NodeExpressionResolver::resolveExprConstFetch() - Code Metrics - Inspection of "Making code PHP 5.4 compatible" - goaop/parser-reflection - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#15)

by Alexander

created 2016-06-07 17:03 UTC

NodeExpressionResolver::resolveExprConstFetch() C

↳ Parent: NodeExpressionResolver

Complexity

Conditions	8
Paths	16

Size

Total Lines	34
Code Lines	21

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	21
CRAP Score	8

Importance

Changes

Metric	Value
dl	0
loc	34
c	0
b	0
f	0
ccs	21
cts	21
cp	1
rs	5.3846
cc	8
eloc	21
nc	16
nop	1
crap	8

<?php
/**
 * Parser Reflection API
 *
 * @copyright Copyright 2015, Lisachenko Alexander <[email protected]>
 *
 * This source file is subject to the license that is bundled
 * with this source code in the file LICENSE.
 */

namespace Go\ParserReflection\ValueResolver;

use Go\ParserReflection\ReflectionClass;
use Go\ParserReflection\ReflectionException;
use Go\ParserReflection\ReflectionFileNamespace;
use PhpParser\Node;
use PhpParser\Node\Expr;
use PhpParser\Node\Scalar;
use PhpParser\Node\Scalar\MagicConst;

/**
 * Tries to resolve expression into value
 */
class NodeExpressionResolver
{

    /**
     * List of exception for constant fetch
     *
     * @var array
     */
    private static $notConstants = [
        'true'  => true,
        'false' => true,
        'null'  => true,
    ];

    /**
     * Name of the constant (if present)
     *
     * @var null|string
     */
    private $constantName = null;

    /**
     * Current reflection context for parsing
     *
     * @var mixed
     */
    private $context;

    /**
     * Flag if expression is constant
     *
     * @var bool
     */
    private $isConstant = false;

    /**
     * Node resolving level, 1 = top-level
     *
     * @var int
     */
    private $nodeLevel = 0;

    /**
     * @var mixed Value of expression/constant
     */
    private $value;

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

    public function getConstantName()
    {
        return $this->constantName;
    }

    public function getValue()
    {
        return $this->value;
    }

    public function isConstant()
    {
        return $this->isConstant;
    }

    /**
     * {@inheritDoc}
     */
    public function process(Node $node)
    {
        $this->nodeLevel    = 0;
        $this->isConstant   = false;
        $this->constantName = null;
        $this->value        = $this->resolve($node);
    }

    /**
     * Resolves node into valid value
     *
     * @param Node $node
     *
     * @return mixed
     */
    protected function resolve(Node $node)
    {
        $value = null;
        try {
            ++$this->nodeLevel;

            $nodeType   = $node->getType();
            $methodName = 'resolve' . str_replace('_', '', $nodeType);
            if (method_exists($this, $methodName)) {
                $value = $this->$methodName($node);
            }

            --$this->nodeLevel;
        } catch (\Exception $e) {
            --$this->nodeLevel;
        }

        return $value;
    }

    protected function resolveScalarDNumber(Scalar\DNumber $node)
    {
        return $node->value;
    }

    protected function resolveScalarLNumber(Scalar\LNumber $node)
    {
        return $node->value;
    }

    protected function resolveScalarString(Scalar\String_ $node)
    {
        return $node->value;
    }

    protected function resolveScalarMagicConstMethod()
    {
        if ($this->context instanceof \ReflectionMethod) {
            $fullName = $this->context->getDeclaringClass()->getName() . '::' . $this->context->getShortName();

            return $fullName;
        }

        return '';
    }

    protected function resolveScalarMagicConstFunction()
    {
        if ($this->context instanceof \ReflectionFunctionAbstract) {
            return $this->context->getName();
        }

        return '';
    }

    protected function resolveScalarMagicConstNamespace()
    {
        if (method_exists($this->context, 'getNamespaceName')) {
            return $this->context->getNamespaceName();
        }

        if ($this->context instanceof ReflectionFileNamespace) {
            return $this->context->getName();
        }

        return '';
    }

    protected function resolveScalarMagicConstClass()
    {
        if ($this->context instanceof \ReflectionClass) {
            return $this->context->getName();
        }
        if (method_exists($this->context, 'getDeclaringClass')) {
            $declaringClass = $this->context->getDeclaringClass();
            if ($declaringClass instanceof \ReflectionClass) {
                return $declaringClass->getName();
            }
        }

        return '';
    }

    protected function resolveScalarMagicConstDir()
    {
        if (method_exists($this->context, 'getFileName')) {
            return dirname($this->context->getFileName());
        }

