ReflectionFile::locateDeclarations() - Code Metrics - Inspection of "[Core] Add `provide` section (#901)" - spiral/framework - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Push — master ( 33b36c...5d5b62 )

by butschster

created 2023-03-24 07:20 UTC

ReflectionFile::locateDeclarations() D

↳ Parent: ReflectionFile

Complexity

Conditions	18
Paths	52

Size

Total Lines	54
Code Lines	33

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	29
CRAP Score	18.0119

Importance

Changes

Metric	Value
eloc	33
dl	0
loc	54
ccs	29
cts	30
cp	0.9667
rs	4.8666
c	0
b	0
f	0
cc	18
nc	52
nop	0
crap	18.0119

How to fix Long Method Complexity

<?php

declare(strict_types=1);

namespace Spiral\Tokenizer\Reflection;

use Spiral\Tokenizer\Tokenizer;

/**
 * File reflections can fetch information about classes, interfaces, functions and traits declared
 * in file. In addition file reflection provides ability to fetch and describe every method/function
 * call.
 */
final class ReflectionFile
{
    /**
     * Namespace separator.
     */
    public const NS_SEPARATOR = '\\';

    /**
     * Constants for convenience.
     */
    public const TOKEN_TYPE = Tokenizer::TYPE;
    public const TOKEN_CODE = Tokenizer::CODE;
    public const TOKEN_LINE = Tokenizer::LINE;

    /**
     * Opening and closing token ids.
     */
    public const O_TOKEN = 0;
    public const C_TOKEN = 1;

    /**
     * Namespace uses.
     */
    public const N_USES = 2;

    /**
     * Set of tokens required to detect classes, traits, interfaces and function declarations. We
     * don't need any other token for that.
     */
    private static array $processTokens = [
        '{',
        '}',
        ';',
        T_PAAMAYIM_NEKUDOTAYIM,
        T_NAMESPACE,
        T_STRING,
        T_CLASS,
        T_INTERFACE,
        T_TRAIT,
        T_ENUM,
        T_FUNCTION,
        T_NS_SEPARATOR,
        T_INCLUDE,
        T_INCLUDE_ONCE,
        T_REQUIRE,
        T_REQUIRE_ONCE,
        T_USE,
        T_AS,
    ];

    /**
     * Parsed tokens array.
     *
     * @internal
     */
    private array $tokens = [];

    /**
     * Total tokens count.
     *
     * @internal
     */
    private int $countTokens = 0;

    /**
     * Indicator that file has external includes.
     *
     * @internal
     */
    private bool $hasIncludes = false;

    /**
     * Namespaces used in file and their token positions.
     *
     * @internal
     */
    private array $namespaces = [];

    /**
     * Declarations of classes, interfaces and traits.
     *
     * @internal
     */
    private array $declarations = [];

    /**
     * Declarations of new functions.
     *
     * @internal
     */
    private array $functions = [];

    /**
     * Every found method/function invocation.
     *
     * @internal
     * @var ReflectionInvocation[]
     */
    private array $invocations = [];

    public function __construct(
        private readonly string $filename
    ) {
        $this->tokens = Tokenizer::getTokens($filename);
        $this->countTokens = \count($this->tokens);

        //Looking for declarations
        $this->locateDeclarations();
    }

    /**
     * Filename.
     */
    public function getFilename(): string
    {
        return $this->filename;
    }

    /**
     * List of declared function names
     */
    public function getFunctions(): array
    {
        return \array_keys($this->functions);
    }

    /**
     * List of declared class names
     */
    public function getClasses(): array
    {
        if (!isset($this->declarations['T_CLASS'])) {
            return [];
        }

        return \array_keys($this->declarations['T_CLASS']);
    }

    /**
     * List of declared enums names
     */
    public function getEnums(): array
    {
        if (!isset($this->declarations['T_ENUM'])) {
            return [];
        }

        return \array_keys($this->declarations['T_ENUM']);
    }

    /**
     * List of declared trait names
     */
    public function getTraits(): array
    {
        if (!isset($this->declarations['T_TRAIT'])) {
            return [];
        }

        return \array_keys($this->declarations['T_TRAIT']);
    }

    /**
     * List of declared interface names
     */
    public function getInterfaces(): array
    {
        if (!isset($this->declarations['T_INTERFACE'])) {
            return [];
        }

        return \array_keys($this->declarations['T_INTERFACE']);
    }

    /**
     * Get list of tokens associated with given file.
     */
    public function getTokens(): array
    {
        return $this->tokens;
    }

    /**
     * Indication that file contains require/include statements
     */
    public function hasIncludes(): bool
    {
        return $this->hasIncludes;
    }

    /**
     * Locate and return list of every method or function call in specified file. Only static and
     * $this calls will be indexed
     *
     * @return ReflectionInvocation[]
     */
    public function getInvocations(): array
    {
        if (empty($this->invocations)) {
            $this->locateInvocations($this->getTokens());
        }

        return $this->invocations;
    }

    /**
     * Export found declaration as array for caching purposes.
     */
    public function exportSchema(): array
    {
        return [$this->hasIncludes, $this->declarations, $this->functions, $this->namespaces];
    }

