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<?php |
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namespace BeyondCode\LaravelWebSockets\WebSockets\Channels; |
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use stdClass; |
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use Ratchet\ConnectionInterface; |
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class PresenceChannel extends Channel |
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{ |
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protected $users = []; |
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public function getUsers(): array |
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{ |
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return $this->users; |
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} |
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/* |
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* @link https://pusher.com/docs/pusher_protocol#presence-channel-events |
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*/ |
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public function subscribe(ConnectionInterface $connection, stdClass $payload) |
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{ |
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$this->verifySignature($connection, $payload); |
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$this->saveConnection($connection); |
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$channelData = json_decode($payload->channel_data); |
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$this->users[$connection->socketId] = $channelData; |
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// Send the success event |
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$connection->send(json_encode([ |
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'event' => 'pusher_internal:subscription_succeeded', |
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'channel' => $this->channelName, |
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'data' => json_encode($this->getChannelData()), |
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])); |
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$this->broadcastToOthers($connection, [ |
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'event' => 'pusher_internal:member_added', |
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'channel' => $this->channelName, |
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'data' => json_encode($channelData), |
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]); |
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} |
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public function unsubscribe(ConnectionInterface $connection) |
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{ |
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parent::unsubscribe($connection); |
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if (! isset($this->users[$connection->socketId])) { |
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return; |
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} |
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$this->broadcastToOthers($connection, [ |
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'event' => 'pusher_internal:member_removed', |
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'channel' => $this->channelName, |
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'data' => json_encode([ |
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'user_id' => $this->users[$connection->socketId]->user_id, |
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]), |
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]); |
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unset($this->users[$connection->socketId]); |
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} |
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protected function getChannelData(): array |
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{ |
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return [ |
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'presence' => [ |
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'ids' => $this->getUserIds(), |
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'hash' => $this->getHash(), |
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'count' => count($this->users), |
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], |
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]; |
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} |
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public function toArray(): array |
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{ |
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return array_merge(parent::toArray(), [ |
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'user_count' => count($this->users), |
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]); |
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} |
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protected function getUserIds(): array |
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{ |
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$userIds = array_map(function ($channelData) { |
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return (string) $channelData->user_id; |
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}, $this->users); |
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return array_values($userIds); |
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} |
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protected function getHash(): array |
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{ |
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$hash = []; |
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foreach ($this->users as $socketId => $channelData) { |
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$hash[$channelData->user_id] = $channelData->user_info; |
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} |
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return $hash; |
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} |
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} |
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If you access a property on an interface, you most likely code against a concrete implementation of the interface.
Available Fixes
Adding an additional type check:
Changing the type hint: