1 files changed, 83 insertions, 0 deletions
diff --git a/lib/private/DB/PreparedStatement.php b/lib/private/DB/PreparedStatement.php
new file mode 100644
index 00000000000..54561ed96cd
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+++ b/lib/private/DB/PreparedStatement.php
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+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OC\DB;
+
+use Doctrine\DBAL\Exception;
+use Doctrine\DBAL\ParameterType;
+use Doctrine\DBAL\Statement;
+use OCP\DB\IPreparedStatement;
+use OCP\DB\IResult;
+use PDO;
+
+/**
+ * Adapts our public API to what doctrine/dbal exposed with 2.6
+ *
+ * The old dbal statement had stateful methods e.g. to fetch data from an executed
+ * prepared statement. To provide backwards compatibility to apps we need to make
+ * this class stateful. As soon as those now deprecated exposed methods are gone,
+ * we can limit the API of this adapter to the methods that map to the direct dbal
+ * methods without much magic.
+ */
+class PreparedStatement implements IPreparedStatement {
+	/** @var Statement */
+	private $statement;
+
+	/** @var IResult|null */
+	private $result;
+
+	public function __construct(Statement $statement) {
+		$this->statement = $statement;
+	}
+
+	public function closeCursor(): bool {
+		$this->getResult()->closeCursor();
+
+		return true;
+	}
+
+	public function fetch(int $fetchMode = PDO::FETCH_ASSOC) {
+		return $this->getResult()->fetch($fetchMode);
+	}
+
+	public function fetchAll(int $fetchMode = PDO::FETCH_ASSOC): array {
+		return $this->getResult()->fetchAll($fetchMode);
+	}
+
+	public function fetchColumn() {
+		return $this->getResult()->fetchOne();
+	}
+
+	public function fetchOne() {
+		return $this->getResult()->fetchOne();
+	}
+
+	public function bindValue($param, $value, $type = ParameterType::STRING): bool {
+		return $this->statement->bindValue($param, $value, $type);
+	}
+
+	public function bindParam($param, &$variable, $type = ParameterType::STRING, $length = null): bool {
+		return $this->statement->bindParam($param, $variable, $type, $length);
+	}
+
+	public function execute($params = null): IResult {
+		return ($this->result = new ResultAdapter($this->statement->execute($params)));
+	}
+
+	public function rowCount(): int {
+		return $this->getResult()->rowCount();
+	}
+
+	private function getResult(): IResult {
+		if ($this->result !== null) {
+			return $this->result;
+		}
+
+		throw new Exception('You have to execute the prepared statement before accessing the results');
+	}
+}