PhpFileParser::computeNestingParentTokens() - Code Metrics - Inspection of "New scrutinizer config and updated tests for new c..." - Srokap/code_review - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Branch — master (486a28)

by Paweł

created 2016-05-15 12:57 UTC

PhpFileParser::computeNestingParentTokens() C

↳ Parent: PhpFileParser

Complexity

Conditions	11
Paths	14

Size

Total Lines	45
Code Lines	27

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	28
CRAP Score	11.6653

Importance

Changes	2
Bugs	0	Features	1

Metric	Value
cc	11
eloc	27
c	2
b	0
f	1
nc	14
nop	1
dl	0
loc	45
rs	5.2653
ccs	28
cts	34
cp	0.8235
crap	11.6653

How to fix Complexity

<?php
/**
 * Splits file source to tokens, provides ways to manipulate tokens list and output modified source.
 * Intended to help in code replacements on language syntax level.
 */
class PhpFileParser implements Iterator, ArrayAccess {
namespace YourVendor;

class YourClass { }

	/**
	 * @var string original file name
	 */
	private $fileName = null;

	/**
	 * @var array
	 */
	private $tokens = null;

	/**
	 * @var string
	 */
	private $sha1hash = null;

	/**
	 * @param $fileName
	 * @throws CodeReview_IOException
	 * @throws Exception
	 */
	public function __construct($fileName) {
		$this->validateFilePath($fileName);
		$this->fileName = $fileName;

		$contents = file_get_contents($fileName);
		if ($contents === false) {
			throw new CodeReview_IOException("Error while fetching contents of file $fileName");
		}

		$this->sha1hash = sha1_file($fileName);
		if ($this->sha1hash === false) {
			throw new CodeReview_IOException("Error while computing SHA1 hash of file $fileName");
		}

		$this->tokens = token_get_all($contents);
		if (!is_array($this->tokens)) {
			throw new Exception("Failed to parse PHP contents of $fileName");
		}
		$this->computeNestingParentTokens();
	}

	/**
	 * Return fileds to serialize.
	 *
	 * @return array
	 */
	public function __sleep() {
		return array('fileName', 'sha1hash', 'tokens');
	}

	/**
	 * Verify class contents against original file to detect changes.
	 */
	public function __wakeup() {
		$this->validateFileContents();
	}

	/**
	 * Uses SHA1 hash to determine if file contents has changed since analysis.
	 *
	 * @return bool
	 * @throws CodeReview_IOException
	 * @throws LogicException
	 */
	protected function validateFileContents() {
		if (!$this->fileName) {
			throw new LogicException("Missing file's path. Looks like severe internal error.");
		}
		$this->validateFilePath($this->fileName);
		if (!$this->sha1hash) {
			throw new LogicException("Missing file's SHA1 hash. Looks like severe internal error.");
		}
		if ($this->sha1hash !== sha1_file($this->fileName)) {
			throw new CodeReview_IOException("The file on disk has changed and this " . get_class($this) . " class instance is no longer valid for use. Please create fresh instance.");
		}
		return true;
	}

	/**
	 * Checks if file exists and is readable.
	 *
	 * @param $fileName
	 * @return bool
	 * @throws CodeReview_IOException
	 */
	protected function validateFilePath($fileName) {
		if (!file_exists($fileName)) {
			throw new CodeReview_IOException("File $fileName does not exists");
		}
		if (!is_file($fileName)) {
			throw new CodeReview_IOException("$fileName must be a file");
		}
		if (!is_readable($fileName)) {
			throw new CodeReview_IOException("File $fileName is not readable");
		}
		return true;
	}

	/**
	 * Compute parents of the tokens to easily determine containing methods and classes.
	 *
	 * @param bool $debug
	 */
	private function computeNestingParentTokens($debug = false) {
		$nesting = 0;
		$parents = array();
		$lastParent = null;
		foreach ($this->tokens as $key => $token) {
			if (is_array($token)) {
				//add info about parent to array
				$parent = $parents ? $parents[count($parents)-1] : null;
				$this->tokens[$key][3] = $parent;
				$this->tokens[$key][4] = $nesting;

