public function discoveryQuery(NodeInterface $input)
{
$query = 'MATCH (n) WHERE id(n) = {id}
MATCH (n)-[:CONTRIBUTED_TO]->(repo)<-[:CONTRIBUTED_TO]-(reco)
RETURN reco, count(*) as score';
return Statement::create($query, ['id' => $input->identity()]);
}
public function blacklistQuery(NodeInterface $input)
{
$query = 'MATCH (input) WHERE id(input) = {inputId}
MATCH (input)-[:RATED]->(movie)
RETURN movie as item';
return Statement::create($query, ['inputId' => $input->identity()]);
}
public function prepareQuery(NodeInterface $input, Recommendation $recommendation, CypherAwarePostProcessor $postProcessor)
{
$query = 'MATCH (input), (reco) WHERE id(input) = {idInput} AND id(reco) = {idReco}' . PHP_EOL;
$query .= $postProcessor->query();
$parameters = ['idInput' => $input->identity(), 'idReco' => $recommendation->item()->identity()];
$tag = sprintf('post_process_%s_%d', $postProcessor->name(), $recommendation->item()->identity());
$this->stack->push($query, $parameters, $tag);
}
/**
* @param \GraphAware\Common\Type\NodeInterface $item
*
* @return \GraphAware\Reco4PHP\Result\Recommendation
*/
public function getOrCreate(NodeInterface $item)
{
if (array_key_exists($item->identity(), $this->recommendations)) {
return $this->recommendations[$item->identity()];
}
$recommendation = new Recommendation($item);
$this->recommendations[$item->identity()] = $recommendation;
return $recommendation;
}
public function discoveryQuery(NodeInterface $input)
{
$query = 'MATCH (input) WHERE id(input) = {id}
MATCH (input)<-[:FOLLOWS]-(follower)-[:FOLLOWS]->(reco)
WHERE size((follower)-[:FOLLOWS]->()) < {max_follows}
RETURN reco, count(*) as score
LIMIT 100';
return Statement::create($query, ['id' => $input->identity(), 'max_follows' => 200]);
}
public final function buildQuery(NodeInterface $input, Recommendation $recommendation)
{
$relationshipPatterns = [Direction::BOTH => array('-[:%s]-', '-[:%s]-'), Direction::INCOMING => array('<-[:%s]-', '-[:%s]->'), Direction::OUTGOING => array('-[:%s]->', '<-[:%s]-')];
$relPattern = sprintf($relationshipPatterns[$this->relationshipDirection()][0], $this->relationshipType());
$inversedRelPattern = sprintf($relationshipPatterns[$this->relationshipDirection()][1], $this->relationshipType());
$query = 'MATCH (input) WHERE id(input) = {inputId}, (item) WHERE id(item) = {itemId}
MATCH (input)' . $relPattern . '(shared)' . $inversedRelPattern . '(item)
RETURN shared as sharedThing';
return Statement::create($query, ['inputId' => $input->identity(), 'itemId' => $recommendation->item()->identity()]);
}
public function discoveryQuery(NodeInterface $input)
{
$query = 'MATCH (input:User) WHERE id(input) = {id}
MATCH (input)-[:RATED]->(movie)<-[:RATED]-(other)
WITH distinct other
MATCH (other)-[:RATED]->(reco)
RETURN reco, count(*) as score
ORDER BY score DESC
LIMIT 200';
return Statement::create($query, ['id' => $input->identity()]);
}
public function doInclude(NodeInterface $input, NodeInterface $item)
{
$title = $item->value("title");
preg_match('/(?:\\()\\d+(?:\\))/', $title, $matches);
if (isset($matches[0])) {
$y = str_replace('(', '', $matches[0]);
$y = str_replace(')', '', $y);
$year = (int) $y;
if ($year < 1999) {
return false;
}
return true;
}
return false;
}
/**
* @param \GraphAware\Common\Type\NodeInterface $node
*
* @return bool
*/
public function contains(NodeInterface $node)
{
return array_key_exists($node->identity(), $this->elements);
}
public final function buildParams(NodeInterface $input)
{
$this->query();
$this->addParameter($this->idParamName(), $input->identity());
}
public function discoveryQuery(NodeInterface $input)
{
$query = "MATCH (n) WHERE id(n) <> {inputId} RETURN n";
return Statement::create($query, ['inputId' => $input->identity()]);
}
public function discoveryQuery(NodeInterface $input)
{
$query = "MATCH (n) WHERE id(n) <> {input}\n RETURN n LIMIT {limit}";
return Statement::create($query, ['input' => $input->identity(), 'limit' => 300]);
}
public function doInclude(NodeInterface $input, NodeInterface $item)
{
return $input->identity() !== $item->identity();
}