    /**
     * Import cached reflection schema.
     */
    protected function importSchema(array $cache)
    {
        [$this->hasIncludes, $this->declarations, $this->functions, $this->namespaces] = $cache;
    }

    /**
     * Locate every class, interface, trait or function definition.
     */
    protected function locateDeclarations()
    {
        foreach ($this->getTokens() as $tokenID => $token) {
            if (!\in_array($token[self::TOKEN_TYPE], self::$processTokens)) {
                continue;
            }

            switch ($token[self::TOKEN_TYPE]) {
                case T_NAMESPACE:
                    $this->registerNamespace($tokenID);
                    break;

                case T_USE:
                    $this->registerUse($tokenID);
                    break;

                case T_FUNCTION:
                    $this->registerFunction($tokenID);
                    break;

                case T_CLASS:
                case T_TRAIT:
                case T_INTERFACE:
                case T_ENUM:
                    if ($this->isClassNameConst($tokenID)) {
                        // PHP5.5 ClassName::class constant
                        continue 2;
                    }

                    if ($this->isAnonymousClass($tokenID)) {
                        // PHP7.0 Anonymous classes new class ('foo', 'bar')
                        continue 2;
                    }

                    if (!$this->isCorrectDeclaration($tokenID)) {
                        // PHP8.0 Named parameters ->foo(class: 'bar')
                        continue 2;
                    }

                    $this->registerDeclaration($tokenID, $token[self::TOKEN_TYPE]);
                    break;

                case T_INCLUDE:
                case T_INCLUDE_ONCE:
                case T_REQUIRE:
                case T_REQUIRE_ONCE:
                    $this->hasIncludes = true;
            }
        }

        //Dropping empty namespace
        if (isset($this->namespaces[''])) {
            $this->namespaces['\\'] = $this->namespaces[''];
            unset($this->namespaces['']);
        }
    }

    /**
     * Handle namespace declaration.
     */
    private function registerNamespace(int $tokenID): void
    {
        $namespace = '';
        $localID = $tokenID + 1;

        do {
            $token = $this->tokens[$localID++];
            if ($token[self::TOKEN_CODE] === '{') {
                break;
            }

            $namespace .= $token[self::TOKEN_CODE];
        } while (
            isset($this->tokens[$localID])
            && $this->tokens[$localID][self::TOKEN_CODE] !== '{'
            && $this->tokens[$localID][self::TOKEN_CODE] !== ';'
        );

        //Whitespaces
        $namespace = \trim($namespace);

        $uses = [];
        if (isset($this->namespaces[$namespace])) {
            $uses = $this->namespaces[$namespace];
        }

        if ($this->tokens[$localID][self::TOKEN_CODE] === ';') {
            $endingID = \count($this->tokens) - 1;
        } else {
            $endingID = $this->endingToken($tokenID);
        }

        $this->namespaces[$namespace] = [
            self::O_TOKEN => $tokenID,
            self::C_TOKEN => $endingID,
            self::N_USES  => $uses,
        ];
    }

    /**
     * Handle use (import class from another namespace).
     */
    private function registerUse(int $tokenID): void
    {
        $namespace = \rtrim($this->activeNamespace($tokenID), '\\');

        $class = '';
        $localAlias = null;
        for ($localID = $tokenID + 1; $this->tokens[$localID][self::TOKEN_CODE] !== ';'; ++$localID) {
            if ($this->tokens[$localID][self::TOKEN_TYPE] == T_AS) {
                $localAlias = '';
                continue;
            }

            if ($localAlias === null) {
                $class .= $this->tokens[$localID][self::TOKEN_CODE];
            } else {
                $localAlias .= $this->tokens[$localID][self::TOKEN_CODE];
            }
        }

        if (empty($localAlias)) {
            $names = explode('\\', $class);
            $localAlias = end($names);
        }

        $this->namespaces[$namespace][self::N_USES][\trim($localAlias)] = \trim($class);
    }

    /**
     * Handle function declaration (function creation).
     */
    private function registerFunction(int $tokenID): void
    {
        foreach ($this->declarations as $declarations) {
            foreach ($declarations as $location) {
                if ($tokenID >= $location[self::O_TOKEN] && $tokenID <= $location[self::C_TOKEN]) {
                    //We are inside class, function is method
                    return;
                }
            }
        }

        $localID = $tokenID + 1;
        while ($this->tokens[$localID][self::TOKEN_TYPE] !== T_STRING) {
            //Fetching function name
            ++$localID;
        }

        $name = $this->tokens[$localID][self::TOKEN_CODE];
        if (!empty($namespace = $this->activeNamespace($tokenID))) {
            $name = $namespace . self::NS_SEPARATOR . $name;
        }

        $this->functions[$name] = [
            self::O_TOKEN => $tokenID,
            self::C_TOKEN => $this->endingToken($tokenID),
        ];
    }

    /**
     * Handle declaration of class, trait of interface. Declaration will be stored under it's token
     * type in declarations array.
     */
    private function registerDeclaration(int $tokenID, int $tokenType): void
    {
        $localID = $tokenID + 1;
        while ($this->tokens[$localID][self::TOKEN_TYPE] !== T_STRING) {
            ++$localID;
        }

