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<?php |
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declare(strict_types=1); |
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namespace PhpMyAdmin\MoTranslator\Cache; |
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use PhpMyAdmin\MoTranslator\CacheException; |
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use PhpMyAdmin\MoTranslator\MoParser; |
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use function apcu_enabled; |
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use function apcu_entry; |
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use function apcu_exists; |
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use function apcu_fetch; |
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use function apcu_store; |
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use function array_combine; |
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use function array_keys; |
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use function array_map; |
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use function assert; |
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use function function_exists; |
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use function is_array; |
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use function is_string; |
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final class ApcuCache implements CacheInterface |
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{ |
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public const LOADED_KEY = '__TRANSLATIONS_LOADED__'; |
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/** @var MoParser */ |
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private $parser; |
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/** @var string */ |
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private $locale; |
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/** @var string */ |
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private $domain; |
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/** @var int */ |
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private $ttl; |
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/** @var bool */ |
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private $reloadOnMiss; |
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/** @var string */ |
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private $prefix; |
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public function __construct( |
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MoParser $parser, |
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string $locale, |
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string $domain, |
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int $ttl = 0, |
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bool $reloadOnMiss = true, |
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string $prefix = 'mo_' |
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) { |
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if (! (function_exists('apcu_enabled') && apcu_enabled())) { |
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throw new CacheException('ACPu extension must be installed and enabled'); |
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} |
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$this->parser = $parser; |
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$this->locale = $locale; |
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$this->domain = $domain; |
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$this->ttl = $ttl; |
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$this->reloadOnMiss = $reloadOnMiss; |
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$this->prefix = $prefix; |
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$this->ensureTranslationsLoaded(); |
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} |
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public function get(string $msgid): string |
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{ |
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$msgstr = apcu_fetch($this->getKey($msgid), $success); |
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if ($success && is_string($msgstr)) { |
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return $msgstr; |
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} |
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if (! $this->reloadOnMiss) { |
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return $msgid; |
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} |
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return $this->reloadOnMiss($msgid); |
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} |
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private function reloadOnMiss(string $msgid): string |
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{ |
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// store original if translation is not present |
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$cached = apcu_entry($this->getKey($msgid), static function () use ($msgid) { |
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return $msgid; |
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}, $this->ttl); |
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// if another process has updated cache, return early |
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if ($cached !== $msgid && is_string($cached)) { |
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return $cached; |
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} |
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// reload .mo file, in case entry has been evicted |
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$this->parser->parseIntoCache($this); |
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$msgstr = apcu_fetch($this->getKey($msgid), $success); |
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return $success && is_string($msgstr) ? $msgstr : $msgid; |
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} |
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public function set(string $msgid, string $msgstr): void |
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{ |
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apcu_store($this->getKey($msgid), $msgstr, $this->ttl); |
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} |
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public function has(string $msgid): bool |
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{ |
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return apcu_exists($this->getKey($msgid)); |
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} |
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public function setAll(array $translations): void |
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{ |
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$keys = array_map(function (string $msgid): string { |
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return $this->getKey($msgid); |
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}, array_keys($translations)); |
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$translations = array_combine($keys, $translations); |
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assert(is_array($translations)); |
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apcu_store($translations, null, $this->ttl); |
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} |
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private function getKey(string $msgid): string |
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{ |
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return $this->prefix . $this->locale . '.' . $this->domain . '.' . $msgid; |
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} |
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private function ensureTranslationsLoaded(): void |
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{ |
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// Try to prevent cache slam if multiple processes are trying to load translations. There is still a race |
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// between the exists check and creating the entry, but at least it's small |
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$key = $this->getKey(self::LOADED_KEY); |
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$loaded = apcu_exists($key) || apcu_entry($key, static function (): int { |
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return 0; |
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}, $this->ttl); |
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if ($loaded) { |
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return; |
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} |
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$this->parser->parseIntoCache($this); |
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apcu_store($this->getKey(self::LOADED_KEY), 1, $this->ttl); |
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} |
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} |
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phpmyadmin /
motranslator
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