        return '';
    }

    protected function resolveScalarMagicConstFile()
    {
        if (method_exists($this->context, 'getFileName')) {
            return $this->context->getFileName();
        }

        return '';
    }

    protected function resolveScalarMagicConstLine(MagicConst\Line $node)
    {
        return $node->hasAttribute('startLine') ? $node->getAttribute('startLine') : 0;
    }

    protected function resolveScalarMagicConstTrait()
    {
        if ($this->context instanceof \ReflectionClass && $this->context->isTrait()) {
            return $this->context->getName();
        }

        return '';
    }

    protected function resolveExprConstFetch(Expr\ConstFetch $node)
    {
        $constantValue = null;
        $isResolved    = false;

        /** @var ReflectionFileNamespace|null $fileNamespace */
        $fileNamespace = null;
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
        $isFQNConstant = $node->name instanceof Node\Name\FullyQualified;
        $constantName  = $node->name->toString();

        if (!$isFQNConstant) {
            if (method_exists($this->context, 'getFileName')) {
                $fileName      = $this->context->getFileName();
                $namespaceName = $this->context->getNamespaceName();
                $fileNamespace = new ReflectionFileNamespace($fileName, $namespaceName);
                if ($fileNamespace->hasConstant($constantName)) {
                    $constantValue = $fileNamespace->getConstant($constantName);
                    $constantName  = $fileNamespace->getName() . '\\' . $constantName;
                    $isResolved    = true;
                }
            }
        }

        if (!$isResolved && defined($constantName)) {
            $constantValue = constant($constantName);
        }

        if ($this->nodeLevel === 1 && !isset(self::$notConstants[$constantName])) {
            $this->isConstant   = true;
            $this->constantName = $constantName;
        }

        return $constantValue;
    }

    protected function resolveExprClassConstFetch(Expr\ClassConstFetch $node)
    {
        $refClass     = $this->fetchReflectionClass($node->class);
        $constantName = $node->name;

        // special handling of ::class constants
        if ('class' === $constantName) {
            return $refClass->getName();
        }

        return $refClass->getConstant($constantName);
    }

    protected function resolveExprArray(Expr\Array_ $node)
    {
        $result = [];
        foreach ($node->items as $itemIndex => $arrayItem) {
            $itemValue = $this->resolve($arrayItem->value);
            $itemKey   = isset($arrayItem->key) ? $this->resolve($arrayItem->key) : $itemIndex;
            $result[$itemKey] = $itemValue;
        }

        return $result;
    }

    /**
     * Utility method to fetch reflection class instance by name
     *
     * Supports:
     *   'self' keyword
     *   'parent' keyword
     *    not-FQN class names
     *
     * @param Node\Name $node Class name node
     *
     * @return bool|\ReflectionClass
     *
     * @throws ReflectionException
     */
    private function fetchReflectionClass(Node\Name $node)
    {
        $className  = $node->toString();
        $isFQNClass = $node instanceof Node\Name\FullyQualified;
        if ($isFQNClass) {
            return new ReflectionClass($className);
        }

        if ('self' === $className) {
            if ($this->context instanceof \ReflectionClass) {
                return $this->context;
            } elseif (method_exists($this->context, 'getDeclaringClass')) {
                return $this->context->getDeclaringClass();
            }
        }

        if ('parent' === $className) {
            if ($this->context instanceof \ReflectionClass) {
                return $this->context->getParentClass();
            } elseif (method_exists($this->context, 'getDeclaringClass')) {
                return $this->context->getDeclaringClass()->getParentClass();
            }
        }

        if (method_exists($this->context, 'getFileName')) {
            /** @var ReflectionFileNamespace|null $fileNamespace */
            $fileName      = $this->context->getFileName();
            $namespaceName = $this->context->getNamespaceName();

            $fileNamespace = new ReflectionFileNamespace($fileName, $namespaceName);
            return $fileNamespace->getClass($className);
        }