				//is current token possible parent in current level?
				if ($this->isEqualToAnyToken(array(T_CLASS, T_INTERFACE, T_FUNCTION), $key)) {
					$lastParent = $key + 2;
				} elseif ($this->isEqualToAnyToken(array(T_CURLY_OPEN, T_DOLLAR_OPEN_CURLY_BRACES), $key)) {
					$nesting++;
					array_push($parents, '');//just a placeholder
					if ($debug) {
						echo "$nesting\{\$\n";
					}
				}
//				elseif ($this->isEqualToToken(T_DO, $key)) {

//					$lastParent = $key;
//				} elseif ($this->isEqualToToken(T_WHILE, $key)) {
//					$lastParent = $key;
//				} elseif ($this->isEqualToToken(T_FOR, $key)) {
//					$lastParent = $key;
//				}
			} else {
				if ($token == '{') {
					$nesting++;
					if ($debug) {
						echo "$nesting{\n";
					}
					array_push($parents, $lastParent);
				} elseif ($token == '}') {
					if ($debug) {
						echo "$nesting}\n";
					}
					$nesting--;
					array_pop($parents);
				}
			}
		}
	}

	/**
	 * @param array $tokens
	 * @param int   $offset
	 * @return bool
	 */
	public function isEqualToAnyToken($tokens, $offset = null) {
		foreach ($tokens as $token) {
			if ($this->isEqualToToken($token, $offset)) {
				return true;
			}
		}
		return false;
	}

	/**
	 * @param $token string|int individual token identifier or predefined T_* constant value for complex tokens
	 * @param int $offset optional offset when checking other than current
	 * @return bool
	 */
	public function isEqualToToken($token, $offset = null) {
		if ($offset === null) {
			$offset = $this->key();
		}
		if (!isset($this[$offset])) {
			return false;
		}
		$val = $this[$offset];
		if (is_string($token)) {
			//assume one char token that gets passed directly as string
			return $val == $token;
		}
		return is_array($val) && $val[0] == $token;
	}

	/**
	 * @param int $offset optional offset when checking other than current
	 * @return mixed
	 */
	public function getDefiningFunctionName($offset = null) {
		if ($offset === null) {
			$offset = $this->key();
		}
		$parentKey = $this->tokens[$offset][3];
		while ($parentKey !== null && !$this->isEqualToToken(T_FUNCTION, $parentKey - 2)) {
			$parentKey = $this->tokens[$parentKey][3];
		}
		if ($parentKey !== null) {
			$class = $this->getDefiningClassName($parentKey);
			if ($class) {
				return $class . '::' . $this->tokens[$parentKey][1];
			} else {
				return $this->tokens[$parentKey][1];
			}
		}
		return null;
	}

	/**
	 * @param int $offset optional offset when checking other than current
	 * @return mixed
	 */
	public function getDefiningClassName($offset = null) {
		if ($offset === null) {
			$offset = $this->key();
		}
		$parentKey = $this->tokens[$offset][3];
		while ($parentKey !== null && !$this->isEqualToToken(T_CLASS, $parentKey - 2)) {
			$parentKey = $this->tokens[$parentKey][3];
		}
		if ($parentKey !== null) {
			return $this->tokens[$parentKey][1];
		}
		return null;
	}

	/**
	 * @param string $fileName
	 * @return bool|string
	 * @throws CodeReview_IOException
	 */
	public function exportPhp($fileName = null) {
		$source = '';
		$data = $this->tokens;
		reset($data);
		foreach ($data as $val) {
			if (is_array($val)) {
				$source .= $val[1];
			} else {
				$source .= $val;
			}
		}

		if ($fileName !== null) {
			if (!is_writable($fileName)) {
				throw new CodeReview_IOException("$fileName must be writable");
			}
			return file_put_contents($fileName, $source) !== false;
		} else {
			return $source;
		}
	}

