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<?php |
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declare(strict_types=1); |
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namespace DependencyAnalyzer\Inspector; |
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use DependencyAnalyzer\DependencyGraph; |
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use DependencyAnalyzer\DependencyGraph\Path; |
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use DependencyAnalyzer\Exceptions\LogicException; |
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use DependencyAnalyzer\Inspector\Responses\CycleDetectorResponse; |
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class CycleDetector |
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{ |
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/** |
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* @var Path[] |
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*/ |
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protected $cycles = []; |
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public function inspect(DependencyGraph $graph): CycleDetectorResponse |
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{ |
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$subGraphs = $this->collectConnectedSubGraphs($graph); |
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foreach ($subGraphs as $subGraph) { |
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$subGraph->walkOnPath([$this, 'checkCycle']); |
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} |
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$response = new CycleDetectorResponse(); |
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foreach ($this->cycles as $cycle) { |
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$response->addCycle($cycle->toArray()); |
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} |
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return $response; |
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} |
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public function checkCycle(Path $path): void |
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{ |
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if ($path->isSimpleCycle()) { |
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$this->addCycle($path); |
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} |
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} |
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protected function addCycle(Path $path): void |
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{ |
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foreach ($this->cycles as $cycle) { |
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if ($cycle->isEqual($path)) { |
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return; |
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} |
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} |
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$this->cycles[] = $path; |
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} |
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/** |
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* @param DependencyGraph $graph |
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* @return DependencyGraph[] |
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*/ |
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protected function collectConnectedSubGraphs(DependencyGraph $graph): array |
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{ |
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$subGraphs = []; |
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$visited = []; |
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foreach ($graph->getClasses()->getMap() as $id => $vertex) { |
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if (!isset($visited[$id])) { |
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$subGraphs[] = $subGraph = $graph->getConnectedSubGraphsStartFrom($vertex); |
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foreach ($subGraph->getClasses() as $subGraphVertex) { |
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$visited[$subGraphVertex->getId()] = true; |
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} |
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} |
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} |
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if ($graph->count() !== count($visited)) { |
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throw new LogicException(); |
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} |
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return $subGraphs; |
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} |
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} |
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nazonohito51 /
dependency-analyzer
