->isExposedConstant($resolvedNameString)
                ? $resolvedName
                : null;
        }

        // Constants have an auto-loading fallback, so as a rule we cannot
        // prefix them when the name is ambiguous.
        // See https://wiki.php.net/rfc/fallback-to-root-scope-deprecation
        //
        // HOWEVER. However. There is _very_ high chances that if a user
        // explicitly register a constant to be exposed or that the constant
        // is internal that it is the constant in question and not the one
        // relative to the namespace.
        // Indeed it would otherwise mean that the user has for example Acme\FOO
        // and \FOO in the codebase AND decide to expose \FOO.
        // It is not only unlikely but sketchy, hence should not be an issue
        // in practice.

        // We distinguish exposed from internal here as internal are a much safer
        // bet.
        if ($this->enrichedReflector->isConstantInternal($resolvedNameString)) {
            return new FullyQualified(
                $resolvedNameString,
                $resolvedName->getAttributes(),
            );
        }

        if ($this->enrichedReflector->isExposedConstant($resolvedNameString)) {
            return $this->whitelist->isExposedConstantFromGlobalNamespace($resolvedNameString)
                ? $resolvedName
                : new FullyQualified(
                    $resolvedNameString,
                    $resolvedName->getAttributes(),
                );
        }

        return $resolvedName;
    }

    /**
     * @return Name|null Returns the name to use (prefixed or not). Otherwise
     *                   it was not possible to resolve the name and the name
     *                   will end up being prefixed the "regular" way (prefix
     *                   added)
     */
    private function prefixFuncCallNode(Name $originalName, Name $resolvedName): ?Name
    {
        // TODO: similar to const
        // Functions have a fallback auto-loading so we cannot prefix them when
        // the name is ambiguous
        // See https://wiki.php.net/rfc/fallback-to-root-scope-deprecation

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

        if (!$resolvedName->isFullyQualified()) {
            return $resolvedName;
        }

        return null;
    }

    /**
     * @return array{string|null, Use_::TYPE_*}

     */
    private static function getUseStmtAliasAndType(Name $name): array
    {
        $use = ParentNodeAppender::getParent($name);

        if (!($use instanceof UseUse)) {
            throw new UnexpectedValueException(
                sprintf(
                    'Unexpected use statement name parent "%s"',
                    get_class($use),
                ),
            );
        }

        $useParent = ParentNodeAppender::getParent($use);

        if (!($useParent instanceof Use_)) {
            throw new UnexpectedValueException(
                sprintf(
                    'Unexpected UseUse parent "%s"',
                    get_class($useParent),
                ),
            );
        }

        $alias = $use->alias;

