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<?php |
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|
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namespace React\Promise; |
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|
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class LazyPromise implements ExtendedPromiseInterface, CancellablePromiseInterface |
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{ |
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private $factory; |
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private $promise; |
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|
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public function __construct(callable $factory) |
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{ |
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$this->factory = $factory; |
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} |
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|
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public function then(callable $onFulfilled = null, callable $onRejected = null, callable $onProgress = null) |
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{ |
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return $this->promise()->then($onFulfilled, $onRejected, $onProgress); |
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} |
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|
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public function done(callable $onFulfilled = null, callable $onRejected = null, callable $onProgress = null) |
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{ |
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return $this->promise()->done($onFulfilled, $onRejected, $onProgress); |
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} |
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|
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public function otherwise(callable $onRejected) |
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{ |
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return $this->promise()->otherwise($onRejected); |
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} |
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|
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public function always(callable $onFulfilledOrRejected) |
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{ |
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return $this->promise()->always($onFulfilledOrRejected); |
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} |
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|
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public function progress(callable $onProgress) |
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{ |
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return $this->promise()->progress($onProgress); |
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} |
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|
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public function cancel() |
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{ |
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return $this->promise()->cancel(); |
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} |
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|
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/** |
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* @internal |
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* @see Promise::settle() |
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*/ |
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public function promise() |
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{ |
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if (null === $this->promise) { |
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try { |
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$this->promise = resolve(call_user_func($this->factory)); |
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} catch (\Throwable $exception) { |
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$this->promise = new RejectedPromise($exception); |
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} catch (\Exception $exception) { |
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$this->promise = new RejectedPromise($exception); |
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} |
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} |
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|
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return $this->promise; |
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} |
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} |
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