        $name = $this->tokens[$localID][self::TOKEN_CODE];
        if (!empty($namespace = $this->activeNamespace($tokenID))) {
            $name = $namespace . self::NS_SEPARATOR . $name;
        }

        $this->declarations[\token_name($tokenType)][$name] = [
            self::O_TOKEN => $tokenID,
            self::C_TOKEN => $this->endingToken($tokenID),
        ];
    }

    /**
     * Check if token ID represents `ClassName::class` constant statement.
     */
    private function isClassNameConst(int $tokenID): bool
    {
        return $this->tokens[$tokenID][self::TOKEN_TYPE] === T_CLASS
            && isset($this->tokens[$tokenID - 1])
            && $this->tokens[$tokenID - 1][self::TOKEN_TYPE] === T_PAAMAYIM_NEKUDOTAYIM;
    }

    /**
     * Check if token ID represents anonymous class creation, e.g. `new class ('foo', 'bar')`.
     */
    private function isAnonymousClass(int|string $tokenID): bool
    {
        return $this->tokens[$tokenID][self::TOKEN_TYPE] === T_CLASS
            && isset($this->tokens[$tokenID - 2])
            && $this->tokens[$tokenID - 2][self::TOKEN_TYPE] === T_NEW;
    }

    /**
     * Check if token ID represents named parameter with name `class`, e.g. `foo(class: SomeClass::name)`.
     */
    private function isCorrectDeclaration(int|string $tokenID): bool
    {
        return \in_array($this->tokens[$tokenID][self::TOKEN_TYPE], [T_CLASS, T_TRAIT, T_INTERFACE, T_ENUM], true)
            && isset($this->tokens[$tokenID + 2])
            && $this->tokens[$tokenID + 1][self::TOKEN_TYPE] === T_WHITESPACE
            && $this->tokens[$tokenID + 2][self::TOKEN_TYPE] === T_STRING;
    }

    /**
     * Locate every function or static method call (including $this calls).
     *
     * This is pretty old code, potentially to be improved using AST.
     *
     * @param array<int, mixed> $tokens
     * @param int   $invocationLevel
     */
    private function locateInvocations(array $tokens, int $invocationLevel = 0): void
    {
        //Multiple "(" and ")" statements nested.
        $level = 0;

        //Skip all tokens until next function
        $ignore = false;

        //Were function was found
        $invocationTID = 0;

        //Parsed arguments and their first token id
        $arguments = [];
        $argumentsTID = false;

        //Tokens used to re-enable token detection
        $stopTokens = [T_STRING, T_WHITESPACE, T_DOUBLE_COLON, T_OBJECT_OPERATOR, T_NS_SEPARATOR];
        foreach ($tokens as $tokenID => $token) {
            $tokenType = $token[self::TOKEN_TYPE];

            //We are not indexing function declarations or functions called from $objects.
            if (\in_array($tokenType, [T_FUNCTION, T_OBJECT_OPERATOR, T_NEW])) {
                if (
                    empty($argumentsTID)
                    && (
                        empty($invocationTID)
                        || $this->getSource($invocationTID, $tokenID - 1) !== '$this'
                    )
                ) {
                    //Not a call, function declaration, or object method
                    $ignore = true;
                    continue;
                }
            } elseif ($ignore) {
                if (!\in_array($tokenType, $stopTokens)) {
                    //Returning to search
                    $ignore = false;
                }
                continue;
            }

            //We are inside function, and there is "(", indexing arguments.
            if (!empty($invocationTID) && ($tokenType === '(' || $tokenType === '[')) {
                if (empty($argumentsTID)) {
                    $argumentsTID = $tokenID;
                }

                ++$level;
                if ($level != 1) {
                    //Not arguments beginning, but arguments part
                    $arguments[$tokenID] = $token;
                }

                continue;
            }

            //We are inside function arguments and ")" met.
            if (!empty($invocationTID) && ($tokenType === ')' || $tokenType === ']')) {
                --$level;
                if ($level == -1) {
                    $invocationTID = false;
                    $level = 0;
                    continue;
                }

                //Function fully indexed, we can process it now.
                if ($level == 0) {
                    $this->registerInvocation(
                        $invocationTID,
                        $argumentsTID,
                        $tokenID,
                        $arguments,
                        $invocationLevel
                    );

                    //Closing search
                    $arguments = [];
                    $argumentsTID = $invocationTID = false;
                } else {
                    //Not arguments beginning, but arguments part
                    $arguments[$tokenID] = $token;
                }

                continue;
            }

            //Still inside arguments.
            if (!empty($invocationTID) && !empty($level)) {
                $arguments[$tokenID] = $token;
                continue;
            }

            //Nothing valuable to remember, will be parsed later.
            if (!empty($invocationTID) && \in_array($tokenType, $stopTokens)) {
                continue;
            }

