Class: LiteCable::Connection::Subscriptions

Inherits:
Object
  • Object
show all
Includes:
Logging
Defined in:
lib/lite_cable/connection/subscriptions.rb

Overview

Manage the connection channels and route messages

Defined Under Namespace

Classes: AlreadySubscribedError, ChannelNotFoundError, Error, UnknownCommandError

Constant Summary

Constants included from Logging

Logging::PREFIX

Instance Method Summary collapse

Methods included from Logging

logger

Constructor Details

#initialize(connection) ⇒ Subscriptions

Returns a new instance of Subscriptions.



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# File 'lib/lite_cable/connection/subscriptions.rb', line 13

def initialize(connection)
  @connection = connection
  @subscriptions = {}
end

Instance Method Details

#add(identifier, subscribe = true) ⇒ Object

Raises:



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# File 'lib/lite_cable/connection/subscriptions.rb', line 22

def add(identifier, subscribe = true)
  raise AlreadySubscribedError if find(identifier)

  params = connection.coder.decode(identifier)

  channel_id = params.delete("channel")

  channel_class = Channel::Registry.find!(channel_id)

  subscriptions[identifier] = channel_class.new(connection, identifier, params)
  subscribe ? subscribe_channel(subscriptions[identifier]) : subscriptions[identifier]
end

#execute_command(data) ⇒ Object 



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# File 'lib/lite_cable/connection/subscriptions.rb', line 52

def execute_command(data)
  command = data.delete("command")
  case command
  when "subscribe"   then add(data["identifier"])
  when "unsubscribe" then remove(data["identifier"])
  when "message"     then perform_action(data["identifier"], data["data"])
  else
    raise UnknownCommandError, "Command not found #{command}"
  end
end

#find(identifier) ⇒ Object 



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# File 'lib/lite_cable/connection/subscriptions.rb', line 63

def find(identifier)
  subscriptions[identifier]
end

#find!(identifier) ⇒ Object

Raises:



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# File 'lib/lite_cable/connection/subscriptions.rb', line 67

def find!(identifier)
  channel = find(identifier)
  raise ChannelNotFoundError unless channel
  channel
end

#identifiers ⇒ Object 



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# File 'lib/lite_cable/connection/subscriptions.rb', line 18

def identifiers
  subscriptions.keys
end

#perform_action(identifier, data) ⇒ Object 



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# File 'lib/lite_cable/connection/subscriptions.rb', line 47

def perform_action(identifier, data)
  channel = find!(identifier)
  channel.handle_action data
end

#remove(identifier) ⇒ Object 



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# File 'lib/lite_cable/connection/subscriptions.rb', line 35

def remove(identifier)
  channel = find!(identifier)
  subscriptions.delete(identifier)
  channel.handle_unsubscribe
  log(:debug) { log_fmt("Unsubscribed from channel #{channel.class.id}") }
  transmit_subscription_cancel(channel.identifier)
end

#remove_all ⇒ Object 



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# File 'lib/lite_cable/connection/subscriptions.rb', line 43

def remove_all
  subscriptions.keys.each(&method(:remove))
end