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<?php |
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namespace DiceCalc; |
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/** |
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* Class CalcOperation |
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* |
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* @package DiceCalc |
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* @author Owen Winkler <[email protected]> |
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* @license MIT http://opensource.org/licenses/MIT |
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*/ |
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class CalcOperation |
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{ |
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static protected $operators = [ |
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'+' => 'add', |
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'*' => 'multiply', |
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'=' => 'equalto', |
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'<' => 'lessthan', |
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'>' => 'greaterthan', |
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'^' => 'exponent', |
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'/' => 'divide', |
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'-' => 'subtract', |
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]; |
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/** |
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* @param string $operator |
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* @param $operand2 |
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* @param $operand1 |
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* |
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* @throws \Exception |
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* @return bool|number |
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*/ |
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public static function calc($operator, $operand1, $operand2) |
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{ |
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if(isset(static::$operators[$operator])) { |
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return call_user_func(array('self', static::$operators[$operator]), self::reduce($operand1), self::reduce($operand2)); |
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} |
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throw new \Exception('Unknown operator "' . $operator . '".'); |
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} |
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/** |
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* @param $operand |
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* |
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* @return number|string |
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* @throws \Exception |
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*/ |
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public static function reduce($operand) |
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{ |
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if(is_numeric($operand)) { |
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return $operand; |
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} |
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elseif ($operand instanceof Calc) { |
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return $operand(); |
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} |
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throw new \Exception('This is not a number'); |
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} |
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/** |
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* @param number $operand1 |
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* @param number $operand2 |
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* |
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* @return bool|number |
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*/ |
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protected static function add($operand1, $operand2) |
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{ |
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return $operand1 + $operand2; |
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} |
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/** |
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* @param number $operand1 |
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* @param number $operand2 |
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* |
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* @return bool|number |
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*/ |
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protected static function multiply($operand1, $operand2) |
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{ |
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return $operand1 * $operand2; |
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} |
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/** |
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* @param number $operand1 |
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* @param number $operand2 |
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* |
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* @return bool|number |
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*/ |
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protected static function subtract($operand1, $operand2) |
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{ |
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return $operand1 - $operand2; |
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} |
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/** |
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* @param number $operand1 |
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* @param number $operand2 |
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* |
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* @return bool|number |
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*/ |
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protected static function divide($operand1, $operand2) |
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{ |
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return $operand1 / $operand2; |
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} |
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/** |
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* @param number $operand1 |
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* @param number $operand2 |
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* |
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* @return bool|number |
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*/ |
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protected static function exponent($operand1, $operand2) |
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{ |
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return pow($operand1, $operand2); |
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} |
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/** |
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* @param number $operand1 |
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* @param number $operand2 |
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* |
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* @return bool |
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*/ |
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protected static function greaterthan($operand1, $operand2) |
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{ |
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return $operand1 > $operand2; |
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} |
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/** |
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* @param number $operand1 |
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* @param number $operand2 |
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* |
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* @return bool |
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*/ |
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protected static function lessthan($operand1, $operand2) |
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{ |
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return ($operand1 < $operand2); |
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} |
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/** |
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* @param number $operand1 |
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* @param number $operand2 |
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* |
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* @return bool |
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*/ |
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protected static function equalto($operand1, $operand2) |
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{ |
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return ($operand1 == $operand2); |
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} |
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} |
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sergej-kurakin /
dicecalc