            //Seems like we found function/method call
            if (
                $tokenType == T_STRING
                || $tokenType == T_STATIC
                || $tokenType == T_NS_SEPARATOR
                || ($tokenType == T_VARIABLE && $token[self::TOKEN_CODE] === '$this')
            ) {
                $invocationTID = $tokenID;
                $level = 0;

                $argumentsTID = false;
                continue;
            }

            //Returning to search
            $invocationTID = false;
            $arguments = [];
        }
    }

    /**
     * Registering invocation.
     */
    private function registerInvocation(
        int $invocationID,
        int $argumentsID,
        int $endID,
        array $arguments,
        int $invocationLevel
    ): void {
        //Nested invocations
        $this->locateInvocations($arguments, $invocationLevel + 1);

        [$class, $operator, $name] = $this->fetchContext($invocationID, $argumentsID);

        if (!empty($operator) && empty($class)) {
            //Non detectable
            return;
        }

        $this->invocations[] = new ReflectionInvocation(
            $this->filename,
            $this->lineNumber($invocationID),
            $class,
            $operator,
            $name,
            ReflectionArgument::locateArguments($arguments),
            $this->getSource($invocationID, $endID),
            $invocationLevel
        );
    }

    /**
     * Fetching invocation context.
     */
    private function fetchContext(int $invocationTID, int $argumentsTID): array
    {
        $class = $operator = '';
        $name = \trim($this->getSource($invocationTID, $argumentsTID), '( ');

        //Let's try to fetch all information we need
        if (\str_contains($name, '->')) {
            $operator = '->';
        } elseif (\str_contains($name, '::')) {
            $operator = '::';
        }

        if (!empty($operator)) {
            [$class, $name] = \explode($operator, $name);

            //We now have to clarify class name
            if (\in_array($class, ['self', 'static', '$this'])) {
                $class = $this->activeDeclaration($invocationTID);
            }
        }

        return [$class, $operator, $name];
    }

    /**
     * Get declaration which is active in given token position.
     */
    private function activeDeclaration(int $tokenID): string
    {
        foreach ($this->declarations as $declarations) {
            foreach ($declarations as $name => $position) {
                if ($tokenID >= $position[self::O_TOKEN] && $tokenID <= $position[self::C_TOKEN]) {
                    return $name;
                }
            }
        }

        //Can not be detected
        return '';
    }

    /**
     * Get namespace name active at specified token position.
     */
    private function activeNamespace(int $tokenID): string
    {
        foreach ($this->namespaces as $namespace => $position) {
            if ($tokenID >= $position[self::O_TOKEN] && $tokenID <= $position[self::C_TOKEN]) {
                return $namespace;
            }
        }

        //Seems like no namespace declaration
        $this->namespaces[''] = [
            self::O_TOKEN => 0,
            self::C_TOKEN => \count($this->tokens),
            self::N_USES  => [],
        ];

        return '';
    }

    /**
     * Find token ID of ending brace.
     */
    private function endingToken(int $tokenID): int
    {
        $level = null;
        for ($localID = $tokenID; $localID < $this->countTokens; ++$localID) {
            $token = $this->tokens[$localID];
            if ($token[self::TOKEN_CODE] === '{') {
                ++$level;
                continue;
            }

            if ($token[self::TOKEN_CODE] === '}') {
                --$level;
            }

            if ($level === 0) {
                break;
            }
        }

        return $localID;
    }

    /**
     * Get line number associated with token.
     */
    private function lineNumber(int $tokenID): int
    {
        while (empty($this->tokens[$tokenID][self::TOKEN_LINE])) {
            --$tokenID;
        }

        return $this->tokens[$tokenID][self::TOKEN_LINE];
    }

    /**
     * Get src located between two tokens.
     */
    private function getSource(int $startID, int $endID): string
    {
        $result = '';
        for ($tokenID = $startID; $tokenID <= $endID; ++$tokenID) {
            //Collecting function usage src
            $result .= $this->tokens[$tokenID][self::TOKEN_CODE];
        }

