Class: Reacto::Operations::EachCollect

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

Instance Method Summary collapse

Constructor Details

#initialize(n, reset_action: -> (_) { [] }, collect_action: nil, init_action: NO_ACTION, on_error: nil, on_close: nil) ⇒ EachCollect

Returns a new instance of EachCollect.



7
8
9
10
11
12
13
14
15
16
17
18
19
 
# File 'lib/reacto/operations/each_collect.rb', line 7

def initialize(
  n,
  reset_action: -> (_) { [] }, collect_action: nil,
  init_action: NO_ACTION, on_error: nil, on_close: nil
)
  @n = n
  @reset_action = reset_action
  @collect_action = collect_action
  @init_action = init_action

  @error = on_error
  @close = on_close
end

Instance Method Details

#call(tracker) ⇒ Object 



21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
 
# File 'lib/reacto/operations/each_collect.rb', line 21

def call(tracker)
  current = []
  @init_action.call

  unless @collect_action
    @collect_action = -> (value, collection) { collection << value }
  end

  error = @error ? @error : ->(e) do
    tracker.on_value(current) unless current.empty?
    tracker.on_error(e)
  end
  close = @close ? @close : ->() do
    tracker.on_value(current) unless current.empty?
    tracker.on_close
  end

  error = error == NO_ACTION ? tracker.method(:on_error) : error
  close = close == NO_ACTION ? tracker.method(:on_close) : close

  behaviour = -> (value) do
    @collect_action.call(value, current)

    if current.size == @n
      tracker.on_value(current)

      current = @reset_action.call(current)
    end
  end

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