<?php
declare(strict_types=1);
namespace Butschster\ContextGenerator\Source\GitDiff;
use Butschster\ContextGenerator\Application\Logger\LoggerPrefix;
use Butschster\ContextGenerator\Lib\Content\ContentBuilderFactory;
use Butschster\ContextGenerator\Lib\Finder\FinderResult;
use Butschster\ContextGenerator\Modifier\ModifiersApplierInterface;
use Butschster\ContextGenerator\Source\Fetcher\SourceFetcherInterface;
use Butschster\ContextGenerator\Source\GitDiff\RenderStrategy\Enum\RenderStrategyEnum;
use Butschster\ContextGenerator\Source\GitDiff\RenderStrategy\RenderStrategyFactory;
use Butschster\ContextGenerator\Source\GitDiff\RenderStrategy\RenderStrategyInterface;
use Butschster\ContextGenerator\Source\SourceInterface;
use Psr\Log\LoggerInterface;
use Symfony\Component\Finder\SplFileInfo;
/**
* Fetcher for git commit diffs
* @implements SourceFetcherInterface<GitDiffSource>
*/
final readonly class GitDiffSourceFetcher implements SourceFetcherInterface
{
public function __construct(
private GitDiffFinder $finder,
private ContentBuilderFactory $builderFactory = new ContentBuilderFactory(),
private RenderStrategyFactory $renderStrategyFactory = new RenderStrategyFactory(),
#[LoggerPrefix(prefix: 'commit-diff-source')]
private ?LoggerInterface $logger = null,
) {}
public function supports(SourceInterface $source): bool
{
$isSupported = $source instanceof GitDiffSource;
$this->logger?->debug('Checking if source is supported', [
'sourceType' => $source::class,
'isSupported' => $isSupported,
]);
return $isSupported;
}
public function fetch(SourceInterface $source, ModifiersApplierInterface $modifiersApplier): string
{
if (!$source instanceof GitDiffSource) {
$errorMessage = 'Source must be an instance of GitDiffSource';
$this->logger?->error($errorMessage, [
'sourceType' => $source::class,
]);
throw new \InvalidArgumentException($errorMessage);
}
$this->logger?->info('Fetching git diff source content', [
'description' => $source->getDescription(),
'repository' => $source->repository,
'commit' => $source->commit,
'hasModifiers' => !empty($source->modifiers),
]);
// Use the finder to get the diffs
$this->logger?->debug('Finding git diffs', [
'repository' => $source->repository,
'commit' => $source->commit,
]);
try {
$finderResult = $this->finder->find($source);
// Extract diffs from the finder result
$this->logger?->debug('Extracting diffs from finder result');
$diffs = $this->extractDiffsFromFinderResult($finderResult);
$this->logger?->debug('Diffs extracted', ['diffCount' => \count($diffs)]);
// Format the output using the specified render strategy
$this->logger?->debug('Using render strategy to format output', [
'strategy' => $source->renderConfig->strategy,
]);
$content = $this->renderOutput($diffs, $finderResult->treeView, $source);
$this->logger?->info('Git diff source content fetched successfully', [
'diffCount' => \count($diffs),
'contentLength' => \strlen($content),
'renderStrategy' => $source->renderConfig->strategy,
]);
return $content;
} catch (\Throwable $e) {
$this->logger?->error('Error fetching git diff content', [
'error' => $e->getMessage(),
'trace' => $e->getTraceAsString(),
]);
throw $e;
}
}
/**
* Extract diffs from the finder result
*
* @return array<string, array{file: string, diff: string, stats: string}>
*/
private function extractDiffsFromFinderResult(FinderResult $finderResult): array
{
$diffs = [];
$fileCount = $finderResult->count();
$this->logger?->debug('Processing files for diff extraction', ['fileCount' => $fileCount]);
foreach ($finderResult->files as $index => $file) {
if (!$file instanceof SplFileInfo) {
$this->logger?->warning('Skipping non-SplFileInfo file', [
'fileType' => $file::class,
'index' => $index,
]);
continue;
}
// Get the original path and diff content
$originalPath = \method_exists($file, 'getOriginalPath')
? $file->getOriginalPath()
: $file->getRelativePathname();
$this->logger?->debug('Processing diff file', [
'file' => $originalPath,
'index' => $index + 1,
'total' => $fileCount,
]);
$diffContent = $file->getContents();
// Get the stats for this file
$stats = '';
if (\method_exists($file, 'getStats')) {
$this->logger?->debug('Getting stats from file method');
$stats = $file->getStats();
} else {
$this->logger?->debug('Extracting stats from diff content');
// Try to extract stats from the diff content
\preg_match('/^(.*?)(?=diff --git)/s', $diffContent, $matches);
if (!empty($matches[1])) {
$stats = \trim($matches[1]);
$this->logger?->debug('Stats extracted from diff content');
} else {
$this->logger?->debug('No stats found in diff content');
}
}
$diffs[$originalPath] = [
'file' => $originalPath,
'diff' => $diffContent,
'stats' => $stats,
];
$this->logger?->debug('Diff processed', [
'file' => $originalPath,
'diffLength' => \strlen($diffContent),
'hasStats' => !empty($stats),
]);
}
$this->logger?->debug('All diffs extracted', ['diffCount' => \count($diffs)]);
return $diffs;
}
/**
* Render the diffs using the specified strategy
*
* @param array<string, array{file: string, diff: string, stats: string}> $diffs
*/
private function renderOutput(array $diffs, string $treeView, GitDiffSource $source): string
{
$this->logger?->debug('Creating content builder');
$builder = $this->builderFactory->create();
try {
// Handle empty diffs case
if (empty($diffs)) {
$this->logger?->info('No diffs found for commit range', ['commit' => $source->commit]);
$builder
->addTitle("Git Diff for Commit Range: {$source->commit}", 1)
->addText("No changes found in this commit range.");
return $builder->build();
}
$builder
->addTitle("Git Diff for Commit Range: {$source->commit}", 1)
->addTitle($source->getDescription(), 2)
->addTitle("Summary of Changes", 2)
->addTreeView($treeView);
// Get the appropriate render strategy
$strategy = $this->getRenderStrategy($source->renderConfig->strategy);
// Use the strategy to render the output
$content = $builder
->merge($strategy->render($diffs, $source->renderConfig))
->build();
$this->logger?->debug('Output rendered using strategy', [
'contentLength' => \strlen($content),
]);
return $content;
} catch (\Throwable $e) {
// Log the error and fall back to raw rendering if there's an issue with the strategy
$this->logger?->error('Error using render strategy, falling back to raw rendering', [
'strategy' => $source->renderConfig->strategy,
'error' => $e->getMessage(),
'trace' => $e->getTraceAsString(),
]);
return $builder->build();
}
}
/**
* Get the appropriate render strategy for the given strategy name
*/
private function getRenderStrategy(RenderStrategyEnum $strategy): RenderStrategyInterface
{
return $this->renderStrategyFactory->create($strategy);
}
}
