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<?php |
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/** |
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* Plasma Core component |
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* Copyright 2018-2019 PlasmaPHP, All Rights Reserved |
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* |
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* Website: https://github.com/PlasmaPHP |
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* License: https://github.com/PlasmaPHP/core/blob/master/LICENSE |
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*/ |
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namespace Plasma; |
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/** |
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* A query result stream. Used to get rows row by row, as sent by the DBMS. |
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* To adhere to the `react/stream` standard,a `close` event |
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* will be emitted after the `end` or `error` event. |
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*/ |
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class StreamQueryResult implements StreamQueryResultInterface { |
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use \Evenement\EventEmitterTrait; |
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/** |
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* @var \Plasma\CommandInterface |
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*/ |
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protected $command; |
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/** |
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* @var int |
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*/ |
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protected $affectedRows; |
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/** |
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* @var int |
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*/ |
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protected $warningsCount; |
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/** |
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* @var int|null |
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*/ |
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protected $insertID; |
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/** |
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* @var \Plasma\ColumnDefinitionInterface[]|null |
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*/ |
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protected $columns; |
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/** |
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* @var array|null |
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*/ |
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protected $rows; |
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/** |
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* Constructor. |
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* @param \Plasma\CommandInterface $command |
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* @param int $affectedRows |
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* @param int $warningsCount |
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* @param int|null $insertID |
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* @param \Plasma\ColumnDefinitionInterface[]|null $columns |
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*/ |
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function __construct(\Plasma\CommandInterface $command, int $affectedRows = 0, int $warningsCount = 0, ?int $insertID = null, ?array $columns = null) { |
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$this->command = $command; |
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$this->affectedRows = $affectedRows; |
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$this->warningsCount = $warningsCount; |
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$this->insertID = $insertID; |
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$this->columns = $columns; |
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$buffer = function ($row) { |
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$this->emit('data', array($row)); |
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}; |
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$command->on('data', $buffer); |
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$command->once('end', function () use ($buffer) { |
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$this->removeListener('data', $buffer); |
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$this->emit('end'); |
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$this->emit('close'); |
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}); |
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$command->once('error', function (\Throwable $error) use ($buffer) { |
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$this->removeListener('data', $buffer); |
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$this->emit('error', array($error)); |
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$this->emit('close'); |
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}); |
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} |
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/** |
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* Get the number of affected rows (for UPDATE, DELETE, etc.). |
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* @return int |
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*/ |
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function getAffectedRows(): int { |
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return $this->affectedRows; |
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} |
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/** |
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* Get the number of warnings sent by the server. |
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* @return int |
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*/ |
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function getWarningsCount(): int { |
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return $this->warningsCount; |
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} |
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/** |
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* Get the used insert ID for the row, if any. `INSERT` statements only. |
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* @return int|null |
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*/ |
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function getInsertID(): ?int { |
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return $this->insertID; |
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} |
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/** |
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* Get the field definitions, if any. `SELECT` statements only. |
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* @return \Plasma\ColumnDefinitionInterface[]|null |
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*/ |
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function getFieldDefinitions(): ?array { |
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return $this->columns; |
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} |
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/** |
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* Get the rows, if any. Returns always `null`. |
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* @return array|null |
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*/ |
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function getRows(): ?array { |
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return null; |
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} |
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/** |
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* Buffers all rows and returns a promise which resolves with an instance of `QueryResultInterface`. |
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* This method does not guarantee that all rows get returned, as the buffering depends on when this |
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* method gets invoked. There's no automatic buffering, as such rows may be missing if invoked too late. |
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* @return \React\Promise\PromiseInterface |
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*/ |
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1 |
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function all(): \React\Promise\PromiseInterface { |
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return \React\Promise\Stream\all($this)->then(function (array $rows) { |
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return (new \Plasma\QueryResult($this->affectedRows, $this->warningsCount, $this->insertID, $this->columns, $rows)); |
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}); |
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} |
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} |
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PlasmaPHP /
core
