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<?php
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/**
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* @author Aleksandar Panic
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* @license http://www.apache.org/licenses/LICENSE-2.0
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* @since 1.0.0
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**/
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namespace ArekX\ArrayExpression\Operators;
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use ArekX\ArrayExpression\Interfaces\Operator;
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use ArekX\ArrayExpression\Interfaces\ValueParser;
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/**
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* Class CompareOperator
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* Operator for handling comparisons.
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*
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* @package ArekX\ArrayExpression\Operators
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*/
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class CompareOperator extends BaseOperator
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{
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const EQ = '=';
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const LT = '<';
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const GT = '>';
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const LTE = '<=';
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const GTE = '>=';
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const NE = '<>';
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const IN = 'in';
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/**
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* Operator which will be used for comparison.
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*
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* @var string
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*/
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public $operator = self::EQ;
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/**
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* Value which will be taken from value parser.
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*
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* @var Operator
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*/
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public $operandA;
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/**
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* @var Operator
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*/
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public $operandB;
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/**
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* @inheritDoc
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*/
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public function configure(array $config)
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{
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$this->setName($config[0] ?? 'unknown');
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if (count($config) < 3) {
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throw new \InvalidArgumentException("Minimum format must be satisfied: ['{$this->getName()}', <expressionA>, <expressionB>]");
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}
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$lastParam = $config[3] ?? null;
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$this->assertIsExpression($config[1]);
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if ($lastParam !== null) {
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$this->assertIsExpression($lastParam);
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$this->operandA = $this->parser->parse($config[1]);
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$this->setOperator($config[2]);
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$this->operandB = $this->parser->parse($lastParam);
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return;
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}
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$this->assertIsExpression($config[2]);
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$this->operandA = $this->parser->parse($config[1]);
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$this->operandB = $this->parser->parse($config[2]);
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$this->setOperator(self::EQ);
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}
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/**
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* Sets operator for result checking.
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*
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* @param string $operator
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*/
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public function setOperator($operator)
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{
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$this->operator = $operator;
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}
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/**
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* @inheritDoc
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*/
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public function evaluate(ValueParser $value)
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{
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$resultA = $this->operandA->evaluate($value);
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$resultB = $this->operandB->evaluate($value);
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switch ($this->operator) {
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case self::NE:
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return $resultA !== $resultB;
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case self::EQ:
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return $resultA === $resultB;
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case self::LT:
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return $resultA < $resultB;
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case self::LTE:
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return $resultA <= $resultB;
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case self::GT:
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return $resultA > $resultB;
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case self::GTE:
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return $resultA >= $resultB;
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case self::IN:
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return in_array($resultA, $resultB, true);
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}
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return $resultA === $resultB;
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}
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} |
ArekX /
array-expression-engine
