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<?php |
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namespace CondParse; |
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use CondParse\Exception\TokenMapException; |
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use CondParse\Operand\AndOperator; |
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use CondParse\Operand\BooleanOperand; |
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use CondParse\Operand\NotOperand; |
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use CondParse\Operand\OrOperator; |
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class TokenMap |
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{ |
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const TOKEN_NOT = 'NOT'; |
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const TOKEN_AND = 'AND'; |
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const TOKEN_OR = 'OR'; |
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const TOKEN_BRACKET_OPEN = 'BRACKET_OPEN'; |
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const TOKEN_BRACKET_CLOSE = 'BRACKET_CLOSE'; |
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const TOKEN_TRUE = 'TRUE'; |
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const TOKEN_FALSE = 'FALSE'; |
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const TOKEN_WHITESPACE = 'WHITESPACE'; |
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const DEFAULT_TOKENS = [ |
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self::TOKEN_NOT => '\!', |
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self::TOKEN_AND => '&&', |
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self::TOKEN_OR => '\|\|', |
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self::TOKEN_BRACKET_OPEN => '\(', |
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self::TOKEN_BRACKET_CLOSE => '\)', |
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self::TOKEN_TRUE => 'true', |
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self::TOKEN_FALSE => 'false', |
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self::TOKEN_WHITESPACE => '\s+' |
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]; |
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const DEFAULT_OPERAND_TOKENS = [ |
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self::TOKEN_TRUE, self::TOKEN_FALSE |
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]; |
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const DEFAULT_OPERATOR_PRECEDENCE = [ |
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self::TOKEN_BRACKET_OPEN => -1, |
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self::TOKEN_BRACKET_CLOSE => -1, |
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self::TOKEN_OR => 100, |
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self::TOKEN_AND => 1000, |
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self::TOKEN_NOT => 10000 |
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]; |
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const DEFAULT_TOKEN_CLASSES = [ |
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self::TOKEN_AND => AndOperator::class, |
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self::TOKEN_OR => OrOperator::class, |
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self::TOKEN_TRUE => BooleanOperand::class, |
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self::TOKEN_FALSE => BooleanOperand::class, |
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self::TOKEN_NOT => NotOperand::class |
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]; |
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private $tokenList = self::DEFAULT_TOKENS; |
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private $operandTokens = self::DEFAULT_OPERAND_TOKENS; |
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private $operatorPrecedence = self::DEFAULT_OPERATOR_PRECEDENCE; |
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private $tokenClasses = self::DEFAULT_TOKEN_CLASSES; |
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/** |
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* @param string $name |
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* @param string $regex |
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* @param string $class |
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*/ |
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public function registerOperand($name, $regex, $class) |
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{ |
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$this->registerToken($name, $regex, $class); |
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$this->operandTokens[] = $name; |
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} |
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/** |
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* @param string $name |
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* @param string $regex |
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* @param int $precedence |
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* @param string $class |
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*/ |
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public function registerOperator($name, $regex, $precedence, $class) |
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{ |
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$this->registerToken($name, $regex, $class); |
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$this->operatorPrecedence[$name] = $precedence; |
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} |
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/** |
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* @param string $name |
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* @param string $regex |
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* @param string $class |
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* @throws TokenMapException |
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*/ |
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protected function registerToken($name, $regex, $class) |
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{ |
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$this->verifyTokenConfig($name, $class); |
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$this->tokenList[$name] = $regex; |
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$this->tokenClasses[$name] = $class; |
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} |
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/** |
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* @return string[] |
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*/ |
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public function getTokens() |
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{ |
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return $this->tokenList; |
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} |
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/** |
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* @param LexerToken $leftLexerToken |
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* @param LexerToken $rightLexerToken |
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* @return int |
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*/ |
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public function compareOperatorPrecedence(LexerToken $leftLexerToken, LexerToken $rightLexerToken) |
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{ |
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return |
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$this->operatorPrecedence[$leftLexerToken->getToken()] |
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- $this->operatorPrecedence[$rightLexerToken->getToken()]; |
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} |
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/** |
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* @param LexerToken $lexerToken |
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* @return bool |
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*/ |
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public function isOperand(LexerToken $lexerToken) |
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{ |
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return in_array($lexerToken->getToken(), $this->operandTokens); |
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} |
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/** |
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* @param LexerToken $lexerToken |
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* @return OperandInterface |
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*/ |
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public function buildOperand(LexerToken $lexerToken) |
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{ |
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return new $this->tokenClasses[$lexerToken->getToken()]($lexerToken); |
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} |
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/** |
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* @param string $name |
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* @param string $class |
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* @throws TokenMapException |
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*/ |
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protected function verifyTokenConfig($name, $class) |
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{ |
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if (!is_string($name)) { |
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throw new TokenMapException('Can\'t register token, name must be string'); |
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} |
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if (isset($this->tokenList[$name])) { |
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throw new TokenMapException(sprintf( |
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'Token <%s> already defined with regex <%s>', |
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$name, $this->tokenList[$name] |
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)); |
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} |
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if (!is_subclass_of($class, OperandInterface::class)) { |
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throw new TokenMapException(sprintf( |
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'Token <%s> with class <%s> must implement OperandInterface', $name, $class |
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)); |
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} |
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} |
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} |
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zwilias /
condparse
