public function __invoke($request, $response, $next)
{
$path = $request->getUri()->getPath();
if (strpos($path, $this->urlPrefix) !== 0) {
// Not an asset request.
return $next($request, $response);
}
$factory = new Factory($this->config);
$assets = $factory->assetCollection();
$targetName = substr($path, strlen($this->urlPrefix));
if (!$assets->contains($targetName)) {
// Unknown build.
return $next($request, $response);
}
try {
$build = $assets->get($targetName);
$compiler = $factory->cachedCompiler($this->outputDir);
$contents = $compiler->generate($build);
} catch (Exception $e) {
// Could not build the asset.
$response->getBody()->write($e->getMessage());
return $response->withStatus(400)->withHeader('Content-Type', 'text/plain');
}
return $this->respond($response, $contents, $build->ext());
}