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<?php |
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/** |
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* PHP: Nelson Martell Library file |
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* |
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* Copyright © 2019 Nelson Martell (http://nelson6e65.github.io) |
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* |
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* Licensed under The MIT License (MIT) |
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* For full copyright and license information, please see the LICENSE |
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* Redistributions of files must retain the above copyright notice. |
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* |
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* @copyright 2019 Nelson Martell |
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* @link http://nelson6e65.github.io/php_nml/ |
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* @since 1.0.0 |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License (MIT) |
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* */ |
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namespace NelsonMartell\Extensions; |
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use InvalidArgumentException; |
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use NelsonMartell\IComparer; |
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use NelsonMartell\IComparable; |
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use NelsonMartell\StrictObject; |
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use function NelsonMartell\msg; |
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use function NelsonMartell\typeof; |
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/** |
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* Provides extension methods to handle numbers. |
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* |
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* @since 1.0.0 |
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* @author Nelson Martell <[email protected]> |
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* */ |
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class Objects implements IComparer |
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{ |
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/** |
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* Determines the relative position of the object on the left with respect to the one on the right. |
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* |
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* This method is compatible with core types and other types. You can implement `NelsonMartell\IComparable` |
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* in order to improve the beaviour for other classes. |
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* |
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* This method can be used as sorting function for `usort()` function. |
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* |
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* **Notes:** |
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* - Comparison is made in natural way if they are of the same type. If not, is used the PHP standard |
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* comparison. |
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* - If ``$left`` and ``$right`` are arrays, comparison is made by first by 'key' (as strings) and then by |
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* 'values' (using this method recursively). |
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* |
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* **Override:** |
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* You can override this method to implement a contextual sorting behaviour for `usort()` function. |
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* If you only need to compare instances of your class with other objects, implement `NelsonMartell\IComparable` |
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* instead. |
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* |
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* @param mixed $left Left object. |
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* @param mixed $right Right object. |
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* |
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* @return int|null |
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* Returns: |
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* - ``= 0`` if $left is considered equivalent to $other; |
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* - ``> 0`` if $left is considered greater than $other; |
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* - ``< 0`` if $left is considered less than $other; |
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* - ``null`` if $left can't be compared to $other . |
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* |
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* @see \strnatcmp() |
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* @see \usort() |
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* @see Arrays::compare() |
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* @see IComparable |
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* @see IComparable::compareTo() |
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* @see IComparer::compare() |
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* @see Numbers::compare() |
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* @see Text::compare() |
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* |
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* @since 1.0.0 Moved from `StrictObject::compare()`. |
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* */ |
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public static function compare($left, $right) |
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{ |
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$r = null; |
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if ($left instanceof IComparable) { |
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$r = $left->compareTo($right); |
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} elseif ($right instanceof IComparable) { |
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$r = $right->compareTo($left); |
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if ($r !== null) { |
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$r *= -1; // Invert result |
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} |
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} else { |
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$ltype = typeof($left); |
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$rtype = typeof($right); |
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if (typeof((bool) true)->isIn($left, $right)) { |
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// Boolean compare ----------------------------------------- |
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if (typeof((bool) true)->is($left, $right)) { |
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$r = (int) $left - (int) $right; |
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} else { |
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$r = null; |
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} |
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} elseif (typeof((int) 0)->isIn($left, $right) || typeof((float) 0)->isIn($left, $right)) { |
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// Numeric compare ----------------------------------------- |
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$r = Numbers::compare($left, $right); |
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} elseif (typeof((string) '')->isIn($left, $right)) { |
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// String compare ------------------------------------------ |
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$r = Text::compare($left, $right); |
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} elseif (typeof((array) [])->isIn($left, $right)) { |
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// Array compare ------------------------------------------- |
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$r = Arrays::compare($left, $right); |
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} else { |
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if ($ltype->isCustom()) { |
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if ($rtype->isCustom()) { |
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if ($left == $right) { |
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$r = 0; |
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} elseif ($ltype->equals($rtype)) { |
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$r = ($left > $right) ? +1 : -1; |
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} else { |
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$r = null; |
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} |
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} else { |
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$r = 1; |
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} |
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} elseif ($rtype->isCustom()) { |
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$r = -1; |
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} else { |
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$r = null; |
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} |
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} |
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} |
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return $r; |
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} |
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} |
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nelson6e65 /
php_nml
