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<?php
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declare(strict_types=1);
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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 <colinodell@gmail.com>
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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\Extension\Mention;
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use League\CommonMark\Extension\Mention\Generator\CallbackGenerator;
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use League\CommonMark\Extension\Mention\Generator\MentionGeneratorInterface;
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use League\CommonMark\Extension\Mention\Generator\StringTemplateLinkGenerator;
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use League\CommonMark\Parser\Inline\InlineParserInterface;
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use League\CommonMark\Parser\Inline\InlineParserMatch;
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use League\CommonMark\Parser\InlineParserContext;
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final class MentionParser implements InlineParserInterface
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{
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/** @psalm-readonly */
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private string $name;
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/** @psalm-readonly */
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private string $prefix;
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/** @psalm-readonly */
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private string $identifierPattern;
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/** @psalm-readonly */
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private MentionGeneratorInterface $mentionGenerator;
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public function __construct(string $name, string $prefix, string $identifierPattern, MentionGeneratorInterface $mentionGenerator)
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{
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$this->name = $name;
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$this->prefix = $prefix;
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$this->identifierPattern = $identifierPattern;
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$this->mentionGenerator = $mentionGenerator;
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}
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public function getMatchDefinition(): InlineParserMatch
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{
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return InlineParserMatch::join(
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InlineParserMatch::string($this->prefix),
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InlineParserMatch::regex($this->identifierPattern)
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);
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}
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public function parse(InlineParserContext $inlineContext): bool
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{
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$cursor = $inlineContext->getCursor();
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// The prefix must not have any other characters immediately prior
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$previousChar = $cursor->peek(-1);
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if ($previousChar !== null && \preg_match('/\w/', $previousChar)) {
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// peek() doesn't modify the cursor, so no need to restore state first
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return false;
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}
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[$prefix, $identifier] = $inlineContext->getSubMatches();
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$mention = $this->mentionGenerator->generateMention(new Mention($this->name, $prefix, $identifier));
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if ($mention === null) {
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return false;
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}
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$cursor->advanceBy($inlineContext->getFullMatchLength());
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$inlineContext->getContainer()->appendChild($mention);
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return true;
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}
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public static function createWithStringTemplate(string $name, string $prefix, string $mentionRegex, string $urlTemplate): MentionParser
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{
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return new self($name, $prefix, $mentionRegex, new StringTemplateLinkGenerator($urlTemplate));
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}
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public static function createWithCallback(string $name, string $prefix, string $mentionRegex, callable $callback): MentionParser
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{
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return new self($name, $prefix, $mentionRegex, new CallbackGenerator($callback));
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}
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}
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