Socket.io Yii extension

Use all power of socket.io in your Yii 2 project.

Config

Install node + additional npm

    cd ~
    curl -sL https://deb.nodesource.com/setup_6.x -o nodesource_setup.sh
    sudo bash nodesource_setup.sh
    cd vendor/yiicod/yii2-socketio/server
    npm install

Console config (simple fork)

    'controllerMap' => [
        'socketio' => [
            'class' => \yiicod\socketio\commands\SocketIoCommand::class,
            'server' => 'localhost:1367'
        ],
    ]       

Start sockeio server

    php yii socketio/start

Stop sockeio server

    php yii socketio/stop

Console config + PM2(http://pm2.keymetrics.io/). This variant more preferable for console configuration

    'controllerMap' => [
        'socketio' => [
            'class' => \yiicod\socketio\commands\WorkerCommand::class,
            'server' => 'localhost:1367'
        ],
    ]

pm2 config:

    {
      "apps": [
        {
          "name": "socket-io-node-js-server",
          "script": "yii",
          "args": [
            "socketio/node-js-server"
          ],
          "exec_interpreter": "php",
          "exec_mode": "fork_mode",
          "max_memory_restart": "1G",
          "watch": false,
          "merge_logs": true,
          "out_file": "runtime/logs/node_js_server_out.log",
          "error_file": "runtime/logs/node_js_server_err.log"
        },
        {
          "name": "socket-io-php-server",
          "script": "yii",
          "args": [
            "socketio/php-server"
          ],
          "exec_interpreter": "php",
          "exec_mode": "fork_mode",
          "max_memory_restart": "1G",
          "watch": false,
          "merge_logs": true,
          "out_file": "runtime/logs/php_server_out.log",
          "error_file": "runtime/logs/php_server_err.log"
        },
      ]
    }

Run PM2 daemons

pm2 start daemons-app.json

PM2 will be run these two commands in background::

    php yii socketio/node-js-server
    php yii socketio/php-server

Common config

    'components' =>[
        'broadcastEvents' => [
            'class' => \yiicod\socketio\EventManager::class,
            'nsp' => 'some_unique_key',
            // Namespaces with events folders
            'namespaces' => [
                'app\socketio',
            ]
        ],
        'broadcastDriver' => [
            'class' => \yiicod\socketio\drivers\RedisDriver::class,
            'hostname' => 'localhost',
            'port' => 6379,
        ],    
    ]

Create publisher from server to client

    use yiicod\socketio\events\EventInterface;
    use yiicod\socketio\events\EventPubInterface;
    
    class CountEvent implements EventInterface, EventPubInterface
    {
        /**
         * Channel name. For client side this is nsp.
         */
        public static function broadcastOn(): array
        {
            return ['notifications'];
        }
    
        /**
         * Event name
         */
        public static function name(): string
        {
            return 'update_notification_count';
        }
            
        /**
         * Emit client event
         * @param array $data
         * @return array
         */
        public function fire(array $data): array
        {
            return $data;
        }
    }

    var socket = io('localhost:1367/notifications');
    socket.on('update_notification_count', function(data){
        console.log(data)
    });

    //Run broadcast to client
    \yiicod\socketio\Broadcast::emit(CountEvent::name(), ['count' => 10])

Create receiver from client to server

    use yiicod\socketio\events\EventInterface;
    use yiicod\socketio\events\EventSubInterface;
    
    class MarkAsReadEvent implements EventInterface, EventSubInterface
    {
        /**
         * Channel name. For client side this is nsp.
         */
        public static function broadcastOn(): array
        {
            return ['notifications'];
        }
    
        /**
         * Event name
         */
        public static function name(): string
        {
            return 'mark_as_read_notification';
        }
            
        /**
         * Emit client event
         * @param array $data
         * @return array
         */
        public function handle(array $data)
        {
            // Mark notification as read
            // And call client update
            // Broadcast::emit('update_notification_count', ['some_key' => 'some_value']);
            
            // Push some log
            file_put_contents(\Yii::getAlias('@app/../file.txt'), serialize($data));
        }
    }

    var socket = io('localhost:1367/notifications');
    socket.emit('mark_as_read_notification', {id: 10});

You can have publisher and receiver in one event. If you need check data from client to server you should use:

• EventPolicyInterface

Receiver with checking from client to server

    use yiicod\socketio\events\EventSubInterface;
    use yiicod\socketio\events\EventInterface;
    use yiicod\socketio\events\EventPolicyInterface;
    
    class MarkAsReadEvent implements EventInterface, EventSubInterface, EventPolicyInterface
    {
        /**
         * Channel name. For client side this is nsp.
         */
        public static function broadcastOn(): array
        {
            return ['notifications'];
        }
    
        /**
         * Event name
         */
        public static function name(): string
        {
            return 'mark_as_read_notification';
        }
         
        public function can($data): bool
        {
            // Check data from client    
            return true;
        }        
        
        /**
         * Emit client event
         * @param array $data
         * @return array
         */
        public function handle(array $data)
        {
            // Mark notification as read
            // And call client update
            Broadcast::emit('update_notification_count', ['some_key' => 'some_value']);
        }
    }

Soket.io has room functionl. If you need it, you should implement:

• EventRoomInterface

    use yiicod\socketio\events\EventPubInterface;
    use yiicod\socketio\events\EventInterface;
    use yiicod\socketio\events\EventRoomInterface;
    
    class CountEvent implements EventInterface, EventPubInterface, EventRoomInterface
    {
        /**
         * User id
         * @var int
         */
        protected $userId;
        
        /**
         * Channel name. For client side this is nsp.
         */
        public static function broadcastOn(): array
        {
            return ['notifications'];
        }
    
        /**
         * Event name
         */
        public static function name(): string
        {
            return 'update_notification_count';
        }
           
        /**
         * Socket.io room
         * @return string
         */
        public function room(): string
        {
            return 'user_id_' . $this->userId;
        }            
            
        /**
         * Emit client event
         * @param array $data
         * @return array
         */
        public function fire(array $data): array
        {
            $this->userId = $data['userId'];
            return [
                'count' => 10,
            ];
        }
    }

    var socket = io('localhost:1367/notifications');
    socket.emit('join', {room: 'user_id_'<?= 10 ?>});
    // Now you will receive data from 'room-1'
    socket.on('update_notification_count', function(data){
        console.log(data)
    });
    // You can leave room
    socket.emit('leave');

    //Run broadcast to user id = 10 
    \yiicod\socketio\Broadcast::emit(CountEvent::name(), ['count' => 10, 'userId' => 10])