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<?php |
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|
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namespace FluentBoards\Framework\Foundation; |
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|
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use Exception; |
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use FluentBoards\Framework\Support\Arr; |
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use FluentBoards\Framework\Support\Helper; |
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use InvalidArgumentException; |
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|
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class Async |
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{ |
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/** |
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* The dispatched handlers to stop recursion. |
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* |
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* @var array |
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*/ |
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protected $dispatched = []; |
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|
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/** |
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* The application instance |
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* |
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* @var \FluentBoards\Framework\Foundation\Application |
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*/ |
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private static $app = null; |
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|
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/** |
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* Self instance |
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* |
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* @var self |
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*/ |
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private static $instance = null; |
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|
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/** |
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* The array of async action handlers |
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* |
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* @var array |
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*/ |
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private static $handlers = []; |
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|
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/** |
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* The array of async action handlers in queue |
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* |
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* @var array |
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*/ |
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private static $queue = [ |
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'default' => [] |
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]; |
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|
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/** |
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* Creates the instance |
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* |
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* @return self |
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*/ |
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public static function init($app = null) |
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{ |
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$app = $app ?: App::make(); |
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|
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if (is_null(static::$instance)) { |
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static::$app = $app; |
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static::$instance = new static; |
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} |
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|
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$action = static::$instance->makeAsyncHookAction(); |
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|
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static::$app->addAction( |
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"admin_post_{$action}", [static::$instance, 'handle'] |
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); |
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|
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static::$app->addAction( |
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"admin_post_nopriv_{$action}", [static::$instance, 'handle'] |
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); |
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|
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return static::$instance; |
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} |
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|
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/** |
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* Makes the async hook action name |
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* |
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* @return string |
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*/ |
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public function makeAsyncHookAction() |
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{ |
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$slug = static::$app->config->get('app.slug'); |
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|
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return "wpfluent_async_hook_{$slug}"; |
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} |
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|
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/** |
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* Handles the incoming async request |
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* |
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* @return void |
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*/ |
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public function handle() |
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{ |
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$post = static::$app->request->post(); |
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|
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$this->verifyRequest(static::$app, $post); |
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|
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$handlers = Arr::get($post, 'handlers', []); |
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|
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foreach ($handlers as $handler) { |
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try { |
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[$class, $action] = $this->resolveHandler($handler); |
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|
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$this->execute(static::$app, $class, $action['params'] ?? []); |
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|
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} catch (Exception $e) { |
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error_log($e->getMessage()); |
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} |
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} |
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} |
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|
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/** |
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* Verify the request by checking the nonce. |
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* |
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* @param FluentBoards\Framework\Foundation\Application $app |
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* @param array $data |
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* @return void |
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*/ |
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protected function verifyRequest($app, $data) |
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{ |
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if (!isset($data['wpfluent_async_nonce'])) { |
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exit; |
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} |
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|
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!wp_verify_nonce( |
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$data['wpfluent_async_nonce'], |
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$app->config->get('app.slug') |
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) && exit; |
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} |
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|
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/** |
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* Resolve the action handler. |
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* |
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* @param JSON $handler |
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* @return array |
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*/ |
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protected function resolveHandler($action) |
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{ |
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if (json_last_error() !== JSON_ERROR_NONE) { |
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throw new InvalidArgumentException("Invalid action."); |
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} |
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|
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$handler = base64_decode($action['handler']); |
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|
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[$class, $method] = explode('@', $handler); |
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|
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if (!class_exists($class)) { |
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throw new InvalidArgumentException( |
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"Handler {$class} does not exist." |
