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<?php |
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namespace mpyw\Co\Internal; |
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use React\Promise\Deferred; |
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use React\Promise\PromiseInterface; |
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class Delayer |
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{ |
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/** |
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* Delays to be ended at. |
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* @var array |
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*/ |
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private $untils = []; |
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/** |
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* Deferreds. |
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* @var array |
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*/ |
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private $deferreds = []; |
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/** |
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* Add delay. |
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* @param int $time |
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* @return PromiseInterface |
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*/ |
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public function add($time) |
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{ |
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$deferred = new Deferred; |
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$time = filter_var($time, FILTER_VALIDATE_FLOAT); |
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if ($time === false) { |
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throw new \InvalidArgumentException('Delay must be number.'); |
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} |
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if ($time < 0) { |
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throw new \DomainException('Delay must be positive.'); |
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} |
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do { |
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$id = uniqid(); |
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} while (isset($this->untils[$id])); |
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$this->untils[$id] = microtime(true) + $time; |
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$this->deferreds[$id] = $deferred; |
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return $deferred->promise(); |
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} |
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/** |
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* Sleep at least required. |
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*/ |
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public function sleep() |
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{ |
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$now = microtime(true); |
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$min = null; |
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foreach ($this->untils as $id => $until) { |
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$diff = $until - $now; |
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if ($diff < 0) { |
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// @codeCoverageIgnoreStart |
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return; |
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// @codeCoverageIgnoreEnd |
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} |
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if ($min !== null && $diff >= $min) { |
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continue; |
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} |
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$min = $diff; |
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} |
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$min && usleep($min * 1000000); |
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} |
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/** |
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* Consume delay queue. |
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*/ |
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public function consume() |
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{ |
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foreach ($this->untils as $id => $until) { |
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$diff = $until - microtime(true); |
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if ($diff > 0.0 || !isset($this->deferreds[$id])) { |
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continue; |
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} |
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$deferred = $this->deferreds[$id]; |
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unset($this->deferreds[$id], $this->untils[$id]); |
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$deferred->resolve(null); |
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} |
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} |
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/** |
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* Is $untils empty? |
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* @return bool |
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*/ |
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public function isEmpty() |
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{ |
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return !$this->untils; |
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} |
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} |
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mpyw /
co
