Permutation.php

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<?php
 
declare(strict_types=1);
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Frontend\Tests\Functional\SiteHandling\Framework\Builder;
 
use ‪TYPO3\CMS\Core\Utility\PermutationUtility;
 
class ‪Permutation
{
    private array ‪$targets;
 
    private array ‪$applicableSets;
 
    private ‪Variables ‪$variables;
 
    private array ‪$results = [];
 
    public static function ‪create(‪Variables ‪$variables): self
    {
        return new static(‪$variables);
    }
 
    private function ‪__construct(‪Variables ‪$variables)
    {
        $this->variables = ‪$variables;
    }
 
    public function ‪permute(): self
    {
        $this->results = [];
        foreach ($this->targets as $target) {
            if (!$target instanceof ‪TestSet) {
                throw new \LogicException('Expected DataSet', 1578045577);
            }
            $target = $target->withMergedVariables($this->variables);
            foreach (‪PermutationUtility::meltArrayItems($this->applicableSets) as $applicables) {
                try {
                    $this->results[] = $this->‪applyApplicables($target, ...$applicables);
                } catch (‪SkipException $exception) {
                    continue;
                }
            }
        }
        return $this;
    }
 
    private function ‪applyApplicables(‪TestSet $target, ‪Applicable ...$applicables): ‪TestSet
    {
        foreach ($applicables as $index => $applicable) {
            $target = $this->‪withVariableContext($target, $applicable, ...$applicables);
        }
        return $target->‪withMergedApplicables(...$applicables);
    }
 
    private function ‪withVariableContext(‪TestSet $target, ‪Applicable $candidate, ‪Applicable ...$applicables): ‪TestSet
    {
        if ($candidate instanceof ‪ApplicableConjunction) {
            foreach ($candidate->filter(VariablesContext::class) as $variableContext) {
                // in case SkipException is thrown, skip the whole(!) conjunction
                // (that's why this is not caught here explicitly)
                $target = $this->‪withVariableContext($target, $variableContext, ...$applicables);
            }
        } elseif ($candidate instanceof ‪VariablesContext) {
            // apply variables for matching VariableContext
            $targetApplicables = $this->‪includeTargetApplicables($target, ...$applicables);
            if ($candidate->matchesRequiredApplicables(...$targetApplicables)) {
                return $target->‪withMergedVariables($candidate->getVariables());
            }
            // otherwise don't apply variables & skip this TestSet
            throw new ‪SkipException('skip', 1578162207);
        }
        return $target;
    }
 
    public function ‪getResults(): array
    {
        return ‪$this->results;
    }
 
    public function ‪getTargetsForDataProvider(): array
    {
        $keys = array_map(
            static function (‪TestSet $testSet) {
                return $testSet->‪describe();
            },
            ‪$this->results
        );
        $values = array_map(
            static function (‪TestSet $testSet) {
                return [$testSet];
            },
            ‪$this->results
        );
        return array_combine($keys, $values);
    }
 
    public function ‪withTargets(‪TestSet ...‪$targets): self
    {
        $target = clone $this;
        $target->targets = ‪$targets;
        return $target;
    }
 
    public function ‪withApplicableSet(‪Applicable ...$applicables): self
    {
        $target = clone $this;
        $target->applicableSets[] = $applicables;
        return $target;
    }
 
    public function ‪withApplicableItems(array $applicableItems, ‪Applicable ...$applicables): self
    {
        $applicableItems = array_values($applicableItems);
        $applicableItems = array_merge($applicableItems, $applicables);
        return $this->‪withApplicableSet(...$applicableItems);
    }
 
    private function ‪includeTargetApplicables(‪TestSet $target, ‪Applicable ...$applicables): array
    {
        if (empty($target->‪getApplicables())) {
            return $applicables;
        }
        $targetApplicables = $applicables;
        foreach ($target->‪getApplicables() as $targetApplicable) {
            if (!in_array($targetApplicable, $targetApplicables, true)) {
                $targetApplicables[] = $targetApplicable;
            }
        }
        return $targetApplicables;
    }
}