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<?php |
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/** |
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* Copyright (c) Andreas Heigl<[email protected]> |
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* Permission is hereby granted, free of charge, to any person obtaining a copy |
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* of this software and associated documentation files (the "Software"), to deal |
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* in the Software without restriction, including without limitation the rights |
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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* copies of the Software, and to permit persons to whom the Software is |
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* furnished to do so, subject to the following conditions: |
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* The above copyright notice and this permission notice shall be included in |
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* all copies or substantial portions of the Software. |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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* THE SOFTWARE. |
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* |
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* @author Andreas Heigl<[email protected]> |
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* @copyright Andreas Heigl |
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* @license http://www.opensource.org/licenses/mit-license.php MIT-License |
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* @since 11.10.2016 |
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* @link http://github.com/heiglandreas/org.heigl.DateIntervalComparator |
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*/ |
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namespace Org_Heigl\DateIntervalComparator; |
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use DateInterval; |
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use UnexpectedValueException; |
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class DateIntervalComparator |
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{ |
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private $safe = false; |
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public function safe($safe = true) |
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{ |
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$this->safe = $safe; |
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} |
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/** |
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* COmpare the two date intervals. |
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* |
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* If the first contains a larger timespan we return 1, if the second contains more |
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* we return -1 and when they are equals we return 0. |
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* |
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* @param DateInterval $first |
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* @param DateInterval $second |
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* |
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* @return int |
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*/ |
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public function compare(DateInterval $first, DateInterval $second) |
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{ |
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if ($this->safe) { |
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$this->safecheck($first); |
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$this->safecheck($second); |
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} |
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if (0 !== $year = $this->compareValue($first->y, $second->y)) { |
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return $year; |
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} |
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if (0 !== $month = $this->compareValue($first->m, $second->m)) { |
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return $month; |
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} |
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if (0 !== $day = $this->compareValue($first->d, $second->d)) { |
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return $day; |
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} |
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if (0 !== $hour = $this->compareValue($first->h, $second->h)) { |
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return $hour; |
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} |
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if (0 !== $minute = $this->compareValue($first->i, $second->i)) { |
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return $minute; |
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} |
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if (0 !== $second = $this->compareValue($first->s, $second->s)) { |
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return $second; |
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} |
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return 0; |
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} |
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private function compareValue(int $a, int $b): int |
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{ |
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if ($a < $b) { |
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return -1; |
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} |
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if ($a > $b) { |
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return 1; |
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} |
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return 0; |
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} |
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private function safecheck(DateInterval $interval): void |
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{ |
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if ($interval->m > 12) { |
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throw new UnexpectedValueException('Month exceeds value 12'); |
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} |
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if ($interval->d > 31) { |
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throw new UnexpectedValueException('Day exceeds value 31'); |
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} |
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// 25 due to DST-Transitions |
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if ($interval->h > 25) { |
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throw new UnexpectedValueException('Hour exceeds value 25'); |
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} |
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if ($interval->i > 60) { |
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throw new UnexpectedValueException('Minute exceeds value 60'); |
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} |
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// 61 due to leap-seconds |
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if ($interval->s > 61) { |
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throw new UnexpectedValueException('Second exceeds value 61'); |
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} |
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} |
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} |
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heiglandreas /
DateIntervalComparator
