Module: ActionCableNotifications::Callbacks

Extended by:
ActiveSupport::Concern
Defined in:
lib/action_cable_notifications/callbacks.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#notify_create ⇒ Object

Broadcast notifications when a new record is created



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# File 'lib/action_cable_notifications/callbacks.rb', line 76

def notify_create
  self.ActionCableNotificationsOptions.each do |broadcasting, options|
    if options[:actions].include? :create
      # Checks if record is within scope before broadcasting
      if self.class.scoped_collection(options[:scope]).where(id: self.id)
        ActionCable.server.broadcast broadcasting,
          collection: self.model_name.collection,
          msg: 'added',
          id: self.id,
          data: self
      end
    end
  end
end

#notify_destroy ⇒ Object

Broadcast notifications when a record is destroyed.



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# File 'lib/action_cable_notifications/callbacks.rb', line 124

def notify_destroy
  self.ActionCableNotificationsOptions.each do |broadcasting, options|
    if options[:actions].include? :destroy
      # Checks if record is within scope before broadcasting
      if self.class.scoped_collection(options[:scope]).where(id: self.id)
        ActionCable.server.broadcast broadcasting,
          collection: self.model_name.collection,
          msg: 'removed',
          id: self.id
      end
    end
  end
end

#notify_update ⇒ Object

Broadcast notifications when a record is updated. Only changed field will be sent.



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# File 'lib/action_cable_notifications/callbacks.rb', line 95

def notify_update
  changes = {}
  self.changes.each do |k,v|
    changes[k] = v[1]
  end

  self.ActionCableNotificationsOptions.each do |broadcasting, options|
    if options[:actions].include? :update
      # Checks if record is within scope before broadcasting
      if self.class.scoped_collection(options[:scope]).where(id: self.id)
        # XXX: Performance required. For small data sets this should be
        # fast enough, but for large data sets this could be slow. As
        # clients should have a limited subset of the dataset loaded at a
        # time, caching the results already sent to clients in server memory
        # should not have a big impact in memory usage but can improve
        # performance for large data sets where only a sub
        ActionCable.server.broadcast broadcasting,
          collection: self.model_name.collection,
          msg: 'changed',
          id: self.id,
          data: changes
      end
    end
  end
end