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<?php |
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namespace Sergiors\Pipeline; |
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/** |
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* @author Sérgio Rafael Siqueira <[email protected]> |
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*/ |
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final class Pipeline |
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{ |
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/** |
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* @var callable[] |
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*/ |
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private $callbacks; |
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/** |
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* @param array $callbacks |
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*/ |
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public function __construct(array $callbacks = []) |
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{ |
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$this->callbacks = array_filter($callbacks, 'is_callable'); |
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} |
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/** |
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* @param callable $callback |
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* |
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* @return Pipeline |
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*/ |
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public function pipe(callable $callback) |
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{ |
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return new self(array_merge($this->callbacks, [$callback])); |
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} |
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/** |
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* @param mixed $payload |
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* |
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* @return mixed |
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*/ |
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public function process($payload /* ...$args */) |
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{ |
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$rest = array_slice(func_get_args(), 1); |
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return array_reduce($this->callbacks, function ($payload, $callback) use ($rest) { |
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return call_user_func_array($callback, array_merge([$payload], $rest)); |
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}, $payload); |
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} |
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/** |
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* @param callable $fn |
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* @param array $args |
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* |
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* @return Pipeline |
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*/ |
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public function __call(callable $fn, array $args) |
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{ |
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$ks = (new self()) |
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->pipe(new Filter(function ($x) { |
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return '%' === $x; |
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})) |
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->pipe(function ($xs) { |
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return array_keys($xs) ?: []; |
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}) |
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->process($args); |
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return $this->pipe(function ($payload) use ($fn, $args, $ks) { |
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if ([] === $ks) { |
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return call_user_func_array($fn, array_merge($args, [$payload])); |
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} |
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return call_user_func_array($fn, array_replace($args, [ |
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$ks[0] => $payload |
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])); |
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}); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function __invoke(/* ...$args */) |
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{ |
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return call_user_func_array([$this, 'process'], func_get_args()); |
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} |
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} |
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sergiors /
pipeline
