Class: Reacto::Operations::ChunkWhile

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

Instance Method Summary collapse

Constructor Details

#initialize(func, executor: nil) ⇒ ChunkWhile

Returns a new instance of ChunkWhile.



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

def initialize(func, executor: nil)
  @func = func
  @executor = executor
end

Instance Method Details

#call(tracker) ⇒ Object 



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# File 'lib/reacto/operations/chunk_while.rb', line 12

def call(tracker)
  current_data = []
  prev_value = NO_VALUE

  value = ->(v) do
    if prev_value == NO_VALUE
      prev_value = v
      current_data << v

      return
    end

    should_continue = @func.call(prev_value, v)
    prev_value = v

    unless should_continue
      flush_current(tracker, current_data)
      current_data = []
    end
    current_data << v
  end

  error = ->(e) do
    flush_current(tracker, current_data)
    tracker.on_error(e)
  end

  close = ->() do
    flush_current(tracker, current_data)
    tracker.on_close
  end

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

#flush_current(tracker, current_data) ⇒ Object 



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# File 'lib/reacto/operations/chunk_while.rb', line 49

def flush_current(tracker, current_data)
  tracker.on_value(
    Trackable.enumerable(current_data, executor: @executor)
  )
end