public function removeIrrelevant(NodeInterface $input, RecommendationEngine $engine, Recommendations $recommendations)
{
foreach ($recommendations->getItems() as $recommendation) {
foreach ($engine->filters() as $filter) {
if (!$filter->doInclude($input, $recommendation->item())) {
$recommendations->remove($recommendation);
}
}
}
}
private function buildBlacklistedNodes(ResultCollection $result, RecommendationEngine $engine)
{
$set = [];
foreach ($engine->getBlacklistBuilders() as $blacklist) {
$res = $result->get($blacklist->name());
foreach ($res->records() as $record) {
if ($record->hasValue($blacklist->itemResultName())) {
$node = $record->get($blacklist->itemResultName());
if ($node instanceof Node) {
$set[$node->identity()] = $node;
}
}
}
}
return $set;
}
public function execute(NodeInterface $input, Recommendations $recommendations, RecommendationEngine $recommendationEngine)
{
$this->stack = $this->databaseService->getDriver()->stack('post_process_' . $recommendationEngine->name());
foreach ($recommendationEngine->postProcessors() as $postProcessor) {
if ($postProcessor instanceof CypherAwarePostProcessor) {
foreach ($recommendations->getItems() as $recommendation) {
$this->prepareQuery($input, $recommendation, $postProcessor);
}
}
}
try {
$results = $this->databaseService->getDriver()->runStack($this->stack);
$this->stack = null;
return $results;
} catch (\Exception $e) {
throw new \RuntimeException('PostProcess Query Exception - ' . $e->getMessage());
}
}
/**
* @param \GraphAware\Common\Type\NodeInterface $input
* @param \GraphAware\Reco4PHP\Result\Recommendations $recommendations
* @param \GraphAware\Reco4PHP\Engine\RecommendationEngine $recommendationEngine
*
* @return \GraphAware\Common\Result\ResultCollection
*/
public function execute(NodeInterface $input, Recommendations $recommendations, RecommendationEngine $recommendationEngine)
{
$stack = $this->databaseService->getDriver()->stack('post_process_' . $recommendationEngine->name());
foreach ($recommendationEngine->postProcessors() as $postProcessor) {
if ($postProcessor instanceof CypherAwarePostProcessor) {
foreach ($recommendations->getItems() as $recommendation) {
$tag = sprintf('post_process_%s_%d', $postProcessor->name(), $recommendation->item()->identity());
$statement = $postProcessor->buildQuery($input, $recommendation);
$stack->push($statement->text(), $statement->parameters(), $tag);
}
}
}
try {
$results = $this->databaseService->getDriver()->runStack($stack);
return $results;
} catch (\Exception $e) {
throw new \RuntimeException('PostProcess Query Exception - ' . $e->getMessage());
}
}
/**
* @param \GraphAware\Reco4PHP\Engine\RecommendationEngine $recommendationEngine
*/
public function registerRecommendationEngine(RecommendationEngine $recommendationEngine)
{
$recommendationEngine->setDatabaseService($this->databaseService);
$this->engines[$recommendationEngine->name()] = $recommendationEngine;
}