Backup #615

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<?php

namespace Controller;

use Framework\Controller;
use Infrastructure\Formatter\ApiResponseFormatter;
use Infrastructure\SemanticExplorerRepository;

/**
 * RelationController - CRUD for Semantic Explorer Relations
 *
 * Extracted from SemanticExplorerController for SRP compliance.
 */
class RelationController extends Controller
{
    private SemanticExplorerRepository $repository;
    private ApiResponseFormatter $apiFormatter;

    public function __construct(
        ?SemanticExplorerRepository $repository = null,
        ?ApiResponseFormatter $apiFormatter = null
    ) {
        $this->repository = $repository ?? new SemanticExplorerRepository();
        $this->apiFormatter = $apiFormatter ?? new ApiResponseFormatter();
    }

    /**
     * GET /semantic-explorer/relationen
     * Beziehungen zwischen Entitaeten
     */
    public function index(): void
    {
        $type = $this->getString('type');

        $relations = $this->repository->getRelationsFiltered($type);
        $relationTypes = $this->repository->getRelationTypes();
        $stats = $this->repository->getRelationStats();

        $this->view('semantic-explorer.relationen', [
            'title' => 'Relationen',
            'relations' => $relations,
            'relationTypes' => $relationTypes,
            'stats' => $stats,
            'currentType' => $type,
        ]);
    }

    /**
     * GET /semantic-explorer/relationen/new
     */
    public function create(): void
    {
        $this->view('semantic-explorer.relationen.new', [
            'title' => 'Neue Relation',
            'entities' => $this->repository->getAllEntitiesSimple(),
            'relationTypes' => $this->repository->getRelationTypesList(),
        ]);
    }

    /**
     * POST /semantic-explorer/relationen
     */
    public function store(): void
    {
        $input = $this->getJsonInput();

        $sourceId = (int) ($input['source_entity_id'] ?? 0);
        $targetId = (int) ($input['target_entity_id'] ?? 0);
        $type = trim($input['relation_type'] ?? '');
        $strength = (float) ($input['strength'] ?? 1.0);

        if ($sourceId === 0 || $targetId === 0 || $type === '') {
            $this->json($this->apiFormatter->validationError('Alle Felder sind erforderlich'), 400);

            return;
        }

        try {
            $id = $this->repository->createRelation($sourceId, $targetId, $type, $strength);
            $this->json($this->apiFormatter->created($id, 'Relation erstellt'));
        } catch (\Exception $e) {
            $this->json($this->apiFormatter->error($e->getMessage(), 'SERVER_ERROR'), 500);
        }
    }

    /**
     * GET /semantic-explorer/relationen/{id}/edit
     */
    public function edit(int $id): void
    {
        $relation = $this->repository->getRelation($id);

        if ($relation === null) {
            $this->notFound('Relation nicht gefunden');
        }

        $this->view('semantic-explorer.relationen.edit', [
            'title' => 'Relation bearbeiten',
            'relation' => $relation,
            'relationTypes' => $this->repository->getRelationTypesList(),
        ]);
    }

    /**
     * POST /semantic-explorer/relationen/{id}
     */
    public function update(int $id): void
    {
        $input = $this->getJsonInput();

        $type = trim($input['relation_type'] ?? '');
        $strength = (float) ($input['strength'] ?? 1.0);

        if ($type === '') {
            $this->json($this->apiFormatter->validationError('Beziehungstyp ist erforderlich', ['relation_type' => 'Pflichtfeld']), 400);

            return;
        }

        try {
            $this->repository->updateRelation($id, $type, $strength);
            $this->json($this->apiFormatter->ok('Relation aktualisiert'));
        } catch (\Exception $e) {
            $this->json($this->apiFormatter->error($e->getMessage(), 'SERVER_ERROR'), 500);
        }
    }

    /**
     * POST /semantic-explorer/relationen/{id}/delete
     */
    public function delete(int $id): void
    {
        try {
            $this->repository->deleteRelation($id);
            $this->json($this->apiFormatter->ok('Relation gelöscht'));
        } catch (\Exception $e) {
            $this->json($this->apiFormatter->error($e->getMessage(), 'SERVER_ERROR'), 500);
        }
    }
}

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