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<?php |
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namespace SilverCommerce\TaxAdmin\Helpers; |
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use SilverStripe\Core\Config\Config; |
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use SilverStripe\Core\Config\Configurable; |
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use SilverStripe\Core\Injector\Injectable; |
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/** |
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* Simple helper class to provide generic functions to help with |
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* maths functions |
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*/ |
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class MathsHelper |
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{ |
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use Injectable; |
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use Configurable; |
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/** |
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* Round all numbers down globally |
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* |
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* @var boolean |
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*/ |
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private static $round_down = true; |
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/** |
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* Rounds up a float to a specified number of decimal places |
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* (basically acts like ceil() but allows for decimal places) |
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* |
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* @param float $value Float to round up |
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* @param int $places the number of decimal places to round to |
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* |
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* @return float |
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*/ |
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public static function round_up($value, $places = 0) |
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{ |
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return self::round($value, $places, false); |
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} |
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/** |
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* Rounds up a float to a specified number of decimal places |
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* (basically acts like ceil() but allows for decimal places) |
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* |
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* @param float $value Float to round up |
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* @param int $places the number of decimal places to round to |
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* |
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* @return float |
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*/ |
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public static function round_down($value, $places = 0) |
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{ |
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return self::round($value, $places, true); |
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} |
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/** |
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* Round the provided value to the defined number of places in the direction |
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* provided (up or down). |
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* |
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* @param float $value The value we want to round |
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* @param int $places The number of decimal places to round to |
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* @param boolean $down Do we round down? If false value will be rounded up |
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* |
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* @return float |
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*/ |
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public static function round($value, $places = 0, $down = null, $negatives = false) |
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{ |
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if (empty($down)) { |
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$down = Config::inst()->get(self::class, "round_down"); |
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} |
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$offset = 0; |
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// If we are rounding to decimals get a more granular number. |
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if ($places !== 0) { |
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if ($down) { |
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$offset = -0.45; |
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} else { |
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$offset = 0.45; |
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} |
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$offset /= pow(10, $places); |
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} |
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$return = round( |
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$value + $offset, |
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$places, |
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PHP_ROUND_HALF_UP |
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); |
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return $return; |
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} |
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} |
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silvercommerce /
tax-admin
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