105 lines
3.0 KiB
PHP
105 lines
3.0 KiB
PHP
<?php
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namespace BeyondCode\LaravelWebSockets\LaravelEcho\Pusher\Channels;
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use BeyondCode\LaravelWebSockets\Events\ChannelVacated;
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use BeyondCode\LaravelWebSockets\LaravelEcho\Pusher\Dashboard;
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use BeyondCode\LaravelWebSockets\LaravelEcho\Pusher\Exceptions\InvalidSignatureException;
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use Illuminate\Support\Collection;
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use Ratchet\ConnectionInterface;
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use stdClass;
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class Channel
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{
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/** @var string */
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protected $channelId;
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/** @var \Ratchet\ConnectionInterface[] */
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protected $subscriptions = [];
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public function __construct(string $channelId)
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{
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$this->channelId = $channelId;
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}
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public function hasConnections(): bool
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{
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return count($this->subscriptions) > 0;
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}
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protected function verifySignature(ConnectionInterface $connection, stdClass $payload)
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{
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$auth = $payload->auth;
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$signature = "{$connection->socketId}:{$this->channelId}";
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if (isset($payload->channel_data)) {
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$signature .= ":{$payload->channel_data}";
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}
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if (str_after($auth, ':') !== hash_hmac('sha256', $signature, $connection->client->appSecret)) {
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throw new InvalidSignatureException();
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}
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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->saveConnection($connection);
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$connection->send(json_encode([
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'event' => 'pusher_internal:subscription_succeeded',
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'channel' => $this->channelId
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]));
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}
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public function unsubscribe(ConnectionInterface $connection)
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{
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unset($this->subscriptions[$connection->socketId]);
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if (! $this->hasConnections()) {
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event(new ChannelVacated($connection, $this->channelId));
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Dashboard::vacated($connection, $this->channelId);
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}
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}
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protected function saveConnection(ConnectionInterface $connection)
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{
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if (! $this->hasConnections()) {
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Dashboard::occupied($connection, $this->channelId);
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}
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$this->subscriptions[$connection->socketId] = $connection;
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Dashboard::subscribed($connection, $this->channelId);
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}
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public function broadcast($payload)
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{
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foreach ($this->subscriptions as $connection) {
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$connection->send(json_encode($payload));
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}
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}
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public function broadcastToEveryoneExcept($payload, ?string $socketId = null)
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{
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Collection::make($this->subscriptions)->reject(function ($existingConnection) use ($socketId) {
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return $existingConnection->socketId === $socketId;
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})->each->send(json_encode($payload));
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}
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public function broadcastToOthers(ConnectionInterface $connection, $payload)
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{
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$this->broadcastToEveryoneExcept($payload, $connection->socketId);
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}
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public function toArray(): array
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{
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return [
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'occupied' => count($this->subscriptions) > 0,
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'subscription_count' => count($this->subscriptions)
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];
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}
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} |