| 1 | <?php |
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| 11 | { |
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| 12 | /** @var Era[] */ |
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| 13 | protected array $eras; |
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| 14 | |||
| 15 | /** |
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| 16 | * @return Era[] |
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| 17 | */ |
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| 18 | public function getEras(): array |
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| 19 | { |
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| 20 | return $this->eras; |
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| 21 | } |
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| 22 | |||
| 23 | /** |
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| 24 | * @return Book[] |
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| 25 | */ |
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| 26 | public function getBooksByEra(string $eraId): array |
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| 27 | { |
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| 28 | /** @var Book[] $books */ |
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| 29 | $books = array_filter($this->getBooks(), static function (Book $book) use ($eraId): bool { |
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| 30 | return $book->getChronologicalMarker()->getEra()->getId() === $eraId; |
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| 31 | }); |
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| 36 |