        throw new ReflectionException("Can not resolve class $className");
    }
}


1		<?php
2		/**
3		* Parser Reflection API
4		*
5		* @copyright Copyright 2015, Lisachenko Alexander <[email protected]>
6		*
7		* This source file is subject to the license that is bundled
8		* with this source code in the file LICENSE.
9		*/
10
11		namespace Go\ParserReflection\ValueResolver;
12
13		use Go\ParserReflection\ReflectionClass;
14		use Go\ParserReflection\ReflectionException;
15		use Go\ParserReflection\ReflectionFileNamespace;
16		use PhpParser\Node;
17		use PhpParser\Node\Expr;
18		use PhpParser\Node\Scalar;
19		use PhpParser\Node\Scalar\MagicConst;
20
21		/**
22		* Tries to resolve expression into value
23		*/
24		class NodeExpressionResolver
25		{
26
27		/**
28		* List of exception for constant fetch
29		*
30		* @var array
31		*/
32		private static $notConstants = [
33		'true' => true,
34		'false' => true,
35		'null' => true,
36		];
37
38		/**
39		* Name of the constant (if present)
40		*
41		* @var null\|string
42		*/
43		private $constantName = null;
44
45		/**
46		* Current reflection context for parsing
47		*
48		* @var mixed
49		*/
50		private $context;
51
52		/**
53		* Flag if expression is constant
54		*
55		* @var bool
56		*/
57		private $isConstant = false;
58
59		/**
60		* Node resolving level, 1 = top-level
61		*
62		* @var int
63		*/
64		private $nodeLevel = 0;
65
66		/**
67		* @var mixed Value of expression/constant
68		*/
69		private $value;
70
71	36	public function __construct($context)
72		{
73	36	$this->context = $context;
74	36	}
75
76	10	public function getConstantName()
77		{
78	10	return $this->constantName;
79		}
80
81	22	public function getValue()
82		{
83	22	return $this->value;
84		}
85
86	10	public function isConstant()
87		{
88	10	return $this->isConstant;
89		}
90
91		/**
92		* {@inheritDoc}
93		*/
94	22	public function process(Node $node)
95		{
96	22	$this->nodeLevel = 0;
97	22	$this->isConstant = false;
98	22	$this->constantName = null;
99	22	$this->value = $this->resolve($node);
100	22	}
101
102		/**
103		* Resolves node into valid value
104		*
105		* @param Node $node
106		*
107		* @return mixed
108		*/
109	22	protected function resolve(Node $node)
110		{
111	22	$value = null;
112		try {
113	22	++$this->nodeLevel;
114
115	22	$nodeType = $node->getType();
116	22	$methodName = 'resolve' . str_replace('_', '', $nodeType);
117	22	if (method_exists($this, $methodName)) {
118	22	$value = $this->$methodName($node);
119		}
120
121	22	--$this->nodeLevel;
122		} catch (\Exception $e) {
123		--$this->nodeLevel;
124		}
125
126	22	return $value;
127		}
128
129	4	protected function resolveScalarDNumber(Scalar\DNumber $node)
130		{
131	4	return $node->value;
132		}
133
134	13	protected function resolveScalarLNumber(Scalar\LNumber $node)
135		{
136	13	return $node->value;
137		}
138
139	9	protected function resolveScalarString(Scalar\String_ $node)
140		{
141	9	return $node->value;
142		}
143
144		protected function resolveScalarMagicConstMethod()
145		{
146		if ($this->context instanceof \ReflectionMethod) {
147		$fullName = $this->context->getDeclaringClass()->getName() . '::' . $this->context->getShortName();
148
149		return $fullName;
150		}
151
152		return '';
153		}
154
155		protected function resolveScalarMagicConstFunction()
156		{
157		if ($this->context instanceof \ReflectionFunctionAbstract) {
158		return $this->context->getName();
159		}
160
161		return '';
162		}
163
164	10	protected function resolveScalarMagicConstNamespace()
165		{
166	10	if (method_exists($this->context, 'getNamespaceName')) {
167	8	return $this->context->getNamespaceName();
168		}
169
170	2	if ($this->context instanceof ReflectionFileNamespace) {
171	2	return $this->context->getName();
172		}
173
174		return '';
175		}
176
177	8	protected function resolveScalarMagicConstClass()
178		{
179	8	if ($this->context instanceof \ReflectionClass) {
180	1	return $this->context->getName();
181		}
182	7	if (method_exists($this->context, 'getDeclaringClass')) {
183		$declaringClass = $this->context->getDeclaringClass();
184		if ($declaringClass instanceof \ReflectionClass) {
185		return $declaringClass->getName();
186		}
187		}
188
189	7	return '';
190		}
191
192	1	protected function resolveScalarMagicConstDir()
193		{
194	1	if (method_exists($this->context, 'getFileName')) {
195	1	return dirname($this->context->getFileName());
196		}
197
198		return '';
199		}
200
