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1<?php
2namespace Apie\Serializer\Relations;
3
4final class ChainedRelation implements EmbedRelationInterface
5{
6    /** @var array<int, EmbedRelationInterface> */
7    private array $filters;
8
9    public function __construct(EmbedRelationInterface... $filters)
10    {
11        $this->filters = $filters;
12    }
13    public function hasEmbeddedRelation(): bool
14    {
15        foreach ($this->filters as $filter) {
16            if ($filter->hasEmbeddedRelation()) {
17                return true;
18            }
19        }
20
21        return false;
22    }
23
24    public function followField(string $fieldName): EmbedRelationInterface
25    {
26        if ($fieldName === 'id') {
27            return new NoRelationEmbedded();
28        }
29        $list = [];
30        foreach ($this->filters as $filter) {
31            $list[] = $filter->followField($fieldName);
32        }
33
34        $list = array_filter(
35            $list,
36            function (EmbedRelationInterface $filter) {
37                return !($filter instanceof NoRelationEmbedded);
38            }
39        );
40
41        if (empty($list)) {
42            return new NoRelationEmbedded();
43        }
44        if (count($list) === 1) {
45            return reset($list);
46        }
47        return new ChainedRelation(...$list);
48    }
49}