	/**
	 * (PHP 5 &gt;= 5.0.0)<br/>
	 * Return the current element
	 *
	 * @link http://php.net/manual/en/iterator.current.php
	 * @return mixed Can return any type.
	 */
	public function current() {
		return current($this->tokens);
	}

	/**
	 * (PHP 5 &gt;= 5.0.0)<br/>
	 * Move forward to next element
	 * @link http://php.net/manual/en/iterator.next.php
	 * @return void Any returned value is ignored.
	 */
	public function next() {
		next($this->tokens);
	}

	/**
	 * (PHP 5 &gt;= 5.0.0)<br/>
	 * Return the key of the current element
	 * @link http://php.net/manual/en/iterator.key.php
	 * @return mixed scalar on success, or null on failure.
	 */
	public function key() {
		return key($this->tokens);
	}

	/**
	 * (PHP 5 &gt;= 5.0.0)<br/>
	 * Checks if current position is valid
	 * @link http://php.net/manual/en/iterator.valid.php
	 * @return boolean The return value will be casted to boolean and then evaluated.
	 *       Returns true on success or false on failure.
	 */
	public function valid() {
		$key = key($this->tokens);
		$var = ($key !== null && $key !== false);
		return $var;
	}

	/**
	 * (PHP 5 &gt;= 5.0.0)<br/>
	 * Rewind the Iterator to the first element
	 * @link http://php.net/manual/en/iterator.rewind.php
	 * @return void Any returned value is ignored.
	 */
	public function rewind() {
		reset($this->tokens);
	}

	/**
	 * (PHP 5 &gt;= 5.0.0)<br/>
	 * Whether a offset exists
	 * @link http://php.net/manual/en/arrayaccess.offsetexists.php
	 * @param mixed $offset <p>
	 *                      An offset to check for.
	 * </p>
	 * @return boolean true on success or false on failure.
	 * </p>
	 * <p>
	 *       The return value will be casted to boolean if non-boolean was returned.
	 */
	public function offsetExists($offset) {
		return isset($this->tokens[$offset]);
	}

	/**
	 * (PHP 5 &gt;= 5.0.0)<br/>
	 * Offset to retrieve
	 * @link http://php.net/manual/en/arrayaccess.offsetget.php
	 * @param mixed $offset <p>
	 *                      The offset to retrieve.
	 * </p>
	 * @return mixed Can return all value types.
	 */
	public function offsetGet($offset) {
		return $this->tokens[$offset];
	}

	/**
	 * (PHP 5 &gt;= 5.0.0)<br/>
	 * Offset to set
	 * @link http://php.net/manual/en/arrayaccess.offsetset.php
	 * @param mixed $offset <p>
	 *                      The offset to assign the value to.
	 * </p>
	 * @param mixed $value  <p>
	 *                      The value to set.
	 * </p>
	 * @return void
	 */
	public function offsetSet($offset, $value) {
		$this->tokens[$offset] = $value;
	}

	/**
	 * (PHP 5 &gt;= 5.0.0)<br/>
	 * Offset to unset
	 * @link http://php.net/manual/en/arrayaccess.offsetunset.php
	 * @param mixed $offset <p>
	 *                      The offset to unset.
	 * </p>
	 * @return void
	 */
	public function offsetUnset($offset) {
		unset($this->tokens[$offset]);
	}
}

