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<?php |
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namespace Roromedia\Parsedown; |
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use Roromedia\Parsedown\Helper\Arr; |
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use ParsedownExtra; |
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use Symfony\Component\String\UnicodeString; |
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class Parsedown extends ParsedownExtra { |
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public function text($text): string { |
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$text = parent::text($text); |
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$lines = $this->explodeInLines($text); |
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foreach ($lines as $number => $line) { |
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$this->injectIdIntoHeadlineIfValid($line, $text, $lines, $number); |
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} |
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return $this->implodeLines($lines); |
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} |
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private function getMenulinks(string $text): array { |
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$lines = $this->explodeInLines($text); |
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return array_map( |
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fn(string $line) => $this->getNameOfHeadline($line), |
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array_filter($lines, fn(string $line) => $this->getNameOfHeadline($line)) |
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); |
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} |
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private function implodeLines(array $lines): string { |
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return implode("\n", $lines); |
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} |
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private function getNameOfHeadline(string $line): string|null { |
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preg_match('/<li><a href="(.+)">/', $line, $matches); |
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return $matches[1] ?? NULL; |
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} |
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private function explodeInLines(string|null $text): array { |
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return $text ? explode("\n", $text) : []; |
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} |
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private function isHeadline(string $line): bool { |
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return (new UnicodeString($line))->startsWith('<h'); |
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} |
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private static function normalizeName(string $name): string { |
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return substr($name, 1); |
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} |
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private static function extractHeadlineNameFromLine(string $line): string { |
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return strtolower(str_replace('_', '-', ltrim(rtrim(preg_replace('/\W/', '_', substr($line, 4, -5)), '_'), '_'))); |
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} |
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private function headlineContainsOneOf(string $line, array $menulinks): string|bool { |
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$result = array_filter($menulinks, fn(string $link) => static::headlineContainsName($line, $link)); |
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return !empty($result) ? static::normalizeName(Arr::firstValue($result)) : FALSE; |
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} |
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private static function headlineContainsName(string $line, $name): bool { |
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return static::extractHeadlineNameFromLine($line) === static::normalizeName($name); |
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} |
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private function injectIdIntoHeadline(string $line, bool|string $name, array &$lines, int|string $number): void { |
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$lines[$number] = substr_replace($line, sprintf(' id="%s"', $name), 3, 0); |
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} |
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private function isValidHeadline(mixed $line, string $text): bool { |
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return $this->isHeadline($line) && $this->headlineContainsOneOf($line, $this->getMenulinks($text)); |
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} |
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private function getMenulinkName(string $line, string $text): bool|string { |
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return $this->headlineContainsOneOf($line, $this->getMenulinks($text)); |
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} |
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private function injectIdIntoHeadlineIfValid(mixed $line, string $text, array &$lines, int|string $number): void { |
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$this->isValidHeadline($line, $text) && $this->injectIdIntoHeadline($line, $this->getMenulinkName($line, $text), $lines, $number); |
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} |
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} |
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Roromedia-GmbH /
parsedown
