Jan-Niclas LoosenandClaude Opus 5.5
048cd9353d
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
53 lines
1.4 KiB
PHP
53 lines
1.4 KiB
PHP
<?php
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declare(strict_types=1);
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namespace LIT\MCP\Integrations\Divi\Design;
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use InvalidArgumentException;
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defined('ABSPATH') || exit;
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/**
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* One confirmed change per design area at a time (final review I-5): an option lit_mcp_lock_<area> (never
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* autoloaded) holds the time the lock was taken. add_option() is atomic – it fails while the option exists. A lock
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* older than STALE_AFTER seconds (a request that died) is removed and taken once more.
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*/
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final class DesignLock
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{
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public const STALE_AFTER = 120;
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private const PREFIX = 'lit_mcp_lock_';
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/** @throws InvalidArgumentException For an area outside SnapshotStore::AREAS. */
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public static function option(string $area): string
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{
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if (! in_array($area, SnapshotStore::AREAS, true)) {
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throw new InvalidArgumentException(sprintf('Unknown design area "%s".', $area));
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}
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return self::PREFIX . $area;
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}
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public function acquire(string $area): bool
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{
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$option = self::option($area);
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if (add_option($option, time(), '', false)) {
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return true;
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}
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$since = get_option($option, 0);
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if (is_numeric($since) && time() - (int) $since <= self::STALE_AFTER) {
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return false;
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}
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delete_option($option);
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return add_option($option, time(), '', false);
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}
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public function release(string $area): void
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{
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delete_option(self::option($area));
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}
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}
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