<?php
namespace Omeka\Api\Adapter;

use Doctrine\ORM\QueryBuilder;
use Omeka\Api\Request;
use Omeka\Entity\EntityInterface;
use Omeka\File\Validator;
use Omeka\Stdlib\ErrorStore;

class AssetAdapter extends AbstractEntityAdapter
{
    protected $sortFields = [
        'id' => 'id',
        'media_type' => 'mediaType',
        'name' => 'name',
        'extension' => 'extension',
    ];

    protected $scalarFields = [
        'id' => 'id',
        'media_type' => 'mediaType',
        'name' => 'name',
        'extension' => 'extension',
        'storage_id' => 'storageId',
        'alt_text' => 'altText',
        'owner' => 'owner',
    ];

    public function getResourceName()
    {
        return 'assets';
    }

    public function getRepresentationClass()
    {
        return \Omeka\Api\Representation\AssetRepresentation::class;
    }

    public function getEntityClass()
    {
        return \Omeka\Entity\Asset::class;
    }

    public function buildQuery(QueryBuilder $qb, array $query)
    {
        if (isset($query['owner_id']) && is_numeric($query['owner_id'])) {
            $userAlias = $this->createAlias();
            if (0 == $query['owner_id']) {
                // Search assets without an owner.
                $qb->andWhere($qb->expr()->isNull('omeka_root.owner'));
            } else {
                $qb->innerJoin(
                    'omeka_root.owner',
                    $userAlias
                );
                $qb->andWhere($qb->expr()->eq(
                    "$userAlias.id",
                    $this->createNamedParameter($qb, $query['owner_id']))
                );
            }
        }
    }

    public function hydrate(Request $request, EntityInterface $entity, ErrorStore $errorStore)
    {
        $data = $request->getContent();

        if (Request::CREATE === $request->getOperation()) {
            $fileData = $request->getFileData();
            if (!isset($fileData['file'])) {
                $errorStore->addError('file', 'No file was uploaded');
                return;
            }

            $uploader = $this->getServiceLocator()->get('Omeka\File\Uploader');
            $tempFile = $uploader->upload($fileData['file'], $errorStore);
            if (!$tempFile) {
                return;
            }

            $tempFile->setSourceName($fileData['file']['name']);
            $config = $this->getServiceLocator()->get('Config');
            $validator = new Validator($config['api_assets']['allowed_media_types'], $config['api_assets']['allowed_extensions']);
            if (!$validator->validate($tempFile, $errorStore)) {
                return;
            }

            $this->hydrateOwner($request, $entity);
            $entity->setStorageId($tempFile->getStorageId());
            $entity->setExtension($tempFile->getExtension());
            $entity->setMediaType($tempFile->getMediaType());
            $entity->setName($request->getValue('o:name', $fileData['file']['name']));

            $tempFile->storeAsset();
            $tempFile->delete();
        } else {
            if ($this->shouldHydrate($request, 'o:name')) {
                $entity->setName($request->getValue('o:name'));
            }
        }

        if ($this->shouldHydrate($request, 'o:alt_text')) {
            $entity->setAltText($request->getValue('o:alt_text'));
        }
    }

    public function validateEntity(EntityInterface $entity, ErrorStore $errorStore)
    {
        // Don't add this name error if we have any other errors already
        if ($errorStore->hasErrors()) {
            return;
        }

        $name = $entity->getName();
        if (!is_string($name) || $name === '') {
            $errorStore->addError('o:name', 'An asset must have a name.');
        }
    }
}
