Add ILIKE support to querybuilder

lib/private/db/querybuilder/expressionbuilder/expressionbuilder.php

@@ -276,6 +276,23 @@ class ExpressionBuilder implements IExpressionBuilder {
 		return $this->expressionBuilder->like($x, $y);
 	}
 
+	/**
+	 * Creates a ILIKE() comparison expression with the given arguments.
+	 *
+	 * @param string $x Field in string format to be inspected by ILIKE() comparison.
+	 * @param mixed $y Argument to be used in ILIKE() comparison.
+	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
+	 *                  required when comparing text fields for oci compatibility
+	 *
+	 * @return string
+	 * @since 9.0.0
+	 */
+	public function iLike($x, $y, $type = null) {
+		$x = $this->helper->quoteColumnName($x);
+		$y = $this->helper->quoteColumnName($y);
+		return $this->expressionBuilder->comparison("LOWER($x)", 'LIKE', "LOWER($y)");
+	}
+
 	/**
 	 * Creates a NOT LIKE() comparison expression with the given arguments.
 	 *

lib/private/db/querybuilder/expressionbuilder/mysqlexpressionbuilder.php

@@ -0,0 +1,39 @@
+<?php
+/**
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\DB\QueryBuilder\ExpressionBuilder;
+
+
+use OC\DB\QueryBuilder\QueryFunction;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+
+class MySqlExpressionBuilder extends ExpressionBuilder {
+
+	/**
+	 * @inheritdoc
+	 */
+	public function iLike($x, $y, $type = null) {
+		$x = $this->helper->quoteColumnName($x);
+		$y = $this->helper->quoteColumnName($y);
+		return $this->comparison($x, ' COLLATE utf8_general_ci LIKE', $y);
+	}
+
+}

lib/private/db/querybuilder/expressionbuilder/ociexpressionbuilder.php

@@ -149,4 +149,13 @@ class OCIExpressionBuilder extends ExpressionBuilder {
 
 		return parent::castColumn($column, $type);
 	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function iLike($x, $y, $type = null) {
+		$x = $this->helper->quoteColumnName($x);
+		$y = $this->helper->quoteColumnName($y);
+		return 'REGEXP_LIKE(`'.$x.'`, \'^\' || REPLACE('.$y.', \'%\', \'.*\') || \'$\', \'i\')';
+	}
 }

lib/private/db/querybuilder/expressionbuilder/pgsqlexpressionbuilder.php

@@ -42,4 +42,14 @@ class PgSqlExpressionBuilder extends ExpressionBuilder {
 
 		return parent::castColumn($column, $type);
 	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function iLike($x, $y, $type = null) {
+		$x = $this->helper->quoteColumnName($x);
+		$y = $this->helper->quoteColumnName($y);
+		return $this->comparison($x, 'ILIKE', $y);
+	}
+
 }

lib/private/db/querybuilder/querybuilder.php

@@ -21,9 +21,11 @@
 
 namespace OC\DB\QueryBuilder;
 
+use Doctrine\DBAL\Platforms\MySqlPlatform;
 use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
 use OC\DB\OracleConnection;
 use OC\DB\QueryBuilder\ExpressionBuilder\ExpressionBuilder;
+use OC\DB\QueryBuilder\ExpressionBuilder\MySqlExpressionBuilder;
 use OC\DB\QueryBuilder\ExpressionBuilder\OCIExpressionBuilder;
 use OC\DB\QueryBuilder\ExpressionBuilder\PgSqlExpressionBuilder;
 use OCP\DB\QueryBuilder\IQueryBuilder;
@@ -91,6 +93,8 @@ class QueryBuilder implements IQueryBuilder {
 			return new OCIExpressionBuilder($this->connection);
 		} else if ($this->connection->getDatabasePlatform() instanceof PostgreSqlPlatform) {
 			return new PgSqlExpressionBuilder($this->connection);
+		} else if ($this->connection->getDatabasePlatform() instanceof MySqlPlatform) {
+			return new MySqlExpressionBuilder($this->connection);
 		} else {
 			return new ExpressionBuilder($this->connection);
 		}

lib/public/db/querybuilder/iexpressionbuilder.php

@@ -263,6 +263,19 @@ interface IExpressionBuilder {
 	 */
 	public function notLike($x, $y, $type = null);
 
+	/**
+	 * Creates a ILIKE() comparison expression with the given arguments.
+	 *
+	 * @param string $x Field in string format to be inspected by ILIKE() comparison.
+	 * @param mixed $y Argument to be used in ILIKE() comparison.
+	 * @param mixed|null $type one of the IQueryBuilder::PARAM_* constants
+	 *                  required when comparing text fields for oci compatibility
+	 *
+	 * @return string
+	 * @since 9.0.0
+	 */
+	public function iLike($x, $y, $type = null);
+
 	/**
 	 * Creates a IN () comparison expression with the given arguments.
 	 *