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<?php |
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declare(strict_types=1); |
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4
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namespace ReadModel\Walker; |
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5
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class EmbedWalker implements ResultWalker |
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{ |
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/** @var array */ |
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private $prefixes; |
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/** |
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* @param string[] $prefixes Prefixes to embed, eg: for 'address' prefix: |
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* [id => 5, address_street = 'Sesame', 'address_number' = 4] |
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* will be turned into: |
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* [id => 5, address => [street = 'Sesame', 'number' = 4]] |
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*/ |
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public function __construct(string ...$prefixes) |
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{ |
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$this->prefixes = $prefixes; |
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} |
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public function walk(array $result): array |
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{ |
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foreach ($this->prefixes as $prefix) { |
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$result = $this->embed($prefix, $result); |
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} |
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return $result; |
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} |
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private function embed(string $prefix, array $result): array |
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{ |
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// filter out prefixed fields |
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$prefixed = array_filter($result, function ($key) use ($prefix) { |
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return strpos($key, $prefix) === 0; |
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}, ARRAY_FILTER_USE_KEY); |
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// remove filtered out fields from result |
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foreach (array_keys($prefixed) as $key) { |
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unset($result[$key]); |
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} |
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// remove prefix from field's name |
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$keys = array_map(function ($key) use ($prefix) { |
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return substr($key, strlen($prefix.'_')); |
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}, array_keys($prefixed)); |
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// add new field to the result |
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if (empty(array_filter($prefixed))) { |
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$result[$prefix] = null; |
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} else { |
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$result[$prefix] = array_combine($keys, $prefixed); |
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} |
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return $result; |
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} |
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} |
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tomaszhanc /
cqrs-lite-read-model
