Current File : //var/www/projetos/suporte.iigd.com.br.old/src/System/Diagnostic/AbstractDatabaseChecker.php
<?php
/**
* ---------------------------------------------------------------------
*
* GLPI - Gestionnaire Libre de Parc Informatique
*
* http://glpi-project.org
*
* @copyright 2015-2022 Teclib' and contributors.
* @copyright 2003-2014 by the INDEPNET Development Team.
* @licence https://www.gnu.org/licenses/gpl-3.0.html
*
* ---------------------------------------------------------------------
*
* LICENSE
*
* This file is part of GLPI.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* ---------------------------------------------------------------------
*/
namespace Glpi\System\Diagnostic;
use DBmysql;
/**
* @since 10.0.0
*/
abstract class AbstractDatabaseChecker
{
/**
* DB instance.
*
* @var DBmysql
*/
protected $db;
/**
* Local cache for tables columns.
*
* @var array
*/
private $columns = [];
/**
* Local cache for tables indexes.
*
* @var array
*/
private $indexes = [];
/**
* @param DBmysql $db DB instance.
*/
public function __construct(DBmysql $db)
{
$this->db = $db;
}
/**
* Return list of column names for given table.
*
* @param string $table_name
*
* @return array
*/
protected function getColumnsNames(string $table_name): array
{
$this->fetchTableColumns($table_name);
return array_column($this->columns[$table_name], 'Field');
}
/**
* Return column type.
*
* @param string $table_name
* @param string $column_name
*
* @return null|string
*/
protected function getColumnType(string $table_name, string $column_name): ?string
{
$this->fetchTableColumns($table_name);
foreach ($this->columns[$table_name] as $column_specs) {
if ($column_specs['Field'] === $column_name) {
return $column_specs['Type'];
}
}
return null;
}
/**
* Return column type.
*
* @param string $table_name
*
* @return void
*/
private function fetchTableColumns(string $table_name): void
{
if (!array_key_exists($table_name, $this->columns)) {
if (($columns_res = $this->db->query('SHOW COLUMNS FROM ' . $this->db->quoteName($table_name))) === false) {
throw new \Exception(sprintf('Unable to get table "%s" columns', $table_name));
}
$this->columns[$table_name] = $columns_res->fetch_all(MYSQLI_ASSOC);
}
}
/**
* Return index for given table.
* Array keys are index key, and values are fields related to this key.
*
* @param string $table_name
*
* @return array
*/
protected function getIndex(string $table_name): array
{
if (!array_key_exists($table_name, $this->indexes)) {
if (($keys_res = $this->db->query('SHOW INDEX FROM ' . $this->db->quoteName($table_name))) === false) {
throw new \Exception(sprintf('Unable to get table "%s" index', $table_name));
}
$index = [];
while ($key_specs = $keys_res->fetch_assoc()) {
if ($key_specs['Index_type'] === 'FULLTEXT') {
continue; // Ignore FULLTEXT keys
}
$key_name = $key_specs['Key_name'];
if (!array_key_exists($key_name, $index)) {
$index[$key_name] = [];
}
$index[$key_name][$key_specs['Seq_in_index'] - 1] = $key_specs['Column_name'];
}
$this->indexes[$table_name] = $index;
}
return $this->indexes[$table_name];
}
}
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