1		<?php
2		/**
3		* Splits file source to tokens, provides ways to manipulate tokens list and output modified source.
4		* Intended to help in code replacements on language syntax level.
5		*/
6		class PhpFileParser implements Iterator, ArrayAccess {
		0 ignored issues – show Coding Style Compatibility introduced 2016-05-15 12:57 UTC by Report Bug Copy Issue Report PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions. You can fix this by adding a namespace to your class: namespace YourVendor; class YourClass { } When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries. Loading history...
7
8		/**
9		* @var string original file name
10		*/
11		private $fileName = null;
12
13		/**
14		* @var array
15		*/
16		private $tokens = null;
17
18		/**
19		* @var string
20		*/
21		private $sha1hash = null;
22
23		/**
24		* @param $fileName
25		* @throws CodeReview_IOException
26		* @throws Exception
27		*/
28	12	public function __construct($fileName) {
29	12	$this->validateFilePath($fileName);
30	10	$this->fileName = $fileName;
31
32	10	$contents = file_get_contents($fileName);
33	10	if ($contents === false) {
34		throw new CodeReview_IOException("Error while fetching contents of file $fileName");
35		}
36
37	10	$this->sha1hash = sha1_file($fileName);
38	10	if ($this->sha1hash === false) {
39		throw new CodeReview_IOException("Error while computing SHA1 hash of file $fileName");
40		}
41
42	10	$this->tokens = token_get_all($contents);
43	10	if (!is_array($this->tokens)) {
44		throw new Exception("Failed to parse PHP contents of $fileName");
45		}
46	10	$this->computeNestingParentTokens();
47	10	}
48
49		/**
50		* Return fileds to serialize.
51		*
52		* @return array
53		*/
54	6	public function __sleep() {
55	6	return array('fileName', 'sha1hash', 'tokens');
56		}
57
58		/**
59		* Verify class contents against original file to detect changes.
60		*/
61	6	public function __wakeup() {
62	6	$this->validateFileContents();
63	2	}
64
65		/**
66		* Uses SHA1 hash to determine if file contents has changed since analysis.
67		*
68		* @return bool
69		* @throws CodeReview_IOException
70		* @throws LogicException
71		*/
72	6	protected function validateFileContents() {
73	6	if (!$this->fileName) {
74	1	throw new LogicException("Missing file's path. Looks like severe internal error.");
75		}
76	5	$this->validateFilePath($this->fileName);
77	4	if (!$this->sha1hash) {
78	1	throw new LogicException("Missing file's SHA1 hash. Looks like severe internal error.");
79		}
80	3	if ($this->sha1hash !== sha1_file($this->fileName)) {
81	1	throw new CodeReview_IOException("The file on disk has changed and this " . get_class($this) . " class instance is no longer valid for use. Please create fresh instance.");
82		}
83	2	return true;
84		}
85
86		/**
87		* Checks if file exists and is readable.
88		*
89		* @param $fileName
90		* @return bool
91		* @throws CodeReview_IOException
92		*/
93	12	protected function validateFilePath($fileName) {
94	12	if (!file_exists($fileName)) {
95	2	throw new CodeReview_IOException("File $fileName does not exists");
96		}
97	11	if (!is_file($fileName)) {
98	1	throw new CodeReview_IOException("$fileName must be a file");
99		}
100	10	if (!is_readable($fileName)) {
101		throw new CodeReview_IOException("File $fileName is not readable");
102		}
103	10	return true;
104		}
105
106		/**
107		* Compute parents of the tokens to easily determine containing methods and classes.
108		*
109		* @param bool $debug
110		*/
111	10	private function computeNestingParentTokens($debug = false) {
112	10	$nesting = 0;
113	10	$parents = array();
114	10	$lastParent = null;
115	10	foreach ($this->tokens as $key => $token) {
116	10	if (is_array($token)) {
117		//add info about parent to array
118	10	$parent = $parents ? $parents[count($parents)-1] : null;
119	10	$this->tokens[$key][3] = $parent;
