ExtractorDefinitionBuilder::buildExtractor() - Code Metrics - Inspection of "Merge pull request #8 from pinepain/new-features" - pinepain/js-sandbox - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 344583...2d30d0 )

by Bogdan

created 2017-11-06 20:27 UTC

ExtractorDefinitionBuilder::buildExtractor() C

↳ Parent: ExtractorDefinitionBuilder

Complexity

Conditions	7
Paths	24

Size

Total Lines	28
Code Lines	15

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	14
CRAP Score	7

Importance

Changes

Metric	Value
dl	0
loc	28
ccs	14
cts	14
cp	1
rs	6.7272
c	0
b	0
f	0
cc	7
eloc	15
nc	24
nop	5
crap	7

<?php declare(strict_types=1);

/*
 * This file is part of the pinepain/js-sandbox PHP library.
 *
 * Copyright (c) 2016-2017 Bogdan Padalko <[email protected]>
 *
 * Licensed under the MIT license: http://opensource.org/licenses/MIT
 *
 * For the full copyright and license information, please view the
 * LICENSE file that was distributed with this source or visit
 * http://opensource.org/licenses/MIT
 */


namespace Pinepain\JsSandbox\Extractors;


use Pinepain\JsSandbox\Extractors\Definition\ExtractorDefinitionInterface;
use Pinepain\JsSandbox\Extractors\Definition\PlainExtractorDefinition;
use Pinepain\JsSandbox\Extractors\Definition\PlainExtractorDefinitionInterface;
use Pinepain\JsSandbox\Extractors\Definition\RecursiveExtractorDefinition;
use Pinepain\JsSandbox\Extractors\Definition\VariableExtractorDefinition;


class ExtractorDefinitionBuilder implements ExtractorDefinitionBuilderInterface
{
    /**
     * @var string
     */
    protected $type_regexp = '/
    ^
    (
        (?<name>
            [-_\w]*
        )
        (?:
            \s*
            (?<group>
                \(
                \s*
                (?<param>
                    (?-4)*
                    |
                    [\w\\\\]+
                )
                \s*
                \)
            )
        )?
        (?:
            \s*
            (?<arr>(?:\s*\[\s*\]\s*)+)
        )?
        (?:
            \s*
            \|
            \s*
            (?<alt>(?-6))
        )?
    )
    $
    /xi';

    /**
     * {@inheritdoc}
     */
    public function build(string $definition): ExtractorDefinitionInterface
    {
        $definition = trim($definition);

        if (!$definition) {
            throw new ExtractorDefinitionBuilderException('Definition must be non-empty string');
        }

        try {
            if (preg_match($this->type_regexp, $definition, $matches)) {
                $extractor = $this->buildExtractor($matches['name'], $matches['param'] ?? '', $matches['alt'] ?? '', $this->getDepth($matches), $this->hasGroups($matches));

                return $extractor;
            }
        } catch (ExtractorDefinitionBuilderException $e) {
            // We don't care about what specific issue we hit inside,
            // for API user it means that the definition is invalid
        }

        throw new ExtractorDefinitionBuilderException("Unable to parse definition: '{$definition}'");
    }

    /**
     * @param string $name
     * @param null|string $param
     * @param null|string $alt_definitions
     * @param int $depth
     * @param bool $groups
     *
     * @return null|ExtractorDefinitionInterface
     * @throws ExtractorDefinitionBuilderException
     */
    protected function buildExtractor(string $name, string $param, string $alt_definitions, int $depth, bool $groups): ExtractorDefinitionInterface
    {
        $next = null;

        if ('' !== $param && preg_match($this->type_regexp, $param, $matches)) {
            $next = $this->buildExtractor($matches['name'], $matches['param'] ?? '', $matches['alt'] ?? '', $this->getDepth($matches), $this->hasGroups($matches));
        }

        if ($name) {
            $definition = $this->buildPlainExtractor($name, $next);
        } else {
            $definition = $next;
        }

        if ($depth > 0) {
            $definition = $this->buildArrayDefinition($definition, $depth, $groups);
        }

        if (!$definition) {
            throw new ExtractorDefinitionBuilderException('Empty group is not allowed');
        }

        if ('' !== $alt_definitions) {
            $definition = $this->buildVariableDefinition($definition, $alt_definitions);

        }

        return $definition;
    }

    /**
     * @param PlainExtractorDefinitionInterface $definition
     * @param string $alt_definitions
     *
     * @return VariableExtractorDefinition
     * @throws ExtractorDefinitionBuilderException
     */
    protected function buildVariableDefinition(PlainExtractorDefinitionInterface $definition, string $alt_definitions): VariableExtractorDefinition
    {
        $alt = [$definition];

        while ('' !== $alt_definitions && preg_match($this->type_regexp, $alt_definitions, $matches)) {
            // build alt
            $alt[] = $this->buildExtractor($matches['name'], $matches['param'] ?? '', '', $this->getDepth($matches), $this->hasGroups($matches));

