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<?php |
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/** |
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* The ResponseQueue sorts responses order and |
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* determines what responses are valid or not. |
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* |
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* @package Rivescript-php |
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* @subpackage Core |
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* @category ResponseQueue |
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* @author Johnny Mast <[email protected]> |
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*/ |
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namespace Axiom\Rivescript\Cortex\ResponseQueue; |
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use Axiom\Collections\Collection; |
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use Axiom\Rivescript\Cortex\Node; |
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use Axiom\Rivescript\Traits\Tags; |
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/** |
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* Class ResponseQueue |
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*/ |
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class ResponseQueue extends Collection |
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{ |
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use Tags; |
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/** |
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* A container with responses. |
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* |
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* @var Collection<ResponseQueueItem> |
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*/ |
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protected $responses; |
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/** |
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* ResponseQueue constructor. |
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*/ |
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public function __construct() |
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{ |
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$this->responses = new Collection([]); |
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} |
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/** |
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* Attach a response to the queue. |
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* |
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* @param Node $node The node contains information about the command. |
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* |
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* @return void |
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*/ |
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public function attach(Node $node) |
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{ |
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$type = $this->determineResponseType($node->source()); |
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$this->responses->put($node->value(), new ResponseQueueItem($node->command(), $type, 0)); |
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} |
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/** |
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* Sort the responses by order. |
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* |
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* @param Collection<ResponseQueueItem> $responses The array containing the resources. |
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* |
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* @return Collection<ResponseQueueItem> |
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*/ |
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private function sortResponses(Collection $responses): Collection |
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{ |
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return $responses->sort( |
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function ($current, $previous) { |
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return ($current->order < $previous->order) ? -1 : 1; |
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} |
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)->reverse(); |
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} |
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/** |
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* Check if a response is allowed to be returned by the bot or not. |
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* |
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* @param string $response The response to validate. |
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* @param ResponseQueueItem $item The ResponseQueueItem. |
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* |
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* @return false|mixed |
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*/ |
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private function validateResponse(string $response, ResponseQueueItem $item) |
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{ |
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$response = $this->parseTags($response); |
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foreach (synapse()->responses as $class) { |
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if (ucfirst($item->type) == $class and class_exists("\\Axiom\\Rivescript\\Cortex\\Responses\\{$class}")) { |
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$class = "\\Axiom\\Rivescript\\Cortex\\Responses\\{$class}"; |
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$class = new $class($response, $item); |
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$result = $class->parse(); |
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if ($result) { |
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return $result; |
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} |
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} |
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} |
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return false; |
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} |
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private function mergeContinues(Collection $responses): Collection |
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{ |
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$lastData = $responses->first(); |
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$lastResponse = ""; |
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$responses->each( |
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function (ResponseQueueItem $data, $response) use (&$lastData, &$lastResponse, &$responses) { |
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if ($data->type == 'continue' && $lastData->command == '-') { |
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$responses->remove($lastResponse); |
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$responses->remove($response); |
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$lastResponse .= $response; |
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$responses->put($lastResponse, $lastData); |
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} |
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if ($data->command !== '^') { |
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$lastData = $data; |
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$lastResponse = $response; |
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} |
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} |
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); |
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return $responses; |
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} |
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/** |
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* Determine the order of responses by type. |
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* |
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* @param Collection<ResponseQueueItem> $responses The responses to inspect. |
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* |
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* @return Collection<ResponseQueueItem> |
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* @noinspection PhpVoidFunctionResultUsedInspection |
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*/ |
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private function determineResponseOrder(Collection $responses): Collection |
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{ |
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return $responses->each( |
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function (ResponseQueueItem $data, $response) use ($responses) { |
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if (isset($data->type)) { |
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switch ($data->type) { |
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case 'condition': |
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$data->order += 3000000; |
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break; |
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case 'weighted': |
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case 'atomic': |
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$data->order += 1000000; |
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break; |
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} |
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$responses->put($response, $data); |
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} |
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} |
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); |
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} |
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/** |
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* Determine the response type. |
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* |
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* @param string $response |
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* |
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* @return string |
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*/ |
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public function determineResponseType(string $response): string |
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{ |
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$wildcards = [ |
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'weighted' => '{weight=(.+?)}', |
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'condition' => '/^\*/', |
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'continue' => '/^\^/', |
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'atomic' => '/-/', |
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]; |
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foreach ($wildcards as $type => $pattern) { |
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if (@preg_match_all($pattern, $response, $matches)) { |
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return $type; |
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} |
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} |
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return 'atomic'; |
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} |
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/** |
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* Process the Response Queue. |
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* |
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* @return false|int|string|null |
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*/ |
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public function process() |
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{ |
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$this->responses = $this->mergeContinues($this->responses); |
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$this->responses = $this->determineResponseOrder($this->responses); |
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$validResponses = new Collection([]); |
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foreach ($this->responses as $response => $item) { |
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$result = $this->validateResponse($response, $item); |
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if ($result !== false) { |
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$validResponses->put($result, $item); |
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} |
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} |
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$validResponses = $this->sortResponses($validResponses); |
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if ($validResponses->count() > 0) { |
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return $validResponses->keys()->first(); |
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} |
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return false; |
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} |
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} |
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