        if (null !== $alias) {
            $alias = (string) $alias;
        }

        return [
            $alias,
            $useParent->type,
        ];
    }
}


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\UseStmt\UseStmtCollection;
20		use Humbug\PhpScoper\PhpParser\UseStmtName;
21		use Humbug\PhpScoper\Reflector;
22		use Humbug\PhpScoper\Symbol\EnrichedReflector;
23		use Humbug\PhpScoper\Whitelist;
24		use PhpParser\Node;
25		use PhpParser\Node\Expr\ArrowFunction;
26		use PhpParser\Node\Expr\ClassConstFetch;
27		use PhpParser\Node\Expr\Closure;
28		use PhpParser\Node\Expr\ConstFetch;
29		use PhpParser\Node\Expr\FuncCall;
30		use PhpParser\Node\Expr\Instanceof_;
31		use PhpParser\Node\Expr\New_;
32		use PhpParser\Node\Expr\StaticCall;
33		use PhpParser\Node\Expr\StaticPropertyFetch;
34		use PhpParser\Node\Name;
35		use PhpParser\Node\Name\FullyQualified;
36		use PhpParser\Node\NullableType;
37		use PhpParser\Node\Param;
38		use PhpParser\Node\Stmt\Catch_;
39		use PhpParser\Node\Stmt\Class_;
40		use PhpParser\Node\Stmt\ClassMethod;
41		use PhpParser\Node\Stmt\Function_;
42		use PhpParser\Node\Stmt\Interface_;
43		use PhpParser\Node\Stmt\Property;
44		use PhpParser\Node\Stmt\TraitUse;
45		use PhpParser\Node\Stmt\TraitUseAdaptation\Alias;
46		use PhpParser\Node\Stmt\TraitUseAdaptation\Precedence;
47		use PhpParser\Node\Stmt\Use_;
48		use PhpParser\Node\Stmt\UseUse;
49		use PhpParser\NodeVisitorAbstract;
50		use UnexpectedValueException;
51		use function count;
52		use function get_class;
53		use function in_array;
54		use function Safe\sprintf;
55		use function strtolower;
56
57		/**
58		* Prefixes names when appropriate.
59		*
60		* ```
61		* new Foo\Bar();
62		* ```.
63		*
64		* =>
65		*
66		* ```
67		* new \Humbug\Foo\Bar();
68	549	* ```
69		*
70		* @private
71		*/
72		final class NameStmtPrefixer extends NodeVisitorAbstract
73		{
74	549	private const SUPPORTED_PARENT_NODE_CLASS_NAMES = [
75	549	Alias::class,
76	549	ArrowFunction::class,
77	549	Catch_::class,
78		ConstFetch::class,
79		Class_::class,
80		ClassConstFetch::class,
81		ClassMethod::class,
82		Closure::class,
83	548	FuncCall::class,
84		Function_::class,
85	548	Instanceof_::class,
86	544	Interface_::class,
87	548	New_::class,
88		Param::class,
89		Precedence::class,
90		Property::class,
91	544	StaticCall::class,
92		StaticPropertyFetch::class,
93	544	TraitUse::class,
94		];
95	544
96	4	private string $prefix;
97		private Whitelist $whitelist;
98		private NamespaceStmtCollection $namespaceStatements;
99		private UseStmtCollection $useStatements;
100	4	private Reflector $reflector;
101		private EnrichedReflector $enrichedReflector;
102
103		public function __construct(
104	544	string $prefix,
105	542	Whitelist $whitelist,
106	541	NamespaceStmtCollection $namespaceStatements,
107	540	UseStmtCollection $useStatements,
108	540	Reflector $reflector,
109	538	EnrichedReflector $enrichedReflector
110	538	) {
111	538	$this->prefix = $prefix;
112	538	$this->whitelist = $whitelist;
113	538	$this->namespaceStatements = $namespaceStatements;
114	538	$this->useStatements = $useStatements;
115	538	$this->reflector = $reflector;
116	544	$this->enrichedReflector = $enrichedReflector;
117		}
118
119	537	public function enterNode(Node $node): Node
120		{
121		if (!($node instanceof Name)) {
122		return $node;
123		}
124	405
125	349	return $this->prefixName(
126	298	$node,
127	236	self::getParent($node),
128	185	);
129	133	}
130	131
131	120	private static function getParent(Node $name): Node
132		{
133	320	$parent = ParentNodeAppender::getParent($name);
134
135	9	// The parent can be a nullable type. For example for "public ?Foo $x"
136		// the parent of Name("Foo") will be NullableType.
137		// In practice, we do not get any information from NullableType to
138	403	// determine if we can prefix or not our name hence we skip it completely
139	4	if (!($parent instanceof NullableType)) {
140		return $parent;
141		}
142	403
143		return self::getParent($parent);
144	403	}
145
146	403	private function prefixName(Name $resolvedName, Node $parentNode): Node
147	403	{
148		if ($resolvedName->isSpecialClassName()
149	23	\|\| !self::isParentNodeSupported($parentNode)
150		) {
151		return $resolvedName;
152		}
153	392
154	257	$originalName = OriginalNameResolver::getOriginalName($resolvedName);
155
156	61	// Happens when assigning `null` as a default value for example
157		if ($parentNode instanceof ConstFetch
158		&& 'null' === $originalName->toLowerString()
159	355	) {
160	85	return $originalName;
161	21	}
162
163		$useStatement = $this->useStatements->findStatementForNode(
164	67	$this->namespaceStatements->findNamespaceForNode($resolvedName),
165	19	$resolvedName,
166		);
167
168		if ($this->doesNameHasUseStatement(
169		$originalName,
170	48	$resolvedName,
171	8	$parentNode,
172		$useStatement,
173		)
174	46	) {
175		// Do not prefix if there is a matching use statement.
176	11	return $originalName;
177		}
178
179		if ($this->isNamePrefixable($resolvedName)) {