            $alt_definitions = trim($matches['alt'] ?? '');
        }

        if ('' !== $alt_definitions) {
            // UNEXPECTED
            // this should not be possible, but just in case we will ever get here
            throw new ExtractorDefinitionBuilderException('Invalid varying definition');
        }

        return new VariableExtractorDefinition(...$alt);
    }

    /**
     * @param null|ExtractorDefinitionInterface $definition
     * @param int $depth
     * @param bool $groups
     *
     * @return ExtractorDefinitionInterface
     * @throws ExtractorDefinitionBuilderException
     */
    protected function buildArrayDefinition(?ExtractorDefinitionInterface $definition, int $depth, bool $groups): ExtractorDefinitionInterface
    {
        // special case for blank brackets [] which should be the same as any[]
        if (!$definition) {
            if ($groups) {
                throw new ExtractorDefinitionBuilderException('Empty group is not allowed');
            }

            $definition = $this->buildPlainExtractor('any');
        }

        while ($depth) {
            $depth--;
            // arrayed definition
            $definition = $this->buildPlainExtractor('[]', $definition);
        }

        return $definition;
    }

    private function getDepth(array $matches): int
    {
        if (!isset($matches['arr']) || '' === $matches['arr']) {
            return 0;
        }

        return substr_count($matches['arr'], '[');
    }

    private function hasGroups(array $matches): bool
    {
        return isset($matches['group']) && '' !== $matches['group'];
    }

    private function buildPlainExtractor(string $name, ?ExtractorDefinitionInterface $next = null): PlainExtractorDefinitionInterface
    {
        if ('any' === $name && !$next) {
            return new RecursiveExtractorDefinition($name);
        }