120	10	$this->tokens[$key][4] = $nesting;
121
122		//is current token possible parent in current level?
123	10	if ($this->isEqualToAnyToken(array(T_CLASS, T_INTERFACE, T_FUNCTION), $key)) {
124	10	$lastParent = $key + 2;
125	10	} elseif ($this->isEqualToAnyToken(array(T_CURLY_OPEN, T_DOLLAR_OPEN_CURLY_BRACES), $key)) {
126	7	$nesting++;
127	7	array_push($parents, '');//just a placeholder
128	7	if ($debug) {
129		echo "$nesting\{\$\n";
130		}
131	7	}
132		// elseif ($this->isEqualToToken(T_DO, $key)) {
		0 ignored issues – show Unused Code Comprehensibility introduced 2016-05-15 12:57 UTC by Report Bug Copy Issue Report `52%` of this comment could be valid code. Did you maybe forget this after debugging? Sometimes obsolete code just ends up commented out instead of removed. In this case it is better to remove the code once you have checked you do not need it. The code might also have been commented out for debugging purposes. In this case it is vital that someone uncomments it again or your project may behave in very unexpected ways in production. This check looks for comments that seem to be mostly valid code and reports them. Loading history...
133		// $lastParent = $key;
134		// } elseif ($this->isEqualToToken(T_WHILE, $key)) {
135		// $lastParent = $key;
136		// } elseif ($this->isEqualToToken(T_FOR, $key)) {
137		// $lastParent = $key;
138		// }
139	10	} else {
140	10	if ($token == '{') {
141	10	$nesting++;
142	10	if ($debug) {
143		echo "$nesting{\n";
144		}
145	10	array_push($parents, $lastParent);
146	10	} elseif ($token == '}') {
147	10	if ($debug) {
148		echo "$nesting}\n";
149		}
150	10	$nesting--;
151	10	array_pop($parents);
152	10	}
153		}
154	10	}
155	10	}
156
157		/**
158		* @param array $tokens
159		* @param int $offset
160		* @return bool
161		*/
162	10	public function isEqualToAnyToken($tokens, $offset = null) {
163	10	foreach ($tokens as $token) {
164	10	if ($this->isEqualToToken($token, $offset)) {
165	10	return true;
166		}
167	10	}
168	10	return false;
169		}
170
171		/**
172		* @param $token string\|int individual token identifier or predefined T_* constant value for complex tokens
173		* @param int $offset optional offset when checking other than current
174		* @return bool
175		*/
176	10	public function isEqualToToken($token, $offset = null) {
177	10	if ($offset === null) {
178		$offset = $this->key();
179		}
180	10	if (!isset($this[$offset])) {
181		return false;
182		}
183	10	$val = $this[$offset];
184	10	if (is_string($token)) {
185		//assume one char token that gets passed directly as string
186		return $val == $token;
187		}
188	10	return is_array($val) && $val[0] == $token;
189		}
190
191		/**
192		* @param int $offset optional offset when checking other than current
193		* @return mixed
194		*/
195		public function getDefiningFunctionName($offset = null) {
196		if ($offset === null) {
197		$offset = $this->key();
198		}
199		$parentKey = $this->tokens[$offset][3];
200		while ($parentKey !== null && !$this->isEqualToToken(T_FUNCTION, $parentKey - 2)) {
201		$parentKey = $this->tokens[$parentKey][3];
202		}
203		if ($parentKey !== null) {
204		$class = $this->getDefiningClassName($parentKey);
205		if ($class) {
206		return $class . '::' . $this->tokens[$parentKey][1];
207		} else {
208		return $this->tokens[$parentKey][1];
209		}
210		}
211		return null;
212		}
213
214		/**
215		* @param int $offset optional offset when checking other than current
216		* @return mixed
217		*/
218		public function getDefiningClassName($offset = null) {
219		if ($offset === null) {
220		$offset = $this->key();
221		}
222		$parentKey = $this->tokens[$offset][3];
223		while ($parentKey !== null && !$this->isEqualToToken(T_CLASS, $parentKey - 2)) {
224		$parentKey = $this->tokens[$parentKey][3];
225		}
226		if ($parentKey !== null) {
227		return $this->tokens[$parentKey][1];
228		}
229		return null;
230		}
