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by Colin
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created

LinkParserHelper::parseLinkDestination()   C

Complexity

Conditions 8
Paths 8

Duplication

Lines 0
Ratio 0 %

Size

Total Lines 42
Code Lines 27

Code Coverage

Tests 30
CRAP Score 8

Importance

Changes 2
Bugs 0 Features 0
Metric Value
c 2
b 0
f 0
dl 0
loc 42
ccs 30
cts 30
cp 1
rs 5.3846
cc 8
eloc 27
nc 8
nop 1
crap 8
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<?php
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/*
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 * This file is part of the league/commonmark package.
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 *
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 * (c) Colin O'Dell <[email protected]>
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 *
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 * Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js)
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 *  - (c) John MacFarlane
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace League\CommonMark\Util;
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use League\CommonMark\Cursor;
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class LinkParserHelper
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{
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    /**
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     * Attempt to parse link destination
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     *
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     * @param Cursor $cursor
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     *
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     * @return null|string The string, or null if no match
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     */
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    public static function parseLinkDestination(Cursor $cursor)
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    {
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        if ($res = $cursor->match(RegexHelper::getInstance()->getLinkDestinationBracesRegex())) {
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            // Chop off surrounding <..>:
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            return UrlEncoder::unescapeAndEncode(
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                RegexHelper::unescape(substr($res, 1, strlen($res) - 2))
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            );
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        }
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        $oldState = $cursor->saveState();
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        $openParens = 0;
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        while (($c = $cursor->getCharacter()) !== null) {
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            if ($c === '\\') {
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                $cursor->advanceBy(2);
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            } elseif ($c === '(') {
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                $cursor->advance();
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                $openParens++;
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            } elseif ($c === ')') {
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                if ($openParens < 1) {
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                    break;
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                }
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                $cursor->advance();
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                $openParens--;
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            } elseif (preg_match(RegexHelper::REGEX_WHITESPACE_CHAR, $c)) {
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                break;
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            } else {
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                $cursor->advance();
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            }
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        }
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        $newPos = $cursor->getPosition();
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        $cursor->restoreState($oldState);
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        $cursor->advanceBy($newPos - $cursor->getPosition());
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        $res = $cursor->getPreviousText();
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        return UrlEncoder::unescapeAndEncode(
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            RegexHelper::unescape($res)
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        );
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    }
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    /**
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     * @param Cursor $cursor
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     *
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     * @return int
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     */
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    public static function parseLinkLabel(Cursor $cursor)
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    {
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        $escapedChar = RegexHelper::getInstance()->getPartialRegex(RegexHelper::ESCAPED_CHAR);
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        $match = $cursor->match('/^\[(?:[^\\\\\[\]]|' . $escapedChar . '|\\\\)*\]/');
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        $length = mb_strlen($match, 'utf-8');
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        if ($match === null || $length > 1001 || preg_match('/[^\\\\]\\\\\]$/', $match)) {
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            return 0;
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        }
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        return $length;
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    }
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    /**
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     * Attempt to parse link title (sans quotes)
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     *
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     * @param Cursor $cursor
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     *
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     * @return null|string The string, or null if no match
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     */
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    public static function parseLinkTitle(Cursor $cursor)
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    {
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        if ($title = $cursor->match(RegexHelper::getInstance()->getLinkTitleRegex())) {
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            // Chop off quotes from title and unescape
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            return RegexHelper::unescape(substr($title, 1, strlen($title) - 2));
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        }
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    }
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}
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