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<?php |
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namespace Botonomous; |
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use Botonomous\utility\MessageUtility; |
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use NlpTools\Stemmers\PorterStemmer; |
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use NlpTools\Tokenizers\WhitespaceTokenizer; |
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/** |
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* Class CommandExtractor. |
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*/ |
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class CommandExtractor |
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{ |
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private $config; |
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private $error; |
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private $messageUtility; |
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private $dictionary; |
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private $commandContainer; |
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/** |
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* @param null $message |
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* |
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* @return Command|void |
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*/ |
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public function getCommandByMessage($message) |
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{ |
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if (empty($message)) { |
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$this->setError('Message is empty'); |
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return; |
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} |
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/* |
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* Process the message and find explicitly specified command |
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*/ |
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$foundCommand = $this->getCommandObjectByMessage($message); |
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return $foundCommand; |
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} |
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public function countKeywordOccurrence($message) |
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{ |
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$stemmer = new PorterStemmer(); |
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// tokenize $message |
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$stemmedMessage = implode(' ', $stemmer->stemAll((new WhitespaceTokenizer())->tokenize($message))); |
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$keywordCount = []; |
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foreach ($this->getCommandContainer()->getAllAsObject() as $commandKey => $commandObject) { |
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$keywords = $commandObject->getKeywords(); |
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if (empty($keywords)) { |
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continue; |
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} |
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$keywordsPositions = $this->getMessageUtility()->keywordPos($stemmer->stemAll($keywords), $stemmedMessage); |
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$total = 0; |
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if (empty($keywordsPositions)) { |
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$keywordCount[$commandKey] = $total; |
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continue; |
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} |
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foreach ($keywordsPositions as $keywordPositions) { |
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$total += count($keywordPositions); |
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} |
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$keywordCount[$commandKey] = $total; |
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} |
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return $keywordCount; |
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} |
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/** |
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* @param $message |
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* |
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* @return Command|void |
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*/ |
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private function getCommandObjectByMessage($message) |
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{ |
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$command = $this->getMessageUtility()->extractCommandName($message); |
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// check command name |
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if (empty($command)) { |
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// get the default command if no command is find in the message |
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$command = $this->getConfig()->get('defaultCommand'); |
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if (empty($command)) { |
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$this->setError($this->getDictionary()->get('generic-messages')['noCommandMessage']); |
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return; |
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} |
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} |
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return $this->getCommandObjectByCommand($command); |
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} |
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/** |
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* @param $command |
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* |
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* @return Command|void |
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*/ |
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private function getCommandObjectByCommand($command) |
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{ |
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$commandObject = $this->getCommandContainer()->getAsObject($command); |
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if ($this->validateCommandObject($commandObject) !== true) { |
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return; |
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} |
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return $commandObject; |
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} |
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/** |
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* Validate the command object. |
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* |
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* @param Command|null $commandObject |
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* |
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* @return bool |
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*/ |
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private function validateCommandObject($commandObject) |
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{ |
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// check command details |
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if (empty($commandObject)) { |
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$this->setError( |
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$this->getDictionary()->getValueByKey('generic-messages', 'unknownCommandMessage') |
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); |
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return false; |
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} |
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return true; |
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} |
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/** |
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* @return string |
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*/ |
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public function getError() |
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{ |
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return $this->error; |
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} |
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/** |
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* @param string $error |
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*/ |
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public function setError($error) |
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{ |
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$this->error = $error; |
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} |
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/** |
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* @return Config |
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*/ |
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public function getConfig() |
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{ |
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if ($this->config === null) { |
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$this->config = (new Config()); |
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} |
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return $this->config; |
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} |
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/** |
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* @param Config $config |
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*/ |
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public function setConfig(Config $config) |
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{ |
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$this->config = $config; |
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} |
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/** |
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* @return MessageUtility |
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*/ |
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public function getMessageUtility() |
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{ |
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if (!isset($this->messageUtility)) { |
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$this->setMessageUtility(new MessageUtility()); |
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} |
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return $this->messageUtility; |
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} |
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/** |
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* @param MessageUtility $messageUtility |
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*/ |
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public function setMessageUtility(MessageUtility $messageUtility) |
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{ |
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$this->messageUtility = $messageUtility; |
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} |
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/** |
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* @return Dictionary |
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*/ |
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public function getDictionary() |
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{ |
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if (!isset($this->dictionary)) { |
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$this->setDictionary(new Dictionary()); |
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} |
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return $this->dictionary; |
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} |
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/** |
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* @param Dictionary $dictionary |
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*/ |
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public function setDictionary(Dictionary $dictionary) |
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{ |
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$this->dictionary = $dictionary; |
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} |
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/** |
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* @return CommandContainer |
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*/ |
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public function getCommandContainer() |
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{ |
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if (!isset($this->commandContainer)) { |
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$this->setCommandContainer(new CommandContainer()); |
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} |
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return $this->commandContainer; |
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} |
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/** |
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* @param CommandContainer $commandContainer |
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*/ |
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public function setCommandContainer(CommandContainer $commandContainer) |
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{ |
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$this->commandContainer = $commandContainer; |
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} |
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} |
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iranianpep /
botonomous
