67 lines
2.0 KiB
PHP
67 lines
2.0 KiB
PHP
<?php
|
|
|
|
declare(strict_types=1);
|
|
|
|
namespace PhpMyAdmin\Query;
|
|
|
|
/**
|
|
* Handles caching results
|
|
*/
|
|
class Cache
|
|
{
|
|
/** @var (string|int|null)[][][] Table data cache */
|
|
private array $tableCache = [];
|
|
|
|
/**
|
|
* Caches table data so Table does not require to issue
|
|
* SHOW TABLE STATUS again
|
|
*
|
|
* @param (string|int|null)[][] $tables information for tables of some databases
|
|
*/
|
|
public function cacheTableData(string $database, array $tables): void
|
|
{
|
|
// Note: This function must not use array_merge because numerical indices must be preserved.
|
|
// When an entry already exists for the database in cache, we merge the incoming data with existing data.
|
|
// The union operator appends elements from right to left unless they exists on the left already.
|
|
// Doing the union with incoming data on the left ensures that when we reread table status from DB,
|
|
// we overwrite whatever was in cache with the new data.
|
|
|
|
if (isset($this->tableCache[$database])) {
|
|
$this->tableCache[$database] = $tables + $this->tableCache[$database];
|
|
} else {
|
|
$this->tableCache[$database] = $tables;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Set an item in the cache
|
|
*/
|
|
public function cacheTableValue(string $db, string $table, string $key, string|int|null $value): void
|
|
{
|
|
$this->tableCache[$db][$table][$key] = $value;
|
|
}
|
|
|
|
/**
|
|
* Get a cached value from table cache.
|
|
*
|
|
* @param T $key
|
|
*
|
|
* @return (T is null ? (string|int|null)[] : (string|int|null))|null
|
|
*
|
|
* @template T of string|null
|
|
*/
|
|
public function getCachedTableContent(string $db, string $table, string|null $key = null): array|string|int|null
|
|
{
|
|
if ($key === null) {
|
|
return $this->tableCache[$db][$table] ?? null;
|
|
}
|
|
|
|
return $this->tableCache[$db][$table][$key] ?? null;
|
|
}
|
|
|
|
public function clearTableCache(): void
|
|
{
|
|
$this->tableCache = [];
|
|
}
|
|
}
|
