Parser::path() - Code Metrics - Inspection of "Support for v2 fetch path fixes #2" - tmilos/scim-filter-parser - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( c87449...b1fa0d )

by Milos

created 2016-12-23 10:29 UTC

Parser::path() A

↳ Parent: Parser

Complexity

Conditions	3
Paths	3

Size

Total Lines	15
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	15
rs	9.4285
c	0
b	0
f	0
cc	3
eloc	9
nc	3
nop	0

<?php

/*
 * This file is part of the tmilos/scim-filter-parser package.
 *
 * (c) Milos Tomic <[email protected]>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace Tmilos\ScimFilterParser;

use Tmilos\Lexer\Config\LexerArrayConfig;
use Tmilos\Lexer\Lexer;
use Tmilos\Lexer\Token;
use Tmilos\ScimFilterParser\Ast\Tokens;

class Parser
{
    /** @var Lexer */
    private $lexer;

    /** @var Version */
    private $version;

    /** @var Mode */
    private $mode;

    /** @var bool */
    private $inValuePath;

    /**
     * @param Mode    $mode
     * @param Version $version
     */
    public function __construct(Mode $mode = null, Version $version = null)
    {
        $this->lexer = new Lexer(new LexerArrayConfig(LexerConfigFactory::getConfig()));
        $this->version = $version ?: Version::V2();
        $this->mode = $mode ?: Mode::FILTER();
        if ($this->mode->equals(Mode::PATH) && !$this->version->equals(Version::V2)) {
            throw new \InvalidArgumentException('Path mode is available only in SCIM version 2');
        }
    }

    /**
     * @return Version
     */
    public function getVersion()
    {
        return $this->version;
    }

    /**
     * @param Version $version
     */
    public function setVersion(Version $version)
    {
        $this->version = $version;
    }

    /**
     * @param string $input
     *
     * @return Ast\Node
     */
    public function parse($input)
    {
        $this->inValuePath = false;
        $this->lexer->setInput($input);
        $this->lexer->moveNext();

        $node = null;
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
        if ($this->mode->equals(Mode::FILTER)) {
            $node = $this->disjunction();
        } else {
            $node = $this->path();
        }

        $this->match(null);

        return $node;
    }

    /**
     * @return Ast\Path
     */
    private function path()
    {
        if ($this->isValuePathIncoming()) {
            $valuePath = $this->valuePath();
            $attributePath = null;
            if ($this->lexer->isNextToken(Tokens::T_DOT)) {
                $this->match(Tokens::T_DOT);
                $attributePath = $this->attributePath();
            }

            return Ast\Path::fromValuePath($valuePath, $attributePath);
        }

        return Ast\Path::fromAttributePath($this->attributePath());
    }

    /**
     * @return Ast\Term|Ast\Disjunction
     */
    private function disjunction()

    {
        /** @var Ast\Term[] $terms */
        $terms = [];
        $terms[] = $this->conjunction();

        if ($this->lexer->isNextToken(Tokens::T_SP)) {
            $nextToken = $this->lexer->glimpse();
            if ($nextToken && $nextToken->is(Tokens::T_OR)) {
                $this->match(Tokens::T_SP);
                $this->match(Tokens::T_OR);
                $this->match(Tokens::T_SP);
                $terms[] = $this->conjunction();
            }
        }

        if (count($terms) == 1) {
            return $terms[0];
        }

        return new Ast\Disjunction($terms);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
    }

    /**
     * @return Ast\Conjunction|Ast\Factor
     */
    private function conjunction()

