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<?php |
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namespace MeadSteve\DiceApi\RequestHandler; |
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use MeadSteve\DiceApi\Counters\DiceCounter; |
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use MeadSteve\DiceApi\Dice; |
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use MeadSteve\DiceApi\UrlDiceGenerator; |
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use MeadSteve\DiceApi\Dice\UncreatableDiceException; |
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use MeadSteve\DiceApi\DiceDecorators\TotallyLegit; |
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use MeadSteve\DiceApi\Renderer\RendererCollection; |
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use MeadSteve\DiceApi\Renderer\UnknownRendererException; |
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use MeadSteve\DiceApi\Renderer\UnrenderableDiceException; |
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use Slim\Http\Request; |
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use Slim\Http\Response; |
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class DiceRequestHandler |
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{ |
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/** |
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* @var UrlDiceGenerator |
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*/ |
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private $diceGenerator; |
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/** |
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* @var DiceCounter |
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*/ |
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private $diceCounter; |
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/** |
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* @var RendererCollection |
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*/ |
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private $rendererCollection; |
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public function __construct( |
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UrlDiceGenerator $diceGenerator, |
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RendererCollection $rendererCollection, |
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DiceCounter $diceCounter |
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) { |
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$this->diceGenerator = $diceGenerator; |
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$this->rendererCollection = $rendererCollection; |
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$this->diceCounter = $diceCounter; |
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} |
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public function __invoke(Request $request, Response $response, $args) |
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{ |
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return $this->getDice($request, $response, $args); |
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} |
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public function getDice(Request $request, Response $response, $args): Response |
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{ |
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$diceResponse = $response |
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->withHeader("cache-control", "no-cache") |
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->withHeader('Access-Control-Allow-Origin', '*'); |
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try { |
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$diceCollection = $this->diceCollectionFromRequest($request, $args); |
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$this->diceCounter->count($diceCollection); |
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return $this->writeAppropriateFormatResponse($request, $diceResponse, $diceCollection); |
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} catch (UncreatableDiceException $creationError) { |
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return $diceResponse->withStatus(400) |
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->write("Unable to roll diceCollection: " . $creationError->getMessage()); |
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} catch (UnrenderableDiceException $renderError) { |
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return $diceResponse->withStatus(400) |
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->write("Unable to render request: " . $renderError->getMessage()); |
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} |
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} |
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/** |
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* Returns key value pairs mapping a url prefix to a handled content type |
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* so ["json" => "application/json", "etc" => "..."] |
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* @return string[] |
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*/ |
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public function contentTypesForPaths() : array |
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{ |
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return $this->rendererCollection->contentTypesForPaths(); |
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} |
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/** |
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* @param Request $request |
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* @param Response $response |
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* @param Dice[] $diceCollection |
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* @return Response |
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*/ |
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private function writeAppropriateFormatResponse(Request $request, Response $response, array $diceCollection) |
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{ |
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$acceptHeader = $request->getHeader('accept'); |
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$requestedContentType = $acceptHeader[0]; |
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try { |
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$renderer = $this->rendererCollection->newForAcceptType($requestedContentType); |
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return $response->write($renderer->renderDice($diceCollection)) |
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->withHeader("Content-Type", $renderer->contentType()); |
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} catch (UnknownRendererException $error) { |
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return $response->withStatus(406) |
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->write("Not sure how to respond with: " . $requestedContentType); |
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} |
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} |
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/** |
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* @param Dice[] $diceCollection |
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* @param Request $request |
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* @return Dice[] |
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*/ |
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private function makeDiceTotallyLegit(array $diceCollection, Request $request) |
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{ |
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$rolledValue = $request->getHeader('totally-legit')[0]; |
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return array_map( |
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function (Dice $dice) use ($rolledValue): Dice { |
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return new TotallyLegit($dice, (int) $rolledValue); |
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}, |
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$diceCollection |
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); |
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} |
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/** |
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* @param Request $request |
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* @param mixed[] $args |
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* @return Dice[] |
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*/ |
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private function diceCollectionFromRequest(Request $request, array $args) |
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{ |
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$diceCollection = $this->diceGenerator->diceFromUrlString($args['dice']); |
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if ($request->hasHeader('totally-legit')) { |
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return $this->makeDiceTotallyLegit($diceCollection, $request); |
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} |
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return $diceCollection; |
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} |
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} |
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meadsteve /
DiceApi