231
232		/**
233		* @param string $fileName
234		* @return bool\|string
235		* @throws CodeReview_IOException
236		*/
237	1	public function exportPhp($fileName = null) {
238	1	$source = '';
239	1	$data = $this->tokens;
240	1	reset($data);
241	1	foreach ($data as $val) {
242	1	if (is_array($val)) {
243	1	$source .= $val[1];
244	1	} else {
245	1	$source .= $val;
246		}
247	1	}
248
249	1	if ($fileName !== null) {
250		if (!is_writable($fileName)) {
251		throw new CodeReview_IOException("$fileName must be writable");
252		}
253		return file_put_contents($fileName, $source) !== false;
254		} else {
255	1	return $source;
256		}
257		}
258
259		/**
260		* (PHP 5 >= 5.0.0)<br/>
261		* Return the current element
262		*
263		* @link http://php.net/manual/en/iterator.current.php
264		* @return mixed Can return any type.
265		*/
266	3	public function current() {
267	3	return current($this->tokens);
268		}
269
270		/**
271		* (PHP 5 >= 5.0.0)<br/>
272		* Move forward to next element
273		* @link http://php.net/manual/en/iterator.next.php
274		* @return void Any returned value is ignored.
275		*/
276	3	public function next() {
277	3	next($this->tokens);
278	3	}
279
280		/**
281		* (PHP 5 >= 5.0.0)<br/>
282		* Return the key of the current element
283		* @link http://php.net/manual/en/iterator.key.php
284		* @return mixed scalar on success, or null on failure.
285		*/
286	3	public function key() {
287	3	return key($this->tokens);
288		}
289
290		/**
291		* (PHP 5 >= 5.0.0)<br/>
292		* Checks if current position is valid
293		* @link http://php.net/manual/en/iterator.valid.php
294		* @return boolean The return value will be casted to boolean and then evaluated.
295		* Returns true on success or false on failure.
296		*/
297	3	public function valid() {
298	3	$key = key($this->tokens);
299	3	$var = ($key !== null && $key !== false);
300	3	return $var;
301		}
302
303		/**
304		* (PHP 5 >= 5.0.0)<br/>
305		* Rewind the Iterator to the first element
306		* @link http://php.net/manual/en/iterator.rewind.php
307		* @return void Any returned value is ignored.
308		*/
309	3	public function rewind() {
310	3	reset($this->tokens);
311	3	}
312
313		/**
314		* (PHP 5 >= 5.0.0)<br/>
315		* Whether a offset exists
316		* @link http://php.net/manual/en/arrayaccess.offsetexists.php
317		* @param mixed $offset <p>
318		* An offset to check for.
319		* </p>
320		* @return boolean true on success or false on failure.
321		* </p>
322		* <p>
323		* The return value will be casted to boolean if non-boolean was returned.
324		*/
325	10	public function offsetExists($offset) {
326	10	return isset($this->tokens[$offset]);
327		}
328
329		/**
330		* (PHP 5 >= 5.0.0)<br/>
331		* Offset to retrieve
332		* @link http://php.net/manual/en/arrayaccess.offsetget.php
333		* @param mixed $offset <p>
334		* The offset to retrieve.
335		* </p>
336		* @return mixed Can return all value types.
337		*/
338	10	public function offsetGet($offset) {
339	10	return $this->tokens[$offset];
340		}
341
342		/**
343		* (PHP 5 >= 5.0.0)<br/>
344		* Offset to set
345		* @link http://php.net/manual/en/arrayaccess.offsetset.php
346		* @param mixed $offset <p>
347		* The offset to assign the value to.
348		* </p>
349		* @param mixed $value <p>
350		* The value to set.
351		* </p>
352		* @return void
353		*/
354		public function offsetSet($offset, $value) {
355		$this->tokens[$offset] = $value;
356		}
357
358		/**
359		* (PHP 5 >= 5.0.0)<br/>
360		* Offset to unset
361		* @link http://php.net/manual/en/arrayaccess.offsetunset.php
362		* @param mixed $offset <p>
363		* The offset to unset.
364		* </p>
365		* @return void
366		*/
367		public function offsetUnset($offset) {
368		unset($this->tokens[$offset]);
369		}
370		}

Srokap / code_review

Branch — master (486a28)

PhpFileParser::computeNestingParentTokens() C

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