Class: Reacto::Operations::FlatMap

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

Instance Method Summary collapse

Constructor Details

#initialize(transform) ⇒ FlatMap

Returns a new instance of FlatMap.



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# File 'lib/reacto/operations/flat_map.rb', line 7

def initialize(transform)
  @transform = transform
end

Instance Method Details

#call(tracker) ⇒ Object 



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# File 'lib/reacto/operations/flat_map.rb', line 11

def call(tracker)
  subscription = Subscriptions::FlatMapSubscription.new(tracker)
  value = ->(v) do
    trackable = @transform.call(v)

    trackable.do_track subscription.subscription!
  end

  close = ->() do
    subscription.source_closed = true
    return unless subscription.closed?

    tracker.on_close
  end

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