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Editing: DocumentMapper.php

<?php

/**
 * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace OCA\Text\Db;

use Generator;
use OCP\AppFramework\Db\DoesNotExistException;
use OCP\AppFramework\Db\QBMapper;
use OCP\DB\QueryBuilder\IQueryBuilder;
use OCP\IDBConnection;

/** @extends QBMapper<Document> */
class DocumentMapper extends QBMapper {
	public function __construct(IDBConnection $db) {
		parent::__construct($db, 'text_documents', Document::class);
	}

/**
	 * @param $documentId
	 * @return Document
	 * @throws DoesNotExistException
	 */
	public function find(int $documentId): Document {
		/* @var $qb IQueryBuilder */
		$qb = $this->db->getQueryBuilder();
		$result = $qb->select('*')
			->from($this->getTableName())
			->where($qb->expr()->eq('id', $qb->createNamedParameter($documentId)))
			->executeQuery();

$data = $result->fetch();
		$result->closeCursor();
		if ($data === false) {
			throw new DoesNotExistException('Document doesn\'t exist');
		}
		return Document::fromRow($data);
	}

public function findAll(): Generator {
		$qb = $this->db->getQueryBuilder();
		$result = $qb->select('*')
			->from($this->getTableName())
			->executeQuery();
		try {
			while ($row = $result->fetch()) {
				yield $this->mapRowToEntity($row);
			}
		} finally {
			$result->closeCursor();
		}
	}

public function countAll(): int {
		$qb = $this->db->getQueryBuilder();
		$qb->select($qb->func()->count('id'))
			->from($this->getTableName());
		$result = $qb->executeQuery();
		$count = (int)$result->fetchOne();
		$result->closeCursor();
		return $count;
	}

public function clearAll(): void {
		$qb = $this->db->getQueryBuilder();
		$qb->delete($this->getTableName())
			->executeStatement();
	}
}

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