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<?php |
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namespace Gielfeldt\TransactionalPHP; |
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/** |
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* Class Indexer |
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* |
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* @package Gielfeldt\TransactionalPHP |
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*/ |
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class Indexer |
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{ |
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/** |
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* Operations indexed by key and operation index. |
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* @var Operation[][] |
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*/ |
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protected $index = []; |
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/** |
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* The connection used by this indexer. |
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* |
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* @var Connection |
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*/ |
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protected $connection; |
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/** |
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* Indexer constructor. |
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* |
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* @param Connection $connection |
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*/ |
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public function __construct(Connection $connection) |
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{ |
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$this->connection = $connection; |
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} |
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/** |
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* Get connection. |
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* |
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* @return Connection |
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*/ |
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public function getConnection() |
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{ |
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return $this->connection; |
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} |
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/** |
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* Index operation. |
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* |
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* @param string $key |
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* The key to index under. |
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* @param Operation $operation |
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* The operation to index. |
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* |
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* @return Operation |
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* The operation indexed. |
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*/ |
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public function index($key, Operation $operation) |
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{ |
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$this->index[$key][$operation->idx($this->connection)] = $operation; |
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$indexer = $this; |
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$operation->onCommit(function ($operation) use ($key, $indexer) { |
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$indexer->deIndex($key, $operation); |
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}); |
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$operation->onRollback(function ($operation) use ($key, $indexer) { |
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$indexer->deIndex($key, $operation); |
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}); |
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return $operation; |
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} |
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/** |
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* De-index operation. |
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* |
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* @param string $key |
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* The key to index under. |
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* @param Operation $operation |
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* The operation to index. |
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* |
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* @return Operation |
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* The operation de-indexed. |
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*/ |
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public function deIndex($key, Operation $operation) |
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{ |
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unset($this->index[$key][$operation->idx($this->connection)]); |
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return $operation; |
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} |
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/** |
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* Lookup operation. |
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* |
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* @param string $key |
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* The key to look up. |
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* |
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* @return Operation[] |
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* Operations keyed by operation index. |
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*/ |
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public function lookup($key) |
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{ |
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return isset($this->index[$key]) ? $this->index[$key] : []; |
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} |
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/** |
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* Lookup operation values. |
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* |
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* @param string $key |
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* The key to look up. |
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* |
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* @return array |
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* Values keyed by operation index. |
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*/ |
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public function lookupValues($key) |
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{ |
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$values = []; |
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if (isset($this->index[$key])) { |
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foreach ($this->index[$key] as $operation) { |
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$values[$operation->idx($this->connection)] = $operation->getValue(); |
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} |
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} |
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return $values; |
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} |
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} |
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gielfeldt /
transactionalphp
