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<?php |
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declare(strict_types=1); |
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namespace PhpEpub\Traits; |
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use SimpleXMLElement; |
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trait InteractsWithAuthors |
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{ |
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private readonly SimpleXMLElement $opfXml; |
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private readonly string $dcNamespace; |
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/** |
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* Gets the authors of the EPUB. |
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* |
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* @return array<int, string> |
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*/ |
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public function getAuthors(): array |
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{ |
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$this->opfXml->registerXPathNamespace('dc', $this->dcNamespace); |
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$creatorNodes = $this->opfXml->xpath('//dc:creator'); |
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if ($this->isAuthorsNodeEmpty($creatorNodes)) { |
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return []; |
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} |
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$authors = []; |
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foreach ($creatorNodes as $creatorNode) { |
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$authors[] = (string) $creatorNode; |
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} |
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return $authors; |
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} |
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/** |
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* Sets the authors of the EPUB. |
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* |
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* @param array<int, string> $authors |
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*/ |
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public function setAuthors(array $authors): void |
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{ |
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$this->opfXml->registerXPathNamespace('dc', $this->dcNamespace); |
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$creatorNodes = $this->opfXml->xpath('//dc:creator'); |
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if (! $this->isAuthorsNodeEmpty($creatorNodes)) { |
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foreach ($creatorNodes as $key => $creatorNode) { |
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unset($creatorNodes[$key][0]); |
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} |
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} |
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foreach ($authors as $author) { |
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$this->opfXml->metadata->addChild('creator', $author, $this->dcNamespace); |
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} |
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} |
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/** |
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* @param array<SimpleXMLElement>|false|null $creatorNodes |
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* |
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* @phpstan-assert-if-false array<SimpleXMLElement> $creatorNodes |
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*/ |
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private function isAuthorsNodeEmpty(mixed $creatorNodes): bool |
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{ |
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if ($creatorNodes === false || $creatorNodes === null || $creatorNodes === []) { |
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return true; |
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} |
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return false; |
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} |
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} |
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indy2kro /
php-epub