    {
        $factors = [];
        $factors[] = $this->factor();

        if ($this->lexer->isNextToken(Tokens::T_SP)) {
            $nextToken = $this->lexer->glimpse();
            if ($nextToken && $nextToken->is(Tokens::T_AND)) {
                $this->match(Tokens::T_SP);
                $this->match(Tokens::T_AND);
                $this->match(Tokens::T_SP);
                $factors[] = $this->factor();
            }
        }

        if (count($factors) == 1) {
            return $factors[0];
        }

        return new Ast\Conjunction($factors);
    }

    /**
     * @return Ast\Filter
     */
    private function factor()
    {
        if ($this->lexer->isNextToken(Tokens::T_NOT)) {
            // not ( filter )
            $this->match(Tokens::T_NOT);
            $this->match(Tokens::T_SP);
            $this->match(Tokens::T_PAREN_OPEN);
            $filter = $this->disjunction();
            $this->match(Tokens::T_PAREN_CLOSE);

            return new Ast\Negation($filter);
        } elseif ($this->lexer->isNextToken(Tokens::T_PAREN_OPEN)) {
            // ( filter )
            $this->match(Tokens::T_PAREN_OPEN);
            $filter = $this->disjunction();
            $this->match(Tokens::T_PAREN_CLOSE);

            return $filter;
        }

        if ($this->version->equals(Version::V2()) && !$this->inValuePath) {
            if ($this->isValuePathIncoming()) {
                return $this->valuePath();
            }
        }

        return $this->comparisionExpression();
    }

    /**
     * @return Ast\ValuePath
     */
    private function valuePath()
    {
        $attributePath = $this->attributePath();
        $this->match(Tokens::T_BRACKET_OPEN);
        $this->inValuePath = true;
        $filter = $this->disjunction();
        $this->match(Tokens::T_BRACKET_CLOSE);
        $this->inValuePath = false;

        return new Ast\ValuePath($attributePath, $filter);
    }

    /**
     * @return Ast\ComparisonExpression
     */
    private function comparisionExpression()
    {
        $attributePath = $this->attributePath();
        $this->match(Tokens::T_SP);

        $operator = $this->comparisonOperator();

        $compareValue = null;
        if ($operator != 'pr') {
            $this->match(Tokens::T_SP);
            $compareValue = $this->compareValue();
        }

        return new Ast\ComparisonExpression($attributePath, $operator, $compareValue);
    }

    /**
     * @param Ast\AttributePath $attributePath
     *
     * @return Ast\AttributePath
     */
    private function attributePath(Ast\AttributePath $attributePath = null)
    {
        $this->match(Tokens::T_ATTR_NAME);

        if (!$attributePath) {
            $attributePath = new Ast\AttributePath();
        }
        $attributePath->add($this->lexer->getToken()->getValue());

        if ($this->lexer->isNextToken(Tokens::T_DOT)) {
            $this->match(Tokens::T_DOT);
            $this->attributePath($attributePath);
        }

        return $attributePath;
    }

    /**
     * @return string
     */
    private function comparisonOperator()
    {
        if (!$this->lexer->isNextTokenAny(Tokens::compareOperators())) {
            $this->syntaxError('comparision operator');
        }
        $this->match($this->lexer->getLookahead()->getName());

        return $this->lexer->getToken()->getValue();
    }

    /**
     * @return mixed
     */
    private function compareValue()
    {
        if (!$this->lexer->isNextTokenAny(Tokens::compareValues())) {
            $this->syntaxError('comparison value');
        }
        $this->match($this->lexer->getLookahead()->getName());

        $value = json_decode($this->lexer->getToken()->getValue());
        if (preg_match(
                '/^(\\d\\d\\d\\d)-(\\d\\d)-(\\d\\d)T(\\d\\d):(\\d\\d):(\\d\\d)(?:\\.\\d+)?Z$/D',
                $value,
                $matches
            )) {
            $year = intval($matches[1]);
            $month = intval($matches[2]);
            $day = intval($matches[3]);
            $hour = intval($matches[4]);
            $minute = intval($matches[5]);
            $second = intval($matches[6]);
            // Use gmmktime because the timestamp will always be given in UTC.
            $ts = gmmktime($hour, $minute, $second, $month, $day, $year);