180		return $resolvedName;
181		}
182
183		// Do not prefix if the Name is inside the current namespace
184	320	$currentNamespace = $this->namespaceStatements->getCurrentNamespaceName();
185	76
186	37	if (self::doesNameBelongToNamespace(
187		$originalName,
188		$resolvedName,
189	54	$currentNamespace,
190	9	)
191		// At this point if the name belongs to the global namespace, since
192		// we are NOT in an excluded namespace, the current namespace will
193		// become prefixed hence there is no need for prefixing.
194	297	// This is however not true for exposed constants as the constants
195	3	// cannot be aliases – they are transformed to keep their original
196		// FQ name. In other words, they cannot remain untouched/non-FQ
197		\|\| $this->doesNameBelongToGlobalNamespace(
198	297	$originalName,
199	297	$resolvedName->toString(),
200	297	$parentNode,
201	297	$currentNamespace,
202		)
203		) {
204		return $originalName;
205		}
206
207		if (!$this->isPrefixableClassName($resolvedName, $parentNode)) {
208		return $resolvedName;
209		}
210
211		if ($parentNode instanceof ConstFetch) {
212		$prefixedName = $this->prefixConstFetchNode($resolvedName);
213
214		if (null !== $prefixedName) {
215		return $prefixedName;
216		}
217
218		// Continue
219		}
220
221		if ($parentNode instanceof FuncCall) {
222		$prefixedName = $this->prefixFuncCallNode($originalName, $resolvedName);
223
224		if (null !== $prefixedName) {
225		return $prefixedName;
226		}
227
228		// Continue
229		}
230
231		return FullyQualifiedFactory::concat(
232		$this->prefix,
233		$resolvedName->toString(),
234		$resolvedName->getAttributes(),
235		);
236		}
237
238		private static function isParentNodeSupported(Node $parentNode): bool
239		{
240		foreach (self::SUPPORTED_PARENT_NODE_CLASS_NAMES as $supportedClassName) {
241		if ($parentNode instanceof $supportedClassName) {
242		return true;
243		}
244		}
245
246		return false;
247		}
248
249		private function isNamePrefixable(Name $resolvedName): bool
250		{
251		if (!$resolvedName->isFullyQualified()) {
252		return false;
253		}
254
255		$isAlreadyPrefixed = $this->prefix === $resolvedName->getFirst();
256
257		return (
258		$isAlreadyPrefixed
259		\|\| $this->enrichedReflector->belongsToExcludedNamespace((string) $resolvedName)
260		);
261		}
262
263		private static function doesNameBelongToNamespace(
264		Name $originalName,
265		Name $resolvedName,
266		?Name $namespaceName
267		): bool {
268		if (
269		$namespaceName === null
270		\|\| !$resolvedName->isFullyQualified()
271		// In case the original name is a FQ, we do not skip the prefixing
272		// and keep it as FQ
273		\|\| $originalName->isFullyQualified()
274		) {
275		return false;
276		}
277
278		$originalNameFQParts = [
279		...$namespaceName->parts,
280		...$originalName->parts,
281		];
282
283		return $originalNameFQParts === $resolvedName->parts;
284		}
285
286		private function doesNameBelongToGlobalNamespace(
287		Name $originalName,
288		string $resolvedName,
289		Node $parentNode,
290		?Name $namespaceName
291		): bool {
292		return null === $namespaceName
293		&& !$originalName->isFullyQualified()
294
295		// See caller as to why we cannot allow constants to keep their
296		// original non FQ names
297		&& !($parentNode instanceof ConstFetch)
298
299		// If exposed we cannot keep the original non-FQCN UNLESS belongs
300		// to the global namespace for the reasons mentionned in the caller
301		&& (!$this->enrichedReflector->isExposedClass($resolvedName)
302		\|\| $this->enrichedReflector->isExposedClassFromGlobalNamespace($resolvedName)
303		)
304		// If excluded we cannot keep the non-FQCN
305		&& !$this->enrichedReflector->isClassExcluded($resolvedName)
306
307		&& (!$this->enrichedReflector->isExposedFunction($resolvedName)
308		\|\| $this->enrichedReflector->isExposedFunctionFromGlobalNamespace($resolvedName)
309		)
310		&& !$this->enrichedReflector->isFunctionExcluded($resolvedName);
311		}
312
313		private function doesNameHasUseStatement(
314		Name $originalName,
315		Name $resolvedName,
316		Node $parentNode,
317		?Name $useStatementName
318		): bool {
319		if (null === $useStatementName
320		\|\| !$resolvedName->isFullyQualified()
321		// In case the original name is a FQ, we do not skip the prefixing
322		// and keep it as FQ
323		\|\| $originalName->isFullyQualified()
324		// TODO: review Isolated Finder support
325		\|\| $resolvedName->parts === ['Isolated', 'Symfony', 'Component', 'Finder', 'Finder']
326		) {
327		return false;
328		}
329
330		$useStmt = new UseStmtName($useStatementName);
331
332		if (!$useStmt->contains($resolvedName)) {
333		return false;
334		}
335
336		[$useStmtAlias, $useStmtType] = $useStmt->getUseStmtAliasAndType();
337
338		if ($parentNode instanceof ConstFetch) {
339		$isExposedConstant = $this->enrichedReflector->isExposedConstant($resolvedName->toString());
340
341		// If a constant is exposed, it can be that letting a non FQ breaks
