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<?php |
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/* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* This software consists of voluntary contributions made by many individuals |
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* and is licensed under the MIT license. For more information, see |
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* <http://www.doctrine-project.org>. |
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*/ |
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namespace Baleen\Migrations\Delta\Collection\Resolver; |
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use Baleen\Migrations\Delta\Collection\Collection; |
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use Baleen\Migrations\Delta\DeltaInterface; |
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/** |
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* Class OffsetResolver. |
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* |
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* Resolves aliases in the format: ID{OPERATOR}[COUNT] |
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* |
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* Operators: |
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* + will add |
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* -, ^ or ~ will subtract |
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* |
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* Repeat operators consecutively works as a shortcut for COUNT. E.g. ++ will set COUNT to 2. |
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* |
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* Count (optional) should be a number if present and takes precedence over the previous rule. |
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* |
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* Example aliases: 123+, 123++ (same as 123+2), 123+++9 (will be simplified to 123+9) |
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* |
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* @author Gabriel Somoza <[email protected]> |
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*/ |
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final class OffsetResolver extends AbstractResolver |
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{ |
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const PATTERN = '/^(.*?)([\+\-\~\^]+)([0-9]+)?$/'; |
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/** |
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* @{inheritdoc} |
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* |
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* IMPROVE: this method has an NPath complexity of 400. The configured NPath complexity threshold is 200. |
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* |
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* @SuppressWarnings(PHPMD.NPathComplexity) |
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* |
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* @param string $alias |
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* @param Collection $collection |
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* |
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* @return DeltaInterface|null |
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*/ |
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protected function doResolve($alias, Collection $collection) |
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{ |
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// parse alias |
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$matches = []; |
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if (!preg_match(self::PATTERN, $alias, $matches)) { |
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return null; |
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} |
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list(, $newAlias, $operator) = $matches; |
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// resolve the new alias (this will allow to resolve e.g. HEAD-1) |
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$absoluteVersion = $collection->get($newAlias); |
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if (null === $absoluteVersion) { |
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return null; |
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} |
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// calculate the offset |
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$count = !isset($matches[3]) ? strlen($operator) : (int) $matches[3]; |
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if (strlen($operator) > 1) { |
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$operator = substr($operator, 0, 1); |
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} |
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$multiplier = $operator === '+' ? 1 : -1; |
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$offset = $count * $multiplier; |
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// find version by absolute getPosition + offset |
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$absolutePos = $collection->getPosition($absoluteVersion); |
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return $collection->getByPosition($absolutePos + $offset); |
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} |
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} |
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baleen /
migrations
