Class: Reacto::Operations::OperationOnLabeled

Inherits:
Object
  • Object
show all
Defined in:
lib/reacto/operations/operation_on_labeled.rb

Instance Method Summary collapse

Constructor Details

#initialize(label, action, op: :map, **args) ⇒ OperationOnLabeled

Returns a new instance of OperationOnLabeled.



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# File 'lib/reacto/operations/operation_on_labeled.rb', line 6

def initialize(label, action, op: :map, **args)
  @op = op
  @action = action
  @label = label
  @args = args
end

Instance Method Details

#call(tracker) ⇒ Object 



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# File 'lib/reacto/operations/operation_on_labeled.rb', line 13

def call(tracker)
  value = -> (v) do
    to_emit =
      if v.is_a?(LabeledTrackable) && v.label == @label
        v.send(@op, **@args, &@action)
      else
        v
      end

    tracker.on_value(to_emit)
  end

  Subscriptions::OperationSubscription.new(tracker, value: value)
end