Connection Management

class ActionCable::Connection::Base
  # Declare connection identifiers for finding connections later
  # @param identifiers [Array<Symbol>] List of identifier attribute names
  def self.identified_by(*identifiers)
  end
  
  # Called when WebSocket connection is established
  # Override to implement authentication logic
  def connect
  end
  
  # Called when WebSocket connection is closed
  # Override to implement cleanup logic  
  def disconnect
  end
  
  # Reject unauthorized connection attempts
  # Closes the WebSocket connection immediately
  def reject_unauthorized_connection
  end
  
  # Access to the HTTP request environment
  attr_reader :env
  
  # Access to the server instance
  attr_reader :server
  
  # Access to subscription manager
  attr_reader :subscriptions
  
  # Connection logger instance
  attr_reader :logger
  
  # WebSocket protocol being used
  attr_reader :protocol
end

module ApplicationCable
  class Connection < ActionCable::Connection::Base
    identified_by :current_user, :current_account
    
    def connect
      self.current_user = find_verified_user
      self.current_account = current_user.account
      logger.add_tags(current_user.email)
    end
    
    def disconnect
      # Cleanup logic when connection closes
      current_user&.update(last_seen_at: Time.current)
    end
    
    private
    
    def find_verified_user
      # Authenticate using cookies or query parameters
      verified_user = User.find_by(id: cookies.encrypted[:user_id])
      return verified_user if verified_user
      
      # Reject if authentication fails
      reject_unauthorized_connection
    end
  end
end

module ActionCable::Connection::Authorization
  # Reject unauthorized connection
  # Closes WebSocket with 'unauthorized' close code
  def reject_unauthorized_connection
  end
  
  private
  
  # Log rejection reason
  def log_unauthorized_connection(reason)
  end
end

module ActionCable::Connection::Identification
  # Declare identifiers for this connection class
  # Creates attr_accessor methods for each identifier
  # @param identifiers [Array<Symbol>] Identifier names
  def self.included(base)
    base.extend(ClassMethods)
  end
  
  module ClassMethods
    def identified_by(*identifiers)
    end
    
    # Returns list of declared identifiers
    def identifiers
    end
  end
  
  # Get connection identifier string for this connection
  def connection_identifier
  end
end

class ActionCable::Server::Base
  # Disconnect connections by identifiers
  # @param identifiers [Hash] Hash of identifier key-value pairs
  def disconnect(identifiers)
  end
  
  # Restart server and close all connections
  def restart
  end
  
  # Get remote connections manager
  # @return [ActionCable::RemoteConnections]
  def remote_connections
  end
  
  # Get all connection identifiers configured
  # @return [Array<Symbol>]
  def connection_identifiers
  end
end

# Disconnect specific user across all servers
ActionCable.server.disconnect(current_user: User.find(123))

# Restart server (closes all connections)
ActionCable.server.restart

# Get remote connections manager
remote_conns = ActionCable.server.remote_connections

# Check configured identifiers
identifiers = ActionCable.server.connection_identifiers
# => [:current_user, :current_account]

class ActionCable::RemoteConnections
  def initialize(server)
  end
  
  # Find connections by identifier values
  # @param identifier [Hash] Hash of identifier key-value pairs
  # @return [ActionCable::RemoteConnections::RemoteConnection]
  def where(identifier)
  end
  
  attr_reader :server
end

class ActionCable::RemoteConnections::RemoteConnection
  def initialize(server, ids)
  end
  
  # Disconnect the found connections
  # Uses internal channel to broadcast disconnect command
  def disconnect
  end
  
  # Get all identifiers for this connection type
  def identifiers
  end
  
  protected
  
  attr_reader :server
end

# Find and disconnect user across all servers
ActionCable.server.remote_connections
  .where(current_user: User.find(123))
  .disconnect

# Find and disconnect by multiple identifiers  
ActionCable.server.remote_connections
  .where(current_user: user, current_account: account)
  .disconnect

class ActionCable::Connection::Subscriptions
  def initialize(connection)
  end
  
  # Execute subscription command from client
  # @param data [Hash] Subscription command data
  def execute_command(data)
  end
  
  # Add subscription for identifier
  # @param data [Hash] Subscription data with channel and params
  def add(data)
  end
  
  # Remove subscription by identifier
  # @param identifier [String] Subscription identifier
  def remove(identifier)
  end
  
  # Remove all subscriptions
  def unsubscribe_from_all
  end
  
  # Find subscription by identifier
  def find(identifier)
  end
  
  attr_reader :connection
end

module ActionCable::Connection::InternalChannel
  # Get the internal channel name for this connection
  def internal_channel
  end
  
  private
  
  # Subscribe to the internal channel
  def subscribe_to_internal_channel
  end
  
  # Unsubscribe from the internal channel
  def unsubscribe_from_internal_channel
  end
  
  # Process internal channel message
  def process_internal_message(message)
  end
end

class ActionCable::RemoteConnections::RemoteConnection::InvalidIdentifiersError < StandardError
end

begin
  ActionCable.server.remote_connections
    .where(invalid_identifier: "value")
    .disconnect
rescue ActionCable::RemoteConnections::RemoteConnection::InvalidIdentifiersError
  Rails.logger.error "Invalid connection identifiers provided"
end

class ActionCable::Connection::Base
  # Check if connection is open
  def open?
  end
  
  # Get connection state
  def state
  end
  
  # Close connection with optional reason
  def close(reason: nil)
  end
end

class ActionCable::Connection::Base
  # Process incoming WebSocket message
  def receive(websocket_message)
  end
  
  # Send message to client
  def transmit(data)
  end
  
  protected
  
  # Process subscription command
  def process_subscription_command(command)
  end
end