project-manager/src/Http/Controllers/CardController.php

<?php

declare(strict_types=1);

namespace App\Http\Controllers;

use App\Exception\ApiException;
use App\Repository\CardRepository;
use App\Repository\ProjectRepository;
use App\Support\Validator;
use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;

/**
 * CRUD for the cards within one project. Every route first checks that the
 * parent project is owned by the authenticated user; otherwise it responds 404.
 */
final class CardController extends Controller
{
    private const TEXT_MAX = 1000;

    public function __construct(
        private readonly ProjectRepository $projects,
        private readonly CardRepository $cards,
    ) {
    }

    /**
     * GET /api/projects/{projectId}/cards
     */
    public function index(Request $request, Response $response, array $args): Response
    {
        $projectId = $this->requireOwnedProjectId($request, $args);

        return $this->json($response, [
            'cards' => array_map($this->present(...), $this->cards->allForProject($projectId)),
        ]);
    }

    /**
     * POST /api/projects/{projectId}/cards
     */
    public function store(Request $request, Response $response, array $args): Response
    {
        $projectId = $this->requireOwnedProjectId($request, $args);

        $validator = new Validator($this->body($request));
        $text = $validator->requiredString('text', self::TEXT_MAX);
        $complete = $validator->optionalBool('complete') ?? false;
        $position = $validator->optionalInt('position', 0);
        $validator->assert();

        $card = $this->cards->create($projectId, $text, $complete, $position);
        $this->projects->touch($projectId);

        return $this->json($response, ['card' => $this->present($card)], 201);
    }

    /**
     * GET /api/projects/{projectId}/cards/{cardId}
     */
    public function show(Request $request, Response $response, array $args): Response
    {
        $projectId = $this->requireOwnedProjectId($request, $args);

        return $this->json($response, ['card' => $this->present($this->requireCard($projectId, $args))]);
    }

    /**
     * PATCH /api/projects/{projectId}/cards/{cardId}
     */
    public function update(Request $request, Response $response, array $args): Response
    {
        $projectId = $this->requireOwnedProjectId($request, $args);
        $card = $this->requireCard($projectId, $args);

        $validator = new Validator($this->body($request));
        $fields = [];
        if ($validator->has('text')) {
            $fields['text'] = $validator->requiredString('text', self::TEXT_MAX);
        }
        if ($validator->has('complete')) {
            $fields['complete'] = $validator->optionalBool('complete');
        }
        if ($validator->has('position')) {
            $fields['position'] = $validator->optionalInt('position', 0);
        }
        if ($fields === [] && !$validator->failed()) {
            $validator->add('text', 'Provide at least one of: text, complete, position.');
        }
        $validator->assert();

        $updated = $this->cards->update($card['id'], $projectId, $fields);
        $this->projects->touch($projectId);

        return $this->json($response, ['card' => $this->present($updated)]);
    }

    /**
     * DELETE /api/projects/{projectId}/cards/{cardId}
     */
    public function destroy(Request $request, Response $response, array $args): Response
    {
        $projectId = $this->requireOwnedProjectId($request, $args);
        $this->cards->delete($this->requireCard($projectId, $args)['id']);
        $this->projects->touch($projectId);

        return $response->withStatus(204);
    }

    /**
     * PUT /api/projects/{projectId}/cards/order
     *
     * Body: { "card_ids": [3, 1, 2] } — every card in the project, exactly once,
     * in the desired order. Positions are rewritten to 0..n-1.
     */
    public function reorder(Request $request, Response $response, array $args): Response
    {
        $projectId = $this->requireOwnedProjectId($request, $args);

        $order = $this->body($request)['card_ids'] ?? null;
        if (!is_array($order) || array_filter($order, static fn ($id) => !is_int($id)) !== []) {
            throw new ApiException('card_ids must be an array of card IDs.', 422);
        }

        /** @var int[] $order */
        $expected = $this->cards->idsForProject($projectId);
        $given = $order;
        sort($given);
        sort($expected);

        if ($given !== $expected) {
            throw new ApiException('card_ids must contain every card in the project exactly once.', 422);
        }

        $cards = $this->cards->reorder($projectId, $order);
        $this->projects->touch($projectId);

        return $this->json($response, ['cards' => array_map($this->present(...), $cards)]);
    }

    /**
     * @param array<string, string> $args
     */
    private function requireOwnedProjectId(Request $request, array $args): int
    {
        $project = $this->projects->findOwnedBy((int) $args['projectId'], $this->user($request)['id']);

        if ($project === null) {
            throw new ApiException('Project not found.', 404);
        }

        return $project['id'];
    }

    /**
     * @param array<string, string> $args
     * @return array{id: int, project_id: int, text: string, complete: bool, position: int, created_at: string, updated_at: string}
     */
    private function requireCard(int $projectId, array $args): array
    {
        $card = $this->cards->findInProject((int) $args['cardId'], $projectId);

        if ($card === null) {
            throw new ApiException('Card not found.', 404);
        }

        return $card;
    }

    /**
     * @param array{id: int, project_id: int, text: string, complete: bool, position: int, created_at: string, updated_at: string} $card
     * @return array<string, mixed>
     */
    private function present(array $card): array
    {
        return [
            'id' => $card['id'],
            'project_id' => $card['project_id'],
            'text' => $card['text'],
            'complete' => $card['complete'],
            'position' => $card['position'],
            'created_at' => $card['created_at'],
            'updated_at' => $card['updated_at'],
        ];
    }
}