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Versions: 26
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Contents
require_relative "exceptions"
module Statesman
class Callback
attr_reader :from
attr_reader :to
attr_reader :callback
def initialize(options = { from: nil, to: nil, callback: nil })
unless options[:callback].respond_to?(:call)
raise InvalidCallbackError, "No callback passed"
end
@from = options[:from]
@to = Array(options[:to])
@callback = options[:callback]
end
def call(*args)
callback.call(*args)
end
def applies_to?(options = { from: nil, to: nil })
matches(options[:from], options[:to])
end
private
def matches(from, to)
matches_all_transitions ||
matches_to_state(from, to) ||
matches_from_state(from, to) ||
matches_both_states(from, to)
end
def matches_all_transitions
from.nil? && to.empty?
end
def matches_from_state(from, to)
(from == self.from && (to.nil? || self.to.empty?))
end
def matches_to_state(from, to)
((from.nil? || self.from.nil?) && self.to.include?(to))
end
def matches_both_states(from, to)
from == self.from && self.to.include?(to)
end
end
end
Version data entries
26 entries across 25 versions & 2 rubygems