*/ protected Iterator $oldIter; /** @var Iterator */ protected Iterator $newIter; /** * Constructor * * @param Iterator $oldIter Iterator for the old index * @param Iterator $newIter Iterator for the new index */ public function __construct(Iterator $oldIter, Iterator $newIter) { $this->oldIter = $oldIter; $this->newIter = $newIter; } /** * Run the comparison process * * @return void */ public function run(): void { while ($this->newIter->valid() || $this->oldIter->valid()) { if ($this->newIter->valid() && !$this->oldIter->valid()) { $this->handleNew($this->newIter->current()); $this->newIter->next(); continue; } if (!$this->newIter->valid() && $this->oldIter->valid()) { $this->handleDeleted($this->oldIter->current()); $this->oldIter->next(); continue; } $newCurrent = $this->newIter->current(); $oldCurrent = $this->oldIter->current(); if ($newCurrent->getPath() === $oldCurrent->getPath()) { if ( $newCurrent->getSize() !== $oldCurrent->getSize() || $newCurrent->getMTime() !== $oldCurrent->getMTime() || ($newCurrent->getHash() !== '' && ($newCurrent->getHash() !== $oldCurrent->getHash())) ) { $this->handleModified($newCurrent, $oldCurrent); } else { $this->handleUnchanged($newCurrent); } $this->newIter->next(); $this->oldIter->next(); continue; } if ($newCurrent->getPath() < $oldCurrent->getPath()) { $this->handleNew($newCurrent); $this->newIter->next(); } else { $this->handleDeleted($oldCurrent); $this->oldIter->next(); } } } /** * Handle a new file/directory * * @param FileNodeInfo $node The new node * * @return mixed */ abstract protected function handleNew(FileNodeInfo $node): mixed; /** * Handle a modified file/directory * * @param FileNodeInfo $newNode The new version of the node * @param FileNodeInfo $oldNode The old version of the node * * @return mixed */ abstract protected function handleModified(FileNodeInfo $newNode, FileNodeInfo $oldNode): mixed; /** * Handle a deleted file/directory * * @param FileNodeInfo $node The deleted node * * @return mixed */ abstract protected function handleDeleted(FileNodeInfo $node): mixed; /** * Handle an unchanged file/directory * * @param FileNodeInfo $node The unchanged node * * @return mixed */ abstract protected function handleUnchanged(FileNodeInfo $node): mixed; }