        return $result;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Spiral\Tokenizer\Reflection;
6
7		use Spiral\Tokenizer\Tokenizer;
8
9		/**
10		* File reflections can fetch information about classes, interfaces, functions and traits declared
11		* in file. In addition file reflection provides ability to fetch and describe every method/function
12		* call.
13		*/
14		final class ReflectionFile
15		{
16		/**
17		* Namespace separator.
18		*/
19		public const NS_SEPARATOR = '\\';
20
21		/**
22		* Constants for convenience.
23		*/
24		public const TOKEN_TYPE = Tokenizer::TYPE;
25		public const TOKEN_CODE = Tokenizer::CODE;
26		public const TOKEN_LINE = Tokenizer::LINE;
27
28		/**
29		* Opening and closing token ids.
30		*/
31		public const O_TOKEN = 0;
32		public const C_TOKEN = 1;
33
34		/**
35		* Namespace uses.
36		*/
37		public const N_USES = 2;
38
39		/**
40		* Set of tokens required to detect classes, traits, interfaces and function declarations. We
41		* don't need any other token for that.
42		*/
43		private static array $processTokens = [
44		'{',
45		'}',
46		';',
47		T_PAAMAYIM_NEKUDOTAYIM,
48		T_NAMESPACE,
49		T_STRING,
50		T_CLASS,
51		T_INTERFACE,
52		T_TRAIT,
53		T_ENUM,
54		T_FUNCTION,
55		T_NS_SEPARATOR,
56		T_INCLUDE,
57		T_INCLUDE_ONCE,
58		T_REQUIRE,
59		T_REQUIRE_ONCE,
60		T_USE,
61		T_AS,
62		];
63
64		/**
65		* Parsed tokens array.
66		*
67		* @internal
68		*/
69		private array $tokens = [];
70
71		/**
72		* Total tokens count.
73		*
74		* @internal
75		*/
76		private int $countTokens = 0;
77
78		/**
79		* Indicator that file has external includes.
80		*
81		* @internal
82		*/
83		private bool $hasIncludes = false;
84
85		/**
86		* Namespaces used in file and their token positions.
87		*
88		* @internal
89		*/
90		private array $namespaces = [];
91
92		/**
93		* Declarations of classes, interfaces and traits.
94		*
95		* @internal
96		*/
97		private array $declarations = [];
98
99		/**
100		* Declarations of new functions.
101		*
102		* @internal
103		*/
104		private array $functions = [];
105
106		/**
107		* Every found method/function invocation.
108		*
109		* @internal
110		* @var ReflectionInvocation[]
111		*/
112		private array $invocations = [];
113	345
114		public function __construct(
115		private readonly string $filename
116	345	) {
117	345	$this->tokens = Tokenizer::getTokens($filename);
118		$this->countTokens = \count($this->tokens);
119
120	345	//Looking for declarations
121		$this->locateDeclarations();
122		}
123
124		/**
125		* Filename.
126		*/
127		public function getFilename(): string
128		{
129		return $this->filename;
130		}
131
132		/**
133		* List of declared function names
134	1	*/
135		public function getFunctions(): array
136	1	{
137		return \array_keys($this->functions);
138		}
139
140		/**
141		* List of declared class names
142	332	*/
143		public function getClasses(): array
144	332	{
145	324	if (!isset($this->declarations['T_CLASS'])) {
146		return [];
147		}
148	332
149		return \array_keys($this->declarations['T_CLASS']);
150		}
151
152		/**
153		* List of declared enums names
154	1	*/
155		public function getEnums(): array
156	1	{
157		if (!isset($this->declarations['T_ENUM'])) {
158		return [];
159		}
160	1
161		return \array_keys($this->declarations['T_ENUM']);
162		}
163
164		/**
165		* List of declared trait names
166	1	*/
167		public function getTraits(): array
168	1	{
169		if (!isset($this->declarations['T_TRAIT'])) {
170		return [];
171		}
172	1
173		return \array_keys($this->declarations['T_TRAIT']);
174		}
175
176		/**
177		* List of declared interface names
178	345	*/
179		public function getInterfaces(): array
180	345	{
181		if (!isset($this->declarations['T_INTERFACE'])) {
182		return [];
183		}
184
185		return \array_keys($this->declarations['T_INTERFACE']);
186	344	}
187
188	344	/**
189		* Get list of tokens associated with given file.
190		*/
191		public function getTokens(): array
192		{
193		return $this->tokens;
194		}
195
196		/**
197	26	* Indication that file contains require/include statements
198		*/
199	26	public function hasIncludes(): bool
200	26	{
201		return $this->hasIncludes;
202		}
203	26
204		/**
205		* Locate and return list of every method or function call in specified file. Only static and
206		* $this calls will be indexed
207		*
208		* @return ReflectionInvocation[]
209		*/
210		public function getInvocations(): array
211		{
212		if (empty($this->invocations)) {
213		$this->locateInvocations($this->getTokens());
214		}
215
216		return $this->invocations;
217		}
218
219		/**
220		* Export found declaration as array for caching purposes.
221		*/
222		public function exportSchema(): array
223		{
