1 | <?php |
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2 | |||
3 | namespace Lneicelis\Transformer; |
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4 | |||
5 | use Lneicelis\Transformer\Exception\TransformerNotFoundException; |
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6 | use Lneicelis\Transformer\Helper\Arr; |
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7 | use Lneicelis\Transformer\ValueObject\Context; |
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8 | use Lneicelis\Transformer\ValueObject\Deferred; |
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9 | use Lneicelis\Transformer\ValueObject\Path; |
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10 | |||
11 | class DeferredAwareTransformer extends Transformer |
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12 | { |
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13 | /** @var array[] */ |
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14 | private $deferredTree = []; |
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15 | |||
16 | /** @var LoaderRegistry */ |
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17 | private $loaderRegistry; |
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18 | |||
19 | 2 | public function __construct(array $pipes, LoaderRegistry $loaderRegistry) |
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20 | { |
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21 | 2 | parent::__construct($pipes); |
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22 | |||
23 | 2 | $this->loaderRegistry = $loaderRegistry; |
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24 | 2 | } |
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25 | |||
26 | /** |
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27 | * @param mixed $resource |
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28 | * @param Context|null $context |
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29 | * @return string|int|float|array |
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30 | * @throws TransformerNotFoundException |
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31 | */ |
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32 | 2 | public function transform($resource, Context $context = null) |
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33 | { |
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34 | 2 | $context = $context ?: new Context(); |
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35 | |||
36 | 2 | $result = parent::transform($resource, $context); |
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37 | 2 | $result = $this->loadDeferred($result, $context); |
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38 | |||
39 | 2 | return $result; |
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40 | } |
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41 | |||
42 | /** |
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43 | * @param $deferred |
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44 | * @param Context $context |
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45 | * @param Path $path |
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46 | * @return array|float|int|string |
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47 | * @throws TransformerNotFoundException |
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48 | */ |
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49 | 2 | protected function transformAny($deferred, Context $context, Path $path) |
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50 | { |
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51 | 2 | if (! $deferred instanceof Deferred) { |
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52 | 2 | return parent::transformAny($deferred, $context, $path); |
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53 | } |
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54 | |||
55 | 2 | $resource = $deferred->getResource(); |
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56 | 2 | $property = $deferred->getProperty(); |
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57 | 2 | $resourceClass = get_class($resource); |
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58 | |||
59 | 2 | $this->deferredTree = Arr::setValue($this->deferredTree, [$resourceClass, $property, (string)$path], $deferred); |
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60 | |||
61 | 2 | return null; |
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62 | } |
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63 | |||
64 | /** |
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65 | * @param array $result |
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66 | * @param Context $context |
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67 | * @return array |
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68 | * @throws TransformerNotFoundException |
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69 | */ |
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70 | 2 | protected function loadDeferred(array $result, Context $context): array |
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71 | { |
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72 | 2 | foreach ($this->deferredTree as $resourceClass => $properties) { |
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73 | 2 | unset($this->deferredTree[$resourceClass]); |
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74 | |||
75 | 2 | foreach ($properties as $property => $deferredByPath) { |
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76 | 2 | $loader = $this->loaderRegistry->getLoader($resourceClass, $property); |
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77 | 2 | $paths = array_keys($deferredByPath); |
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78 | 2 | $deferreds = array_values($deferredByPath); |
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79 | |||
80 | 2 | $loadedValues = $loader->load($deferreds); |
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81 | |||
82 | 2 | foreach ($paths as $index => $path) { |
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83 | 2 | $segments = explode('.', $path); |
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84 | 2 | $path = new Path($segments); |
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85 | 2 | $value = $this->transformAny($loadedValues[$index], $context, $path); |
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86 | |||
87 | 2 | $result = Arr::setValue($result, $segments, $value); |
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88 | } |
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89 | } |
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90 | } |
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91 | |||
92 | 2 | if (! empty($this->deferredTree)) { |
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93 | 1 | return $this->loadDeferred($result, $context); |
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94 | } |
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95 | |||
96 | 2 | return $result; |
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97 | } |
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98 | } |
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99 |