            $value = new \DateTime('@'.$ts, new \DateTimeZone('UTC'));
        }

        return $value;
    }

    /**
     * @return bool
     */
    private function isValuePathIncoming()
    {
        $tokenAfterAttributePath = $this->lexer->peekWhileTokens([Tokens::T_ATTR_NAME, Tokens::T_DOT]);
        $this->lexer->resetPeek();

        return $tokenAfterAttributePath ? $tokenAfterAttributePath->is(Tokens::T_BRACKET_OPEN) : false;
    }

    private function match($tokenName)
    {
        if (null === $tokenName) {
            if ($this->lexer->getLookahead()) {
                $this->syntaxError('end of input');
            }
        } else {
            if (!$this->lexer->getLookahead() || !$this->lexer->getLookahead()->is($tokenName)) {
                $this->syntaxError($tokenName);
            }

            $this->lexer->moveNext();
        }
    }

    private function syntaxError($expected = '', Token $token = null)
    {
        if (null === $token) {
            $token = $this->lexer->getLookahead();
        }
        if ($token) {
            $offset = $token->getOffset();
        } elseif ($this->lexer->getToken()) {
            $offset = $this->lexer->getToken()->getOffset();
        } else {
            $offset = strlen($this->lexer->getInput());
        }

        $message = "line 0, col {$offset}: Error: ";
        $message .= ($expected !== '') ? "Expected {$expected}, got " : 'Unexpected ';
        $message .= ($token === null) ? 'end of string.' : "'{$token->getValue()}'";

        throw Error\FilterException::syntaxError($message, Error\FilterException::filterError($this->lexer->getInput()));
    }
}


