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<?php |
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namespace Matchish\ScoutElasticSearch\ElasticSearch; |
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use Illuminate\Database\Eloquent\Model; |
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use Laravel\Scout\Builder; |
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use Laravel\Scout\Searchable; |
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class HighlightedHitsIterator implements \IteratorAggregate |
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{ |
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/** |
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* @var array |
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*/ |
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private $results; |
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/** |
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* @var callable|null |
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*/ |
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private $callback; |
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public function __invoke(array $results, $callback = null) |
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{ |
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$this->results = $results; |
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$this->callback = $callback; |
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return $this; |
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} |
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/** |
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* Retrieve an external iterator. |
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* @link https://php.net/manual/en/iteratoraggregate.getiterator.php |
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* @return Traversable An instance of an object implementing <b>Iterator</b> or |
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* <b>Traversable</b> |
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* @since 5.0.0 |
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*/ |
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public function getIterator() |
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{ |
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$hits = collect(); |
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if ($this->results['hits']['total']) { |
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$raw = collect($this->results['hits']['hits']); |
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$models = $this->collectModels($raw); |
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$eloquentHits = $this->getEloquentHits($raw, $models); |
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$hits = $this->mergeHighlightsIntoModels($eloquentHits, $raw); |
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} |
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return new \ArrayIterator($hits); |
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} |
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private function collectModels($rawHits) |
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{ |
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return collect($rawHits) |
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->groupBy('_source.__class_name') |
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->map(function ($results, $class) { |
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$model = new $class; |
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$builder = new Builder($model, ''); |
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if (! empty($this->callback)) { |
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$builder->query($this->callback); |
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} |
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/* @var Searchable $model */ |
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return $models = $model->getScoutModelsByIds( |
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$builder, $results->pluck('_id')->all() |
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); |
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}) |
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->flatten() |
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->keyBy(function ($model) { |
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return get_class($model).'::'.$model->getScoutKey(); |
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}); |
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} |
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private function getEloquentHits($hits, $models) |
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{ |
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return collect($hits) |
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->map(function ($hit) use ($models) { |
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$key = $hit['_source']['__class_name'].'::'.$hit['_id']; |
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return isset($models[$key]) ? $models[$key] : null; |
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})->filter()->all(); |
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} |
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private function mergeHighlightsIntoModels($eloquentHits, $raw) |
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{ |
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return collect($eloquentHits) |
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->map(function (Model $eloquentHit) use ($raw) { |
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$raw = collect($raw) |
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->where('_source.__class_name', get_class($eloquentHit)) |
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->where('_source.id', $eloquentHit->id) |
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->first(); |
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foreach ($raw['highlight'] ?? [] as $key => $highlight) { |
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if(in_array($key, ['customer.name', 'billing_address.name', 'shipping_address.name'])){ |
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$key = 'name'; |
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} |
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if(in_array($key, ['customer.email', 'billing_address.email', 'shipping_address.email'])){ |
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$key = 'email'; |
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} |
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if (! in_array($key, ['created_at', 'updated_at'])) { |
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$eloquentHit->setAttribute($key, $highlight[0]); |
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} |
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} |
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return $eloquentHit; |
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})->all(); |
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} |
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} |