342		// things. For example the exposed namespaced constant could be
343		// used via a partial import (in which case it is a regular import not
344		// a constant one) which may not be prefixed.
345		return ($isExposedConstant && Use_::TYPE_CONSTANT === $useStmtType)
346		\|\| !$isExposedConstant;
347		}
348
349		if (null === $useStmtAlias) {
350		return true;
351		}
352
353		// Classes and namespaces usages are case-insensitive
354		$caseSensitiveUseStmt = !in_array(
355		$useStmtType,
356		[Use_::TYPE_UNKNOWN, Use_::TYPE_NORMAL],
357		true,
358		);
359
360		return $caseSensitiveUseStmt
361		? $originalName->getFirst() === $useStmtAlias
362		: strtolower($originalName->getFirst()) === strtolower($useStmtAlias);
363		}
364
365		private function isPrefixableClassName(
366		Name $resolvedName,
367		Node $parentNode
368		): bool
369		{
370		$isClassNode = $parentNode instanceof ConstFetch \|\| $parentNode instanceof FuncCall;
371
372		return (
373		$isClassNode
374		\|\| !$resolvedName->isFullyQualified()
375		\|\| !$this->enrichedReflector->isClassExcluded($resolvedName->toString())
376		);
377		}
378
379		/**
380		* @return Name\|null Returns the name to use (prefixed or not). Otherwise
381		* it was not possible to resolve the name and the name
382		* will end up being prefixed the "regular" way (prefix
383		* added)
384		*/
385		private function prefixConstFetchNode(Name $resolvedName): ?Name
386		{
387		$resolvedNameString = $resolvedName->toString();
388
389		if ($resolvedName->isFullyQualified()) {
390		return $this->enrichedReflector->isExposedConstant($resolvedNameString)
391		? $resolvedName
392		: null;
393		}
394
395		// Constants have an auto-loading fallback, so as a rule we cannot
396		// prefix them when the name is ambiguous.
397		// See https://wiki.php.net/rfc/fallback-to-root-scope-deprecation
398		//
399		// HOWEVER. However. There is _very_ high chances that if a user
400		// explicitly register a constant to be exposed or that the constant
401		// is internal that it is the constant in question and not the one
402		// relative to the namespace.
403		// Indeed it would otherwise mean that the user has for example Acme\FOO
404		// and \FOO in the codebase AND decide to expose \FOO.
405		// It is not only unlikely but sketchy, hence should not be an issue
406		// in practice.
407
408		// We distinguish exposed from internal here as internal are a much safer
409		// bet.
410		if ($this->enrichedReflector->isConstantInternal($resolvedNameString)) {
411		return new FullyQualified(
412		$resolvedNameString,
413		$resolvedName->getAttributes(),
414		);
415		}
416
417		if ($this->enrichedReflector->isExposedConstant($resolvedNameString)) {
418		return $this->whitelist->isExposedConstantFromGlobalNamespace($resolvedNameString)
419		? $resolvedName
420		: new FullyQualified(
421		$resolvedNameString,
422		$resolvedName->getAttributes(),
423		);
424		}
425
426		return $resolvedName;
427		}
428
429		/**
430		* @return Name\|null Returns the name to use (prefixed or not). Otherwise
431		* it was not possible to resolve the name and the name
432		* will end up being prefixed the "regular" way (prefix
433		* added)
434		*/
435		private function prefixFuncCallNode(Name $originalName, Name $resolvedName): ?Name
436		{
437		// TODO: similar to const
438		// Functions have a fallback auto-loading so we cannot prefix them when
439		// the name is ambiguous
440		// See https://wiki.php.net/rfc/fallback-to-root-scope-deprecation
441
442		if ($this->reflector->isFunctionInternal($originalName->toString())) {
443		return new FullyQualified(
444		$originalName->toString(),
445		$originalName->getAttributes(),
446		);
447		}
448
449		if (!$resolvedName->isFullyQualified()) {
450		return $resolvedName;
451		}
452
453		return null;
454		}
455
456		/**
457		* @return array{string\|null, Use_::TYPE_*}
		0 ignored issues – show Documentation Bug introduced 2021-06-16 07:10 UTC by Report Bug Copy Issue Report The doc comment `array{string\|null, Use_::TYPE_*}` at position `2` could not be parsed: Expected ':' at position 2, but found 'string'. Loading history...
458		*/
459		private static function getUseStmtAliasAndType(Name $name): array
460		{
461		$use = ParentNodeAppender::getParent($name);
462
463		if (!($use instanceof UseUse)) {
464		throw new UnexpectedValueException(
465		sprintf(
466		'Unexpected use statement name parent "%s"',
467		get_class($use),
468		),
469		);
470		}
471
472		$useParent = ParentNodeAppender::getParent($use);
473
474		if (!($useParent instanceof Use_)) {
475		throw new UnexpectedValueException(
476		sprintf(
477		'Unexpected UseUse parent "%s"',
478		get_class($useParent),
479		),
480		);
481		}
482
483		$alias = $use->alias;
484
485		if (null !== $alias) {
486		$alias = (string) $alias;
487		}
488
489		return [
490		$alias,
491		$useParent->type,
492		];
493		}
494		}
495

humbug / php-scoper

Pull Request — master (#580)

NameStmtPrefixer::getParent() A

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