224		return [$this->hasIncludes, $this->declarations, $this->functions, $this->namespaces];
225	345	}
226
227	345	/**
228	345	* Import cached reflection schema.
229	345	*/
230		protected function importSchema(array $cache)
231		{
232	345	[$this->hasIncludes, $this->declarations, $this->functions, $this->namespaces] = $cache;
233	345	}
234	345
235	345	/**
236		* Locate every class, interface, trait or function definition.
237	345	*/
238	345	protected function locateDeclarations()
239	345	{
240		foreach ($this->getTokens() as $tokenID => $token) {
241	345	if (!\in_array($token[self::TOKEN_TYPE], self::$processTokens)) {
242	344	continue;
243	344	}
244
245	345	switch ($token[self::TOKEN_TYPE]) {
246	345	case T_NAMESPACE:
247	345	$this->registerNamespace($tokenID);
248	345	break;
249
250	344	case T_USE:
251		$this->registerUse($tokenID);
252		break;
253	345
254	345	case T_FUNCTION:
255		$this->registerFunction($tokenID);
256	345	break;
257	345
258	345	case T_CLASS:
259	345	case T_TRAIT:
260	20	case T_INTERFACE:
261		case T_ENUM:
262		if ($this->isClassNameConst($tokenID)) {
263		// PHP5.5 ClassName::class constant
264		continue 2;
265	345	}
266	315
267	315	if ($this->isAnonymousClass($tokenID)) {
268		// PHP7.0 Anonymous classes new class ('foo', 'bar')
269		continue 2;
270		}
271
272		if (!$this->isCorrectDeclaration($tokenID)) {
273		// PHP8.0 Named parameters ->foo(class: 'bar')
274	345	continue 2;
275		}
276	345
277	345	$this->registerDeclaration($tokenID, $token[self::TOKEN_TYPE]);
278		break;
279
280	345	case T_INCLUDE:
281	345	case T_INCLUDE_ONCE:
282		case T_REQUIRE:
283		case T_REQUIRE_ONCE:
284		$this->hasIncludes = true;
285	345	}
286		}
287	345
288	345	//Dropping empty namespace
289	345	if (isset($this->namespaces[''])) {
290		$this->namespaces['\\'] = $this->namespaces[''];
291		unset($this->namespaces['']);
292		}
293	345	}
294
295	345	/**
296	345	* Handle namespace declaration.
297		*/
298		private function registerNamespace(int $tokenID): void
299		{
300	345	$namespace = '';
301	345	$localID = $tokenID + 1;
302
303		do {
304		$token = $this->tokens[$localID++];
305		if ($token[self::TOKEN_CODE] === '{') {
306	345	break;
307	345	}
308	345
309	345	$namespace .= $token[self::TOKEN_CODE];
310	345	} while (
311		isset($this->tokens[$localID])
312		&& $this->tokens[$localID][self::TOKEN_CODE] !== '{'
313		&& $this->tokens[$localID][self::TOKEN_CODE] !== ';'
314		);
315
316	345	//Whitespaces
317		$namespace = \trim($namespace);
318	345
319		$uses = [];
320	345	if (isset($this->namespaces[$namespace])) {
321	345	$uses = $this->namespaces[$namespace];
322	345	}
323	345
324	292	if ($this->tokens[$localID][self::TOKEN_CODE] === ';') {
325	292	$endingID = \count($this->tokens) - 1;
326		} else {
327		$endingID = $this->endingToken($tokenID);
328	345	}
329	345
330		$this->namespaces[$namespace] = [
331	292	self::O_TOKEN => $tokenID,
332		self::C_TOKEN => $endingID,
333		self::N_USES => $uses,
334		];
335	345	}
336	345
337	345	/**
338		* Handle use (import class from another namespace).
339		*/
340	345	private function registerUse(int $tokenID): void
341		{
342		$namespace = \rtrim($this->activeNamespace($tokenID), '\\');
343
344		$class = '';
345		$localAlias = null;
346	344	for ($localID = $tokenID + 1; $this->tokens[$localID][self::TOKEN_CODE] !== ';'; ++$localID) {
347		if ($this->tokens[$localID][self::TOKEN_TYPE] == T_AS) {
348	344	$localAlias = '';
349	344	continue;
350	344	}
351
352	344	if ($localAlias === null) {
353		$class .= $this->tokens[$localID][self::TOKEN_CODE];
354		} else {
355		$localAlias .= $this->tokens[$localID][self::TOKEN_CODE];
356		}
357	313	}
358	313
359		if (empty($localAlias)) {
360	313	$names = explode('\\', $class);
361		$localAlias = end($names);
362		}
363	313
364	313	$this->namespaces[$namespace][self::N_USES][\trim($localAlias)] = \trim($class);
365	21	}
366
367		/**
368	313	* Handle function declaration (function creation).
369	313	*/
370	313	private function registerFunction(int $tokenID): void
371	313	{
372		foreach ($this->declarations as $declarations) {
373		foreach ($declarations as $location) {
374		if ($tokenID >= $location[self::O_TOKEN] && $tokenID <= $location[self::C_TOKEN]) {
375		//We are inside class, function is method
376		return;
377		}
378	345	}
379		}
380	345
381	345	$localID = $tokenID + 1;
382	345	while ($this->tokens[$localID][self::TOKEN_TYPE] !== T_STRING) {
383		//Fetching function name
384		++$localID;
385	345	}
386	345
387	345	$name = $this->tokens[$localID][self::TOKEN_CODE];
388		if (!empty($namespace = $this->activeNamespace($tokenID))) {
389		$name = $namespace . self::NS_SEPARATOR . $name;
390	345	}
391	345
392	345	$this->functions[$name] = [
