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<?php |
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|
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namespace React\Promise; |
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|
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function resolve($promiseOrValue = null) |
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{ |
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if ($promiseOrValue instanceof ExtendedPromiseInterface) { |
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return $promiseOrValue; |
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} |
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|
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if (method_exists($promiseOrValue, 'then')) { |
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$canceller = null; |
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|
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if (method_exists($promiseOrValue, 'cancel')) { |
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$canceller = [$promiseOrValue, 'cancel']; |
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} |
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|
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return new Promise(function ($resolve, $reject, $notify) use ($promiseOrValue) { |
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$promiseOrValue->then($resolve, $reject, $notify); |
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}, $canceller); |
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} |
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|
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return new FulfilledPromise($promiseOrValue); |
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} |
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|
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function reject($promiseOrValue = null) |
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{ |
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if ($promiseOrValue instanceof PromiseInterface) { |
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return resolve($promiseOrValue)->then(function ($value) { |
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return new RejectedPromise($value); |
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}); |
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} |
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|
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return new RejectedPromise($promiseOrValue); |
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} |
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|
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function all($promisesOrValues) |
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{ |
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return map($promisesOrValues, function ($val) { |
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return $val; |
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}); |
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} |
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|
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function race($promisesOrValues) |
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{ |
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$cancellationQueue = new CancellationQueue(); |
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$cancellationQueue->enqueue($promisesOrValues); |
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|
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return new Promise(function ($resolve, $reject, $notify) use ($promisesOrValues, $cancellationQueue) { |
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resolve($promisesOrValues) |
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->done(function ($array) use ($cancellationQueue, $resolve, $reject, $notify) { |
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if (!is_array($array) || !$array) { |
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$resolve(); |
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return; |
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} |
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|
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foreach ($array as $promiseOrValue) { |
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$cancellationQueue->enqueue($promiseOrValue); |
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|
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resolve($promiseOrValue) |
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->done($resolve, $reject, $notify); |
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} |
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}, $reject, $notify); |
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}, $cancellationQueue); |
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} |
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|
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function any($promisesOrValues) |
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{ |
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return some($promisesOrValues, 1) |
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->then(function ($val) { |
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return array_shift($val); |
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}); |
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} |
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|
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function some($promisesOrValues, $howMany) |
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{ |
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$cancellationQueue = new CancellationQueue(); |
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$cancellationQueue->enqueue($promisesOrValues); |
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|
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return new Promise(function ($resolve, $reject, $notify) use ($promisesOrValues, $howMany, $cancellationQueue) { |
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resolve($promisesOrValues) |
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->done(function ($array) use ($howMany, $cancellationQueue, $resolve, $reject, $notify) { |
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if (!is_array($array) || $howMany < 1) { |
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$resolve([]); |
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return; |
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} |
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|
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$len = count($array); |
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|
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if ($len < $howMany) { |
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throw new Exception\LengthException( |
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sprintf( |
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'Input array must contain at least %d item%s but contains only %s item%s.', |
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$howMany, |
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1 === $howMany ? '' : 's', |
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$len, |
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1 === $len ? '' : 's' |
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) |
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); |
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} |
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|
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$toResolve = $howMany; |
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$toReject = ($len - $toResolve) + 1; |
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$values = []; |
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$reasons = []; |
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|
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foreach ($array as $i => $promiseOrValue) { |
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$fulfiller = function ($val) use ($i, &$values, &$toResolve, $toReject, $resolve) { |
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if ($toResolve < 1 || $toReject < 1) { |
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return; |
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} |
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|
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$values[$i] = $val; |
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|
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if (0 === --$toResolve) { |
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$resolve($values); |
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} |
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}; |
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|
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$rejecter = function ($reason) use ($i, &$reasons, &$toReject, $toResolve, $reject) { |
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if ($toResolve < 1 || $toReject < 1) { |
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return; |
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} |
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|
