LinkParserHelper::manuallyParseLinkDestination() - Code Metrics - Inspection of "Add tests for LinkParserHelper" - thephpleague/commonmark - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — 1.1 ( 9b1fd3 )

by Colin

created 2020-01-16 01:05 UTC

LinkParserHelper::manuallyParseLinkDestination() C

↳ Parent: LinkParserHelper

Complexity

Conditions	12
Paths	21

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	41
rs	6.9666
c	0
b	0
f	0
cc	12
nc	21
nop	1

How to fix Complexity

<?php

/*
 * This file is part of the league/commonmark package.
 *
 * (c) Colin O'Dell <[email protected]>
 *
 * Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
 *  - (c) John MacFarlane
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace League\CommonMark\Util;

use League\CommonMark\Cursor;

final class LinkParserHelper
{
    /**
     * Attempt to parse link destination
     *
     * @param Cursor $cursor
     *
     * @return null|string The string, or null if no match
     */
    public static function parseLinkDestination(Cursor $cursor): ?string
    {
        if ($res = $cursor->match(RegexHelper::REGEX_LINK_DESTINATION_BRACES)) {
            // Chop off surrounding <..>:
            return UrlEncoder::unescapeAndEncode(
                RegexHelper::unescape(\substr($res, 1, -1))
            );
        }

        if ($cursor->getCharacter() === '<') {
            return null;
        }

        $destination = self::manuallyParseLinkDestination($cursor);
        if ($destination === null) {
            return null;
        }

        return UrlEncoder::unescapeAndEncode(
            RegexHelper::unescape($destination)
        );
    }

    /**
     * @param Cursor $cursor
     *
     * @return int
     */
    public static function parseLinkLabel(Cursor $cursor): int
    {
        $match = $cursor->match('/^\[(?:[^\\\\\[\]]|\\\\.){0,1000}\]/');
        if ($match === null) {
            return 0;
        }

        $length = \mb_strlen($match, 'utf-8');

        if ($length > 1001) {
            return 0;
        }

        return $length;
    }

    /**
     * Attempt to parse link title (sans quotes)
     *
     * @param Cursor $cursor
     *
     * @return null|string The string, or null if no match
     */
    public static function parseLinkTitle(Cursor $cursor): ?string
    {
        if ($title = $cursor->match('/' . RegexHelper::PARTIAL_LINK_TITLE . '/')) {
            // Chop off quotes from title and unescape
            return RegexHelper::unescape(\substr($title, 1, -1));
        }

        return null;
    }

    /**
     * @param Cursor $cursor
     *
     * @return string|null
     */
    private static function manuallyParseLinkDestination(Cursor $cursor): ?string
    {
        $oldPosition = $cursor->getPosition();
        $oldState = $cursor->saveState();

        $openParens = 0;
        while (($c = $cursor->getCharacter()) !== null) {
            if ($c === '\\' && $cursor->peek() !== null && RegexHelper::isEscapable($cursor->peek())) {
                $cursor->advanceBy(2);
            } elseif ($c === '(') {
                $cursor->advance();
                $openParens++;
            } elseif ($c === ')') {
                if ($openParens < 1) {
                    break;
                }

                $cursor->advance();
                $openParens--;
            } elseif (\preg_match(RegexHelper::REGEX_WHITESPACE_CHAR, $c)) {
                break;
            } else {
                $cursor->advance();
            }
        }

        if ($openParens !== 0) {
            return null;
        }

        if ($cursor->getPosition() === $oldPosition && $c !== ')') {
            return null;
        }

        $newPos = $cursor->getPosition();
        $cursor->restoreState($oldState);

        $cursor->advanceBy($newPos - $cursor->getPosition());

        return $cursor->getPreviousText();
    }
}


1			<?php
2
3			/*
4			* This file is part of the league/commonmark package.
5			*
6			* (c) Colin O'Dell <[email protected]>
7			*
8			* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
9			* - (c) John MacFarlane
10			*
11			* For the full copyright and license information, please view the LICENSE
12			* file that was distributed with this source code.
13			*/
14
15			namespace League\CommonMark\Util;
16
17			use League\CommonMark\Cursor;
18
19			final class LinkParserHelper
20			{
21			/**
22			* Attempt to parse link destination
23			*
24			* @param Cursor $cursor
25			*
26			* @return null\|string The string, or null if no match
27			*/
28			public static function parseLinkDestination(Cursor $cursor): ?string
29			{
30			if ($res = $cursor->match(RegexHelper::REGEX_LINK_DESTINATION_BRACES)) {
31			// Chop off surrounding <..>:
32			return UrlEncoder::unescapeAndEncode(
33			RegexHelper::unescape(\substr($res, 1, -1))
34			);
35			}
36
37			if ($cursor->getCharacter() === '<') {
38			return null;
39			}
40
41			$destination = self::manuallyParseLinkDestination($cursor);
42			if ($destination === null) {
43			return null;
44			}
45
46			return UrlEncoder::unescapeAndEncode(
47			RegexHelper::unescape($destination)
48			);
49			}
50
51			/**
52			* @param Cursor $cursor
53			*
54			* @return int
55			*/
56			public static function parseLinkLabel(Cursor $cursor): int
57			{
58			$match = $cursor->match('/^\[(?:[^\\\\\[\]]\|\\\\.){0,1000}\]/');
59			if ($match === null) {
60			return 0;
61			}
62
63			$length = \mb_strlen($match, 'utf-8');
64
65			if ($length > 1001) {
66			return 0;
67			}
68
69			return $length;
70			}
71
72			/**
73			* Attempt to parse link title (sans quotes)
74			*
75			* @param Cursor $cursor
76			*
77			* @return null\|string The string, or null if no match
78			*/
79			public static function parseLinkTitle(Cursor $cursor): ?string
80			{
81			if ($title = $cursor->match('/' . RegexHelper::PARTIAL_LINK_TITLE . '/')) {
82			// Chop off quotes from title and unescape
83			return RegexHelper::unescape(\substr($title, 1, -1));
84			}
85
86			return null;
87			}
88
89			/**
90			* @param Cursor $cursor
91			*
92			* @return string\|null
93			*/
94			private static function manuallyParseLinkDestination(Cursor $cursor): ?string
95			{
96			$oldPosition = $cursor->getPosition();
97			$oldState = $cursor->saveState();
98
99			$openParens = 0;
100			while (($c = $cursor->getCharacter()) !== null) {
101			if ($c === '\\' && $cursor->peek() !== null && RegexHelper::isEscapable($cursor->peek())) {
102			$cursor->advanceBy(2);
103			} elseif ($c === '(') {
104			$cursor->advance();
105			$openParens++;
106			} elseif ($c === ')') {
107			if ($openParens < 1) {
108			break;
109			}
110
111			$cursor->advance();
112			$openParens--;
113			} elseif (\preg_match(RegexHelper::REGEX_WHITESPACE_CHAR, $c)) {
114			break;
115			} else {
116			$cursor->advance();
117			}
118			}
119
120			if ($openParens !== 0) {
121			return null;
122			}
123
124			if ($cursor->getPosition() === $oldPosition && $c !== ')') {
125			return null;
126			}
127
128			$newPos = $cursor->getPosition();
129			$cursor->restoreState($oldState);
130
131			$cursor->advanceBy($newPos - $cursor->getPosition());
132
133			return $cursor->getPreviousText();
134			}
135			}
136

thephpleague / commonmark

Push — 1.1 ( 9b1fd3 )

LinkParserHelper::manuallyParseLinkDestination() C

Complexity

Size

Duplication

Importance

How to fix Complexity

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