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<?php
/**
* Copyright since 2007 PrestaShop SA and Contributors
* PrestaShop is an International Registered Trademark & Property of PrestaShop SA
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.md.
* It is also available through the world-wide-web at this URL:
* https://opensource.org/licenses/OSL-3.0
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to https://devdocs.prestashop.com/ for more information.
*
* @author PrestaShop SA and Contributors <contact@prestashop.com>
* @copyright Since 2007 PrestaShop SA and Contributors
* @license https://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
*/
/**
* SQL query builder.
*
* @since 1.5.0.1
*/
class DbQueryCore
{
/**
* List of data to build the query.
*
* @var array
*/
protected $query = [
'type' => 'SELECT',
'select' => [],
'from' => [],
'join' => [],
'where' => [],
'group' => [],
'having' => [],
'order' => [],
'limit' => ['offset' => 0, 'limit' => 0],
];
/**
* Sets type of the query.
*
* @param string $type SELECT|DELETE
*
* @return $this
*/
public function type($type)
{
$types = ['SELECT', 'DELETE'];
if (!empty($type) && in_array($type, $types)) {
$this->query['type'] = $type;
}
return $this;
}
/**
* Adds fields to SELECT clause.
*
* @param string $fields List of fields to concat to other fields
*
* @return $this
*/
public function select($fields)
{
if (!empty($fields)) {
$this->query['select'][] = $fields;
}
return $this;
}
/**
* Sets table for FROM clause.
*
* @param string|DbQuery $table Table name
* @param string|null $alias Table alias
*
* @return $this
*/
public function from($table, $alias = null)
{
if (!empty($table)) {
if ($table instanceof DbQuery) {
$query = '(' . $table->build() . ')';
} else {
$query = '`' . _DB_PREFIX_ . $table . '`';
}
$this->query['from'][] = $query . ($alias ? ' ' . $alias : '');
}
return $this;
}
/**
* Adds JOIN clause
* E.g. $this->join('RIGHT JOIN '._DB_PREFIX_.'product p ON ...');.
*
* @param string $join Complete string
*
* @return $this
*/
public function join($join)
{
if (!empty($join)) {
$this->query['join'][] = $join;
}
return $this;
}
/**
* Adds a LEFT JOIN clause.
*
* @param string $table Table name (without prefix)
* @param string|null $alias Table alias
* @param string|null $on ON clause
*
* @return $this
*/
public function leftJoin($table, $alias = null, $on = null)
{
return $this->join('LEFT JOIN `' . _DB_PREFIX_ . bqSQL($table) . '`' . ($alias ? ' `' . pSQL($alias) . '`' : '') . ($on ? ' ON ' . $on : ''));
}
/**
* Adds an INNER JOIN clause
* E.g. $this->innerJoin('product p ON ...').
*
* @param string $table Table name (without prefix)
* @param string|null $alias Table alias
* @param string|null $on ON clause
*
* @return $this
*/
public function innerJoin($table, $alias = null, $on = null)
{
return $this->join('INNER JOIN `' . _DB_PREFIX_ . bqSQL($table) . '`' . ($alias ? ' `' . pSQL($alias) . '`' : '') . ($on ? ' ON ' . $on : ''));
}
/**
* Adds a LEFT OUTER JOIN clause.
*
* @param string $table Table name (without prefix)
* @param string|null $alias Table alias
* @param string|null $on ON clause
*
* @return $this
*/
public function leftOuterJoin($table, $alias = null, $on = null)
{
return $this->join('LEFT OUTER JOIN `' . _DB_PREFIX_ . bqSQL($table) . '`' . ($alias ? ' `' . pSQL($alias) . '`' : '') . ($on ? ' ON ' . $on : ''));
}
/**
* Adds a NATURAL JOIN clause.
*
* @param string $table Table name (without prefix)
* @param string|null $alias Table alias
*
* @return $this
*/
public function naturalJoin($table, $alias = null)
{
return $this->join('NATURAL JOIN `' . _DB_PREFIX_ . bqSQL($table) . '`' . ($alias ? ' `' . pSQL($alias) . '`' : ''));
}
/**
* Adds a RIGHT JOIN clause.
*
* @param string $table Table name (without prefix)
* @param string|null $alias Table alias
* @param string|null $on ON clause
*
* @return $this
*/
public function rightJoin($table, $alias = null, $on = null)
{
return $this->join('RIGHT JOIN `' . _DB_PREFIX_ . bqSQL($table) . '`' . ($alias ? ' `' . pSQL($alias) . '`' : '') . ($on ? ' ON ' . $on : ''));
}
/**
* Adds a restriction in WHERE clause (each restriction will be separated by AND statement).
*
* @param string $restriction
*
* @return $this
*/
public function where($restriction)
{
if (!empty($restriction)) {
$this->query['where'][] = $restriction;
}
return $this;
}
/**
* Adds a restriction in HAVING clause (each restriction will be separated by AND statement).
*
* @param string $restriction
*
* @return $this
*/
public function having($restriction)
{
if (!empty($restriction)) {
$this->query['having'][] = $restriction;
}
return $this;
}
/**
* Adds an ORDER BY restriction.
*
* @param string $fields List of fields to sort. E.g. $this->order('myField, b.mySecondField DESC')
*
* @return $this
*/
public function orderBy($fields)
{
if (!empty($fields)) {
$this->query['order'][] = $fields;
}
return $this;
}
/**
* Adds a GROUP BY restriction.
*
* @param string $fields List of fields to group. E.g. $this->group('myField1, myField2')
*
* @return $this
*/
public function groupBy($fields)
{
if (!empty($fields)) {
$this->query['group'][] = $fields;
}
return $this;
}
/**
* Sets query offset and limit.
*
* @param int $limit
* @param int $offset
*
* @return $this
*/
public function limit($limit, $offset = 0)
{
$offset = (int) $offset;
if ($offset < 0) {
$offset = 0;
}
$this->query['limit'] = [
'offset' => $offset,
'limit' => (int) $limit,
];
return $this;
}
/**
* Generates query and return SQL string.
*
* @return string
*
* @throws PrestaShopException
*/
public function build()
{
if ($this->query['type'] == 'SELECT') {
$sql = 'SELECT ' . ((($this->query['select'])) ? implode(",\n", $this->query['select']) : '*') . "\n";
} else {
$sql = $this->query['type'] . ' ';
}
if (!$this->query['from']) {
throw new PrestaShopException('Table name not set in DbQuery object. Cannot build a valid SQL query.');
}
$sql .= 'FROM ' . implode(', ', $this->query['from']) . "\n";
if ($this->query['join']) {
$sql .= implode("\n", $this->query['join']) . "\n";
}
if ($this->query['where']) {
$sql .= 'WHERE (' . implode(') AND (', $this->query['where']) . ")\n";
}
if ($this->query['group']) {
$sql .= 'GROUP BY ' . implode(', ', $this->query['group']) . "\n";
}
if ($this->query['having']) {
$sql .= 'HAVING (' . implode(') AND (', $this->query['having']) . ")\n";
}
if ($this->query['order']) {
$sql .= 'ORDER BY ' . implode(', ', $this->query['order']) . "\n";
}
if ($this->query['limit']['limit']) {
$limit = $this->query['limit'];
$sql .= 'LIMIT ' . ($limit['offset'] ? $limit['offset'] . ', ' : '') . $limit['limit'];
}
return $sql;
}
/**
* Converts object to string.
*
* @return string
*/
public function __toString()
{
return $this->build();
}
/**
* Get query.
*
* @return array
*/
public function getQuery(): array
{
return $this->query;
}
}
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