393	345	self::O_TOKEN => $tokenID,
394		self::C_TOKEN => $this->endingToken($tokenID),
395		];
396		}
397
398		/**
399		* Handle declaration of class, trait of interface. Declaration will be stored under it's token
400		* type in declarations array.
401	345	*/
402		private function registerDeclaration(int $tokenID, int $tokenType): void
403	345	{
404	345	$localID = $tokenID + 1;
405	345	while ($this->tokens[$localID][self::TOKEN_TYPE] !== T_STRING) {
406		++$localID;
407		}
408
409		$name = $this->tokens[$localID][self::TOKEN_CODE];
410		if (!empty($namespace = $this->activeNamespace($tokenID))) {
411		$name = $namespace . self::NS_SEPARATOR . $name;
412		}
413
414		$this->declarations[\token_name($tokenType)][$name] = [
415		self::O_TOKEN => $tokenID,
416	26	self::C_TOKEN => $this->endingToken($tokenID),
417		];
418		}
419	26
420		/**
421		* Check if token ID represents `ClassName::class` constant statement.
422	26	*/
423		private function isClassNameConst(int $tokenID): bool
424		{
425	26	return $this->tokens[$tokenID][self::TOKEN_TYPE] === T_CLASS
426		&& isset($this->tokens[$tokenID - 1])
427		&& $this->tokens[$tokenID - 1][self::TOKEN_TYPE] === T_PAAMAYIM_NEKUDOTAYIM;
428	26	}
429	26
430		/**
431		* Check if token ID represents anonymous class creation, e.g. `new class ('foo', 'bar')`.
432	26	*/
433	26	private function isAnonymousClass(int\|string $tokenID): bool
434	26	{
435		return $this->tokens[$tokenID][self::TOKEN_TYPE] === T_CLASS
436		&& isset($this->tokens[$tokenID - 2])
437	26	&& $this->tokens[$tokenID - 2][self::TOKEN_TYPE] === T_NEW;
438		}
439	26
440		/**
441	26	* Check if token ID represents named parameter with name `class`, e.g. `foo(class: SomeClass::name)`.
442	26	*/
443		private function isCorrectDeclaration(int\|string $tokenID): bool
444		{
445		return \in_array($this->tokens[$tokenID][self::TOKEN_TYPE], [T_CLASS, T_TRAIT, T_INTERFACE, T_ENUM], true)
446	26	&& isset($this->tokens[$tokenID + 2])
447	26	&& $this->tokens[$tokenID + 1][self::TOKEN_TYPE] === T_WHITESPACE
448		&& $this->tokens[$tokenID + 2][self::TOKEN_TYPE] === T_STRING;
449	26	}
450	26
451		/**
452	26	* Locate every function or static method call (including $this calls).
453		*
454	26	* This is pretty old code, potentially to be improved using AST.
455		*
456		* @param array<int, mixed> $tokens
457		* @param int $invocationLevel
458	26	*/
459	26	private function locateInvocations(array $tokens, int $invocationLevel = 0): void
460	26	{
461		//Multiple "(" and ")" statements nested.
462		$level = 0;
463	26
464	26	//Skip all tokens until next function
465		$ignore = false;
466	26
467		//Were function was found
468		$invocationTID = 0;
469	26
470		//Parsed arguments and their first token id
471		$arguments = [];
472		$argumentsTID = false;
473	26
474	26	//Tokens used to re-enable token detection
475	26	$stopTokens = [T_STRING, T_WHITESPACE, T_DOUBLE_COLON, T_OBJECT_OPERATOR, T_NS_SEPARATOR];
476	25	foreach ($tokens as $tokenID => $token) {
477	25	$tokenType = $token[self::TOKEN_TYPE];
478	25
479		//We are not indexing function declarations or functions called from $objects.
480		if (\in_array($tokenType, [T_FUNCTION, T_OBJECT_OPERATOR, T_NEW])) {
481		if (
482	26	empty($argumentsTID)
483	26	&& (
484	26	empty($invocationTID)
485	26	\|\| $this->getSource($invocationTID, $tokenID - 1) !== '$this'
486	26	)
487	26	) {
488	26	//Not a call, function declaration, or object method
489	26	$ignore = true;
490		continue;
491		}
492	26	} elseif ($ignore) {
493	26	if (!\in_array($tokenType, $stopTokens)) {
494		//Returning to search
495		$ignore = false;
496	26	}
497		continue;
498		}
499	26
500		//We are inside function, and there is "(", indexing arguments.
501		if (!empty($invocationTID) && ($tokenType === '(' \|\| $tokenType === '[')) {
502		if (empty($argumentsTID)) {
503	26	$argumentsTID = $tokenID;
504	26	}
505	26
506		++$level;
507		if ($level != 1) {
508		//Not arguments beginning, but arguments part
509	26	$arguments[$tokenID] = $token;
510	26	}
511
512		continue;
513		}
514
515	26	//We are inside function arguments and ")" met.
516	26	if (!empty($invocationTID) && ($tokenType === ')' \|\| $tokenType === ']')) {
517	26	--$level;
518	26	if ($level == -1) {
519		$invocationTID = false;
520	26	$level = 0;
521	26	continue;
522		}
523	26
524	26	//Function fully indexed, we can process it now.
525		if ($level == 0) {
526		$this->registerInvocation(
527		$invocationTID,
528	26	$argumentsTID,
529	26	$tokenID,
530		$arguments,
531		$invocationLevel
532		);
533
534		//Closing search
535		$arguments = [];
536	26	$argumentsTID = $invocationTID = false;
537		} else {
538		//Not arguments beginning, but arguments part