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); |
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} |
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|
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return [$class.'@'.$method, $action]; |
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} |
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|
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/** |
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* Execute the action handler. |
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* |
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* @param \FluentBoards\Framework\Foundation\Application $app |
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* @param string $class |
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* @param array $params |
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* @return void |
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*/ |
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protected function execute($app, $class, $params = []) |
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{ |
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set_time_limit(0); |
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ignore_user_abort(true); |
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[$class, $method] = explode('@', $class); |
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$app->make($class)->{$method}($app, $params); |
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} |
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|
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/** |
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* Add the async handler and register the shutdown handler |
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* All the handlers will be dispatched in a separate request |
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* |
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* @param string (Class@handler or with __invoke method) $handler |
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* @return self |
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* @throws \InvalidArgumentException |
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*/ |
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public static function call($handler, array $params = []) |
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{ |
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if (!static::$instance) { |
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static::init(); |
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} |
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|
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static::$handlers[] = static::$instance->validate( |
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$handler, $params, static::sign(debug_backtrace(false, 1)[0]) |
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); |
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|
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return static::$instance->maybeRegisterShutDownHandler(); |
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} |
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|
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/** |
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* Queue the async handler and register the shutdown handler |
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* Queued handlers will be dispatched in a single request |
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* |
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* @param string (Class@handler or with __invoke method) $handler |
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* @return self |
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* @throws \InvalidArgumentException |
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*/ |
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public static function queue( |
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$handler, $params = [], $name = 'default' |
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) { |
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if (!static::$instance) { |
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static::init(); |
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} |
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|
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if (is_string($params)) { |
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$name = $params; |
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$params = []; |
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} |
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|
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static::$queue[$name][] = static::$instance->validate( |
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$handler, $params, static::sign(debug_backtrace(false, 1)[0]) |
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); |
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|
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return static::$instance->maybeRegisterShutDownHandler(); |
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} |
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|
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/** |
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* Sign the handler to mark as dispatched. |
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* |
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* @param array $handler |
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* @return string |
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*/ |
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protected static function sign($handler) |
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{ |
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return md5($handler['file'] . $handler['line']); |
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} |
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|
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/** |
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* Validate the handler and add a sign to mark as dispatched. |
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* |
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* @param string (Class@handler or with __invoke method) $handler |
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* @return string |
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* @throws \InvalidArgumentException |
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*/ |
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public function validate($handler, $params, $sign) |
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{ |
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$method = '__invoke'; |
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|
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if (is_array($handler)) { |
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if (is_object($handler[0])) { |
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$handler[0] = get_class($handler[0]); |
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} |
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$handler = $handler[0] . '@' . $handler[1]; |
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} |
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|
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if (str_contains($handler, '@')) { |
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[$handler, $method] = explode('@', $handler); |
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} |
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|
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if (!class_exists($handler)) { |
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throw new InvalidArgumentException( |
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"Class {$handler} not found." |
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); |
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} |
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|
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if (!method_exists($handler, $method)) { |
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throw new InvalidArgumentException( |
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"Class {$handler} must implement __invoke or specify method." |
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); |
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} |
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|
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$handler = $handler.'@'.$method; |
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|
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return [ |
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'sign' => $sign, |
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'params' => $params, |
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'handler' => base64_encode($handler), |
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]; |
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} |
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|
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/** |
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* Register the shutdown handler |
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* |
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* @return void |
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*/ |
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protected function maybeRegisterShutDownHandler() |
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{ |
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$handler = [static::$instance, 'dispatch']; |
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|
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if (!static::$app->hasAction('shutdown', $handler)) { |
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static::$app->addAction('shutdown', $handler); |
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} |
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|
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return static::$instance; |
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} |
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|
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/** |
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* Dispatches the async request |
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* |
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* @return void |
