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<?php |
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namespace Arrilot\Collectors; |
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abstract class Collector |
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{ |
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/** |
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* Ids that are collected from sources. |
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* |
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* @var array |
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*/ |
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protected $ids = []; |
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/** |
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* Fields that should be selected. |
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* |
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* @var mixed |
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*/ |
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protected $select = null; |
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/** |
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* Additional filter. |
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* |
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* @var mixed |
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*/ |
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protected $where = null; |
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/** |
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* Data keyed by id. |
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* |
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* @var array |
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*/ |
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protected $data = []; |
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/** |
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* Get data for given ids. |
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* |
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* @param array $ids |
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* @return array |
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*/ |
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abstract protected function getList(array $ids); |
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/** |
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* Add a collection source. |
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* |
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* @param $collection |
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* @param mixed $fields |
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* @return $this |
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*/ |
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public function fromCollection($collection, $fields) |
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{ |
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$fields = (array) $fields; |
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foreach ($collection as $item) { |
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$this->collectIdsFromItem($item, $fields); |
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} |
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return $this; |
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} |
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/** |
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* Add an item source. |
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* |
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* @param $item |
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* @param mixed $fields |
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* @return $this |
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*/ |
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public function fromItem($item, $fields) |
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{ |
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$fields = (array) $fields; |
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$this->collectIdsFromItem($item, $fields); |
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return $this; |
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} |
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/** |
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* Setter for select. |
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* |
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* @param mixed $select |
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* @return $this |
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*/ |
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public function select($select) |
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{ |
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$this->select = $select; |
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return $this; |
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} |
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/** |
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* Setter for where. |
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* |
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* @param mixed $where |
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* @return $this |
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*/ |
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public function where($where) |
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{ |
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$this->where = $where; |
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return $this; |
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} |
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/** |
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* Perform main query. |
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* |
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* @return array |
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*/ |
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public function performQuery() |
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{ |
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if (!$this->ids) { |
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return []; |
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} |
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return $this->getList($this->getIdsWithoutDuplications()); |
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} |
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/** |
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* Collect ids from source and add them to $this->ids |
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* |
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* @param $item |
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* @param array $fields |
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*/ |
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protected function collectIdsFromItem($item, array $fields) |
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{ |
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foreach ($fields as $field) { |
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foreach ((array) $item[$field] as $id) { |
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if ((int) $id) { |
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$this->ids[] = (int) $id; |
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} |
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} |
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} |
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} |
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/** |
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* A faster alternative to array_unique. |
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* |
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* @return array |
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*/ |
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protected function getIdsWithoutDuplications() |
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{ |
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return array_flip(array_flip($this->ids)); |
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} |
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} |
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arrilot /
collectors
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.