1 files changed, 108 insertions, 0 deletions
diff --git a/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php b/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php
new file mode 100644
index 00000000000..48dc1da6330
--- /dev/null
+++ b/lib/private/DB/QueryBuilder/FunctionBuilder/FunctionBuilder.php
@@ -0,0 +1,108 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2017 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OC\DB\QueryBuilder\FunctionBuilder;
+
+use OC\DB\Connection;
+use OC\DB\QueryBuilder\QueryFunction;
+use OC\DB\QueryBuilder\QuoteHelper;
+use OCP\DB\QueryBuilder\IFunctionBuilder;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\DB\QueryBuilder\IQueryFunction;
+use OCP\IDBConnection;
+
+class FunctionBuilder implements IFunctionBuilder {
+	/** @var IDBConnection|Connection */
+	protected $connection;
+
+	/** @var IQueryBuilder */
+	protected $queryBuilder;
+
+	/** @var QuoteHelper */
+	protected $helper;
+
+	public function __construct(IDBConnection $connection, IQueryBuilder $queryBuilder, QuoteHelper $helper) {
+		$this->connection = $connection;
+		$this->queryBuilder = $queryBuilder;
+		$this->helper = $helper;
+	}
+
+	public function md5($input): IQueryFunction {
+		return new QueryFunction('MD5(' . $this->helper->quoteColumnName($input) . ')');
+	}
+
+	public function concat($x, ...$expr): IQueryFunction {
+		$args = func_get_args();
+		$list = [];
+		foreach ($args as $item) {
+			$list[] = $this->helper->quoteColumnName($item);
+		}
+		return new QueryFunction(sprintf('CONCAT(%s)', implode(', ', $list)));
+	}
+
+	public function groupConcat($expr, ?string $separator = ','): IQueryFunction {
+		$separator = $this->connection->quote($separator);
+		return new QueryFunction('GROUP_CONCAT(' . $this->helper->quoteColumnName($expr) . ' SEPARATOR ' . $separator . ')');
+	}
+
+	public function substring($input, $start, $length = null): IQueryFunction {
+		if ($length) {
+			return new QueryFunction('SUBSTR(' . $this->helper->quoteColumnName($input) . ', ' . $this->helper->quoteColumnName($start) . ', ' . $this->helper->quoteColumnName($length) . ')');
+		} else {
+			return new QueryFunction('SUBSTR(' . $this->helper->quoteColumnName($input) . ', ' . $this->helper->quoteColumnName($start) . ')');
+		}
+	}
+
+	public function sum($field): IQueryFunction {
+		return new QueryFunction('SUM(' . $this->helper->quoteColumnName($field) . ')');
+	}
+
+	public function lower($field): IQueryFunction {
+		return new QueryFunction('LOWER(' . $this->helper->quoteColumnName($field) . ')');
+	}
+
+	public function add($x, $y): IQueryFunction {
+		return new QueryFunction($this->helper->quoteColumnName($x) . ' + ' . $this->helper->quoteColumnName($y));
+	}
+
+	public function subtract($x, $y): IQueryFunction {
+		return new QueryFunction($this->helper->quoteColumnName($x) . ' - ' . $this->helper->quoteColumnName($y));
+	}
+
+	public function count($count = '', $alias = ''): IQueryFunction {
+		$alias = $alias ? (' AS ' . $this->helper->quoteColumnName($alias)) : '';
+		$quotedName = $count === '' ? '*' : $this->helper->quoteColumnName($count);
+		return new QueryFunction('COUNT(' . $quotedName . ')' . $alias);
+	}
+
+	public function octetLength($field, $alias = ''): IQueryFunction {
+		$alias = $alias ? (' AS ' . $this->helper->quoteColumnName($alias)) : '';
+		$quotedName = $this->helper->quoteColumnName($field);
+		return new QueryFunction('OCTET_LENGTH(' . $quotedName . ')' . $alias);
+	}
+
+	public function charLength($field, $alias = ''): IQueryFunction {
+		$alias = $alias ? (' AS ' . $this->helper->quoteColumnName($alias)) : '';
+		$quotedName = $this->helper->quoteColumnName($field);
+		return new QueryFunction('CHAR_LENGTH(' . $quotedName . ')' . $alias);
+	}
+
+	public function max($field): IQueryFunction {
+		return new QueryFunction('MAX(' . $this->helper->quoteColumnName($field) . ')');
+	}
+
+	public function min($field): IQueryFunction {
+		return new QueryFunction('MIN(' . $this->helper->quoteColumnName($field) . ')');
+	}
+
+	public function greatest($x, $y): IQueryFunction {
+		return new QueryFunction('GREATEST(' . $this->helper->quoteColumnName($x) . ', ' . $this->helper->quoteColumnName($y) . ')');
+	}
+
+	public function least($x, $y): IQueryFunction {
+		return new QueryFunction('LEAST(' . $this->helper->quoteColumnName($x) . ', ' . $this->helper->quoteColumnName($y) . ')');
+	}
+}