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*/ |
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public function dispatch() |
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{ |
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$stacks = array_filter([ |
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array_filter(static::$queue), |
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array_filter(static::$handlers), |
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]); |
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|
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// At first we need to mark all the handlers from all |
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// the stacks as dispatched before sending any request. |
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foreach ($stacks as $key => $stack) { |
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$stacks[$key] = $this->getDispatchables($stack); |
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} |
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|
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// Now we can dispatch them all |
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foreach ($stacks as $stack) { |
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foreach ($stack as $handler) { |
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$this->sendAsyncRequest($this->wrap($handler)); |
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} |
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} |
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} |
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|
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/** |
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* Filter the handlers to be dispatched. |
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* |
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* @param array $stack |
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* @return array|null |
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*/ |
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protected function getDispatchables($stack) |
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{ |
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// If the stack is an array of associtive arrays we |
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// need to get the first one because queued handlers |
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// will containn one associtive array in the stack. |
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$stack = !isset($stack[0]) ? reset($stack) : $stack; |
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|
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return array_filter($stack, function ($handler) { |
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if (isset($handler['sign'])) { |
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$isDispatched = in_array( |
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$handler['sign'], |
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static::$app->request->post('dispatched', []) |
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); |
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|
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if (!$isDispatched) { |
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$this->dispatched[] = $handler['sign']; |
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return !$isDispatched; |
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} |
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} |
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}); |
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} |
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|
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/** |
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* Wrap with an array if necessary. Only used for separate |
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* handlers because queued handlers will be an array of |
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* associative arrays and we treat all the stacks same. |
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* |
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* @param array $handlers |
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* @return array of array(s) |
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*/ |
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protected function wrap($handlers) |
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{ |
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return isset($handlers[0]) ? $handlers : [$handlers]; |
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} |
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|
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/** |
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* Send the real async request |
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* |
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* @param array $handler |
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* @return mixed |
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*/ |
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public function sendAsyncRequest(array $handler) |
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{ |
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Helper::retry(3, function () use ($handler) { |
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return $this->sendRequest( |
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$this->url(), |
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$this->data($handler), |
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['cookie' => $this->getCookie()] |
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); |
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}, 2000, function ($e) { |
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return str_contains($e->getMessage(), 'cURL'); |
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}); |
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} |
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|
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/** |
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* Prepare the request body/POST data. |
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* |
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* @param string|array $handler |
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* @return array |
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*/ |
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protected function data($handler) |
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{ |
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$post = static::$app->request->post(); |
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|
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$data = [ |
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'handlers' => $handler, |
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'wpfluent_async_nonce' => wp_create_nonce( |
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static::$app->config->get('app.slug') |
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), |
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'dispatched' => array_unique(array_merge( |
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Arr::get($post, 'dispatched', []), |
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$this->dispatched, |
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)), |
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]; |
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|
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return array_merge($data, Arr::except($post, [ |
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'handlers', 'wpfluent_async_nonce', 'dispatched' |
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])); |
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} |
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|
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/** |
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* Build the request url. |
| 405 |
* |
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* @return string |
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*/ |
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protected function url() |
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{ |
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return admin_url('admin-post.php') . '?' . http_build_query( |
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array_merge( |
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static::$app->request->query(), |
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['action' => $this->makeAsyncHookAction()] |
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) |
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); |
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} |
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|
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/** |
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* Send the non-blocking request. |
| 420 |
* |
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* @param string $url |
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* @param array $body |
| 423 |
* @param array $headers |
| 424 |
* @return mixed |
| 425 |
*/ |
| 426 |
protected function sendRequest($url, $body = [], $headers = []) |
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{ |
| 428 |
return wp_remote_post($url, [ |
| 429 |
'timeout' => 0.01, |
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'blocking' => false, |
| 431 |
'sslverify' => false, |
| 432 |
'body' => $body, |
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'headers' => $headers, |
| 434 |
]); |
| 435 |
} |
| 436 |
|
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/** |
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* Get the cookie to send with the request |
| 439 |
* @return string Cookie string |
| 440 |
*/ |
| 441 |
protected function getCookie() |
| 442 |
{ |
| 443 |
$cookies = []; |
| 444 |
|
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foreach ($_COOKIE as $name => $value) { |
| 446 |
$cookies[] = "$name=" . urlencode( |
| 447 |
is_array($value) ? serialize($value) : $value |
| 448 |
); |
| 449 |
} |
| 450 |
|
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return implode('; ', $cookies); |
| 452 |
} |
| 453 |
} |
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|