        return new PlainExtractorDefinition($name, $next);
    }
}


1		<?php declare(strict_types=1);
2
3		/*
4		* This file is part of the pinepain/js-sandbox PHP library.
5		*
6		* Copyright (c) 2016-2017 Bogdan Padalko <[email protected]>
7		*
8		* Licensed under the MIT license: http://opensource.org/licenses/MIT
9		*
10		* For the full copyright and license information, please view the
11		* LICENSE file that was distributed with this source or visit
12		* http://opensource.org/licenses/MIT
13		*/
14
15
16		namespace Pinepain\JsSandbox\Extractors;
17
18
19		use Pinepain\JsSandbox\Extractors\Definition\ExtractorDefinitionInterface;
20		use Pinepain\JsSandbox\Extractors\Definition\PlainExtractorDefinition;
21		use Pinepain\JsSandbox\Extractors\Definition\PlainExtractorDefinitionInterface;
22		use Pinepain\JsSandbox\Extractors\Definition\RecursiveExtractorDefinition;
23		use Pinepain\JsSandbox\Extractors\Definition\VariableExtractorDefinition;
24
25
26		class ExtractorDefinitionBuilder implements ExtractorDefinitionBuilderInterface
27		{
28		/**
29		* @var string
30		*/
31		protected $type_regexp = '/
32		^
33		(
34		(?<name>
35		[-_\w]*
36		)
37		(?:
38		\s*
39		(?<group>
40		\(
41		\s*
42		(?<param>
43		(?-4)*
44		\|
45		[\w\\\\]+
46		)
47		\s*
48		\)
49		)
50		)?
51		(?:
52		\s*
53		(?<arr>(?:\s\[\s\]\s*)+)
54		)?
55		(?:
56		\s*
57		\\|
58		\s*
59		(?<alt>(?-6))
60		)?
61		)
62		$
63		/xi';
64
65		/**
66		* {@inheritdoc}
67		*/
68	20	public function build(string $definition): ExtractorDefinitionInterface
69		{
70	20	$definition = trim($definition);
71
72	20	if (!$definition) {
73	1	throw new ExtractorDefinitionBuilderException('Definition must be non-empty string');
74		}
75
76		try {
77	19	if (preg_match($this->type_regexp, $definition, $matches)) {
78	18	$extractor = $this->buildExtractor($matches['name'], $matches['param'] ?? '', $matches['alt'] ?? '', $this->getDepth($matches), $this->hasGroups($matches));
79
80	16	return $extractor;
81		}
82	3	} catch (ExtractorDefinitionBuilderException $e) {
83		// We don't care about what specific issue we hit inside,
84		// for API user it means that the definition is invalid
85		}
86
87	4	throw new ExtractorDefinitionBuilderException("Unable to parse definition: '{$definition}'");
88		}
89
90		/**
91		* @param string $name
92		* @param null\|string $param
93		* @param null\|string $alt_definitions
94		* @param int $depth
95		* @param bool $groups
96		*
97		* @return null\|ExtractorDefinitionInterface
98		* @throws ExtractorDefinitionBuilderException
99		*/
100	18	protected function buildExtractor(string $name, string $param, string $alt_definitions, int $depth, bool $groups): ExtractorDefinitionInterface
101		{
102	18	$next = null;
103
104	18	if ('' !== $param && preg_match($this->type_regexp, $param, $matches)) {
105	10	$next = $this->buildExtractor($matches['name'], $matches['param'] ?? '', $matches['alt'] ?? '', $this->getDepth($matches), $this->hasGroups($matches));
106		}
107
108	18	if ($name) {
109	13	$definition = $this->buildPlainExtractor($name, $next);
110		} else {
111	11	$definition = $next;
112		}
113
114	18	if ($depth > 0) {
115	6	$definition = $this->buildArrayDefinition($definition, $depth, $groups);
116		}
117
118	17	if (!$definition) {
119	2	throw new ExtractorDefinitionBuilderException('Empty group is not allowed');
120		}
121
122	15	if ('' !== $alt_definitions) {
123	6	$definition = $this->buildVariableDefinition($definition, $alt_definitions);
		0 ignored issues – show Compatibility introduced 2017-11-04 17:34 UTC by Report Bug Copy Issue Report `$definition` of type `object<Pinepain\JsSandbo...torDefinitionInterface>` is not a sub-type of `object<Pinepain\JsSandbo...torDefinitionInterface>`. It seems like you assume a child interface of the interface `Pinepain\JsSandbox\Extra...ctorDefinitionInterface` to be always present. This check looks for parameters that are defined as one type in their type hint or doc comment but seem to be used as a narrower type, i.e an implementation of an interface or a subclass. Consider changing the type of the parameter or doing an instanceof check before assuming your parameter is of the expected type. Loading history...
124		}
125
126	15	return $definition;
127		}
128
129		/**
130		* @param PlainExtractorDefinitionInterface $definition
131		* @param string $alt_definitions
132		*
133		* @return VariableExtractorDefinition
134		* @throws ExtractorDefinitionBuilderException
135		*/
136	6	protected function buildVariableDefinition(PlainExtractorDefinitionInterface $definition, string $alt_definitions): VariableExtractorDefinition
137		{
138	6	$alt = [$definition];
139
140	6	while ('' !== $alt_definitions && preg_match($this->type_regexp, $alt_definitions, $matches)) {
141		// build alt
142	6	$alt[] = $this->buildExtractor($matches['name'], $matches['param'] ?? '', '', $this->getDepth($matches), $this->hasGroups($matches));
143
144	6	$alt_definitions = trim($matches['alt'] ?? '');
145		}
146
147	6	if ('' !== $alt_definitions) {
148		// UNEXPECTED
149		// this should not be possible, but just in case we will ever get here
150		throw new ExtractorDefinitionBuilderException('Invalid varying definition');
151		}
152
153	6	return new VariableExtractorDefinition(...$alt);
154		}
155
156		/**
157		* @param null\|ExtractorDefinitionInterface $definition
158		* @param int $depth
159		* @param bool $groups
160		*
161		* @return ExtractorDefinitionInterface
162		* @throws ExtractorDefinitionBuilderException
163		*/
164	6	protected function buildArrayDefinition(?ExtractorDefinitionInterface $definition, int $depth, bool $groups): ExtractorDefinitionInterface
165		{
166		// special case for blank brackets [] which should be the same as any[]
167	6	if (!$definition) {
168	3	if ($groups) {
169	1	throw new ExtractorDefinitionBuilderException('Empty group is not allowed');
170		}
171
172	2	$definition = $this->buildPlainExtractor('any');
173		}
174
175	5	while ($depth) {
176	5	$depth--;
177		// arrayed definition
178	5	$definition = $this->buildPlainExtractor('[]', $definition);
179		}
180
181	5	return $definition;
182		}
183
184	18	private function getDepth(array $matches): int
185		{
186	18	if (!isset($matches['arr']) \|\| '' === $matches['arr']) {
187	14	return 0;
188		}
189
190	7	return substr_count($matches['arr'], '[');
191		}
192
193	18	private function hasGroups(array $matches): bool
194		{
195	18	return isset($matches['group']) && '' !== $matches['group'];
196		}
197
198	15	private function buildPlainExtractor(string $name, ?ExtractorDefinitionInterface $next = null): PlainExtractorDefinitionInterface
199		{
200	15	if ('any' === $name && !$next) {
201	2	return new RecursiveExtractorDefinition($name);
202		}
203
204	15	return new PlainExtractorDefinition($name, $next);
205		}
206		}
207

pinepain / js-sandbox

Push — master ( 344583...2d30d0 )

ExtractorDefinitionBuilder::buildExtractor() C

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