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$reasons[$i] = $reason; |
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|
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if (0 === --$toReject) { |
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$reject($reasons); |
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} |
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}; |
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|
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$cancellationQueue->enqueue($promiseOrValue); |
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|
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resolve($promiseOrValue) |
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->done($fulfiller, $rejecter, $notify); |
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} |
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}, $reject, $notify); |
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}, $cancellationQueue); |
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} |
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|
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function map($promisesOrValues, callable $mapFunc) |
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{ |
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$cancellationQueue = new CancellationQueue(); |
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$cancellationQueue->enqueue($promisesOrValues); |
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|
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return new Promise(function ($resolve, $reject, $notify) use ($promisesOrValues, $mapFunc, $cancellationQueue) { |
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resolve($promisesOrValues) |
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->done(function ($array) use ($mapFunc, $cancellationQueue, $resolve, $reject, $notify) { |
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if (!is_array($array) || !$array) { |
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$resolve([]); |
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return; |
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} |
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|
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$toResolve = count($array); |
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$values = []; |
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|
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foreach ($array as $i => $promiseOrValue) { |
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$cancellationQueue->enqueue($promiseOrValue); |
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$values[$i] = null; |
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|
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resolve($promiseOrValue) |
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->then($mapFunc) |
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->done( |
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function ($mapped) use ($i, &$values, &$toResolve, $resolve) { |
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$values[$i] = $mapped; |
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|
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if (0 === --$toResolve) { |
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$resolve($values); |
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} |
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}, |
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$reject, |
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$notify |
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); |
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} |
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}, $reject, $notify); |
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}, $cancellationQueue); |
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} |
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|
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function reduce($promisesOrValues, callable $reduceFunc, $initialValue = null) |
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{ |
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$cancellationQueue = new CancellationQueue(); |
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$cancellationQueue->enqueue($promisesOrValues); |
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|
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return new Promise(function ($resolve, $reject, $notify) use ($promisesOrValues, $reduceFunc, $initialValue, $cancellationQueue) { |
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resolve($promisesOrValues) |
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->done(function ($array) use ($reduceFunc, $initialValue, $cancellationQueue, $resolve, $reject, $notify) { |
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if (!is_array($array)) { |
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$array = []; |
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} |
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|
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$total = count($array); |
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$i = 0; |
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|
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// Wrap the supplied $reduceFunc with one that handles promises and then |
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// delegates to the supplied. |
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$wrappedReduceFunc = function ($current, $val) use ($reduceFunc, $cancellationQueue, $total, &$i) { |
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$cancellationQueue->enqueue($val); |
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|
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return $current |
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->then(function ($c) use ($reduceFunc, $total, &$i, $val) { |
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return resolve($val) |
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->then(function ($value) use ($reduceFunc, $total, &$i, $c) { |
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return $reduceFunc($c, $value, $i++, $total); |
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}); |
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}); |
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}; |
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|
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$cancellationQueue->enqueue($initialValue); |
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|
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array_reduce($array, $wrappedReduceFunc, resolve($initialValue)) |
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->done($resolve, $reject, $notify); |
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}, $reject, $notify); |
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}, $cancellationQueue); |
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} |
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|
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// Internal functions |
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function _checkTypehint(callable $callback, $object) |
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{ |
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if (!is_object($object)) { |
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return true; |
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} |
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|
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if (is_array($callback)) { |
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$callbackReflection = new \ReflectionMethod($callback[0], $callback[1]); |
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} elseif (is_object($callback) && !$callback instanceof \Closure) { |
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$callbackReflection = new \ReflectionMethod($callback, '__invoke'); |
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} else { |
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$callbackReflection = new \ReflectionFunction($callback); |
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} |
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|
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$parameters = $callbackReflection->getParameters(); |
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|
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if (!isset($parameters[0])) { |
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return true; |
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} |
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|
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$expectedException = $parameters[0]; |
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|
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if (!$expectedException->getClass()) { |
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return true; |
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} |
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|
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return $expectedException->getClass()->isInstance($object); |
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} |
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|
