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<?php |
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namespace BeyondCode\LaravelWebSockets\PubSub\Drivers; |
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use stdClass; |
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use React\EventLoop\LoopInterface; |
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use React\Promise\FulfilledPromise; |
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use React\Promise\PromiseInterface; |
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use BeyondCode\LaravelWebSockets\PubSub\ReplicationInterface; |
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class LocalClient implements ReplicationInterface |
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{ |
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/** |
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* Mapping of the presence JSON data for users in each channel |
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* |
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* @var string[][] |
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*/ |
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protected $channelData = []; |
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/** |
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* Boot the pub/sub provider (open connections, initial subscriptions, etc). |
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* |
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* @param LoopInterface $loop |
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* @return self |
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*/ |
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public function boot(LoopInterface $loop) : ReplicationInterface |
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{ |
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return $this; |
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} |
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/** |
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* Publish a payload on a specific channel, for a specific app. |
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* |
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* @param string $appId |
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* @param string $channel |
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* @param stdClass $payload |
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* @return bool |
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*/ |
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public function publish(string $appId, string $channel, stdClass $payload) : bool |
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{ |
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// Nothing to do, nobody to publish to |
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return true; |
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} |
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/** |
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* Subscribe to receive messages for a channel. |
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* |
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* @param string $appId |
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* @param string $channel |
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* @return bool |
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*/ |
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public function subscribe(string $appId, string $channel) : bool |
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{ |
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return true; |
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} |
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/** |
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* Unsubscribe from a channel. |
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* |
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* @param string $appId |
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* @param string $channel |
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* @return bool |
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*/ |
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public function unsubscribe(string $appId, string $channel) : bool |
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{ |
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return true; |
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} |
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/** |
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* Add a member to a channel. To be called when they have |
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* subscribed to the channel. |
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* |
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* @param string $appId |
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* @param string $channel |
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* @param string $socketId |
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* @param string $data |
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*/ |
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public function joinChannel(string $appId, string $channel, string $socketId, string $data) |
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{ |
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$this->channelData["$appId:$channel"][$socketId] = $data; |
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} |
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/** |
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* Remove a member from the channel. To be called when they have |
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* unsubscribed from the channel. |
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* |
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* @param string $appId |
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* @param string $channel |
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* @param string $socketId |
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*/ |
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public function leaveChannel(string $appId, string $channel, string $socketId) |
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{ |
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unset($this->channelData["$appId:$channel"][$socketId]); |
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if (empty($this->channelData["$appId:$channel"])) { |
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unset($this->channelData["$appId:$channel"]); |
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} |
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} |
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/** |
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* Retrieve the full information about the members in a presence channel. |
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* |
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* @param string $appId |
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* @param string $channel |
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* @return PromiseInterface |
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*/ |
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public function channelMembers(string $appId, string $channel) : PromiseInterface |
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{ |
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$members = $this->channelData["$appId:$channel"] ?? []; |
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// The data is expected as objects, so we need to JSON decode |
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$members = array_map(function ($user) { |
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return json_decode($user); |
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}, $members); |
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return new FulfilledPromise($members); |
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} |
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/** |
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* Get the amount of users subscribed for each presence channel. |
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* |
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* @param string $appId |
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* @param array $channelNames |
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* @return PromiseInterface |
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*/ |
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public function channelMemberCounts(string $appId, array $channelNames) : PromiseInterface |
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{ |
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$results = []; |
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// Count the number of users per channel |
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foreach ($channelNames as $channel) { |
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$results[$channel] = isset($this->channelData["$appId:$channel"]) |
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? count($this->channelData["$appId:$channel"]) |
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: 0; |
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} |
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return new FulfilledPromise($results); |
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} |
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} |
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beyondcode /
laravel-websockets
