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<?php |
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namespace Smoren\QueryRelationManager\Base\Structs; |
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use Countable; |
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use IteratorAggregate; |
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use Smoren\QueryRelationManager\Base\QueryRelationManagerException; |
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use Traversable; |
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/** |
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* Collection of join conditions used in select-query |
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* @author Smoren <[email protected]> |
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* @implements IteratorAggregate<JoinCondition> |
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*/ |
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class JoinConditionCollection implements Countable, IteratorAggregate |
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{ |
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/** |
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* @var JoinCondition[] map of JoinCondition objects indexed by alias of joined table |
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*/ |
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protected array $mapByJoinAs = []; |
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/** |
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* @var JoinCondition[][] map of JoinCondition objects lists indexed by alias of the table to join to |
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*/ |
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protected array $matrixByJoinTo = []; |
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/** |
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* Adds JoinCondition to collection |
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* @param JoinCondition $condition JoinCondition object |
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* @return $this |
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* @throws QueryRelationManagerException |
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*/ |
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public function add(JoinCondition $condition): self |
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{ |
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if(isset($this->mapByJoinAs[$condition->table->alias])) { |
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throw new QueryRelationManagerException("duplicate table alias '{$condition->table->alias}'"); |
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} |
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$this->mapByJoinAs[$condition->table->alias] = $condition; |
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if(!isset($this->matrixByJoinTo[$condition->joinTo->alias])) { |
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$this->matrixByJoinTo[$condition->joinTo->alias] = []; |
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} |
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if(isset($this->matrixByJoinTo[$condition->joinTo->alias][$condition->table->alias])) { |
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throw new QueryRelationManagerException("duplicate table alias '{$condition->table->alias}'"); |
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} |
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$this->matrixByJoinTo[$condition->joinTo->alias][$condition->table->alias] = $condition; |
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return $this; |
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} |
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/** |
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* Returns true if condition exists for the joined table alias |
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* @param string $joinAs joined table alias |
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* @return bool |
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*/ |
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public function issetByJoinAs(string $joinAs): bool |
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{ |
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if(!isset($this->mapByJoinAs[$joinAs])) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Returns join condition for the joined table alias |
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* @param string $joinAs joined table alias |
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* @return JoinCondition |
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*/ |
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public function byJoinAs(string $joinAs): JoinCondition |
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{ |
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return $this->mapByJoinAs[$joinAs]; |
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} |
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/** |
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* Returns list of join conditions by alias of table to join to |
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* @param string $joinTo alias of table to join to |
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* @return JoinCondition[] |
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*/ |
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public function byJoinTo(string $joinTo): array |
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{ |
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return $this->matrixByJoinTo[$joinTo] ?? []; |
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} |
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/** |
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* @inheritDoc |
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* @return Traversable<JoinCondition> |
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*/ |
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public function getIterator(): Traversable |
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{ |
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foreach($this->mapByJoinAs as $condition) { |
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yield $condition; |
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} |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function count(): int |
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{ |
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return count($this->mapByJoinAs); |
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} |
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} |
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Smoren /
query-relation-manager-php
