mirror of https://github.com/friendica/friendica
99 lines
2.9 KiB
PHP
99 lines
2.9 KiB
PHP
<?php
|
|
/**
|
|
* @copyright Copyright (C) 2010-2024, the Friendica project
|
|
*
|
|
* @license GNU AGPL version 3 or any later version
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public License
|
|
* along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
namespace Friendica\Util\Writer;
|
|
|
|
use Friendica\Database\Definition\ViewDefinition;
|
|
|
|
/**
|
|
* SQL writer utility for the db view definition
|
|
*/
|
|
class ViewDefinitionSqlWriter
|
|
{
|
|
/**
|
|
* Creates a complete SQL definition bases on a give View Definition class
|
|
*
|
|
* @param ViewDefinition $definition The View definition class
|
|
*
|
|
* @return string The SQL definition as a string
|
|
*/
|
|
public static function create(ViewDefinition $definition): string
|
|
{
|
|
$sqlString = '';
|
|
|
|
foreach ($definition->getAll() as $viewName => $viewStructure) {
|
|
$sqlString .= "--\n";
|
|
$sqlString .= "-- VIEW $viewName\n";
|
|
$sqlString .= "--\n";
|
|
$sqlString .= static::dropView($viewName);
|
|
$sqlString .= static::createView($viewName, $viewStructure);
|
|
}
|
|
|
|
return $sqlString;
|
|
}
|
|
|
|
/**
|
|
* Creates the SQL definition to drop a view
|
|
*
|
|
* @param string $viewName the view name
|
|
*
|
|
* @return string The SQL definition
|
|
*/
|
|
public static function dropView(string $viewName): string
|
|
{
|
|
return sprintf("DROP VIEW IF EXISTS `%s`", static::escape($viewName)) . ";\n";
|
|
}
|
|
|
|
/**
|
|
* Creates the SQL definition to create a new view
|
|
*
|
|
* @param string $viewName The view name
|
|
* @param array $viewStructure The structure information of the view
|
|
*
|
|
* @return string The SQL definition
|
|
*/
|
|
public static function createView(string $viewName, array $viewStructure): string
|
|
{
|
|
$sql_rows = [];
|
|
foreach ($viewStructure['fields'] as $fieldname => $origin) {
|
|
if (is_string($origin)) {
|
|
$sql_rows[] = $origin . " AS `" . static::escape($fieldname) . "`";
|
|
} elseif (is_array($origin) && (sizeof($origin) == 2)) {
|
|
$sql_rows[] = "`" . static::escape($origin[0]) . "`.`" . static::escape($origin[1]) . "` AS `" . static::escape($fieldname) . "`";
|
|
}
|
|
}
|
|
return sprintf("CREATE VIEW `%s` AS SELECT \n\t", static::escape($viewName)) .
|
|
implode(",\n\t", $sql_rows) . "\n\t" . $viewStructure['query'] . ";\n\n";
|
|
}
|
|
|
|
/**
|
|
* Standard escaping for SQL definitions
|
|
*
|
|
* @param string $sqlString the SQL string to escape
|
|
*
|
|
* @return string escaped SQL string
|
|
*/
|
|
public static function escape(string $sqlString): string
|
|
{
|
|
return str_replace("'", "\\'", $sqlString);
|
|
}
|
|
}
|