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<?php |
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/** |
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* @link https://github.com/Izumi-kun/yii2-longpoll |
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* @copyright Copyright (c) 2017 Viktor Khokhryakov |
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* @license http://opensource.org/licenses/BSD-3-Clause |
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*/ |
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namespace izumi\longpoll\widgets; |
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use izumi\longpoll\EventCollection; |
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use izumi\longpoll\EventCollectionInterface; |
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use Yii; |
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use yii\base\InvalidArgumentException; |
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use yii\base\InvalidConfigException; |
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use yii\base\Widget; |
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use yii\helpers\Json; |
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use yii\helpers\Url; |
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use yii\web\JsExpression; |
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use yii\web\View; |
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/** |
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* Usage: |
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* |
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* ```php |
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* LongPoll::widget([ |
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* 'url' => ['site/polling'], |
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* 'events' => ['eventId'], |
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* 'callback' => 'console.log', |
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* ]); |
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* ``` |
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* |
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* @author Viktor Khokhryakov <[email protected]> |
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*/ |
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class LongPoll extends Widget |
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{ |
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public $url; |
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/** |
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* @var EventCollectionInterface |
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*/ |
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public $eventCollection; |
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/** |
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* @var string event collection class name. |
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*/ |
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public $eventCollectionClass = EventCollection::class; |
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/** |
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* @var array additional options to be passed to JS registerer. |
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*/ |
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public $clientOptions; |
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/** |
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* @var array params will be passed to JS XHR |
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*/ |
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public $requestParams = []; |
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/** |
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* @var string |
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*/ |
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public $callback; |
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/** |
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* @inheritdoc |
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* @throws InvalidConfigException |
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*/ |
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public function init() |
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{ |
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if (!$this->eventCollection instanceof EventCollectionInterface) { |
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$this->eventCollection = Yii::createObject([ |
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'class' => $this->eventCollectionClass, |
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]); |
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} |
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} |
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/** |
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* @inheritdoc |
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* @throws InvalidConfigException |
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*/ |
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public function run() |
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{ |
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$id = $this->getId(); |
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$options = Json::htmlEncode($this->createJsOptions()); |
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$view = $this->getView(); |
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LongPollAsset::register($view); |
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$view->registerJs("jQuery.longpoll.register('$id', $options);", View::POS_END); |
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$view->registerJs("jQuery.longpoll.get('$id').start();", View::POS_READY); |
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} |
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/** |
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* @param EventCollectionInterface $eventCollection |
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* @param array $params |
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* @return array |
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* @throws InvalidConfigException |
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*/ |
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public static function createPollParams(EventCollectionInterface $eventCollection, $params = []) |
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{ |
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$events = []; |
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foreach ($eventCollection->getEvents() as $event) { |
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$events[$event->getParamName()] = $event->getState(); |
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} |
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if (empty($events)) { |
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throw new InvalidConfigException('At least one event should be added.'); |
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} |
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if (array_intersect_key($events, $params)) { |
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throw new InvalidArgumentException('The "params" property contains keys that intersect with events.'); |
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} |
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return $params + $events; |
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} |
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/** |
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* @return array |
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* @throws InvalidConfigException |
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*/ |
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public function createJsOptions() |
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{ |
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if (!isset($this->url)) { |
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throw new InvalidConfigException('The "url" property must be set.'); |
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} |
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$options = $this->clientOptions; |
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$options['url'] = Url::to($this->url); |
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$options['params'] = self::createPollParams($this->eventCollection, $this->requestParams); |
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if ($this->callback) { |
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$options['callback'] = new JsExpression($this->callback); |
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} |
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return $options; |
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} |
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/** |
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* @param array $events |
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* @throws InvalidConfigException |
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*/ |
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public function setEvents($events) |
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{ |
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$this->eventCollection = Yii::createObject([ |
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'class' => $this->eventCollectionClass, |
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'events' => $events, |
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]); |
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} |
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} |
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Izumi-kun /
yii2-longpoll
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