539		$arguments[$tokenID] = $token;
540		}
541
542		continue;
543		}
544	26
545		//Still inside arguments.
546	26	if (!empty($invocationTID) && !empty($level)) {
547		$arguments[$tokenID] = $token;
548	26	continue;
549		}
550
551		//Nothing valuable to remember, will be parsed later.
552		if (!empty($invocationTID) && \in_array($tokenType, $stopTokens)) {
553	26	continue;
554	26	}
555	26
556	26	//Seems like we found function/method call
557	26	if (
558	26	$tokenType == T_STRING
559	26	\|\| $tokenType == T_STATIC
560	26	\|\| $tokenType == T_NS_SEPARATOR
561	26	\|\| ($tokenType == T_VARIABLE && $token[self::TOKEN_CODE] === '$this')
562	26	) {
563		$invocationTID = $tokenID;
564		$level = 0;
565
566		$argumentsTID = false;
567		continue;
568	26	}
569
570	26	//Returning to search
571	26	$invocationTID = false;
572		$arguments = [];
573		}
574	26	}
575	26
576	26	/**
577	25	* Registering invocation.
578		*/
579		private function registerInvocation(
580	26	int $invocationID,
581	26	int $argumentsID,
582		int $endID,
583		array $arguments,
584	26	int $invocationLevel
585	26	): void {
586		//Nested invocations
587		$this->locateInvocations($arguments, $invocationLevel + 1);
588
589	26	[$class, $operator, $name] = $this->fetchContext($invocationID, $argumentsID);
590
591		if (!empty($operator) && empty($class)) {
592		//Non detectable
593		return;
594		}
595	26
596		$this->invocations[] = new ReflectionInvocation(
597	26	$this->filename,
598	26	$this->lineNumber($invocationID),
599	26	$class,
600	26	$operator,
601		$name,
602		ReflectionArgument::locateArguments($arguments),
603		$this->getSource($invocationID, $endID),
604		$invocationLevel
605		);
606		}
607
608		/**
609		* Fetching invocation context.
610		*/
611		private function fetchContext(int $invocationTID, int $argumentsTID): array
612	345	{
613		$class = $operator = '';
614	345	$name = \trim($this->getSource($invocationTID, $argumentsTID), '( ');
615	345
616	345	//Let's try to fetch all information we need
617		if (\str_contains($name, '->')) {
618		$operator = '->';
619		} elseif (\str_contains($name, '::')) {
620		$operator = '::';
621	315	}
622	315
623	315	if (!empty($operator)) {
624	315	[$class, $name] = \explode($operator, $name);
625	315
626		//We now have to clarify class name
627	315	if (\in_array($class, ['self', 'static', '$this'])) {
628		$class = $this->activeDeclaration($invocationTID);
629		}
630		}
631
632		return [$class, $operator, $name];
633	345	}
634
635	345	/**
636	345	* Get declaration which is active in given token position.
637	345	*/
638	345	private function activeDeclaration(int $tokenID): string
639	345	{
640	345	foreach ($this->declarations as $declarations) {
641		foreach ($declarations as $name => $position) {
642		if ($tokenID >= $position[self::O_TOKEN] && $tokenID <= $position[self::C_TOKEN]) {
643	345	return $name;
644	345	}
645		}
646		}
647	345
648	345	//Can not be detected
649		return '';
650		}
651
652	345	/**
653		* Get namespace name active at specified token position.
654		*/
655		private function activeNamespace(int $tokenID): string
656		{
657		foreach ($this->namespaces as $namespace => $position) {
658	26	if ($tokenID >= $position[self::O_TOKEN] && $tokenID <= $position[self::C_TOKEN]) {
659		return $namespace;
660	26	}
661		}
662
663		//Seems like no namespace declaration
664	26	$this->namespaces[''] = [
665		self::O_TOKEN => 0,
666		self::C_TOKEN => \count($this->tokens),
667		self::N_USES => [],
668		];
669
670	26	return '';
671		}
672	26
673	26	/**
674		* Find token ID of ending brace.
675	26	*/
676		private function endingToken(int $tokenID): int
677		{
678	26	$level = null;
679		for ($localID = $tokenID; $localID < $this->countTokens; ++$localID) {
680		$token = $this->tokens[$localID];
681		if ($token[self::TOKEN_CODE] === '{') {
682		++$level;
683		continue;
684		}
685
686		if ($token[self::TOKEN_CODE] === '}') {
687		--$level;
688		}
689
690		if ($level === 0) {
691		break;
692		}
693		}
694
695		return $localID;
696		}
697
698		/**
699		* Get line number associated with token.
700		*/
701		private function lineNumber(int $tokenID): int
702		{
703		while (empty($this->tokens[$tokenID][self::TOKEN_LINE])) {
704		--$tokenID;
705		}
706
707		return $this->tokens[$tokenID][self::TOKEN_LINE];
708		}
709
710		/**
711		* Get src located between two tokens.
712		*/
713		private function getSource(int $startID, int $endID): string
714		{
715		$result = '';
716		for ($tokenID = $startID; $tokenID <= $endID; ++$tokenID) {
717		//Collecting function usage src
718		$result .= $this->tokens[$tokenID][self::TOKEN_CODE];
719		}
720
721		return $result;
722		}
723		}
724

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