Current File : //www/varak.net/losik.varak.net/vendor/nette/caching/src/Caching/Storages/SQLiteJournal.php
<?php
/**
* This file is part of the Nette Framework (https://nette.org)
* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
*/
declare(strict_types=1);
namespace Nette\Caching\Storages;
use Nette;
use Nette\Caching\Cache;
/**
* SQLite based journal.
*/
class SQLiteJournal implements Journal
{
use Nette\SmartObject;
/** @string */
private $path;
/** @var \PDO */
private $pdo;
public function __construct(string $path)
{
if (!extension_loaded('pdo_sqlite')) {
throw new Nette\NotSupportedException('SQLiteJournal requires PHP extension pdo_sqlite which is not loaded.');
}
$this->path = $path;
}
private function open(): void
{
if ($this->path !== ':memory:' && !is_file($this->path)) {
touch($this->path); // ensures ordinary file permissions
}
$this->pdo = new \PDO('sqlite:' . $this->path);
$this->pdo->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);
$this->pdo->exec('
PRAGMA foreign_keys = OFF;
PRAGMA journal_mode = WAL;
CREATE TABLE IF NOT EXISTS tags (
key BLOB NOT NULL,
tag BLOB NOT NULL
);
CREATE TABLE IF NOT EXISTS priorities (
key BLOB NOT NULL,
priority INT NOT NULL
);
CREATE INDEX IF NOT EXISTS idx_tags_tag ON tags(tag);
CREATE UNIQUE INDEX IF NOT EXISTS idx_tags_key_tag ON tags(key, tag);
CREATE UNIQUE INDEX IF NOT EXISTS idx_priorities_key ON priorities(key);
CREATE INDEX IF NOT EXISTS idx_priorities_priority ON priorities(priority);
PRAGMA synchronous = NORMAL;
');
}
public function write(string $key, array $dependencies): void
{
if (!$this->pdo) {
$this->open();
}
$this->pdo->exec('BEGIN');
if (!empty($dependencies[Cache::Tags])) {
$this->pdo->prepare('DELETE FROM tags WHERE key = ?')->execute([$key]);
foreach ($dependencies[Cache::Tags] as $tag) {
$arr[] = $key;
$arr[] = $tag;
}
$this->pdo->prepare('INSERT INTO tags (key, tag) SELECT ?, ?' . str_repeat('UNION SELECT ?, ?', count($arr) / 2 - 1))
->execute($arr);
}
if (!empty($dependencies[Cache::Priority])) {
$this->pdo->prepare('REPLACE INTO priorities (key, priority) VALUES (?, ?)')
->execute([$key, (int) $dependencies[Cache::Priority]]);
}
$this->pdo->exec('COMMIT');
}
public function clean(array $conditions): ?array
{
if (!$this->pdo) {
$this->open();
}
if (!empty($conditions[Cache::All])) {
$this->pdo->exec('
BEGIN;
DELETE FROM tags;
DELETE FROM priorities;
COMMIT;
');
return null;
}
$unions = $args = [];
if (!empty($conditions[Cache::Tags])) {
$tags = (array) $conditions[Cache::Tags];
$unions[] = 'SELECT DISTINCT key FROM tags WHERE tag IN (?' . str_repeat(', ?', count($tags) - 1) . ')';
$args = $tags;
}
if (!empty($conditions[Cache::Priority])) {
$unions[] = 'SELECT DISTINCT key FROM priorities WHERE priority <= ?';
$args[] = (int) $conditions[Cache::Priority];
}
if (empty($unions)) {
return [];
}
$unionSql = implode(' UNION ', $unions);
$this->pdo->exec('BEGIN IMMEDIATE');
$stmt = $this->pdo->prepare($unionSql);
$stmt->execute($args);
$keys = $stmt->fetchAll(\PDO::FETCH_COLUMN, 0);
if (empty($keys)) {
$this->pdo->exec('COMMIT');
return [];
}
$this->pdo->prepare("DELETE FROM tags WHERE key IN ($unionSql)")->execute($args);
$this->pdo->prepare("DELETE FROM priorities WHERE key IN ($unionSql)")->execute($args);
$this->pdo->exec('COMMIT');
return $keys;
}
}
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