81 lines
2.2 KiB
PHP
81 lines
2.2 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Joas Schilling <coding@schilljs.com>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\DB\QueryBuilder;
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use OCP\DB\QueryBuilder\ILiteral;
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use OCP\DB\QueryBuilder\IParameter;
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use OCP\DB\QueryBuilder\IQueryFunction;
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class QuoteHelper {
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/**
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* @param array|string|ILiteral|IParameter|IQueryFunction $strings string, Literal or Parameter
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* @return array|string
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*/
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public function quoteColumnNames($strings) {
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if (!is_array($strings)) {
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return $this->quoteColumnName($strings);
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}
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$return = [];
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foreach ($strings as $string) {
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$return[] = $this->quoteColumnName($string);
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}
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return $return;
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}
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/**
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* @param string|ILiteral|IParameter|IQueryFunction $string string, Literal or Parameter
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* @return string
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*/
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public function quoteColumnName($string) {
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if ($string instanceof IParameter || $string instanceof ILiteral || $string instanceof IQueryFunction) {
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return (string) $string;
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}
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if ($string === null || $string === 'null' || $string === '*') {
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return $string;
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}
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if (!is_string($string)) {
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throw new \InvalidArgumentException('Only strings, Literals and Parameters are allowed');
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}
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$string = str_replace(' AS ', ' as ', $string);
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if (substr_count($string, ' as ')) {
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return implode(' as ', array_map([$this, 'quoteColumnName'], explode(' as ', $string, 2)));
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}
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if (substr_count($string, '.')) {
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list($alias, $columnName) = explode('.', $string, 2);
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if ($columnName === '*') {
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return $string;
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}
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return $alias . '.`' . $columnName . '`';
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}
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return '`' . $string . '`';
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}
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}
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