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<?php |
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/** |
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* Static Analysis Results Baseliner (sarb). |
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* |
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* (c) Dave Liddament |
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* |
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* For the full copyright and licence information please view the LICENSE file distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace DaveLiddament\StaticAnalysisResultsBaseliner\Domain\HistoryAnalyser\UnifiedDiffParser; |
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use DaveLiddament\StaticAnalysisResultsBaseliner\Domain\HistoryAnalyser\UnifiedDiffParser\internal\DiffParseException; |
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use DaveLiddament\StaticAnalysisResultsBaseliner\Domain\HistoryAnalyser\UnifiedDiffParser\internal\FileMutationsBuilder; |
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use DaveLiddament\StaticAnalysisResultsBaseliner\Domain\HistoryAnalyser\UnifiedDiffParser\internal\FindFileDiffStartState; |
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/** |
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* Parses a Unified Diff (see docs folder). |
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*/ |
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class Parser |
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{ |
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/** |
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* @throws ParseException |
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*/ |
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public function parseDiff(string $diffAsString): FileMutations |
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{ |
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$fileMutationsBuilder = new FileMutationsBuilder(); |
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$state = new FindFileDiffStartState($fileMutationsBuilder); |
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$lines = $this->getLines($diffAsString); |
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foreach ($lines as $number => $line) { |
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try { |
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$state = $state->processLine($line); |
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} catch (DiffParseException $e) { |
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$lineNumber = $number + 1; |
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throw ParseException::fromDiffParseException((string) $lineNumber, $e); |
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} |
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} |
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try { |
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$state->finish(); |
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} catch (DiffParseException $e) { |
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throw ParseException::fromDiffParseException(ParseException::UNEXPECTED_END_OF_FILE, $e); |
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} |
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return $fileMutationsBuilder->build(); |
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} |
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/** |
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* @return array<int,string> |
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*/ |
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private function getLines(string $diffAsString): array |
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{ |
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$lines = explode(PHP_EOL, $diffAsString); |
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// Strip trailing empty lines from diff |
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do { |
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$finalLineIndex = count($lines) - 1; |
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$removeFinalLine = ($finalLineIndex >= 0) && ('' === trim($lines[$finalLineIndex])); |
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if ($removeFinalLine) { |
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unset($lines[$finalLineIndex]); |
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} |
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} while ($removeFinalLine); |
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return $lines; |
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} |
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} |
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DaveLiddament /
sarb
