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<?php |
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namespace mpyw\Co\Internal; |
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use mpyw\RuntimePromise\Deferred; |
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class YieldableUtils |
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{ |
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/** |
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* Recursively normalize value. |
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* Generator Closure -> GeneratorContainer |
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* Array -> Array (children's are normalized) |
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* Others -> Others |
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* @param mixed $value |
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* @param mixed $yield_key |
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* @return mixed |
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*/ |
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public static function normalize($value, $yield_key = null) |
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{ |
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if (TypeUtils::isGeneratorClosure($value)) { |
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$value = $value(); |
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} |
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if ($value instanceof \Generator) { |
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return new GeneratorContainer($value, $yield_key); |
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} |
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if (is_array($value)) { |
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$tmp = []; |
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foreach ($value as $k => $v) { |
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$tmp[$k] = self::normalize($v, $yield_key); |
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} |
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return $tmp; |
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} |
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return $value; |
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} |
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/** |
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* Recursively search yieldable values. |
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* Each entries are assoc those contain keys 'value' and 'keylist'. |
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* value -> the value itself. |
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* keylist -> position of the value. nests are represented as array values. |
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* @param mixed $value Must be already normalized. |
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* @param array $keylist Internally used. |
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* @param array &$runners Running cURL or Generator identifiers. |
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* @return array |
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*/ |
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public static function getYieldables($value, array $keylist = [], array &$runners = []) |
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{ |
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$r = []; |
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if (!is_array($value)) { |
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if (TypeUtils::isCurl($value) || TypeUtils::isGeneratorContainer($value)) { |
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if (isset($runners[(string)$value])) { |
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throw new \DomainException('Duplicated cURL resource or Generator instance found.'); |
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} |
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$r[(string)$value] = $runners[(string)$value] = [ |
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'value' => $value, |
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'keylist' => $keylist, |
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]; |
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} |
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return $r; |
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} |
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foreach ($value as $k => $v) { |
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$newlist = array_merge($keylist, [$k]); |
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$r = array_merge($r, self::getYieldables($v, $newlist, $runners)); |
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} |
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return $r; |
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} |
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/** |
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* Return function that apply changes in yieldables. |
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* @param mixed $yielded |
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* @param array $yieldables |
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* @param callable|null $next |
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* @return mixed |
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*/ |
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public static function getApplier($yielded, array $yieldables, callable $next = null) |
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{ |
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return function (array $results) use ($yielded, $yieldables, $next) { |
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foreach ($results as $hash => $resolved) { |
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$current = &$yielded; |
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foreach ($yieldables[$hash]['keylist'] as $key) { |
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$current = &$current[$key]; |
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} |
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$current = $resolved; |
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unset($current); |
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} |
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return $next ? $next($yielded) : $yielded; |
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}; |
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} |
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/** |
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* Return Deferred that absorbs rejects. |
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* @param Deferred $original_dfd |
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* @return Deferred |
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*/ |
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public static function safeDeferred(Deferred $original_dfd) |
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{ |
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$dfd = new Deferred; |
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$absorber = function ($any) use ($original_dfd) { |
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$original_dfd->resolve($any); |
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}; |
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$dfd->promise()->then($absorber, $absorber); |
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return $dfd; |
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} |
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} |
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mpyw /
co
