class Q::Promise

Public Class Methods

new(defer) click to toggle source
# File lib/q/promise.rb, line 2
def initialize(defer)
  @defer = defer

  @thens = []
  @fails = []
  @alwayses = []
end

Public Instance Methods

always(&block) click to toggle source
# File lib/q/promise.rb, line 18
def always(&block)
  enqueue_and_call(@alwayses, block, :finished?)
end
fail(&block) click to toggle source
# File lib/q/promise.rb, line 14
def fail(&block)
  enqueue_and_call(@fails, block, :rejected?)
end
fulfill(type, result) click to toggle source
# File lib/q/promise.rb, line 22
def fulfill(type, result)
  @result = result

  if type == :resolved
    @thens.each { |callback| callback.call(@result) }
  elsif type == :rejected
    @fails.each { |callback| callback.call(@result) }
  end

  @alwayses.each { |callback| callback.call(@result) }
end
then(&block) click to toggle source
# File lib/q/promise.rb, line 10
def then(&block)
  enqueue_and_call(@thens, block, :resolved?)
end

Private Instance Methods

enqueue_and_call(queue, block, call_condition) click to toggle source
# File lib/q/promise.rb, line 36
def enqueue_and_call(queue, block, call_condition)
  callback = Q::Callback.new(self, block)
  queue << callback
  callback.call(@result) if @defer.send(call_condition)
  self
end