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<?php |
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3
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namespace Service\Calculator; |
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use Exception; |
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7
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class CalculatorService |
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{ |
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/** |
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* @var array |
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*/ |
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private array $operators = ['addition', 'subtraction', 'multiplication', 'division']; |
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/** |
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* @param string $operator |
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* @param string $operandA |
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* @param string $operandB |
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* |
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* @return mixed |
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*/ |
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public function calculate(string $operator, string $operandA, string $operandB): mixed |
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{ |
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if(!in_array($operator, $this->operators)) |
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{ |
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throw new Exception("$operator is not a valid operator."); |
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} |
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if($operandA === '' || $operandB === '') |
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{ |
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throw new Exception("The operands must not be empty."); |
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} |
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if(!is_numeric($operandA)) |
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{ |
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throw new Exception("$operandA is not a valid operand."); |
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} |
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if(!is_numeric($operandB)) |
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{ |
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throw new Exception("$operandB is not a valid operand."); |
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} |
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$operandA = intval($operandA); |
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$operandB = intval($operandB); |
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if($operator === 'division' && $operandB === 0) |
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{ |
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throw new Exception("Division by 0 is not allowed."); |
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} |
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return match($operator) { |
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'addition' => $operandA + $operandB, |
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'subtraction' => $operandA - $operandB, |
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'multiplication' => $operandA * $operandB, |
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'division' => $operandA / $operandB, |
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}; |
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} |
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} |
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jaxon-php /
jaxon-mono