1		<?php
2
3		/*
4		* This file is part of the tmilos/scim-filter-parser package.
5		*
6		* (c) Milos Tomic <[email protected]>
7		*
8		* This source file is subject to the MIT license that is bundled
9		* with this source code in the file LICENSE.
10		*/
11
12		namespace Tmilos\ScimFilterParser;
13
14		use Tmilos\Lexer\Config\LexerArrayConfig;
15		use Tmilos\Lexer\Lexer;
16		use Tmilos\Lexer\Token;
17		use Tmilos\ScimFilterParser\Ast\Tokens;
18
19		class Parser
20		{
21		/** @var Lexer */
22		private $lexer;
23
24		/** @var Version */
25		private $version;
26
27		/** @var Mode */
28		private $mode;
29
30		/** @var bool */
31		private $inValuePath;
32
33		/**
34		* @param Mode $mode
35		* @param Version $version
36		*/
37		public function __construct(Mode $mode = null, Version $version = null)
38		{
39		$this->lexer = new Lexer(new LexerArrayConfig(LexerConfigFactory::getConfig()));
40		$this->version = $version ?: Version::V2();
41		$this->mode = $mode ?: Mode::FILTER();
42		if ($this->mode->equals(Mode::PATH) && !$this->version->equals(Version::V2)) {
43		throw new \InvalidArgumentException('Path mode is available only in SCIM version 2');
44		}
45		}
46
47		/**
48		* @return Version
49		*/
50		public function getVersion()
51		{
52		return $this->version;
53		}
54
55		/**
56		* @param Version $version
57		*/
58		public function setVersion(Version $version)
59		{
60		$this->version = $version;
61		}
62
63		/**
64		* @param string $input
65		*
66		* @return Ast\Node
67		*/
68		public function parse($input)
69		{
70		$this->inValuePath = false;
71		$this->lexer->setInput($input);
72		$this->lexer->moveNext();
73
74		$node = null;
		0 ignored issues – show Unused Code introduced 2016-12-23 09:19 UTC by Report Bug Copy Issue Report `$node` 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 `$higher` is always overwritten for every possible time line. Loading history...
75		if ($this->mode->equals(Mode::FILTER)) {
76		$node = $this->disjunction();
77		} else {
78		$node = $this->path();
79		}
80
81		$this->match(null);
82
83		return $node;
84		}
85
86		/**
87		* @return Ast\Path
88		*/
89		private function path()
90		{
91		if ($this->isValuePathIncoming()) {
92		$valuePath = $this->valuePath();
93		$attributePath = null;
94		if ($this->lexer->isNextToken(Tokens::T_DOT)) {
95		$this->match(Tokens::T_DOT);
96		$attributePath = $this->attributePath();
97		}
98
99		return Ast\Path::fromValuePath($valuePath, $attributePath);
100		}
101
102		return Ast\Path::fromAttributePath($this->attributePath());
103		}
104
105		/**
106		* @return Ast\Term\|Ast\Disjunction
107		*/
108	View Code Duplication	private function disjunction()
		0 ignored issues – show Duplication introduced 2016-12-21 10:02 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
109		{
110		/** @var Ast\Term[] $terms */
111		$terms = [];
112		$terms[] = $this->conjunction();
113
114		if ($this->lexer->isNextToken(Tokens::T_SP)) {
115		$nextToken = $this->lexer->glimpse();
116		if ($nextToken && $nextToken->is(Tokens::T_OR)) {
117		$this->match(Tokens::T_SP);
118		$this->match(Tokens::T_OR);
119		$this->match(Tokens::T_SP);
120		$terms[] = $this->conjunction();
121		}
122		}
123
124		if (count($terms) == 1) {
125		return $terms[0];
126		}
127
128		return new Ast\Disjunction($terms);
		0 ignored issues – show Documentation introduced 2016-12-21 10:02 UTC by Report Bug Copy Issue Report `$terms` is of type `array<integer,object<Tmi...arser\Ast\Disjunction>>`, but the function expects a `array<integer,object<Tmi...FilterParser\Ast\Term>>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
129		}
130
131		/**
132		* @return Ast\Conjunction\|Ast\Factor
133		*/
134	View Code Duplication	private function conjunction()
		0 ignored issues – show Duplication introduced 2016-12-21 10:02 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
135		{
136		$factors = [];
137		$factors[] = $this->factor();
138
139		if ($this->lexer->isNextToken(Tokens::T_SP)) {
140		$nextToken = $this->lexer->glimpse();
141		if ($nextToken && $nextToken->is(Tokens::T_AND)) {
142		$this->match(Tokens::T_SP);
143		$this->match(Tokens::T_AND);
144		$this->match(Tokens::T_SP);
145		$factors[] = $this->factor();
146		}
147		}
148
149		if (count($factors) == 1) {
150		return $factors[0];
151		}
152
153		return new Ast\Conjunction($factors);
154		}
155
156		/**
157		* @return Ast\Filter
158		*/
159		private function factor()
160		{
161		if ($this->lexer->isNextToken(Tokens::T_NOT)) {
162		// not ( filter )
163		$this->match(Tokens::T_NOT);
164		$this->match(Tokens::T_SP);
165		$this->match(Tokens::T_PAREN_OPEN);
166		$filter = $this->disjunction();
167		$this->match(Tokens::T_PAREN_CLOSE);
168
169		return new Ast\Negation($filter);