201	3	protected function resolveScalarMagicConstFile()
202		{
203	3	if (method_exists($this->context, 'getFileName')) {
204	3	return $this->context->getFileName();
205		}
206
207		return '';
208		}
209
210	3	protected function resolveScalarMagicConstLine(MagicConst\Line $node)
211		{
212	3	return $node->hasAttribute('startLine') ? $node->getAttribute('startLine') : 0;
213		}
214
215	1	protected function resolveScalarMagicConstTrait()
216		{
217	1	if ($this->context instanceof \ReflectionClass && $this->context->isTrait()) {
218	1	return $this->context->getName();
219		}
220
221		return '';
222		}
223
224	13	protected function resolveExprConstFetch(Expr\ConstFetch $node)
225		{
226	13	$constantValue = null;
227	13	$isResolved = false;
228
229		/** @var ReflectionFileNamespace\|null $fileNamespace */
230	13	$fileNamespace = null;
		0 ignored issues – show Unused Code introduced 2015-11-22 20:22 UTC by Report Bug Copy Issue Report `$fileNamespace` 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...
231	13	$isFQNConstant = $node->name instanceof Node\Name\FullyQualified;
232	13	$constantName = $node->name->toString();
233
234	13	if (!$isFQNConstant) {
235	13	if (method_exists($this->context, 'getFileName')) {
236	13	$fileName = $this->context->getFileName();
237	13	$namespaceName = $this->context->getNamespaceName();
238	13	$fileNamespace = new ReflectionFileNamespace($fileName, $namespaceName);
239	13	if ($fileNamespace->hasConstant($constantName)) {
240	9	$constantValue = $fileNamespace->getConstant($constantName);
241	9	$constantName = $fileNamespace->getName() . '\\' . $constantName;
242	9	$isResolved = true;
243		}
244		}
245		}
246
247	13	if (!$isResolved && defined($constantName)) {
248	12	$constantValue = constant($constantName);
249		}
250
251	13	if ($this->nodeLevel === 1 && !isset(self::$notConstants[$constantName])) {
252	9	$this->isConstant = true;
253	9	$this->constantName = $constantName;
254		}
255
256	13	return $constantValue;
257		}
258
259	4	protected function resolveExprClassConstFetch(Expr\ClassConstFetch $node)
260		{
261	4	$refClass = $this->fetchReflectionClass($node->class);
262	4	$constantName = $node->name;
263
264		// special handling of ::class constants
265	4	if ('class' === $constantName) {
266	1	return $refClass->getName();
267		}
268
269	4	return $refClass->getConstant($constantName);
270		}
271
272	9	protected function resolveExprArray(Expr\Array_ $node)
273		{
274	9	$result = [];
275	9	foreach ($node->items as $itemIndex => $arrayItem) {
276	8	$itemValue = $this->resolve($arrayItem->value);
277	8	$itemKey = isset($arrayItem->key) ? $this->resolve($arrayItem->key) : $itemIndex;
278	8	$result[$itemKey] = $itemValue;
279		}
280
281	9	return $result;
282		}
283
284		/**
285		* Utility method to fetch reflection class instance by name
286		*
287		* Supports:
288		* 'self' keyword
289		* 'parent' keyword
290		* not-FQN class names
291		*
292		* @param Node\Name $node Class name node
293		*
294		* @return bool\|\ReflectionClass
295		*
296		* @throws ReflectionException
297		*/
298	4	private function fetchReflectionClass(Node\Name $node)
299		{
300	4	$className = $node->toString();
301	4	$isFQNClass = $node instanceof Node\Name\FullyQualified;
302	4	if ($isFQNClass) {
303	1	return new ReflectionClass($className);
304		}
305
306	4	if ('self' === $className) {
307	4	if ($this->context instanceof \ReflectionClass) {
308	4	return $this->context;
309		} elseif (method_exists($this->context, 'getDeclaringClass')) {
310		return $this->context->getDeclaringClass();
311		}
312		}
313
314	1	if ('parent' === $className) {
315	1	if ($this->context instanceof \ReflectionClass) {
316	1	return $this->context->getParentClass();
317		} elseif (method_exists($this->context, 'getDeclaringClass')) {
318		return $this->context->getDeclaringClass()->getParentClass();
319		}
320		}
321
322		if (method_exists($this->context, 'getFileName')) {
323		/** @var ReflectionFileNamespace\|null $fileNamespace */
324		$fileName = $this->context->getFileName();
325		$namespaceName = $this->context->getNamespaceName();
326
327		$fileNamespace = new ReflectionFileNamespace($fileName, $namespaceName);
328		return $fileNamespace->getClass($className);
329		}
330
331		throw new ReflectionException("Can not resolve class $className");
332		}
333		}
334

goaop / parser-reflection

Pull Request — master (#15)

NodeExpressionResolver::resolveExprConstFetch() C

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