170		} elseif ($this->lexer->isNextToken(Tokens::T_PAREN_OPEN)) {
171		// ( filter )
172		$this->match(Tokens::T_PAREN_OPEN);
173		$filter = $this->disjunction();
174		$this->match(Tokens::T_PAREN_CLOSE);
175
176		return $filter;
177		}
178
179		if ($this->version->equals(Version::V2()) && !$this->inValuePath) {
180		if ($this->isValuePathIncoming()) {
181		return $this->valuePath();
182		}
183		}
184
185		return $this->comparisionExpression();
186		}
187
188		/**
189		* @return Ast\ValuePath
190		*/
191		private function valuePath()
192		{
193		$attributePath = $this->attributePath();
194		$this->match(Tokens::T_BRACKET_OPEN);
195		$this->inValuePath = true;
196		$filter = $this->disjunction();
197		$this->match(Tokens::T_BRACKET_CLOSE);
198		$this->inValuePath = false;
199
200		return new Ast\ValuePath($attributePath, $filter);
201		}
202
203		/**
204		* @return Ast\ComparisonExpression
205		*/
206		private function comparisionExpression()
207		{
208		$attributePath = $this->attributePath();
209		$this->match(Tokens::T_SP);
210
211		$operator = $this->comparisonOperator();
212
213		$compareValue = null;
214		if ($operator != 'pr') {
215		$this->match(Tokens::T_SP);
216		$compareValue = $this->compareValue();
217		}
218
219		return new Ast\ComparisonExpression($attributePath, $operator, $compareValue);
220		}
221
222		/**
223		* @param Ast\AttributePath $attributePath
224		*
225		* @return Ast\AttributePath
226		*/
227		private function attributePath(Ast\AttributePath $attributePath = null)
228		{
229		$this->match(Tokens::T_ATTR_NAME);
230
231		if (!$attributePath) {
232		$attributePath = new Ast\AttributePath();
233		}
234		$attributePath->add($this->lexer->getToken()->getValue());
235
236		if ($this->lexer->isNextToken(Tokens::T_DOT)) {
237		$this->match(Tokens::T_DOT);
238		$this->attributePath($attributePath);
239		}
240
241		return $attributePath;
242		}
243
244		/**
245		* @return string
246		*/
247		private function comparisonOperator()
248		{
249		if (!$this->lexer->isNextTokenAny(Tokens::compareOperators())) {
250		$this->syntaxError('comparision operator');
251		}
252		$this->match($this->lexer->getLookahead()->getName());
253
254		return $this->lexer->getToken()->getValue();
255		}
256
257		/**
258		* @return mixed
259		*/
260		private function compareValue()
261		{
262		if (!$this->lexer->isNextTokenAny(Tokens::compareValues())) {
263		$this->syntaxError('comparison value');
264		}
265		$this->match($this->lexer->getLookahead()->getName());
266
267		$value = json_decode($this->lexer->getToken()->getValue());
268		if (preg_match(
269		'/^(\\d\\d\\d\\d)-(\\d\\d)-(\\d\\d)T(\\d\\d):(\\d\\d):(\\d\\d)(?:\\.\\d+)?Z$/D',
270		$value,
271		$matches
272		)) {
273		$year = intval($matches[1]);
274		$month = intval($matches[2]);
275		$day = intval($matches[3]);
276		$hour = intval($matches[4]);
277		$minute = intval($matches[5]);
278		$second = intval($matches[6]);
279		// Use gmmktime because the timestamp will always be given in UTC.
280		$ts = gmmktime($hour, $minute, $second, $month, $day, $year);
281
282		$value = new \DateTime('@'.$ts, new \DateTimeZone('UTC'));
283		}
284
285		return $value;
286		}
287
288		/**
289		* @return bool
290		*/
291		private function isValuePathIncoming()
292		{
293		$tokenAfterAttributePath = $this->lexer->peekWhileTokens([Tokens::T_ATTR_NAME, Tokens::T_DOT]);
294		$this->lexer->resetPeek();
295
296		return $tokenAfterAttributePath ? $tokenAfterAttributePath->is(Tokens::T_BRACKET_OPEN) : false;
297		}
298
299		private function match($tokenName)
300		{
301		if (null === $tokenName) {
302		if ($this->lexer->getLookahead()) {
303		$this->syntaxError('end of input');
304		}
305		} else {
306		if (!$this->lexer->getLookahead() \|\| !$this->lexer->getLookahead()->is($tokenName)) {
307		$this->syntaxError($tokenName);
308		}
309
310		$this->lexer->moveNext();
311		}
312		}
313
314		private function syntaxError($expected = '', Token $token = null)
315		{
316		if (null === $token) {
317		$token = $this->lexer->getLookahead();
318		}
319		if ($token) {
320		$offset = $token->getOffset();
321		} elseif ($this->lexer->getToken()) {
322		$offset = $this->lexer->getToken()->getOffset();
323		} else {
324		$offset = strlen($this->lexer->getInput());
325		}
326
327		$message = "line 0, col {$offset}: Error: ";
328		$message .= ($expected !== '') ? "Expected {$expected}, got " : 'Unexpected ';
329		$message .= ($token === null) ? 'end of string.' : "'{$token->getValue()}'";
330
331		throw Error\FilterException::syntaxError($message, Error\FilterException::filterError($this->lexer->getInput()));
332		}
333		}
334

tmilos / scim-filter-parser

Push — master ( c87449...b1fa0d )

Parser::path() A

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

Filter issues like